Mercurial > hg
annotate contrib/python-zstandard/c-ext/decompressor.c @ 31266:8089de5fab89
dispatch: add pagination of two more help cases
I missed these in the last round anf Yuya spotted them in
review. Thanks!
author | Augie Fackler <augie@google.com> |
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date | Wed, 08 Mar 2017 18:32:42 -0500 |
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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->dctx = 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!:ZstdDecompressor", 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 /* TODO lazily initialize the reference ZSTD_DCtx on first use since |
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72 not instances of ZstdDecompressor will use a ZSTD_DCtx. */ |
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73 self->dctx = ZSTD_createDCtx(); |
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74 if (!self->dctx) { |
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75 PyErr_NoMemory(); |
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76 goto except; |
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77 } |
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78 |
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79 if (dict) { |
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80 self->dict = dict; |
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81 Py_INCREF(dict); |
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82 } |
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83 |
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84 return 0; |
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85 |
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86 except: |
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87 if (self->dctx) { |
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88 ZSTD_freeDCtx(self->dctx); |
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89 self->dctx = NULL; |
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90 } |
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91 |
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92 return -1; |
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93 } |
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94 |
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95 static void Decompressor_dealloc(ZstdDecompressor* self) { |
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96 if (self->dctx) { |
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97 ZSTD_freeDCtx(self->dctx); |
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98 } |
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99 |
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100 Py_XDECREF(self->dict); |
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101 |
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102 if (self->ddict) { |
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103 ZSTD_freeDDict(self->ddict); |
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104 self->ddict = NULL; |
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105 } |
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106 |
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107 PyObject_Del(self); |
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108 } |
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109 |
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110 PyDoc_STRVAR(Decompressor_copy_stream__doc__, |
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111 "copy_stream(ifh, ofh[, read_size=default, write_size=default]) -- decompress data between streams\n" |
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112 "\n" |
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113 "Compressed data will be read from ``ifh``, decompressed, and written to\n" |
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114 "``ofh``. ``ifh`` must have a ``read(size)`` method. ``ofh`` must have a\n" |
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115 "``write(data)`` method.\n" |
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116 "\n" |
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117 "The optional ``read_size`` and ``write_size`` arguments control the chunk\n" |
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118 "size of data that is ``read()`` and ``write()`` between streams. They default\n" |
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119 "to the default input and output sizes of zstd decompressor streams.\n" |
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120 ); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
121 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
122 static PyObject* Decompressor_copy_stream(ZstdDecompressor* self, PyObject* args, PyObject* kwargs) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
123 static char* kwlist[] = { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
124 "ifh", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
125 "ofh", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
126 "read_size", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
127 "write_size", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
128 NULL |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
129 }; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
130 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
131 PyObject* source; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
132 PyObject* dest; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
133 size_t inSize = ZSTD_DStreamInSize(); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
134 size_t outSize = ZSTD_DStreamOutSize(); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
135 ZSTD_DStream* dstream; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
136 ZSTD_inBuffer input; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
137 ZSTD_outBuffer output; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
138 Py_ssize_t totalRead = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
139 Py_ssize_t totalWrite = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
140 char* readBuffer; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
141 Py_ssize_t readSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
142 PyObject* readResult; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
143 PyObject* res = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
144 size_t zresult = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
145 PyObject* writeResult; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
146 PyObject* totalReadPy; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
147 PyObject* totalWritePy; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
148 |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
149 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO|kk:copy_stream", kwlist, |
c32454d69b85
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Gregory Szorc <gregory.szorc@gmail.com>
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|
150 &source, &dest, &inSize, &outSize)) { |
30435
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
151 return NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
152 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
153 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
154 if (!PyObject_HasAttrString(source, "read")) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
155 PyErr_SetString(PyExc_ValueError, "first argument must have a read() method"); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
156 return NULL; |
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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 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
159 if (!PyObject_HasAttrString(dest, "write")) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
160 PyErr_SetString(PyExc_ValueError, "second argument must have a write() method"); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
161 return NULL; |
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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 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
164 /* Prevent free on uninitialized memory in finally. */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
165 output.dst = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
166 |
30435
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
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|
167 dstream = DStream_from_ZstdDecompressor(self); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
168 if (!dstream) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
169 res = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
170 goto finally; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
171 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
172 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
173 output.dst = PyMem_Malloc(outSize); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
174 if (!output.dst) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
175 PyErr_NoMemory(); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
176 res = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
177 goto finally; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
178 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
179 output.size = outSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
180 output.pos = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
181 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
182 /* Read source stream until EOF */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
183 while (1) { |
b86a448a2965
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
184 readResult = PyObject_CallMethod(source, "read", "n", inSize); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
185 if (!readResult) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
186 PyErr_SetString(ZstdError, "could not read() from source"); |
b86a448a2965
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
187 goto finally; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
188 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
189 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
190 PyBytes_AsStringAndSize(readResult, &readBuffer, &readSize); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
191 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
192 /* If no data was read, we're at EOF. */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
193 if (0 == readSize) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
194 break; |
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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 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
197 totalRead += readSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
198 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
199 /* Send data to decompressor */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
200 input.src = readBuffer; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
201 input.size = readSize; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
202 input.pos = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
203 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
204 while (input.pos < input.size) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
205 Py_BEGIN_ALLOW_THREADS |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
206 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
|
207 Py_END_ALLOW_THREADS |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
208 |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
209 if (ZSTD_isError(zresult)) { |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
210 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
|
211 ZSTD_getErrorName(zresult)); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
212 res = NULL; |
b86a448a2965
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
213 goto finally; |
b86a448a2965
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
214 } |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
215 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
216 if (output.pos) { |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
