Mercurial > hg
annotate contrib/python-zstandard/zstandard/cffi.py @ 42937:69de49c4e39c
zstandard: vendor python-zstandard 0.12
The upstream source distribution from PyPI was extracted. Unwanted
files were removed.
The clang-format ignore list was updated to reflect the new source
of files.
test-repo-compengines.t was updated to reflect a change in behavior
of the zstd library.
The project contains a vendored copy of zstandard 1.4.3. The old
version was 1.3.8. This should result in some minor performance wins.
# no-check-commit because 3rd party code has different style guidelines
Differential Revision: https://phab.mercurial-scm.org/D6858
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sun, 15 Sep 2019 20:04:00 -0700 |
parents | 675775c33ab6 |
children | de7838053207 |
rev | line source |
---|---|
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1 # Copyright (c) 2016-present, Gregory Szorc |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2 # All rights reserved. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
3 # |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
4 # This software may be modified and distributed under the terms |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
5 # of the BSD license. See the LICENSE file for details. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
6 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
7 """Python interface to the Zstandard (zstd) compression library.""" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
8 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
9 from __future__ import absolute_import, unicode_literals |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
10 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
11 # This should match what the C extension exports. |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
12 __all__ = [ |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
13 #'BufferSegment', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
14 #'BufferSegments', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
15 #'BufferWithSegments', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
16 #'BufferWithSegmentsCollection', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
17 'CompressionParameters', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
18 'ZstdCompressionDict', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
19 'ZstdCompressionParameters', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
20 'ZstdCompressor', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
21 'ZstdError', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
22 'ZstdDecompressor', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
23 'FrameParameters', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
24 'estimate_decompression_context_size', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
25 'frame_content_size', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
26 'frame_header_size', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
27 'get_frame_parameters', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
28 'train_dictionary', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
29 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
30 # Constants. |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
31 'FLUSH_BLOCK', |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
32 'FLUSH_FRAME', |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
33 'COMPRESSOBJ_FLUSH_FINISH', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
34 'COMPRESSOBJ_FLUSH_BLOCK', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
35 'ZSTD_VERSION', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
36 'FRAME_HEADER', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
37 'CONTENTSIZE_UNKNOWN', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
38 'CONTENTSIZE_ERROR', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
39 'MAX_COMPRESSION_LEVEL', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
40 'COMPRESSION_RECOMMENDED_INPUT_SIZE', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
41 'COMPRESSION_RECOMMENDED_OUTPUT_SIZE', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
42 'DECOMPRESSION_RECOMMENDED_INPUT_SIZE', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
43 'DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
44 'MAGIC_NUMBER', |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
45 'BLOCKSIZELOG_MAX', |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
46 'BLOCKSIZE_MAX', |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
47 'WINDOWLOG_MIN', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
48 'WINDOWLOG_MAX', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
49 'CHAINLOG_MIN', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
50 'CHAINLOG_MAX', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
51 'HASHLOG_MIN', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
52 'HASHLOG_MAX', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
53 'HASHLOG3_MAX', |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
54 'MINMATCH_MIN', |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
55 'MINMATCH_MAX', |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
56 'SEARCHLOG_MIN', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
57 'SEARCHLOG_MAX', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
58 'SEARCHLENGTH_MIN', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
59 'SEARCHLENGTH_MAX', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
60 'TARGETLENGTH_MIN', |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
61 'TARGETLENGTH_MAX', |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
62 'LDM_MINMATCH_MIN', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
63 'LDM_MINMATCH_MAX', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
64 'LDM_BUCKETSIZELOG_MAX', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
65 'STRATEGY_FAST', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
66 'STRATEGY_DFAST', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
67 'STRATEGY_GREEDY', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
68 'STRATEGY_LAZY', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
69 'STRATEGY_LAZY2', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
70 'STRATEGY_BTLAZY2', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
71 'STRATEGY_BTOPT', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
72 'STRATEGY_BTULTRA', |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
73 'STRATEGY_BTULTRA2', |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
74 'DICT_TYPE_AUTO', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
75 'DICT_TYPE_RAWCONTENT', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
76 'DICT_TYPE_FULLDICT', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
77 'FORMAT_ZSTD1', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
78 'FORMAT_ZSTD1_MAGICLESS', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
79 ] |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
80 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
81 import io |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
82 import os |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
83 import sys |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
84 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
85 from _zstd_cffi import ( |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
86 ffi, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
87 lib, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
88 ) |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
89 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
90 if sys.version_info[0] == 2: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
91 bytes_type = str |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
92 int_type = long |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
93 else: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
94 bytes_type = bytes |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
95 int_type = int |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
96 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
97 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
98 COMPRESSION_RECOMMENDED_INPUT_SIZE = lib.ZSTD_CStreamInSize() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
99 COMPRESSION_RECOMMENDED_OUTPUT_SIZE = lib.ZSTD_CStreamOutSize() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
100 DECOMPRESSION_RECOMMENDED_INPUT_SIZE = lib.ZSTD_DStreamInSize() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
101 DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE = lib.ZSTD_DStreamOutSize() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
102 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
103 new_nonzero = ffi.new_allocator(should_clear_after_alloc=False) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
104 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
105 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
106 MAX_COMPRESSION_LEVEL = lib.ZSTD_maxCLevel() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
107 MAGIC_NUMBER = lib.ZSTD_MAGICNUMBER |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
108 FRAME_HEADER = b'\x28\xb5\x2f\xfd' |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
109 CONTENTSIZE_UNKNOWN = lib.ZSTD_CONTENTSIZE_UNKNOWN |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
110 CONTENTSIZE_ERROR = lib.ZSTD_CONTENTSIZE_ERROR |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
111 ZSTD_VERSION = (lib.ZSTD_VERSION_MAJOR, lib.ZSTD_VERSION_MINOR, lib.ZSTD_VERSION_RELEASE) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
112 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
113 BLOCKSIZELOG_MAX = lib.ZSTD_BLOCKSIZELOG_MAX |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
114 BLOCKSIZE_MAX = lib.ZSTD_BLOCKSIZE_MAX |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
115 WINDOWLOG_MIN = lib.ZSTD_WINDOWLOG_MIN |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
116 WINDOWLOG_MAX = lib.ZSTD_WINDOWLOG_MAX |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
117 CHAINLOG_MIN = lib.ZSTD_CHAINLOG_MIN |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
118 CHAINLOG_MAX = lib.ZSTD_CHAINLOG_MAX |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
119 HASHLOG_MIN = lib.ZSTD_HASHLOG_MIN |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
120 HASHLOG_MAX = lib.ZSTD_HASHLOG_MAX |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
121 HASHLOG3_MAX = lib.ZSTD_HASHLOG3_MAX |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
122 MINMATCH_MIN = lib.ZSTD_MINMATCH_MIN |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
123 MINMATCH_MAX = lib.ZSTD_MINMATCH_MAX |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
124 SEARCHLOG_MIN = lib.ZSTD_SEARCHLOG_MIN |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
125 SEARCHLOG_MAX = lib.ZSTD_SEARCHLOG_MAX |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
126 SEARCHLENGTH_MIN = lib.ZSTD_MINMATCH_MIN |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
127 SEARCHLENGTH_MAX = lib.ZSTD_MINMATCH_MAX |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
128 TARGETLENGTH_MIN = lib.ZSTD_TARGETLENGTH_MIN |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
129 TARGETLENGTH_MAX = lib.ZSTD_TARGETLENGTH_MAX |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
130 LDM_MINMATCH_MIN = lib.ZSTD_LDM_MINMATCH_MIN |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
131 LDM_MINMATCH_MAX = lib.ZSTD_LDM_MINMATCH_MAX |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
132 LDM_BUCKETSIZELOG_MAX = lib.ZSTD_LDM_BUCKETSIZELOG_MAX |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
133 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
134 STRATEGY_FAST = lib.ZSTD_fast |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
135 STRATEGY_DFAST = lib.ZSTD_dfast |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
136 STRATEGY_GREEDY = lib.ZSTD_greedy |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
137 STRATEGY_LAZY = lib.ZSTD_lazy |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
138 STRATEGY_LAZY2 = lib.ZSTD_lazy2 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
139 STRATEGY_BTLAZY2 = lib.ZSTD_btlazy2 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
140 STRATEGY_BTOPT = lib.ZSTD_btopt |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
141 STRATEGY_BTULTRA = lib.ZSTD_btultra |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
142 STRATEGY_BTULTRA2 = lib.ZSTD_btultra2 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
143 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
144 DICT_TYPE_AUTO = lib.ZSTD_dct_auto |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
145 DICT_TYPE_RAWCONTENT = lib.ZSTD_dct_rawContent |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
146 DICT_TYPE_FULLDICT = lib.ZSTD_dct_fullDict |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
147 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
148 FORMAT_ZSTD1 = lib.ZSTD_f_zstd1 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
149 FORMAT_ZSTD1_MAGICLESS = lib.ZSTD_f_zstd1_magicless |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
150 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
151 FLUSH_BLOCK = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
152 FLUSH_FRAME = 1 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
153 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
154 COMPRESSOBJ_FLUSH_FINISH = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
155 COMPRESSOBJ_FLUSH_BLOCK = 1 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
156 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
157 |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
158 def _cpu_count(): |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
159 # os.cpu_count() was introducd in Python 3.4. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
160 try: |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
161 return os.cpu_count() or 0 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
162 except AttributeError: |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
163 pass |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
164 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
165 # Linux. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
166 try: |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
167 if sys.version_info[0] == 2: |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
168 return os.sysconf(b'SC_NPROCESSORS_ONLN') |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
169 else: |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
170 return os.sysconf(u'SC_NPROCESSORS_ONLN') |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
171 except (AttributeError, ValueError): |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
172 pass |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
173 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
174 # TODO implement on other platforms. |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
175 return 0 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
176 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
177 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
178 class ZstdError(Exception): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
179 pass |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
180 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
181 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
182 def _zstd_error(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
183 # Resolves to bytes on Python 2 and 3. We use the string for formatting |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
184 # into error messages, which will be literal unicode. So convert it to |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
185 # unicode. |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
186 return ffi.string(lib.ZSTD_getErrorName(zresult)).decode('utf-8') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
187 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
188 def _make_cctx_params(params): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
189 res = lib.ZSTD_createCCtxParams() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
190 if res == ffi.NULL: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
191 raise MemoryError() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
192 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
193 res = ffi.gc(res, lib.ZSTD_freeCCtxParams) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
194 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
195 attrs = [ |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
196 (lib.ZSTD_c_format, params.format), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
197 (lib.ZSTD_c_compressionLevel, params.compression_level), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
198 (lib.ZSTD_c_windowLog, params.window_log), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
199 (lib.ZSTD_c_hashLog, params.hash_log), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
200 (lib.ZSTD_c_chainLog, params.chain_log), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
201 (lib.ZSTD_c_searchLog, params.search_log), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
202 (lib.ZSTD_c_minMatch, params.min_match), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
203 (lib.ZSTD_c_targetLength, params.target_length), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
204 (lib.ZSTD_c_strategy, params.compression_strategy), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
205 (lib.ZSTD_c_contentSizeFlag, params.write_content_size), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
206 (lib.ZSTD_c_checksumFlag, params.write_checksum), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
207 (lib.ZSTD_c_dictIDFlag, params.write_dict_id), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
208 (lib.ZSTD_c_nbWorkers, params.threads), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
209 (lib.ZSTD_c_jobSize, params.job_size), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
210 (lib.ZSTD_c_overlapLog, params.overlap_log), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
211 (lib.ZSTD_c_forceMaxWindow, params.force_max_window), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
212 (lib.ZSTD_c_enableLongDistanceMatching, params.enable_ldm), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
213 (lib.ZSTD_c_ldmHashLog, params.ldm_hash_log), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
214 (lib.ZSTD_c_ldmMinMatch, params.ldm_min_match), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
215 (lib.ZSTD_c_ldmBucketSizeLog, params.ldm_bucket_size_log), |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
216 (lib.ZSTD_c_ldmHashRateLog, params.ldm_hash_rate_log), |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
217 ] |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
218 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
219 for param, value in attrs: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
220 _set_compression_parameter(res, param, value) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
221 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
222 return res |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
223 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
224 class ZstdCompressionParameters(object): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
225 @staticmethod |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
226 def from_level(level, source_size=0, dict_size=0, **kwargs): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
227 params = lib.ZSTD_getCParams(level, source_size, dict_size) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
228 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
229 args = { |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
230 'window_log': 'windowLog', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
231 'chain_log': 'chainLog', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
232 'hash_log': 'hashLog', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
233 'search_log': 'searchLog', |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
234 'min_match': 'minMatch', |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
235 'target_length': 'targetLength', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
236 'compression_strategy': 'strategy', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
237 } |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
238 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
239 for arg, attr in args.items(): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
240 if arg not in kwargs: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
241 kwargs[arg] = getattr(params, attr) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
242 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
243 return ZstdCompressionParameters(**kwargs) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
244 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
245 def __init__(self, format=0, compression_level=0, window_log=0, hash_log=0, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
246 chain_log=0, search_log=0, min_match=0, target_length=0, |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
247 strategy=-1, compression_strategy=-1, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
248 write_content_size=1, write_checksum=0, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
249 write_dict_id=0, job_size=0, overlap_log=-1, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
250 overlap_size_log=-1, force_max_window=0, enable_ldm=0, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
251 ldm_hash_log=0, ldm_min_match=0, ldm_bucket_size_log=0, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
252 ldm_hash_rate_log=-1, ldm_hash_every_log=-1, threads=0): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
253 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
254 params = lib.ZSTD_createCCtxParams() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
255 if params == ffi.NULL: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
256 raise MemoryError() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
257 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
258 params = ffi.gc(params, lib.ZSTD_freeCCtxParams) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
259 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
260 self._params = params |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
261 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
262 if threads < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
263 threads = _cpu_count() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
264 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
265 # We need to set ZSTD_c_nbWorkers before ZSTD_c_jobSize and ZSTD_c_overlapLog |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
266 # because setting ZSTD_c_nbWorkers resets the other parameters. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
267 _set_compression_parameter(params, lib.ZSTD_c_nbWorkers, threads) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
268 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
269 _set_compression_parameter(params, lib.ZSTD_c_format, format) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
270 _set_compression_parameter(params, lib.ZSTD_c_compressionLevel, compression_level) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
271 _set_compression_parameter(params, lib.ZSTD_c_windowLog, window_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
272 _set_compression_parameter(params, lib.ZSTD_c_hashLog, hash_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
273 _set_compression_parameter(params, lib.ZSTD_c_chainLog, chain_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
274 _set_compression_parameter(params, lib.ZSTD_c_searchLog, search_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
275 _set_compression_parameter(params, lib.ZSTD_c_minMatch, min_match) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
276 _set_compression_parameter(params, lib.ZSTD_c_targetLength, target_length) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
277 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
278 if strategy != -1 and compression_strategy != -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
279 raise ValueError('cannot specify both compression_strategy and strategy') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
280 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
281 if compression_strategy != -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
282 strategy = compression_strategy |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
283 elif strategy == -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
284 strategy = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
285 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
