Mercurial > hg
annotate contrib/python-zstandard/c-ext/decompressor.c @ 30830:08fa3a76a080
zstd: prevent potential free() of uninitialized memory
This is a cherry pick of an upstream fix. The free() of uninitialed
memory could likely only occur if a malloc() inside zstd fails.
The patched functions aren't currently used by Mercurial. But I don't
like leaving footguns sitting around.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Tue, 17 Jan 2017 10:17:13 -0800 |
parents | b86a448a2965 |
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1 /** |
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2 * Copyright (c) 2016-present, Gregory Szorc |
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3 * All rights reserved. |
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4 * |
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5 * This software may be modified and distributed under the terms |
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6 * of the BSD license. See the LICENSE file for details. |
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7 */ |
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8 |
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9 #include "python-zstandard.h" |
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10 |
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11 extern PyObject* ZstdError; |
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12 |
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13 ZSTD_DStream* DStream_from_ZstdDecompressor(ZstdDecompressor* decompressor) { |
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14 ZSTD_DStream* dstream; |
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15 void* dictData = NULL; |
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16 size_t dictSize = 0; |
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17 size_t zresult; |
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18 |
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19 dstream = ZSTD_createDStream(); |
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20 if (!dstream) { |
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21 PyErr_SetString(ZstdError, "could not create DStream"); |
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22 return NULL; |
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23 } |
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24 |
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25 if (decompressor->dict) { |
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26 dictData = decompressor->dict->dictData; |
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27 dictSize = decompressor->dict->dictSize; |
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28 } |
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29 |
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30 if (dictData) { |
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31 zresult = ZSTD_initDStream_usingDict(dstream, dictData, dictSize); |
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32 } |
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33 else { |
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34 zresult = ZSTD_initDStream(dstream); |
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35 } |
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36 |
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37 if (ZSTD_isError(zresult)) { |
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38 PyErr_Format(ZstdError, "could not initialize DStream: %s", |
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39 ZSTD_getErrorName(zresult)); |
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40 return NULL; |
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41 } |
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42 |
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43 return dstream; |
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44 } |
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45 |
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46 PyDoc_STRVAR(Decompressor__doc__, |
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47 "ZstdDecompressor(dict_data=None)\n" |
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48 "\n" |
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49 "Create an object used to perform Zstandard decompression.\n" |
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50 "\n" |
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51 "An instance can perform multiple decompression operations." |
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52 ); |
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53 |
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54 static int Decompressor_init(ZstdDecompressor* self, PyObject* args, PyObject* kwargs) { |
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55 static char* kwlist[] = { |
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56 "dict_data", |
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57 NULL |
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58 }; |
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59 |
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60 ZstdCompressionDict* dict = NULL; |
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61 |
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62 self->refdctx = NULL; |
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63 self->dict = NULL; |
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64 self->ddict = NULL; |
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65 |
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66 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|O!", kwlist, |
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67 &ZstdCompressionDictType, &dict)) { |
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68 return -1; |
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69 } |
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70 |
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71 /* Instead of creating a ZSTD_DCtx for every decompression operation, |
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72 we create an instance at object creation time and recycle it via |
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73 ZSTD_copyDCTx() on each use. This means each use is a malloc+memcpy |
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74 instead of a malloc+init. */ |
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75 /* TODO lazily initialize the reference ZSTD_DCtx on first use since |
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76 not instances of ZstdDecompressor will use a ZSTD_DCtx. */ |
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77 self->refdctx = ZSTD_createDCtx(); |
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78 if (!self->refdctx) { |
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79 PyErr_NoMemory(); |
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80 goto except; |
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81 } |
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82 |
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83 if (dict) { |
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84 self->dict = dict; |
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85 Py_INCREF(dict); |
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86 } |
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87 |
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88 return 0; |
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89 |
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90 except: |
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91 if (self->refdctx) { |
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92 ZSTD_freeDCtx(self->refdctx); |
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93 self->refdctx = NULL; |
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94 } |
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95 |
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96 return -1; |
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97 } |
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98 |
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99 static void Decompressor_dealloc(ZstdDecompressor* self) { |
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100 if (self->refdctx) { |
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101 ZSTD_freeDCtx(self->refdctx); |
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102 } |
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103 |
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104 Py_XDECREF(self->dict); |
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105 |
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106 if (self->ddict) { |
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107 ZSTD_freeDDict(self->ddict); |
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108 self->ddict = NULL; |
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109 } |
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110 |
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111 PyObject_Del(self); |
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112 } |
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113 |
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114 PyDoc_STRVAR(Decompressor_copy_stream__doc__, |
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115 "copy_stream(ifh, ofh[, read_size=default, write_size=default]) -- decompress data between streams\n" |
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116 "\n" |
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117 "Compressed data will be read from ``ifh``, decompressed, and written to\n" |
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118 "``ofh``. ``ifh`` must have a ``read(size)`` method. ``ofh`` must have a\n" |
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119 "``write(data)`` method.\n" |
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120 "\n" |
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121 "The optional ``read_size`` and ``write_size`` arguments control the chunk\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
122 "size of data that is ``read()`` and ``write()`` between streams. They default\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
123 "to the default input and output sizes of zstd decompressor streams.\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
124 ); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
125 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
126 static PyObject* Decompressor_copy_stream(ZstdDecompressor* self, PyObject* args, PyObject* kwargs) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
127 static char* kwlist[] = { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
128 "ifh", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
129 "ofh", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
130 "read_size", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
131 "write_size", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
132 NULL |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
133 }; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
134 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
135 PyObject* source; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
136 PyObject* dest; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
137 size_t inSize = ZSTD_DStreamInSize(); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
138 size_t outSize = ZSTD_DStreamOutSize(); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
139 ZSTD_DStream* dstream; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
140 ZSTD_inBuffer input; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
141 ZSTD_outBuffer output; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
142 Py_ssize_t totalRead = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
143 Py_ssize_t totalWrite = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
144 char* readBuffer; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
145 Py_ssize_t readSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
146 PyObject* readResult; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
147 PyObject* res = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
148 size_t zresult = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
149 PyObject* writeResult; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
150 PyObject* totalReadPy; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
151 PyObject* totalWritePy; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
152 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
153 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO|kk", kwlist, &source, |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
154 &dest, &inSize, &outSize)) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
155 return NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
156 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
157 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
158 if (!PyObject_HasAttrString(source, "read")) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
159 PyErr_SetString(PyExc_ValueError, "first argument must have a read() method"); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
160 return NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
161 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
162 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
163 if (!PyObject_HasAttrString(dest, "write")) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
164 PyErr_SetString(PyExc_ValueError, "second argument must have a write() method"); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
165 return NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
166 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
167 |
30830
08fa3a76a080
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
168 /* Prevent free on uninitialized memory in finally. */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
changeset
|
169 output.dst = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
30435
diff
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|
170 |
30435
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
171 dstream = DStream_from_ZstdDecompressor(self); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
172 if (!dstream) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
173 res = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
174 goto finally; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
175 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
176 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
177 output.dst = PyMem_Malloc(outSize); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
178 if (!output.dst) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
179 PyErr_NoMemory(); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
180 res = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
181 goto finally; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
182 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
183 output.size = outSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
184 output.pos = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
185 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
186 /* Read source stream until EOF */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
187 while (1) { |
b86a448a2965
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
188 readResult = PyObject_CallMethod(source, "read", "n", inSize); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
189 if (!readResult) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
190 PyErr_SetString(ZstdError, "could not read() from source"); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
191 goto finally; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
192 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
193 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
194 PyBytes_AsStringAndSize(readResult, &readBuffer, &readSize); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
195 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
196 /* If no data was read, we're at EOF. */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
197 if (0 == readSize) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
198 break; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
199 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
200 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
201 totalRead += readSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
202 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
203 /* Send data to decompressor */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
204 input.src = readBuffer; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
205 input.size = readSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
206 input.pos = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
207 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
208 while (input.pos < input.size) { |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
209 Py_BEGIN_ALLOW_THREADS |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
210 zresult = ZSTD_decompressStream(dstream, &output, &input); |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
211 Py_END_ALLOW_THREADS |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
212 |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
213 if (ZSTD_isError(zresult)) { |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
214 PyErr_Format(ZstdError, "zstd decompressor error: %s", |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
215 ZSTD_getErrorName(zresult)); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
216 res = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
217 goto finally; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
218 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
219 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
220 if (output.pos) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
221 #if PY_MAJOR_VERSION >= 3 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
222 writeResult = PyObject_CallMethod(dest, "write", "y#", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
223 #else |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
224 writeResult = PyObject_CallMethod(dest, "write", "s#", |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
225 #endif |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
226 output.dst, output.pos); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
227 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
228 Py_XDECREF(writeResult); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
229 totalWrite += output.pos; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
230 output.pos = 0; |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
231 } |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
232 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
233 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