286 _set_compression_parameter(params, lib.ZSTD_c_strategy, strategy) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
287 _set_compression_parameter(params, lib.ZSTD_c_contentSizeFlag, write_content_size) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
288 _set_compression_parameter(params, lib.ZSTD_c_checksumFlag, write_checksum) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
289 _set_compression_parameter(params, lib.ZSTD_c_dictIDFlag, write_dict_id) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
290 _set_compression_parameter(params, lib.ZSTD_c_jobSize, job_size) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
291 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
292 if overlap_log != -1 and overlap_size_log != -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
293 raise ValueError('cannot specify both overlap_log and overlap_size_log') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
294 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
295 if overlap_size_log != -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
296 overlap_log = overlap_size_log |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
297 elif overlap_log == -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
298 overlap_log = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
299 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
300 _set_compression_parameter(params, lib.ZSTD_c_overlapLog, overlap_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
301 _set_compression_parameter(params, lib.ZSTD_c_forceMaxWindow, force_max_window) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
302 _set_compression_parameter(params, lib.ZSTD_c_enableLongDistanceMatching, enable_ldm) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
303 _set_compression_parameter(params, lib.ZSTD_c_ldmHashLog, ldm_hash_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
304 _set_compression_parameter(params, lib.ZSTD_c_ldmMinMatch, ldm_min_match) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
305 _set_compression_parameter(params, lib.ZSTD_c_ldmBucketSizeLog, ldm_bucket_size_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
306 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
307 if ldm_hash_rate_log != -1 and ldm_hash_every_log != -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
308 raise ValueError('cannot specify both ldm_hash_rate_log and ldm_hash_every_log') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
309 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
310 if ldm_hash_every_log != -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
311 ldm_hash_rate_log = ldm_hash_every_log |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
312 elif ldm_hash_rate_log == -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
313 ldm_hash_rate_log = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
314 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
315 _set_compression_parameter(params, lib.ZSTD_c_ldmHashRateLog, ldm_hash_rate_log) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
316 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
317 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
318 def format(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
319 return _get_compression_parameter(self._params, lib.ZSTD_c_format) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
320 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
321 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
322 def compression_level(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
323 return _get_compression_parameter(self._params, lib.ZSTD_c_compressionLevel) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
324 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
325 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
326 def window_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
327 return _get_compression_parameter(self._params, lib.ZSTD_c_windowLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
328 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
329 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
330 def hash_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
331 return _get_compression_parameter(self._params, lib.ZSTD_c_hashLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
332 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
333 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
334 def chain_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
335 return _get_compression_parameter(self._params, lib.ZSTD_c_chainLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
336 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
337 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
338 def search_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
339 return _get_compression_parameter(self._params, lib.ZSTD_c_searchLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
340 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
341 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
342 def min_match(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
343 return _get_compression_parameter(self._params, lib.ZSTD_c_minMatch) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
344 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
345 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
346 def target_length(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
347 return _get_compression_parameter(self._params, lib.ZSTD_c_targetLength) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
348 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
349 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
350 def compression_strategy(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
351 return _get_compression_parameter(self._params, lib.ZSTD_c_strategy) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
352 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
353 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
354 def write_content_size(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
355 return _get_compression_parameter(self._params, lib.ZSTD_c_contentSizeFlag) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
356 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
357 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
358 def write_checksum(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
359 return _get_compression_parameter(self._params, lib.ZSTD_c_checksumFlag) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
360 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
361 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
362 def write_dict_id(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
363 return _get_compression_parameter(self._params, lib.ZSTD_c_dictIDFlag) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
364 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
365 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
366 def job_size(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
367 return _get_compression_parameter(self._params, lib.ZSTD_c_jobSize) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
368 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
369 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
370 def overlap_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
371 return _get_compression_parameter(self._params, lib.ZSTD_c_overlapLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
372 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
373 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
374 def overlap_size_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
375 return self.overlap_log |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
376 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
377 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
378 def force_max_window(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
379 return _get_compression_parameter(self._params, lib.ZSTD_c_forceMaxWindow) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
380 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
381 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
382 def enable_ldm(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
383 return _get_compression_parameter(self._params, lib.ZSTD_c_enableLongDistanceMatching) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
384 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
385 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
386 def ldm_hash_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
387 return _get_compression_parameter(self._params, lib.ZSTD_c_ldmHashLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
388 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
389 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
390 def ldm_min_match(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
391 return _get_compression_parameter(self._params, lib.ZSTD_c_ldmMinMatch) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
392 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
393 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
394 def ldm_bucket_size_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
395 return _get_compression_parameter(self._params, lib.ZSTD_c_ldmBucketSizeLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
396 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
397 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
398 def ldm_hash_rate_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
399 return _get_compression_parameter(self._params, lib.ZSTD_c_ldmHashRateLog) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
400 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
401 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
402 def ldm_hash_every_log(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
403 return self.ldm_hash_rate_log |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
404 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
405 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
406 def threads(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
407 return _get_compression_parameter(self._params, lib.ZSTD_c_nbWorkers) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
408 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
409 def estimated_compression_context_size(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
410 return lib.ZSTD_estimateCCtxSize_usingCCtxParams(self._params) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
411 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
412 CompressionParameters = ZstdCompressionParameters |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
413 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
414 def estimate_decompression_context_size(): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
415 return lib.ZSTD_estimateDCtxSize() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
416 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
417 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
418 def _set_compression_parameter(params, param, value): |
42937
69de49c4e39c
zstandard: vendor python-zstandard 0.12
Gregory Szorc <gregory.szorc@gmail.com>
parents:
42070
diff
changeset
|
419 zresult = lib.ZSTD_CCtxParams_setParameter(params, param, value) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
420 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
421 raise ZstdError('unable to set compression context parameter: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
422 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
423 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
424 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
425 def _get_compression_parameter(params, param): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
426 result = ffi.new('int *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
427 |
42937
69de49c4e39c
zstandard: vendor python-zstandard 0.12
Gregory Szorc <gregory.szorc@gmail.com>
parents:
42070
diff
changeset
|
428 zresult = lib.ZSTD_CCtxParams_getParameter(params, param, result) |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
429 if lib.ZSTD_isError(zresult): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
430 raise ZstdError('unable to get compression context parameter: %s' % |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
431 _zstd_error(zresult)) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
432 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
433 return result[0] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
434 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
435 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
436 class ZstdCompressionWriter(object): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
437 def __init__(self, compressor, writer, source_size, write_size, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
438 write_return_read): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
439 self._compressor = compressor |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
440 self._writer = writer |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
441 self._write_size = write_size |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
442 self._write_return_read = bool(write_return_read) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
443 self._entered = False |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
444 self._closed = False |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
445 self._bytes_compressed = 0 |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
446 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
447 self._dst_buffer = ffi.new('char[]', write_size) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
448 self._out_buffer = ffi.new('ZSTD_outBuffer *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
449 self._out_buffer.dst = self._dst_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
450 self._out_buffer.size = len(self._dst_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
451 self._out_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
452 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
453 zresult = lib.ZSTD_CCtx_setPledgedSrcSize(compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
454 source_size) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
455 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
456 raise ZstdError('error setting source size: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
457 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
458 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
459 def __enter__(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
460 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
461 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
462 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
463 if self._entered: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
464 raise ZstdError('cannot __enter__ multiple times') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
465 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
466 self._entered = True |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
467 return self |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
468 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
469 def __exit__(self, exc_type, exc_value, exc_tb): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
470 self._entered = False |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
471 |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
472 if not exc_type and not exc_value and not exc_tb: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
473 self.close() |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
474 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
475 self._compressor = None |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
476 |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
477 return False |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
478 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
479 def memory_size(self): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
480 return lib.ZSTD_sizeof_CCtx(self._compressor._cctx) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
481 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
482 def fileno(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
483 f = getattr(self._writer, 'fileno', None) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
484 if f: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
485 return f() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
486 else: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
487 raise OSError('fileno not available on underlying writer') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
488 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
489 def close(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
490 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
491 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
492 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
493 try: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
494 self.flush(FLUSH_FRAME) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
495 finally: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
496 self._closed = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
497 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
498 # Call close() on underlying stream as well. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
499 f = getattr(self._writer, 'close', None) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
500 if f: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
501 f() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
502 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
503 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
504 def closed(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
505 return self._closed |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
506 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
507 def isatty(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
508 return False |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
509 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
510 def readable(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
511 return False |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
512 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
513 def readline(self, size=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
514 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
515 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
516 def readlines(self, hint=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
517 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
518 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
519 def seek(self, offset, whence=None): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
520 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
521 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
522 def seekable(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
523 return False |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
524 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
525 def truncate(self, size=None): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
526 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
527 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
528 def writable(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
529 return True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
530 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
531 def writelines(self, lines): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
532 raise NotImplementedError('writelines() is not yet implemented') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
533 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
534 def read(self, size=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
535 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
536 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
537 def readall(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
538 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
539 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
540 def readinto(self, b): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
541 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
542 |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
543 def write(self, data): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
544 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
545 raise ValueError('stream is closed') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
546 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
547 total_write = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
548 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
549 data_buffer = ffi.from_buffer(data) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
550 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
551 in_buffer = ffi.new('ZSTD_inBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
552 in_buffer.src = data_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
553 in_buffer.size = len(data_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
554 in_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
555 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
556 out_buffer = self._out_buffer |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
557 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
558 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
559 while in_buffer.pos < in_buffer.size: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
560 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
561 out_buffer, in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
562 lib.ZSTD_e_continue) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
563 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
564 raise ZstdError('zstd compress error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
565 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
566 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
567 if out_buffer.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
568 self._writer.write(ffi.buffer(out_buffer.dst, out_buffer.pos)[:]) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
569 total_write += out_buffer.pos |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
570 self._bytes_compressed += out_buffer.pos |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
571 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
572 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
573 if self._write_return_read: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
574 return in_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
575 else: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
576 return total_write |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
577 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
578 def flush(self, flush_mode=FLUSH_BLOCK): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
579 if flush_mode == FLUSH_BLOCK: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
580 flush = lib.ZSTD_e_flush |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
581 elif flush_mode == FLUSH_FRAME: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
582 flush = lib.ZSTD_e_end |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
583 else: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
584 raise ValueError('unknown flush_mode: %r' % flush_mode) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
585 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
586 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
587 raise ValueError('stream is closed') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
588 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
589 total_write = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
590 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
591 out_buffer = self._out_buffer |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
592 out_buffer.pos = 0 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
593 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
594 in_buffer = ffi.new('ZSTD_inBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
595 in_buffer.src = ffi.NULL |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
596 in_buffer.size = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
597 in_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
598 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
599 while True: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
600 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
601 out_buffer, in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
602 flush) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
603 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
604 raise ZstdError('zstd compress error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
605 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
606 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
607 if out_buffer.pos: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
608 self._writer.write(ffi.buffer(out_buffer.dst, out_buffer.pos)[:]) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
609 total_write += out_buffer.pos |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
610 self._bytes_compressed += out_buffer.pos |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
611 out_buffer.pos = 0 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
612 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
613 if not zresult: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
614 break |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
615 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
616 return total_write |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
617 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
618 def tell(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
619 return self._bytes_compressed |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
620 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
621 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
622 class ZstdCompressionObj(object): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
623 def compress(self, data): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
624 if self._finished: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
625 raise ZstdError('cannot call compress() after compressor finished') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
626 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
627 data_buffer = ffi.from_buffer(data) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
628 source = ffi.new('ZSTD_inBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
629 source.src = data_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
630 source.size = len(data_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
631 source.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
632 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
633 chunks = [] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
634 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
635 while source.pos < len(data): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
636 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
637 self._out, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
638 source, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
639 lib.ZSTD_e_continue) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
640 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
641 raise ZstdError('zstd compress error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
642 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
643 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
644 if self._out.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
645 chunks.append(ffi.buffer(self._out.dst, self._out.pos)[:]) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
646 self._out.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
647 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
648 return b''.join(chunks) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
649 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
650 def flush(self, flush_mode=COMPRESSOBJ_FLUSH_FINISH): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
651 if flush_mode not in (COMPRESSOBJ_FLUSH_FINISH, COMPRESSOBJ_FLUSH_BLOCK): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
652 raise ValueError('flush mode not recognized') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
653 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
654 if self._finished: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
655 raise ZstdError('compressor object already finished') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
656 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
657 if flush_mode == COMPRESSOBJ_FLUSH_BLOCK: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
658 z_flush_mode = lib.ZSTD_e_flush |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
659 elif flush_mode == COMPRESSOBJ_FLUSH_FINISH: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
660 z_flush_mode = lib.ZSTD_e_end |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
661 self._finished = True |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
662 else: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
663 raise ZstdError('unhandled flush mode') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
664 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
665 assert self._out.pos == 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
666 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
667 in_buffer = ffi.new('ZSTD_inBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
668 in_buffer.src = ffi.NULL |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
669 in_buffer.size = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
670 in_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
671 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
672 chunks = [] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
673 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
674 while True: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
675 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
676 self._out, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
677 in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
678 z_flush_mode) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
679 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
680 raise ZstdError('error ending compression stream: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
681 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
682 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
683 if self._out.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
684 chunks.append(ffi.buffer(self._out.dst, self._out.pos)[:]) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
685 self._out.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
686 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
687 if not zresult: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
688 break |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
689 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
690 return b''.join(chunks) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
691 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
692 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
693 class ZstdCompressionChunker(object): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
694 def __init__(self, compressor, chunk_size): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
695 self._compressor = compressor |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
696 self._out = ffi.new('ZSTD_outBuffer *') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
697 self._dst_buffer = ffi.new('char[]', chunk_size) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
698 self._out.dst = self._dst_buffer |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
699 self._out.size = chunk_size |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
700 self._out.pos = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
701 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
702 self._in = ffi.new('ZSTD_inBuffer *') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
703 self._in.src = ffi.NULL |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
704 self._in.size = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
705 self._in.pos = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
706 self._finished = False |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
707 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
708 def compress(self, data): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
709 if self._finished: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
710 raise ZstdError('cannot call compress() after compression finished') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
711 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
712 if self._in.src != ffi.NULL: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
713 raise ZstdError('cannot perform operation before consuming output ' |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
714 'from previous operation') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
715 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
716 data_buffer = ffi.from_buffer(data) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
717 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
718 if not len(data_buffer): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
719 return |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
720 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
721 self._in.src = data_buffer |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
722 self._in.size = len(data_buffer) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
723 self._in.pos = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
724 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
725 while self._in.pos < self._in.size: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
726 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
727 self._out, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
728 self._in, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
729 lib.ZSTD_e_continue) |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
730 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
731 if self._in.pos == self._in.size: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
732 self._in.src = ffi.NULL |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
733 self._in.size = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
734 self._in.pos = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
735 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
736 if lib.ZSTD_isError(zresult): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
737 raise ZstdError('zstd compress error: %s' % |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
738 _zstd_error(zresult)) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
739 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
740 if self._out.pos == self._out.size: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
741 yield ffi.buffer(self._out.dst, self._out.pos)[:] |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
742 self._out.pos = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
743 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
744 def flush(self): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
745 if self._finished: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
746 raise ZstdError('cannot call flush() after compression finished') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
747 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
748 if self._in.src != ffi.NULL: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
749 raise ZstdError('cannot call flush() before consuming output from ' |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
750 'previous operation') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
751 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
752 while True: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
753 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
754 self._out, self._in, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
755 lib.ZSTD_e_flush) |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
756 if lib.ZSTD_isError(zresult): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
757 raise ZstdError('zstd compress error: %s' % _zstd_error(zresult)) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
758 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
759 if self._out.pos: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
760 yield ffi.buffer(self._out.dst, self._out.pos)[:] |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
761 self._out.pos = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
762 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
763 if not zresult: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
764 return |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
765 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
766 def finish(self): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
767 if self._finished: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
768 raise ZstdError('cannot call finish() after compression finished') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
769 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
770 if self._in.src != ffi.NULL: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
771 raise ZstdError('cannot call finish() before consuming output from ' |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
772 'previous operation') |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
773 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
774 while True: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
775 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
776 self._out, self._in, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
777 lib.ZSTD_e_end) |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
778 if lib.ZSTD_isError(zresult): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
779 raise ZstdError('zstd compress error: %s' % _zstd_error(zresult)) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
780 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
781 if self._out.pos: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
782 yield ffi.buffer(self._out.dst, self._out.pos)[:] |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
783 self._out.pos = 0 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
784 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
785 if not zresult: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
786 self._finished = True |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
787 return |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
788 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
789 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
790 class ZstdCompressionReader(object): |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
791 def __init__(self, compressor, source, read_size): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
792 self._compressor = compressor |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
793 self._source = source |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
794 self._read_size = read_size |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
795 self._entered = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
796 self._closed = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
797 self._bytes_compressed = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
798 self._finished_input = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
799 self._finished_output = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
800 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
801 self._in_buffer = ffi.new('ZSTD_inBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
802 # Holds a ref so backing bytes in self._in_buffer stay alive. |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
803 self._source_buffer = None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
804 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
805 def __enter__(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
806 if self._entered: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
807 raise ValueError('cannot __enter__ multiple times') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
808 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
809 self._entered = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
810 return self |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
811 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
812 def __exit__(self, exc_type, exc_value, exc_tb): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
813 self._entered = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
814 self._closed = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
815 self._source = None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
816 self._compressor = None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
817 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
818 return False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
819 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
820 def readable(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
821 return True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
822 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
823 def writable(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
824 return False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
825 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
826 def seekable(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
827 return False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
828 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
829 def readline(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
830 raise io.UnsupportedOperation() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
831 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
832 def readlines(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
833 raise io.UnsupportedOperation() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
834 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
835 def write(self, data): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
836 raise OSError('stream is not writable') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
837 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
838 def writelines(self, ignored): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
839 raise OSError('stream is not writable') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
840 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
841 def isatty(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
842 return False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
843 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
844 def flush(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
845 return None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
846 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
847 def close(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
848 self._closed = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
849 return None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
850 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
851 @property |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
852 def closed(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
853 return self._closed |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
854 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
855 def tell(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
856 return self._bytes_compressed |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
857 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
858 def readall(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
859 chunks = [] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
860 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
861 while True: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
862 chunk = self.read(1048576) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
863 if not chunk: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
864 break |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
865 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
866 chunks.append(chunk) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
867 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
868 return b''.join(chunks) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
869 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
870 def __iter__(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
871 raise io.UnsupportedOperation() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
872 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
873 def __next__(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
874 raise io.UnsupportedOperation() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
875 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
876 next = __next__ |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
877 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
878 def _read_input(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
879 if self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
880 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
881 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
882 if hasattr(self._source, 'read'): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
883 data = self._source.read(self._read_size) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
884 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
885 if not data: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
886 self._finished_input = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
887 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
888 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
889 self._source_buffer = ffi.from_buffer(data) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
890 self._in_buffer.src = self._source_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
891 self._in_buffer.size = len(self._source_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
892 self._in_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
893 else: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
894 self._source_buffer = ffi.from_buffer(self._source) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
895 self._in_buffer.src = self._source_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
896 self._in_buffer.size = len(self._source_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
897 self._in_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
898 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
899 def _compress_into_buffer(self, out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
900 if self._in_buffer.pos >= self._in_buffer.size: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
901 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
902 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
903 old_pos = out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
904 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
905 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
906 out_buffer, self._in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
907 lib.ZSTD_e_continue) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
908 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
909 self._bytes_compressed += out_buffer.pos - old_pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
910 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
911 if self._in_buffer.pos == self._in_buffer.size: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
912 self._in_buffer.src = ffi.NULL |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
913 self._in_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
914 self._in_buffer.size = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
915 self._source_buffer = None |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
916 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
917 if not hasattr(self._source, 'read'): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
918 self._finished_input = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
919 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
920 if lib.ZSTD_isError(zresult): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
921 raise ZstdError('zstd compress error: %s', |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
922 _zstd_error(zresult)) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
923 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
924 return out_buffer.pos and out_buffer.pos == out_buffer.size |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
925 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
926 def read(self, size=-1): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
927 if self._closed: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
928 raise ValueError('stream is closed') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
929 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
930 if size < -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
931 raise ValueError('cannot read negative amounts less than -1') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
932 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