234 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
235 /* Source stream is exhausted. Finish up. */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
236 |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
237 ZSTD_freeDStream(dstream); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
238 dstream = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
239 |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
240 totalReadPy = PyLong_FromSsize_t(totalRead); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
241 totalWritePy = PyLong_FromSsize_t(totalWrite); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
242 res = PyTuple_Pack(2, totalReadPy, totalWritePy); |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
243 Py_DecRef(totalReadPy); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
244 Py_DecRef(totalWritePy); |
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parents:
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245 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
246 finally: |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
247 if (output.dst) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
248 PyMem_Free(output.dst); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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249 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
250 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
251 if (dstream) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
252 ZSTD_freeDStream(dstream); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
253 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
254 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
255 return res; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
256 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
257 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
258 PyDoc_STRVAR(Decompressor_decompress__doc__, |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
259 "decompress(data[, max_output_size=None]) -- Decompress data in its entirety\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
260 "\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
261 "This method will decompress the entirety of the argument and return the\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
262 "result.\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
263 "\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
264 "The input bytes are expected to contain a full Zstandard frame (something\n" |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
265 "compressed with ``ZstdCompressor.compress()`` or similar). If the input does\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
266 "not contain a full frame, an exception will be raised.\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
267 "\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
268 "If the frame header of the compressed data does not contain the content size\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
269 "``max_output_size`` must be specified or ``ZstdError`` will be raised. An\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
270 "allocation of size ``max_output_size`` will be performed and an attempt will\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
271 "be made to perform decompression into that buffer. If the buffer is too\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
272 "small or cannot be allocated, ``ZstdError`` will be raised. The buffer will\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
273 "be resized if it is too large.\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
274 "\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
275 "Uncompressed data could be much larger than compressed data. As a result,\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
276 "calling this function could result in a very large memory allocation being\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
277 "performed to hold the uncompressed data. Therefore it is **highly**\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
278 "recommended to use a streaming decompression method instead of this one.\n" |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
279 ); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
280 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
281 PyObject* Decompressor_decompress(ZstdDecompressor* self, PyObject* args, PyObject* kwargs) { |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
282 static char* kwlist[] = { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
283 "data", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
284 "max_output_size", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
285 NULL |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
286 }; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
287 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
288 const char* source; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
289 Py_ssize_t sourceSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
290 Py_ssize_t maxOutputSize = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
291 unsigned long long decompressedSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
292 size_t destCapacity; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
293 PyObject* result = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
294 ZSTD_DCtx* dctx = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
295 void* dictData = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
296 size_t dictSize = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
297 size_t zresult; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
298 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
299 #if PY_MAJOR_VERSION >= 3 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
300 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y#|n", kwlist, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
301 #else |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
302 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|n", kwlist, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
303 #endif |
b86a448a2965
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
304 &source, &sourceSize, &maxOutputSize)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
305 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
306 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
307 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
308 dctx = PyMem_Malloc(ZSTD_sizeof_DCtx(self->refdctx)); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
309 if (!dctx) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
310 PyErr_NoMemory(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
311 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
312 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
313 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
314 ZSTD_copyDCtx(dctx, self->refdctx); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
315 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
316 if (self->dict) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
317 dictData = self->dict->dictData; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
318 dictSize = self->dict->dictSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
319 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
320 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
321 if (dictData && !self->ddict) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
322 Py_BEGIN_ALLOW_THREADS |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
323 self->ddict = ZSTD_createDDict(dictData, dictSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
324 Py_END_ALLOW_THREADS |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
325 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
326 if (!self->ddict) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
327 PyErr_SetString(ZstdError, "could not create decompression dict"); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
328 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
329 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
330 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
331 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
332 decompressedSize = ZSTD_getDecompressedSize(source, sourceSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
333 /* 0 returned if content size not in the zstd frame header */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
334 if (0 == decompressedSize) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
335 if (0 == maxOutputSize) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
336 PyErr_SetString(ZstdError, "input data invalid or missing content size " |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
337 "in frame header"); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
338 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
339 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
340 else { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
341 result = PyBytes_FromStringAndSize(NULL, maxOutputSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
342 destCapacity = maxOutputSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
343 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
344 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
345 else { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
346 result = PyBytes_FromStringAndSize(NULL, decompressedSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
347 destCapacity = decompressedSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