933 if size == -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
934 return self.readall() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
935 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
936 if self._finished_output or size == 0: |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
937 return b'' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
938 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
939 # Need a dedicated ref to dest buffer otherwise it gets collected. |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
940 dst_buffer = ffi.new('char[]', size) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
941 out_buffer = ffi.new('ZSTD_outBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
942 out_buffer.dst = dst_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
943 out_buffer.size = size |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
944 out_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
945 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
946 if self._compress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
947 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
948 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
949 while not self._finished_input: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
950 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
951 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
952 if self._compress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
953 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
954 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
955 # EOF |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
956 old_pos = out_buffer.pos |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
957 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
958 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
959 out_buffer, self._in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
960 lib.ZSTD_e_end) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
961 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
962 self._bytes_compressed += out_buffer.pos - old_pos |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
963 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
964 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
965 raise ZstdError('error ending compression stream: %s', |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
966 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
967 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
968 if zresult == 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
969 self._finished_output = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
970 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
971 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
972 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
973 def read1(self, size=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
974 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
975 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
976 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
977 if size < -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
978 raise ValueError('cannot read negative amounts less than -1') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
979 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
980 if self._finished_output or size == 0: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
981 return b'' |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
982 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
983 # -1 returns arbitrary number of bytes. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
984 if size == -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
985 size = COMPRESSION_RECOMMENDED_OUTPUT_SIZE |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
986 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
987 dst_buffer = ffi.new('char[]', size) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
988 out_buffer = ffi.new('ZSTD_outBuffer *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
989 out_buffer.dst = dst_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
990 out_buffer.size = size |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
991 out_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
992 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
993 # read1() dictates that we can perform at most 1 call to the |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
994 # underlying stream to get input. However, we can't satisfy this |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
995 # restriction with compression because not all input generates output. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
996 # It is possible to perform a block flush in order to ensure output. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
997 # But this may not be desirable behavior. So we allow multiple read() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
998 # to the underlying stream. But unlike read(), we stop once we have |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
999 # any output. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1000 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1001 self._compress_into_buffer(out_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1002 if out_buffer.pos: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1003 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1004 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1005 while not self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1006 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1007 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1008 # If we've filled the output buffer, return immediately. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1009 if self._compress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1010 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1011 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1012 # If we've populated the output buffer and we're not at EOF, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1013 # also return, as we've satisfied the read1() limits. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1014 if out_buffer.pos and not self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1015 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1016 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1017 # Else if we're at EOS and we have room left in the buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1018 # fall through to below and try to add more data to the output. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1019 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1020 # EOF. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1021 old_pos = out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1022 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1023 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1024 out_buffer, self._in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1025 lib.ZSTD_e_end) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1026 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1027 self._bytes_compressed += out_buffer.pos - old_pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1028 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1029 if lib.ZSTD_isError(zresult): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1030 raise ZstdError('error ending compression stream: %s' % |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1031 _zstd_error(zresult)) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1032 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1033 if zresult == 0: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1034 self._finished_output = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1035 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1036 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1037 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1038 def readinto(self, b): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1039 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1040 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1041 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1042 if self._finished_output: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1043 return 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1044 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1045 # TODO use writable=True once we require CFFI >= 1.12. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1046 dest_buffer = ffi.from_buffer(b) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1047 ffi.memmove(b, b'', 0) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1048 out_buffer = ffi.new('ZSTD_outBuffer *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1049 out_buffer.dst = dest_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1050 out_buffer.size = len(dest_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1051 out_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1052 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1053 if self._compress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1054 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1055 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1056 while not self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1057 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1058 if self._compress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1059 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1060 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1061 # EOF. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1062 old_pos = out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1063 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1064 out_buffer, self._in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1065 lib.ZSTD_e_end) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1066 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1067 self._bytes_compressed += out_buffer.pos - old_pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1068 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1069 if lib.ZSTD_isError(zresult): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1070 raise ZstdError('error ending compression stream: %s', |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1071 _zstd_error(zresult)) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1072 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1073 if zresult == 0: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1074 self._finished_output = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1075 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1076 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1077 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1078 def readinto1(self, b): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1079 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1080 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1081 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1082 if self._finished_output: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1083 return 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1084 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1085 # TODO use writable=True once we require CFFI >= 1.12. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1086 dest_buffer = ffi.from_buffer(b) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1087 ffi.memmove(b, b'', 0) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1088 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1089 out_buffer = ffi.new('ZSTD_outBuffer *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1090 out_buffer.dst = dest_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1091 out_buffer.size = len(dest_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1092 out_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1093 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1094 self._compress_into_buffer(out_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1095 if out_buffer.pos: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1096 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1097 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1098 while not self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1099 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1100 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1101 if self._compress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1102 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1103 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1104 if out_buffer.pos and not self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1105 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1106 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1107 # EOF. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1108 old_pos = out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1109 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1110 zresult = lib.ZSTD_compressStream2(self._compressor._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1111 out_buffer, self._in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1112 lib.ZSTD_e_end) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1113 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1114 self._bytes_compressed += out_buffer.pos - old_pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1115 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1116 if lib.ZSTD_isError(zresult): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1117 raise ZstdError('error ending compression stream: %s' % |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1118 _zstd_error(zresult)) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1119 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1120 if zresult == 0: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1121 self._finished_output = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1122 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1123 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1124 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1125 |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1126 class ZstdCompressor(object): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1127 def __init__(self, level=3, dict_data=None, compression_params=None, |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1128 write_checksum=None, write_content_size=None, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1129 write_dict_id=None, threads=0): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1130 if level > lib.ZSTD_maxCLevel(): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1131 raise ValueError('level must be less than %d' % lib.ZSTD_maxCLevel()) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1132 |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1133 if threads < 0: |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1134 threads = _cpu_count() |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1135 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1136 if compression_params and write_checksum is not None: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1137 raise ValueError('cannot define compression_params and ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1138 'write_checksum') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1139 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1140 if compression_params and write_content_size is not None: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1141 raise ValueError('cannot define compression_params and ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1142 'write_content_size') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1143 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1144 if compression_params and write_dict_id is not None: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1145 raise ValueError('cannot define compression_params and ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1146 'write_dict_id') |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1147 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1148 if compression_params and threads: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1149 raise ValueError('cannot define compression_params and threads') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1150 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1151 if compression_params: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1152 self._params = _make_cctx_params(compression_params) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1153 else: |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1154 if write_dict_id is None: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1155 write_dict_id = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1156 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1157 params = lib.ZSTD_createCCtxParams() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1158 if params == ffi.NULL: |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1159 raise MemoryError() |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1160 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1161 self._params = ffi.gc(params, lib.ZSTD_freeCCtxParams) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1162 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1163 _set_compression_parameter(self._params, |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1164 lib.ZSTD_c_compressionLevel, |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1165 level) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1166 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1167 _set_compression_parameter( |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1168 self._params, |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1169 lib.ZSTD_c_contentSizeFlag, |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1170 write_content_size if write_content_size is not None else 1) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1171 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1172 _set_compression_parameter(self._params, |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1173 lib.ZSTD_c_checksumFlag, |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1174 1 if write_checksum else 0) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1175 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1176 _set_compression_parameter(self._params, |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1177 lib.ZSTD_c_dictIDFlag, |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1178 1 if write_dict_id else 0) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1179 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1180 if threads: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1181 _set_compression_parameter(self._params, |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1182 lib.ZSTD_c_nbWorkers, |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1183 threads) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1184 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1185 cctx = lib.ZSTD_createCCtx() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1186 if cctx == ffi.NULL: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1187 raise MemoryError() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1188 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1189 self._cctx = cctx |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1190 self._dict_data = dict_data |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1191 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1192 # We defer setting up garbage collection until after calling |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1193 # _setup_cctx() to ensure the memory size estimate is more accurate. |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1194 try: |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1195 self._setup_cctx() |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1196 finally: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1197 self._cctx = ffi.gc(cctx, lib.ZSTD_freeCCtx, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1198 size=lib.ZSTD_sizeof_CCtx(cctx)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1199 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1200 def _setup_cctx(self): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1201 zresult = lib.ZSTD_CCtx_setParametersUsingCCtxParams(self._cctx, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1202 self._params) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1203 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1204 raise ZstdError('could not set compression parameters: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1205 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1206 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1207 dict_data = self._dict_data |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1208 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1209 if dict_data: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1210 if dict_data._cdict: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1211 zresult = lib.ZSTD_CCtx_refCDict(self._cctx, dict_data._cdict) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1212 else: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1213 zresult = lib.ZSTD_CCtx_loadDictionary_advanced( |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1214 self._cctx, dict_data.as_bytes(), len(dict_data), |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1215 lib.ZSTD_dlm_byRef, dict_data._dict_type) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1216 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1217 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1218 raise ZstdError('could not load compression dictionary: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1219 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1220 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1221 def memory_size(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1222 return lib.ZSTD_sizeof_CCtx(self._cctx) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1223 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1224 def compress(self, data): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1225 lib.ZSTD_CCtx_reset(self._cctx, lib.ZSTD_reset_session_only) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1226 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1227 data_buffer = ffi.from_buffer(data) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1228 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1229 dest_size = lib.ZSTD_compressBound(len(data_buffer)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1230 out = new_nonzero('char[]', dest_size) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1231 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1232 zresult = lib.ZSTD_CCtx_setPledgedSrcSize(self._cctx, len(data_buffer)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1233 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1234 raise ZstdError('error setting source size: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1235 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1236 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1237 out_buffer = ffi.new('ZSTD_outBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1238 in_buffer = ffi.new('ZSTD_inBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1239 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1240 out_buffer.dst = out |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1241 out_buffer.size = dest_size |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1242 out_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1243 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1244 in_buffer.src = data_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1245 in_buffer.size = len(data_buffer) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1246 in_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1247 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1248 zresult = lib.ZSTD_compressStream2(self._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1249 out_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1250 in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1251 lib.ZSTD_e_end) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1252 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1253 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1254 raise ZstdError('cannot compress: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1255 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1256 elif zresult: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1257 raise ZstdError('unexpected partial frame flush') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1258 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1259 return ffi.buffer(out, out_buffer.pos)[:] |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1260 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1261 def compressobj(self, size=-1): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1262 lib.ZSTD_CCtx_reset(self._cctx, lib.ZSTD_reset_session_only) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1263 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1264 if size < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1265 size = lib.ZSTD_CONTENTSIZE_UNKNOWN |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1266 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1267 zresult = lib.ZSTD_CCtx_setPledgedSrcSize(self._cctx, size) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1268 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1269 raise ZstdError('error setting source size: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1270 _zstd_error(zresult)) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1271 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1272 cobj = ZstdCompressionObj() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1273 cobj._out = ffi.new('ZSTD_outBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1274 cobj._dst_buffer = ffi.new('char[]', COMPRESSION_RECOMMENDED_OUTPUT_SIZE) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1275 cobj._out.dst = cobj._dst_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1276 cobj._out.size = COMPRESSION_RECOMMENDED_OUTPUT_SIZE |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1277 cobj._out.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1278 cobj._compressor = self |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1279 cobj._finished = False |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1280 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1281 return cobj |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1282 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1283 def chunker(self, size=-1, chunk_size=COMPRESSION_RECOMMENDED_OUTPUT_SIZE): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1284 lib.ZSTD_CCtx_reset(self._cctx, lib.ZSTD_reset_session_only) |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1285 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1286 if size < 0: |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1287 size = lib.ZSTD_CONTENTSIZE_UNKNOWN |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1288 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1289 zresult = lib.ZSTD_CCtx_setPledgedSrcSize(self._cctx, size) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1290 if lib.ZSTD_isError(zresult): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1291 raise ZstdError('error setting source size: %s' % |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1292 _zstd_error(zresult)) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1293 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1294 return ZstdCompressionChunker(self, chunk_size=chunk_size) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1295 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1296 def copy_stream(self, ifh, ofh, size=-1, |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1297 read_size=COMPRESSION_RECOMMENDED_INPUT_SIZE, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1298 write_size=COMPRESSION_RECOMMENDED_OUTPUT_SIZE): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1299 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1300 if not hasattr(ifh, 'read'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1301 raise ValueError('first argument must have a read() method') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1302 if not hasattr(ofh, 'write'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1303 raise ValueError('second argument must have a write() method') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1304 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1305 lib.ZSTD_CCtx_reset(self._cctx, lib.ZSTD_reset_session_only) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1306 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1307 if size < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1308 size = lib.ZSTD_CONTENTSIZE_UNKNOWN |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1309 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1310 zresult = lib.ZSTD_CCtx_setPledgedSrcSize(self._cctx, size) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1311 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1312 raise ZstdError('error setting source size: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1313 _zstd_error(zresult)) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1314 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1315 in_buffer = ffi.new('ZSTD_inBuffer *') |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1316 out_buffer = ffi.new('ZSTD_outBuffer *') |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1317 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1318 dst_buffer = ffi.new('char[]', write_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1319 out_buffer.dst = dst_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1320 out_buffer.size = write_size |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1321 out_buffer.pos = 0 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1322 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1323 total_read, total_write = 0, 0 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1324 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1325 while True: |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1326 data = ifh.read(read_size) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1327 if not data: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1328 break |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1329 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1330 data_buffer = ffi.from_buffer(data) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1331 total_read += len(data_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1332 in_buffer.src = data_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1333 in_buffer.size = len(data_buffer) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1334 in_buffer.pos = 0 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1335 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1336 while in_buffer.pos < in_buffer.size: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1337 zresult = lib.ZSTD_compressStream2(self._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1338 out_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1339 in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1340 lib.ZSTD_e_continue) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1341 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1342 raise ZstdError('zstd compress error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1343 _zstd_error(zresult)) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1344 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1345 if out_buffer.pos: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1346 ofh.write(ffi.buffer(out_buffer.dst, out_buffer.pos)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1347 total_write += out_buffer.pos |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1348 out_buffer.pos = 0 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1349 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1350 # We've finished reading. Flush the compressor. |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1351 while True: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1352 zresult = lib.ZSTD_compressStream2(self._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1353 out_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1354 in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1355 lib.ZSTD_e_end) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1356 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1357 raise ZstdError('error ending compression stream: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1358 _zstd_error(zresult)) |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1359 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1360 if out_buffer.pos: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1361 ofh.write(ffi.buffer(out_buffer.dst, out_buffer.pos)) |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1362 total_write += out_buffer.pos |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1363 out_buffer.pos = 0 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1364 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1365 if zresult == 0: |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1366 break |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1367 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1368 return total_read, total_write |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1369 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1370 def stream_reader(self, source, size=-1, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1371 read_size=COMPRESSION_RECOMMENDED_INPUT_SIZE): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1372 lib.ZSTD_CCtx_reset(self._cctx, lib.ZSTD_reset_session_only) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1373 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1374 try: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1375 size = len(source) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1376 except Exception: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1377 pass |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1378 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1379 if size < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1380 size = lib.ZSTD_CONTENTSIZE_UNKNOWN |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1381 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1382 zresult = lib.ZSTD_CCtx_setPledgedSrcSize(self._cctx, size) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1383 if lib.ZSTD_isError(zresult): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1384 raise ZstdError('error setting source size: %s' % |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1385 _zstd_error(zresult)) |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1386 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1387 return ZstdCompressionReader(self, source, read_size) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1388 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1389 def stream_writer(self, writer, size=-1, |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1390 write_size=COMPRESSION_RECOMMENDED_OUTPUT_SIZE, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1391 write_return_read=False): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1392 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1393 if not hasattr(writer, 'write'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1394 raise ValueError('must pass an object with a write() method') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1395 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1396 lib.ZSTD_CCtx_reset(self._cctx, lib.ZSTD_reset_session_only) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1397 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1398 if size < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1399 size = lib.ZSTD_CONTENTSIZE_UNKNOWN |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1400 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1401 return ZstdCompressionWriter(self, writer, size, write_size, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1402 write_return_read) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1403 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1404 write_to = stream_writer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1405 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1406 def read_to_iter(self, reader, size=-1, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1407 read_size=COMPRESSION_RECOMMENDED_INPUT_SIZE, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1408 write_size=COMPRESSION_RECOMMENDED_OUTPUT_SIZE): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1409 if hasattr(reader, 'read'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1410 have_read = True |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1411 elif hasattr(reader, '__getitem__'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1412 have_read = False |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1413 buffer_offset = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1414 size = len(reader) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1415 else: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1416 raise ValueError('must pass an object with a read() method or ' |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1417 'conforms to buffer protocol') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1418 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1419 lib.ZSTD_CCtx_reset(self._cctx, lib.ZSTD_reset_session_only) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1420 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1421 if size < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1422 size = lib.ZSTD_CONTENTSIZE_UNKNOWN |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1423 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1424 zresult = lib.ZSTD_CCtx_setPledgedSrcSize(self._cctx, size) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1425 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1426 raise ZstdError('error setting source size: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1427 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1428 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1429 in_buffer = ffi.new('ZSTD_inBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1430 out_buffer = ffi.new('ZSTD_outBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1431 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1432 in_buffer.src = ffi.NULL |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1433 in_buffer.size = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1434 in_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1435 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1436 dst_buffer = ffi.new('char[]', write_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1437 out_buffer.dst = dst_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1438 out_buffer.size = write_size |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1439 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1440 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1441 while True: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1442 # We should never have output data sitting around after a previous |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1443 # iteration. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1444 assert out_buffer.pos == 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1445 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1446 # Collect input data. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1447 if have_read: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1448 read_result = reader.read(read_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1449 else: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1450 remaining = len(reader) - buffer_offset |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1451 slice_size = min(remaining, read_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1452 read_result = reader[buffer_offset:buffer_offset + slice_size] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1453 buffer_offset += slice_size |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1454 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1455 # No new input data. Break out of the read loop. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1456 if not read_result: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1457 break |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1458 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1459 # Feed all read data into the compressor and emit output until |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1460 # exhausted. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1461 read_buffer = ffi.from_buffer(read_result) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1462 in_buffer.src = read_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1463 in_buffer.size = len(read_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1464 in_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1465 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1466 while in_buffer.pos < in_buffer.size: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1467 zresult = lib.ZSTD_compressStream2(self._cctx, out_buffer, in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1468 lib.ZSTD_e_continue) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1469 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1470 raise ZstdError('zstd compress error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1471 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1472 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1473 if out_buffer.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1474 data = ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1475 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1476 yield data |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1477 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1478 assert out_buffer.pos == 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1479 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1480 # And repeat the loop to collect more data. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1481 continue |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1482 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1483 # If we get here, input is exhausted. End the stream and emit what |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1484 # remains. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1485 while True: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1486 assert out_buffer.pos == 0 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1487 zresult = lib.ZSTD_compressStream2(self._cctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1488 out_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1489 in_buffer, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1490 lib.ZSTD_e_end) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1491 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1492 raise ZstdError('error ending compression stream: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1493 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1494 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1495 if out_buffer.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1496 data = ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1497 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1498 yield data |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1499 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1500 if zresult == 0: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1501 break |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1502 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1503 read_from = read_to_iter |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1504 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1505 def frame_progression(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1506 progression = lib.ZSTD_getFrameProgression(self._cctx) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1507 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1508 return progression.ingested, progression.consumed, progression.produced |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1509 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1510 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1511 class FrameParameters(object): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1512 def __init__(self, fparams): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1513 self.content_size = fparams.frameContentSize |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1514 self.window_size = fparams.windowSize |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1515 self.dict_id = fparams.dictID |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1516 self.has_checksum = bool(fparams.checksumFlag) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1517 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1518 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1519 def frame_content_size(data): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1520 data_buffer = ffi.from_buffer(data) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1521 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1522 size = lib.ZSTD_getFrameContentSize(data_buffer, len(data_buffer)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1523 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1524 if size == lib.ZSTD_CONTENTSIZE_ERROR: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1525 raise ZstdError('error when determining content size') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1526 elif size == lib.ZSTD_CONTENTSIZE_UNKNOWN: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1527 return -1 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1528 else: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1529 return size |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1530 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1531 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1532 def frame_header_size(data): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1533 data_buffer = ffi.from_buffer(data) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1534 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1535 zresult = lib.ZSTD_frameHeaderSize(data_buffer, len(data_buffer)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1536 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1537 raise ZstdError('could not determine frame header size: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1538 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1539 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1540 return zresult |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1541 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1542 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1543 def get_frame_parameters(data): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1544 params = ffi.new('ZSTD_frameHeader *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1545 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1546 data_buffer = ffi.from_buffer(data) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1547 zresult = lib.ZSTD_getFrameHeader(params, data_buffer, len(data_buffer)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1548 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1549 raise ZstdError('cannot get frame parameters: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1550 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1551 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1552 if zresult: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1553 raise ZstdError('not enough data for frame parameters; need %d bytes' % |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1554 zresult) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1555 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1556 return FrameParameters(params[0]) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1557 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1558 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1559 class ZstdCompressionDict(object): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1560 def __init__(self, data, dict_type=DICT_TYPE_AUTO, k=0, d=0): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1561 assert isinstance(data, bytes_type) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1562 self._data = data |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1563 self.k = k |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1564 self.d = d |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1565 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1566 if dict_type not in (DICT_TYPE_AUTO, DICT_TYPE_RAWCONTENT, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1567 DICT_TYPE_FULLDICT): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1568 raise ValueError('invalid dictionary load mode: %d; must use ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1569 'DICT_TYPE_* constants') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1570 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1571 self._dict_type = dict_type |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1572 self._cdict = None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1573 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1574 def __len__(self): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1575 return len(self._data) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1576 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1577 def dict_id(self): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1578 return int_type(lib.ZDICT_getDictID(self._data, len(self._data))) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1579 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1580 def as_bytes(self): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1581 return self._data |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1582 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1583 def precompute_compress(self, level=0, compression_params=None): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1584 if level and compression_params: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1585 raise ValueError('must only specify one of level or ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1586 'compression_params') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1587 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1588 if not level and not compression_params: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1589 raise ValueError('must specify one of level or compression_params') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1590 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1591 if level: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1592 cparams = lib.ZSTD_getCParams(level, 0, len(self._data)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1593 else: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1594 cparams = ffi.new('ZSTD_compressionParameters') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1595 cparams.chainLog = compression_params.chain_log |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1596 cparams.hashLog = compression_params.hash_log |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1597 cparams.minMatch = compression_params.min_match |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1598 cparams.searchLog = compression_params.search_log |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1599 cparams.strategy = compression_params.compression_strategy |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1600 cparams.targetLength = compression_params.target_length |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1601 cparams.windowLog = compression_params.window_log |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1602 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1603 cdict = lib.ZSTD_createCDict_advanced(self._data, len(self._data), |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1604 lib.ZSTD_dlm_byRef, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1605 self._dict_type, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1606 cparams, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1607 lib.ZSTD_defaultCMem) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1608 if cdict == ffi.NULL: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1609 raise ZstdError('unable to precompute dictionary') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1610 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1611 self._cdict = ffi.gc(cdict, lib.ZSTD_freeCDict, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1612 size=lib.ZSTD_sizeof_CDict(cdict)) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1613 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1614 @property |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1615 def _ddict(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1616 ddict = lib.ZSTD_createDDict_advanced(self._data, len(self._data), |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1617 lib.ZSTD_dlm_byRef, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1618 self._dict_type, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1619 lib.ZSTD_defaultCMem) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1620 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1621 if ddict == ffi.NULL: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1622 raise ZstdError('could not create decompression dict') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1623 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1624 ddict = ffi.gc(ddict, lib.ZSTD_freeDDict, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1625 size=lib.ZSTD_sizeof_DDict(ddict)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1626 self.__dict__['_ddict'] = ddict |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1627 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1628 return ddict |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1629 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1630 def train_dictionary(dict_size, samples, k=0, d=0, notifications=0, dict_id=0, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1631 level=0, steps=0, threads=0): |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1632 if not isinstance(samples, list): |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1633 raise TypeError('samples must be a list') |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1634 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1635 if threads < 0: |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1636 threads = _cpu_count() |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1637 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1638 total_size = sum(map(len, samples)) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1639 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1640 samples_buffer = new_nonzero('char[]', total_size) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1641 sample_sizes = new_nonzero('size_t[]', len(samples)) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1642 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1643 offset = 0 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1644 for i, sample in enumerate(samples): |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1645 if not isinstance(sample, bytes_type): |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1646 raise ValueError('samples must be bytes') |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1647 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1648 l = len(sample) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1649 ffi.memmove(samples_buffer + offset, sample, l) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1650 offset += l |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1651 sample_sizes[i] = l |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1652 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1653 dict_data = new_nonzero('char[]', dict_size) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1654 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1655 dparams = ffi.new('ZDICT_cover_params_t *')[0] |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1656 dparams.k = k |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1657 dparams.d = d |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1658 dparams.steps = steps |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1659 dparams.nbThreads = threads |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1660 dparams.zParams.notificationLevel = notifications |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1661 dparams.zParams.dictID = dict_id |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1662 dparams.zParams.compressionLevel = level |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1663 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1664 if (not dparams.k and not dparams.d and not dparams.steps |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1665 and not dparams.nbThreads and not dparams.zParams.notificationLevel |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1666 and not dparams.zParams.dictID |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1667 and not dparams.zParams.compressionLevel): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1668 zresult = lib.ZDICT_trainFromBuffer( |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1669 ffi.addressof(dict_data), dict_size, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1670 ffi.addressof(samples_buffer), |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1671 ffi.addressof(sample_sizes, 0), len(samples)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1672 elif dparams.steps or dparams.nbThreads: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1673 zresult = lib.ZDICT_optimizeTrainFromBuffer_cover( |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1674 ffi.addressof(dict_data), dict_size, |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1675 ffi.addressof(samples_buffer), |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1676 ffi.addressof(sample_sizes, 0), len(samples), |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1677 ffi.addressof(dparams)) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1678 else: |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1679 zresult = lib.ZDICT_trainFromBuffer_cover( |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1680 ffi.addressof(dict_data), dict_size, |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1681 ffi.addressof(samples_buffer), |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1682 ffi.addressof(sample_sizes, 0), len(samples), |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1683 dparams) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1684 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1685 if lib.ZDICT_isError(zresult): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1686 msg = ffi.string(lib.ZDICT_getErrorName(zresult)).decode('utf-8') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1687 raise ZstdError('cannot train dict: %s' % msg) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1688 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1689 return ZstdCompressionDict(ffi.buffer(dict_data, zresult)[:], |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1690 dict_type=DICT_TYPE_FULLDICT, |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1691 k=dparams.k, d=dparams.d) |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1692 |
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
1693 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1694 class ZstdDecompressionObj(object): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1695 def __init__(self, decompressor, write_size): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1696 self._decompressor = decompressor |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1697 self._write_size = write_size |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1698 self._finished = False |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1699 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1700 def decompress(self, data): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1701 if self._finished: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1702 raise ZstdError('cannot use a decompressobj multiple times') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1703 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1704 in_buffer = ffi.new('ZSTD_inBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1705 out_buffer = ffi.new('ZSTD_outBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1706 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1707 data_buffer = ffi.from_buffer(data) |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1708 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1709 if len(data_buffer) == 0: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1710 return b'' |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1711 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1712 in_buffer.src = data_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1713 in_buffer.size = len(data_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1714 in_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1715 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1716 dst_buffer = ffi.new('char[]', self._write_size) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1717 out_buffer.dst = dst_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1718 out_buffer.size = len(dst_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1719 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1720 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1721 chunks = [] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1722 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1723 while True: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1724 zresult = lib.ZSTD_decompressStream(self._decompressor._dctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1725 out_buffer, in_buffer) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1726 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1727 raise ZstdError('zstd decompressor error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1728 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1729 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1730 if zresult == 0: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1731 self._finished = True |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1732 self._decompressor = None |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1733 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1734 if out_buffer.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1735 chunks.append(ffi.buffer(out_buffer.dst, out_buffer.pos)[:]) |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1736 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1737 if (zresult == 0 or |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1738 (in_buffer.pos == in_buffer.size and out_buffer.pos == 0)): |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1739 break |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1740 |
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1741 out_buffer.pos = 0 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1742 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1743 return b''.join(chunks) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
1744 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1745 def flush(self, length=0): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1746 pass |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1747 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1748 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1749 class ZstdDecompressionReader(object): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1750 def __init__(self, decompressor, source, read_size, read_across_frames): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1751 self._decompressor = decompressor |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1752 self._source = source |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1753 self._read_size = read_size |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1754 self._read_across_frames = bool(read_across_frames) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1755 self._entered = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1756 self._closed = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1757 self._bytes_decompressed = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1758 self._finished_input = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1759 self._finished_output = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1760 self._in_buffer = ffi.new('ZSTD_inBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1761 # Holds a ref to self._in_buffer.src. |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1762 self._source_buffer = None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1763 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1764 def __enter__(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1765 if self._entered: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1766 raise ValueError('cannot __enter__ multiple times') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1767 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1768 self._entered = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1769 return self |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1770 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1771 def __exit__(self, exc_type, exc_value, exc_tb): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1772 self._entered = False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1773 self._closed = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1774 self._source = None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1775 self._decompressor = None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1776 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1777 return False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1778 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1779 def readable(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1780 return True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1781 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1782 def writable(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1783 return False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1784 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1785 def seekable(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1786 return True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1787 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1788 def readline(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1789 raise io.UnsupportedOperation() |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1790 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1791 def readlines(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1792 raise io.UnsupportedOperation() |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1793 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1794 def write(self, data): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1795 raise io.UnsupportedOperation() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1796 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1797 def writelines(self, lines): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1798 raise io.UnsupportedOperation() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1799 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1800 def isatty(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1801 return False |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1802 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1803 def flush(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1804 return None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1805 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1806 def close(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1807 self._closed = True |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1808 return None |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1809 |
40121
73fef626dae3
zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37495
diff
changeset
|
1810 @property |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1811 def closed(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1812 return self._closed |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1813 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1814 def tell(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1815 return self._bytes_decompressed |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1816 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1817 def readall(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1818 chunks = [] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1819 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1820 while True: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1821 chunk = self.read(1048576) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1822 if not chunk: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1823 break |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1824 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1825 chunks.append(chunk) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1826 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1827 return b''.join(chunks) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1828 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1829 def __iter__(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1830 raise io.UnsupportedOperation() |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1831 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1832 def __next__(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1833 raise io.UnsupportedOperation() |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1834 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1835 next = __next__ |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1836 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1837 def _read_input(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1838 # We have data left over in the input buffer. Use it. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1839 if self._in_buffer.pos < self._in_buffer.size: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1840 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1841 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1842 # All input data exhausted. Nothing to do. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1843 if self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1844 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1845 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1846 # Else populate the input buffer from our source. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1847 if hasattr(self._source, 'read'): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1848 data = self._source.read(self._read_size) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1849 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1850 if not data: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1851 self._finished_input = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1852 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1853 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1854 self._source_buffer = ffi.from_buffer(data) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1855 self._in_buffer.src = self._source_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1856 self._in_buffer.size = len(self._source_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1857 self._in_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1858 else: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1859 self._source_buffer = ffi.from_buffer(self._source) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1860 self._in_buffer.src = self._source_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1861 self._in_buffer.size = len(self._source_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1862 self._in_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1863 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1864 def _decompress_into_buffer(self, out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1865 """Decompress available input into an output buffer. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1866 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1867 Returns True if data in output buffer should be emitted. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1868 """ |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1869 zresult = lib.ZSTD_decompressStream(self._decompressor._dctx, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1870 out_buffer, self._in_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1871 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1872 if self._in_buffer.pos == self._in_buffer.size: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1873 self._in_buffer.src = ffi.NULL |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1874 self._in_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1875 self._in_buffer.size = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1876 self._source_buffer = None |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1877 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1878 if not hasattr(self._source, 'read'): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1879 self._finished_input = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1880 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1881 if lib.ZSTD_isError(zresult): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1882 raise ZstdError('zstd decompress error: %s' % |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1883 _zstd_error(zresult)) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1884 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1885 # Emit data if there is data AND either: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1886 # a) output buffer is full (read amount is satisfied) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1887 # b) we're at end of a frame and not in frame spanning mode |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1888 return (out_buffer.pos and |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1889 (out_buffer.pos == out_buffer.size or |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1890 zresult == 0 and not self._read_across_frames)) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1891 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1892 def read(self, size=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1893 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1894 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1895 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1896 if size < -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1897 raise ValueError('cannot read negative amounts less than -1') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1898 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1899 if size == -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1900 # This is recursive. But it gets the job done. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1901 return self.readall() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1902 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1903 if self._finished_output or size == 0: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1904 return b'' |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1905 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1906 # We /could/ call into readinto() here. But that introduces more |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1907 # overhead. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1908 dst_buffer = ffi.new('char[]', size) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1909 out_buffer = ffi.new('ZSTD_outBuffer *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1910 out_buffer.dst = dst_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1911 out_buffer.size = size |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1912 out_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1913 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1914 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1915 if self._decompress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1916 self._bytes_decompressed += out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1917 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1918 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1919 while not self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1920 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1921 if self._decompress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1922 self._bytes_decompressed += out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1923 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1924 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1925 self._bytes_decompressed += out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1926 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1927 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1928 def readinto(self, b): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1929 if self._closed: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1930 raise ValueError('stream is closed') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1931 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1932 if self._finished_output: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1933 return 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1934 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1935 # TODO use writable=True once we require CFFI >= 1.12. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1936 dest_buffer = ffi.from_buffer(b) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1937 ffi.memmove(b, b'', 0) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1938 out_buffer = ffi.new('ZSTD_outBuffer *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1939 out_buffer.dst = dest_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1940 out_buffer.size = len(dest_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1941 out_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1942 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1943 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1944 if self._decompress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1945 self._bytes_decompressed += out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1946 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1947 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1948 while not self._finished_input: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1949 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1950 if self._decompress_into_buffer(out_buffer): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1951 self._bytes_decompressed += out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1952 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1953 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1954 self._bytes_decompressed += out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1955 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1956 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1957 def read1(self, size=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1958 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1959 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1960 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1961 if size < -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1962 raise ValueError('cannot read negative amounts less than -1') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1963 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1964 if self._finished_output or size == 0: |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1965 return b'' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1966 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1967 # -1 returns arbitrary number of bytes. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1968 if size == -1: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1969 size = DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1970 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1971 dst_buffer = ffi.new('char[]', size) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1972 out_buffer = ffi.new('ZSTD_outBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1973 out_buffer.dst = dst_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1974 out_buffer.size = size |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1975 out_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1976 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1977 # read1() dictates that we can perform at most 1 call to underlying |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1978 # stream to get input. However, we can't satisfy this restriction with |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1979 # decompression because not all input generates output. So we allow |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1980 # multiple read(). But unlike read(), we stop once we have any output. |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1981 while not self._finished_input: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1982 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1983 self._decompress_into_buffer(out_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1984 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1985 if out_buffer.pos: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1986 break |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1987 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1988 self._bytes_decompressed += out_buffer.pos |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1989 return ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
1990 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1991 def readinto1(self, b): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1992 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1993 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1994 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1995 if self._finished_output: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1996 return 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1997 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1998 # TODO use writable=True once we require CFFI >= 1.12. |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
1999 dest_buffer = ffi.from_buffer(b) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2000 ffi.memmove(b, b'', 0) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2001 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2002 out_buffer = ffi.new('ZSTD_outBuffer *') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2003 out_buffer.dst = dest_buffer |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2004 out_buffer.size = len(dest_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2005 out_buffer.pos = 0 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2006 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2007 while not self._finished_input and not self._finished_output: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2008 self._read_input() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2009 self._decompress_into_buffer(out_buffer) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2010 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2011 if out_buffer.pos: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2012 break |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2013 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2014 self._bytes_decompressed += out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2015 return out_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2016 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2017 def seek(self, pos, whence=os.SEEK_SET): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2018 if self._closed: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2019 raise ValueError('stream is closed') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2020 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2021 read_amount = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2022 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2023 if whence == os.SEEK_SET: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2024 if pos < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2025 raise ValueError('cannot seek to negative position with SEEK_SET') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2026 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2027 if pos < self._bytes_decompressed: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2028 raise ValueError('cannot seek zstd decompression stream ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2029 'backwards') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2030 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2031 read_amount = pos - self._bytes_decompressed |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2032 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2033 elif whence == os.SEEK_CUR: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2034 if pos < 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2035 raise ValueError('cannot seek zstd decompression stream ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2036 'backwards') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2037 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2038 read_amount = pos |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2039 elif whence == os.SEEK_END: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2040 raise ValueError('zstd decompression streams cannot be seeked ' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2041 'with SEEK_END') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2042 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2043 while read_amount: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2044 result = self.read(min(read_amount, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2045 DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2046 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2047 if not result: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2048 break |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2049 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2050 read_amount -= len(result) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2051 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2052 return self._bytes_decompressed |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2053 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2054 class ZstdDecompressionWriter(object): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2055 def __init__(self, decompressor, writer, write_size, write_return_read): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2056 decompressor._ensure_dctx() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2057 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2058 self._decompressor = decompressor |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2059 self._writer = writer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2060 self._write_size = write_size |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2061 self._write_return_read = bool(write_return_read) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2062 self._entered = False |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2063 self._closed = False |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2064 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2065 def __enter__(self): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2066 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2067 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2068 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2069 if self._entered: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2070 raise ZstdError('cannot __enter__ multiple times') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2071 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2072 self._entered = True |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2073 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2074 return self |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2075 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2076 def __exit__(self, exc_type, exc_value, exc_tb): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2077 self._entered = False |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2078 self.close() |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2079 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2080 def memory_size(self): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2081 return lib.ZSTD_sizeof_DCtx(self._decompressor._dctx) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2082 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2083 def close(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2084 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2085 return |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2086 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2087 try: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2088 self.flush() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2089 finally: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2090 self._closed = True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2091 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2092 f = getattr(self._writer, 'close', None) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2093 if f: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2094 f() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2095 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2096 @property |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2097 def closed(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2098 return self._closed |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2099 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2100 def fileno(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2101 f = getattr(self._writer, 'fileno', None) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2102 if f: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2103 return f() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2104 else: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2105 raise OSError('fileno not available on underlying writer') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2106 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2107 def flush(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2108 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2109 raise ValueError('stream is closed') |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2110 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2111 f = getattr(self._writer, 'flush', None) |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2112 if f: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2113 return f() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2114 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2115 def isatty(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2116 return False |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2117 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2118 def readable(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2119 return False |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2120 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2121 def readline(self, size=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2122 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2123 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2124 def readlines(self, hint=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2125 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2126 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2127 def seek(self, offset, whence=None): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2128 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2129 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2130 def seekable(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2131 return False |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2132 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2133 def tell(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2134 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2135 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2136 def truncate(self, size=None): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2137 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2138 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2139 def writable(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2140 return True |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2141 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2142 def writelines(self, lines): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2143 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2144 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2145 def read(self, size=-1): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2146 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2147 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2148 def readall(self): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2149 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2150 |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2151 def readinto(self, b): |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2152 raise io.UnsupportedOperation() |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2153 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2154 def write(self, data): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2155 if self._closed: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2156 raise ValueError('stream is closed') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2157 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2158 total_write = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2159 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2160 in_buffer = ffi.new('ZSTD_inBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2161 out_buffer = ffi.new('ZSTD_outBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2162 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2163 data_buffer = ffi.from_buffer(data) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2164 in_buffer.src = data_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2165 in_buffer.size = len(data_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2166 in_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2167 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2168 dst_buffer = ffi.new('char[]', self._write_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2169 out_buffer.dst = dst_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2170 out_buffer.size = len(dst_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2171 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2172 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2173 dctx = self._decompressor._dctx |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