348 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
349 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
350 if (!result) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
351 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
352 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
353 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
354 Py_BEGIN_ALLOW_THREADS |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
355 if (self->ddict) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
356 zresult = ZSTD_decompress_usingDDict(dctx, PyBytes_AsString(result), destCapacity, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
357 source, sourceSize, self->ddict); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
358 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
359 else { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
360 zresult = ZSTD_decompressDCtx(dctx, PyBytes_AsString(result), destCapacity, source, sourceSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
361 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
362 Py_END_ALLOW_THREADS |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
363 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
364 if (ZSTD_isError(zresult)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
365 PyErr_Format(ZstdError, "decompression error: %s", ZSTD_getErrorName(zresult)); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
366 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
367 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
368 else if (decompressedSize && zresult != decompressedSize) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
369 PyErr_Format(ZstdError, "decompression error: decompressed %zu bytes; expected %llu", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
370 zresult, decompressedSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
371 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
372 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
373 else if (zresult < destCapacity) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
374 if (_PyBytes_Resize(&result, zresult)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
375 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
376 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
377 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
378 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
379 goto finally; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
380 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
381 except: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
382 Py_DecRef(result); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
383 result = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
384 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
385 finally: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
386 if (dctx) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
387 PyMem_FREE(dctx); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
388 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
389 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
390 return result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
391 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
392 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
393 PyDoc_STRVAR(Decompressor_decompressobj__doc__, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
394 "decompressobj()\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
395 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
396 "Incrementally feed data into a decompressor.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
397 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
398 "The returned object exposes a ``decompress(data)`` method. This makes it\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
399 "compatible with ``zlib.decompressobj`` and ``bz2.BZ2Decompressor`` so that\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
400 "callers can swap in the zstd decompressor while using the same API.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
401 ); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
402 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
403 static ZstdDecompressionObj* Decompressor_decompressobj(ZstdDecompressor* self) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
404 ZstdDecompressionObj* result = PyObject_New(ZstdDecompressionObj, &ZstdDecompressionObjType); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
405 if (!result) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
406 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
407 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
408 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
409 result->dstream = DStream_from_ZstdDecompressor(self); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
410 if (!result->dstream) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
411 Py_DecRef((PyObject*)result); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
412 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
413 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
414 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
415 result->decompressor = self; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
416 Py_INCREF(result->decompressor); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
417 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
418 result->finished = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
419 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
420 return result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
421 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
422 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
423 PyDoc_STRVAR(Decompressor_read_from__doc__, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
424 "read_from(reader[, read_size=default, write_size=default, skip_bytes=0])\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
425 "Read compressed data and return an iterator\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
426 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
427 "Returns an iterator of decompressed data chunks produced from reading from\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
428 "the ``reader``.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
429 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
430 "Compressed data will be obtained from ``reader`` by calling the\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
431 "``read(size)`` method of it. The source data will be streamed into a\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
432 "decompressor. As decompressed data is available, it will be exposed to the\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
433 "returned iterator.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
434 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
435 "Data is ``read()`` in chunks of size ``read_size`` and exposed to the\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
436 "iterator in chunks of size ``write_size``. The default values are the input\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
437 "and output sizes for a zstd streaming decompressor.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
438 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
439 "There is also support for skipping the first ``skip_bytes`` of data from\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
440 "the source.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
441 ); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
442 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
443 static ZstdDecompressorIterator* Decompressor_read_from(ZstdDecompressor* self, PyObject* args, PyObject* kwargs) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
444 static char* kwlist[] = { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
445 "reader", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
446 "read_size", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
447 "write_size", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
448 "skip_bytes", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
449 NULL |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
450 }; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
451 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
452 PyObject* reader; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
453 size_t inSize = ZSTD_DStreamInSize(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
454 size_t outSize = ZSTD_DStreamOutSize(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
455 ZstdDecompressorIterator* result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
456 size_t skipBytes = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
457 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
458 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|kkk", kwlist, &reader, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
459 &inSize, &outSize, &skipBytes)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
460 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
461 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
462 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
463 if (skipBytes >= inSize) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
464 PyErr_SetString(PyExc_ValueError, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
465 "skip_bytes must be smaller than read_size"); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
466 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
467 } |
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 result = PyObject_New(ZstdDecompressorIterator, &ZstdDecompressorIteratorType); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
470 if (!result) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
471 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
472 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
473 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
474 result->decompressor = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
475 result->reader = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
476 result->buffer = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
477 result->dstream = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
478 result->input.src = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
479 result->output.dst = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
480 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
481 if (PyObject_HasAttrString(reader, "read")) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
482 result->reader = reader; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
483 Py_INCREF(result->reader); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
484 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
485 else if (1 == PyObject_CheckBuffer(reader)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
486 /* Object claims it is a buffer. Try to get a handle to it. */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
487 result->buffer = PyMem_Malloc(sizeof(Py_buffer)); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
488 if (!result->buffer) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
489 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
490 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
491 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
492 memset(result->buffer, 0, sizeof(Py_buffer)); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
493 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
494 if (0 != PyObject_GetBuffer(reader, result->buffer, PyBUF_CONTIG_RO)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
495 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
496 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
497 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
498 result->bufferOffset = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
499 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
500 else { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
501 PyErr_SetString(PyExc_ValueError, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
502 "must pass an object with a read() method or conforms to buffer protocol"); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
503 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
504 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
505 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
506 result->decompressor = self; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
507 Py_INCREF(result->decompressor); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
508 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
509 result->inSize = inSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
510 result->outSize = outSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
511 result->skipBytes = skipBytes; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
512 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
513 result->dstream = DStream_from_ZstdDecompressor(self); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
514 if (!result->dstream) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
515 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
516 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
517 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
518 result->input.src = PyMem_Malloc(inSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
519 if (!result->input.src) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
520 PyErr_NoMemory(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
521 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
522 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
523 result->input.size = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
524 result->input.pos = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
525 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
526 result->output.dst = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
527 result->output.size = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
528 result->output.pos = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
529 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
530 result->readCount = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
531 result->finishedInput = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
532 result->finishedOutput = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
533 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
534 goto finally; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
535 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
536 except: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
537 if (result->reader) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
538 Py_DECREF(result->reader); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
539 result->reader = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
540 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
541 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
542 if (result->buffer) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
543 PyBuffer_Release(result->buffer); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
544 Py_DECREF(result->buffer); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
545 result->buffer = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
546 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
547 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
548 Py_DECREF(result); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
549 result = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
550 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
551 finally: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
552 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
553 return result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
554 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
555 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
556 PyDoc_STRVAR(Decompressor_write_to__doc__, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
557 "Create a context manager to write decompressed data to an object.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
558 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
559 "The passed object must have a ``write()`` method.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
560 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
561 "The caller feeds intput data to the object by calling ``write(data)``.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
562 "Decompressed data is written to the argument given as it is decompressed.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
563 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
564 "An optional ``write_size`` argument defines the size of chunks to\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
565 "``write()`` to the writer. It defaults to the default output size for a zstd\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
566 "streaming decompressor.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
567 ); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
568 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
569 static ZstdDecompressionWriter* Decompressor_write_to(ZstdDecompressor* self, PyObject* args, PyObject* kwargs) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
570 static char* kwlist[] = { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
571 "writer", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
572 "write_size", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
573 NULL |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
574 }; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
575 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
576 PyObject* writer; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
577 size_t outSize = ZSTD_DStreamOutSize(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
578 ZstdDecompressionWriter* result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
579 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
580 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|k", kwlist, &writer, &outSize)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
581 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
582 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
583 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
584 if (!PyObject_HasAttrString(writer, "write")) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
585 PyErr_SetString(PyExc_ValueError, "must pass an object with a write() method"); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
586 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
587 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
588 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
589 result = PyObject_New(ZstdDecompressionWriter, &ZstdDecompressionWriterType); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
590 if (!result) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
591 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