2174 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2175 while in_buffer.pos < in_buffer.size: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2176 zresult = lib.ZSTD_decompressStream(dctx, out_buffer, in_buffer) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2177 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2178 raise ZstdError('zstd decompress error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2179 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2180 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2181 if out_buffer.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2182 self._writer.write(ffi.buffer(out_buffer.dst, out_buffer.pos)[:]) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2183 total_write += out_buffer.pos |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2184 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2185 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2186 if self._write_return_read: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2187 return in_buffer.pos |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2188 else: |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2189 return total_write |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2190 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2191 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2192 class ZstdDecompressor(object): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2193 def __init__(self, dict_data=None, max_window_size=0, format=FORMAT_ZSTD1): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2194 self._dict_data = dict_data |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2195 self._max_window_size = max_window_size |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2196 self._format = format |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2197 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2198 dctx = lib.ZSTD_createDCtx() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2199 if dctx == ffi.NULL: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2200 raise MemoryError() |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2201 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2202 self._dctx = dctx |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2203 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2204 # Defer setting up garbage collection until full state is loaded so |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2205 # the memory size is more accurate. |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2206 try: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2207 self._ensure_dctx() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2208 finally: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2209 self._dctx = ffi.gc(dctx, lib.ZSTD_freeDCtx, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2210 size=lib.ZSTD_sizeof_DCtx(dctx)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2211 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2212 def memory_size(self): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2213 return lib.ZSTD_sizeof_DCtx(self._dctx) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2214 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2215 def decompress(self, data, max_output_size=0): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2216 self._ensure_dctx() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2217 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2218 data_buffer = ffi.from_buffer(data) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2219 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2220 output_size = lib.ZSTD_getFrameContentSize(data_buffer, len(data_buffer)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2221 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2222 if output_size == lib.ZSTD_CONTENTSIZE_ERROR: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2223 raise ZstdError('error determining content size from frame header') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2224 elif output_size == 0: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2225 return b'' |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2226 elif output_size == lib.ZSTD_CONTENTSIZE_UNKNOWN: |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2227 if not max_output_size: |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2228 raise ZstdError('could not determine content size in frame header') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2229 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2230 result_buffer = ffi.new('char[]', max_output_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2231 result_size = max_output_size |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2232 output_size = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2233 else: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2234 result_buffer = ffi.new('char[]', output_size) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2235 result_size = output_size |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2236 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2237 out_buffer = ffi.new('ZSTD_outBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2238 out_buffer.dst = result_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2239 out_buffer.size = result_size |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2240 out_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2241 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2242 in_buffer = ffi.new('ZSTD_inBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2243 in_buffer.src = data_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2244 in_buffer.size = len(data_buffer) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2245 in_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2246 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2247 zresult = lib.ZSTD_decompressStream(self._dctx, out_buffer, in_buffer) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2248 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2249 raise ZstdError('decompression error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2250 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2251 elif zresult: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2252 raise ZstdError('decompression error: did not decompress full frame') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2253 elif output_size and out_buffer.pos != output_size: |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2254 raise ZstdError('decompression error: decompressed %d bytes; expected %d' % |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2255 (zresult, output_size)) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2256 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2257 return ffi.buffer(result_buffer, out_buffer.pos)[:] |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2258 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2259 def stream_reader(self, source, read_size=DECOMPRESSION_RECOMMENDED_INPUT_SIZE, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2260 read_across_frames=False): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2261 self._ensure_dctx() |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2262 return ZstdDecompressionReader(self, source, read_size, read_across_frames) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2263 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2264 def decompressobj(self, write_size=DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2265 if write_size < 1: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2266 raise ValueError('write_size must be positive') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2267 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2268 self._ensure_dctx() |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2269 return ZstdDecompressionObj(self, write_size=write_size) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2270 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2271 def read_to_iter(self, reader, read_size=DECOMPRESSION_RECOMMENDED_INPUT_SIZE, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2272 write_size=DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2273 skip_bytes=0): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2274 if skip_bytes >= read_size: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2275 raise ValueError('skip_bytes must be smaller than read_size') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2276 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2277 if hasattr(reader, 'read'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2278 have_read = True |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2279 elif hasattr(reader, '__getitem__'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2280 have_read = False |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2281 buffer_offset = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2282 size = len(reader) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2283 else: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2284 raise ValueError('must pass an object with a read() method or ' |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2285 'conforms to buffer protocol') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2286 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2287 if skip_bytes: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2288 if have_read: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2289 reader.read(skip_bytes) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2290 else: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2291 if skip_bytes > size: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2292 raise ValueError('skip_bytes larger than first input chunk') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2293 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2294 buffer_offset = skip_bytes |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2295 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2296 self._ensure_dctx() |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2297 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2298 in_buffer = ffi.new('ZSTD_inBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2299 out_buffer = ffi.new('ZSTD_outBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2300 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2301 dst_buffer = ffi.new('char[]', write_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2302 out_buffer.dst = dst_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2303 out_buffer.size = len(dst_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2304 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2305 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2306 while True: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2307 assert out_buffer.pos == 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2308 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2309 if have_read: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2310 read_result = reader.read(read_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2311 else: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2312 remaining = size - buffer_offset |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2313 slice_size = min(remaining, read_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2314 read_result = reader[buffer_offset:buffer_offset + slice_size] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2315 buffer_offset += slice_size |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2316 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2317 # No new input. Break out of read loop. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2318 if not read_result: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2319 break |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2320 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2321 # Feed all read data into decompressor and emit output until |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2322 # exhausted. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2323 read_buffer = ffi.from_buffer(read_result) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2324 in_buffer.src = read_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2325 in_buffer.size = len(read_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2326 in_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2327 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2328 while in_buffer.pos < in_buffer.size: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2329 assert out_buffer.pos == 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2330 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2331 zresult = lib.ZSTD_decompressStream(self._dctx, out_buffer, in_buffer) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2332 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2333 raise ZstdError('zstd decompress error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2334 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2335 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2336 if out_buffer.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2337 data = ffi.buffer(out_buffer.dst, out_buffer.pos)[:] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2338 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2339 yield data |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2340 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2341 if zresult == 0: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2342 return |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2343 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2344 # Repeat loop to collect more input data. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2345 continue |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2346 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2347 # If we get here, input is exhausted. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2348 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2349 read_from = read_to_iter |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2350 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2351 def stream_writer(self, writer, write_size=DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2352 write_return_read=False): |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2353 if not hasattr(writer, 'write'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2354 raise ValueError('must pass an object with a write() method') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2355 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2356 return ZstdDecompressionWriter(self, writer, write_size, |
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2357 write_return_read) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2358 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2359 write_to = stream_writer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2360 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2361 def copy_stream(self, ifh, ofh, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2362 read_size=DECOMPRESSION_RECOMMENDED_INPUT_SIZE, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2363 write_size=DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2364 if not hasattr(ifh, 'read'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2365 raise ValueError('first argument must have a read() method') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2366 if not hasattr(ofh, 'write'): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2367 raise ValueError('second argument must have a write() method') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2368 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2369 self._ensure_dctx() |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2370 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2371 in_buffer = ffi.new('ZSTD_inBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2372 out_buffer = ffi.new('ZSTD_outBuffer *') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2373 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2374 dst_buffer = ffi.new('char[]', write_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2375 out_buffer.dst = dst_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2376 out_buffer.size = write_size |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2377 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2378 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2379 total_read, total_write = 0, 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2380 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2381 # Read all available input. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2382 while True: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2383 data = ifh.read(read_size) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2384 if not data: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2385 break |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2386 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2387 data_buffer = ffi.from_buffer(data) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2388 total_read += len(data_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2389 in_buffer.src = data_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2390 in_buffer.size = len(data_buffer) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2391 in_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2392 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2393 # Flush all read data to output. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2394 while in_buffer.pos < in_buffer.size: |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2395 zresult = lib.ZSTD_decompressStream(self._dctx, out_buffer, in_buffer) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2396 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2397 raise ZstdError('zstd decompressor error: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2398 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2399 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2400 if out_buffer.pos: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2401 ofh.write(ffi.buffer(out_buffer.dst, out_buffer.pos)) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2402 total_write += out_buffer.pos |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2403 out_buffer.pos = 0 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2404 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2405 # Continue loop to keep reading. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2406 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2407 return total_read, total_write |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2408 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2409 def decompress_content_dict_chain(self, frames): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2410 if not isinstance(frames, list): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2411 raise TypeError('argument must be a list') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2412 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2413 if not frames: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2414 raise ValueError('empty input chain') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2415 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2416 # First chunk should not be using a dictionary. We handle it specially. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2417 chunk = frames[0] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2418 if not isinstance(chunk, bytes_type): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2419 raise ValueError('chunk 0 must be bytes') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2420 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2421 # All chunks should be zstd frames and should have content size set. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2422 chunk_buffer = ffi.from_buffer(chunk) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2423 params = ffi.new('ZSTD_frameHeader *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2424 zresult = lib.ZSTD_getFrameHeader(params, chunk_buffer, len(chunk_buffer)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2425 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2426 raise ValueError('chunk 0 is not a valid zstd frame') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2427 elif zresult: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2428 raise ValueError('chunk 0 is too small to contain a zstd frame') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2429 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2430 if params.frameContentSize == lib.ZSTD_CONTENTSIZE_UNKNOWN: |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2431 raise ValueError('chunk 0 missing content size in frame') |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2432 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2433 self._ensure_dctx(load_dict=False) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2434 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2435 last_buffer = ffi.new('char[]', params.frameContentSize) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2436 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2437 out_buffer = ffi.new('ZSTD_outBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2438 out_buffer.dst = last_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2439 out_buffer.size = len(last_buffer) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2440 out_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2441 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2442 in_buffer = ffi.new('ZSTD_inBuffer *') |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2443 in_buffer.src = chunk_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2444 in_buffer.size = len(chunk_buffer) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2445 in_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2446 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2447 zresult = lib.ZSTD_decompressStream(self._dctx, out_buffer, in_buffer) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2448 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2449 raise ZstdError('could not decompress chunk 0: %s' % |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2450 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2451 elif zresult: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2452 raise ZstdError('chunk 0 did not decompress full frame') |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2453 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2454 # Special case of chain length of 1 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2455 if len(frames) == 1: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2456 return ffi.buffer(last_buffer, len(last_buffer))[:] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2457 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2458 i = 1 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2459 while i < len(frames): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2460 chunk = frames[i] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2461 if not isinstance(chunk, bytes_type): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2462 raise ValueError('chunk %d must be bytes' % i) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2463 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2464 chunk_buffer = ffi.from_buffer(chunk) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2465 zresult = lib.ZSTD_getFrameHeader(params, chunk_buffer, len(chunk_buffer)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2466 if lib.ZSTD_isError(zresult): |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2467 raise ValueError('chunk %d is not a valid zstd frame' % i) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2468 elif zresult: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2469 raise ValueError('chunk %d is too small to contain a zstd frame' % i) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2470 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2471 if params.frameContentSize == lib.ZSTD_CONTENTSIZE_UNKNOWN: |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2472 raise ValueError('chunk %d missing content size in frame' % i) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2473 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2474 dest_buffer = ffi.new('char[]', params.frameContentSize) |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2475 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2476 out_buffer.dst = dest_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2477 out_buffer.size = len(dest_buffer) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2478 out_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2479 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2480 in_buffer.src = chunk_buffer |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2481 in_buffer.size = len(chunk_buffer) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2482 in_buffer.pos = 0 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2483 |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2484 zresult = lib.ZSTD_decompressStream(self._dctx, out_buffer, in_buffer) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2485 if lib.ZSTD_isError(zresult): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2486 raise ZstdError('could not decompress chunk %d: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2487 _zstd_error(zresult)) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2488 elif zresult: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2489 raise ZstdError('chunk %d did not decompress full frame' % i) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2490 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2491 last_buffer = dest_buffer |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2492 i += 1 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2493 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2494 return ffi.buffer(last_buffer, len(last_buffer))[:] |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2495 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2496 def _ensure_dctx(self, load_dict=True): |
42070
675775c33ab6
zstandard: vendor python-zstandard 0.11
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40121
diff
changeset
|
2497 lib.ZSTD_DCtx_reset(self._dctx, lib.ZSTD_reset_session_only) |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2498 |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2499 if self._max_window_size: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2500 zresult = lib.ZSTD_DCtx_setMaxWindowSize(self._dctx, |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2501 self._max_window_size) |
31796
e0dc40530c5a
zstd: vendor python-zstandard 0.8.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30895
diff
changeset
|
2502 if lib.ZSTD_isError(zresult): |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2503 raise ZstdError('unable to set max window size: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2504 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2505 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2506 zresult = lib.ZSTD_DCtx_setFormat(self._dctx, self._format) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2507 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2508 raise ZstdError('unable to set decoding format: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2509 _zstd_error(zresult)) |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
2510 |
37495
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2511 if self._dict_data and load_dict: |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2512 zresult = lib.ZSTD_DCtx_refDDict(self._dctx, self._dict_data._ddict) |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2513 if lib.ZSTD_isError(zresult): |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2514 raise ZstdError('unable to reference prepared dictionary: %s' % |
b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31796
diff
changeset
|
2515 _zstd_error(zresult)) |