592 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
593 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
594 result->decompressor = self; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
595 Py_INCREF(result->decompressor); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
596 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
597 result->writer = writer; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
598 Py_INCREF(result->writer); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
599 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
600 result->outSize = outSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
601 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
602 result->entered = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
603 result->dstream = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
604 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
605 return result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
606 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
607 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
608 static PyMethodDef Decompressor_methods[] = { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
609 { "copy_stream", (PyCFunction)Decompressor_copy_stream, METH_VARARGS | METH_KEYWORDS, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
610 Decompressor_copy_stream__doc__ }, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
611 { "decompress", (PyCFunction)Decompressor_decompress, METH_VARARGS | METH_KEYWORDS, |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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612 Decompressor_decompress__doc__ }, |
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parents:
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613 { "decompressobj", (PyCFunction)Decompressor_decompressobj, METH_NOARGS, |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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614 Decompressor_decompressobj__doc__ }, |
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parents:
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615 { "read_from", (PyCFunction)Decompressor_read_from, METH_VARARGS | METH_KEYWORDS, |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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616 Decompressor_read_from__doc__ }, |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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617 { "write_to", (PyCFunction)Decompressor_write_to, METH_VARARGS | METH_KEYWORDS, |
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parents:
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618 Decompressor_write_to__doc__ }, |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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619 { NULL, NULL } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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620 }; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
621 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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622 PyTypeObject ZstdDecompressorType = { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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623 PyVarObject_HEAD_INIT(NULL, 0) |
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624 "zstd.ZstdDecompressor", /* tp_name */ |
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parents:
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625 sizeof(ZstdDecompressor), /* tp_basicsize */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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626 0, /* tp_itemsize */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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627 (destructor)Decompressor_dealloc, /* tp_dealloc */ |
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parents:
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628 0, /* tp_print */ |
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parents:
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|
629 0, /* tp_getattr */ |
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parents:
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630 0, /* tp_setattr */ |
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parents:
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|
631 0, /* tp_compare */ |
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parents:
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|
632 0, /* tp_repr */ |
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parents:
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633 0, /* tp_as_number */ |
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parents:
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634 0, /* tp_as_sequence */ |
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parents:
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635 0, /* tp_as_mapping */ |
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parents:
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636 0, /* tp_hash */ |
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parents:
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|
637 0, /* tp_call */ |
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parents:
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|
638 0, /* tp_str */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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639 0, /* tp_getattro */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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640 0, /* tp_setattro */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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641 0, /* tp_as_buffer */ |
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parents:
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642 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
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parents:
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643 Decompressor__doc__, /* tp_doc */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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644 0, /* tp_traverse */ |
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parents:
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645 0, /* tp_clear */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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646 0, /* tp_richcompare */ |
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parents:
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|
647 0, /* tp_weaklistoffset */ |
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parents:
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|
648 0, /* tp_iter */ |
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parents:
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|
649 0, /* tp_iternext */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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650 Decompressor_methods, /* tp_methods */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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651 0, /* tp_members */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
652 0, /* tp_getset */ |
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parents:
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|
653 0, /* tp_base */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
654 0, /* tp_dict */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
655 0, /* tp_descr_get */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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656 0, /* tp_descr_set */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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657 0, /* tp_dictoffset */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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658 (initproc)Decompressor_init, /* tp_init */ |
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parents:
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|
659 0, /* tp_alloc */ |
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parents:
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|
660 PyType_GenericNew, /* tp_new */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
661 }; |
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parents:
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|
662 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
663 void decompressor_module_init(PyObject* mod) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
664 Py_TYPE(&ZstdDecompressorType) = &PyType_Type; |
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parents:
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665 if (PyType_Ready(&ZstdDecompressorType) < 0) { |
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666 return; |
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parents:
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|
667 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
668 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
669 Py_INCREF((PyObject*)&ZstdDecompressorType); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
670 PyModule_AddObject(mod, "ZstdDecompressor", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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671 (PyObject*)&ZstdDecompressorType); |
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parents:
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672 } |