217 #if PY_MAJOR_VERSION >= 3 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
218 writeResult = PyObject_CallMethod(dest, "write", "y#", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
219 #else |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
220 writeResult = PyObject_CallMethod(dest, "write", "s#", |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
221 #endif |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
222 output.dst, output.pos); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
223 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
224 Py_XDECREF(writeResult); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
225 totalWrite += output.pos; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
226 output.pos = 0; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
227 } |
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
228 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
229 } |
b86a448a2965
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
230 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
231 /* Source stream is exhausted. Finish up. */ |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
232 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
233 ZSTD_freeDStream(dstream); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
234 dstream = NULL; |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
235 |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
236 totalReadPy = PyLong_FromSsize_t(totalRead); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
237 totalWritePy = PyLong_FromSsize_t(totalWrite); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
238 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
|
239 Py_DecRef(totalReadPy); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
240 Py_DecRef(totalWritePy); |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
241 |
30895
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zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
242 finally: |
30435
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zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
243 if (output.dst) { |
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244 PyMem_Free(output.dst); |
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245 } |
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246 |
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247 if (dstream) { |
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248 ZSTD_freeDStream(dstream); |
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249 } |
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250 |
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251 return res; |
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252 } |
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253 |
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254 PyDoc_STRVAR(Decompressor_decompress__doc__, |
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255 "decompress(data[, max_output_size=None]) -- Decompress data in its entirety\n" |
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256 "\n" |
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257 "This method will decompress the entirety of the argument and return the\n" |
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258 "result.\n" |
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259 "\n" |
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260 "The input bytes are expected to contain a full Zstandard frame (something\n" |
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261 "compressed with ``ZstdCompressor.compress()`` or similar). If the input does\n" |
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262 "not contain a full frame, an exception will be raised.\n" |
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263 "\n" |
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264 "If the frame header of the compressed data does not contain the content size\n" |
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265 "``max_output_size`` must be specified or ``ZstdError`` will be raised. An\n" |
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266 "allocation of size ``max_output_size`` will be performed and an attempt will\n" |
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267 "be made to perform decompression into that buffer. If the buffer is too\n" |
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268 "small or cannot be allocated, ``ZstdError`` will be raised. The buffer will\n" |
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269 "be resized if it is too large.\n" |
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270 "\n" |
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271 "Uncompressed data could be much larger than compressed data. As a result,\n" |
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272 "calling this function could result in a very large memory allocation being\n" |
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273 "performed to hold the uncompressed data. Therefore it is **highly**\n" |
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274 "recommended to use a streaming decompression method instead of this one.\n" |
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275 ); |
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276 |
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277 PyObject* Decompressor_decompress(ZstdDecompressor* self, PyObject* args, PyObject* kwargs) { |
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278 static char* kwlist[] = { |
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279 "data", |
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280 "max_output_size", |
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281 NULL |
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282 }; |
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283 |
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284 const char* source; |
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285 Py_ssize_t sourceSize; |
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286 Py_ssize_t maxOutputSize = 0; |
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287 unsigned long long decompressedSize; |
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288 size_t destCapacity; |
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289 PyObject* result = NULL; |
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290 void* dictData = NULL; |
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291 size_t dictSize = 0; |
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292 size_t zresult; |
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293 |
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294 #if PY_MAJOR_VERSION >= 3 |
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295 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y#|n:decompress", |
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296 #else |
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297 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|n:decompress", |
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298 #endif |
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299 kwlist, &source, &sourceSize, &maxOutputSize)) { |
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300 return NULL; |
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301 } |
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302 |
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303 if (self->dict) { |
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304 dictData = self->dict->dictData; |
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305 dictSize = self->dict->dictSize; |
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306 } |
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307 |
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308 if (dictData && !self->ddict) { |
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|
309 Py_BEGIN_ALLOW_THREADS |
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310 self->ddict = ZSTD_createDDict_byReference(dictData, dictSize); |
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311 Py_END_ALLOW_THREADS |
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312 |
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313 if (!self->ddict) { |
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314 PyErr_SetString(ZstdError, "could not create decompression dict"); |
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315 return NULL; |
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|
316 } |
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317 } |
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318 |
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319 decompressedSize = ZSTD_getDecompressedSize(source, sourceSize); |
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320 /* 0 returned if content size not in the zstd frame header */ |
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|
321 if (0 == decompressedSize) { |
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322 if (0 == maxOutputSize) { |
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|
323 PyErr_SetString(ZstdError, "input data invalid or missing content size " |
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324 "in frame header"); |
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325 return NULL; |
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326 } |
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327 else { |
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328 result = PyBytes_FromStringAndSize(NULL, maxOutputSize); |
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329 destCapacity = maxOutputSize; |
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330 } |
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|
331 } |
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332 else { |
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333 result = PyBytes_FromStringAndSize(NULL, decompressedSize); |
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334 destCapacity = decompressedSize; |
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335 } |
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336 |
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337 if (!result) { |
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338 return NULL; |
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339 } |
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340 |
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341 Py_BEGIN_ALLOW_THREADS |
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342 if (self->ddict) { |
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343 zresult = ZSTD_decompress_usingDDict(self->dctx, |
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344 PyBytes_AsString(result), destCapacity, |
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345 source, sourceSize, self->ddict); |
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346 } |
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347 else { |
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348 zresult = ZSTD_decompressDCtx(self->dctx, |
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349 PyBytes_AsString(result), destCapacity, source, sourceSize); |
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350 } |
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|
351 Py_END_ALLOW_THREADS |
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352 |
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353 if (ZSTD_isError(zresult)) { |
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|
354 PyErr_Format(ZstdError, "decompression error: %s", ZSTD_getErrorName(zresult)); |
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355 Py_DecRef(result); |
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356 return NULL; |
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357 } |
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358 else if (decompressedSize && zresult != decompressedSize) { |
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359 PyErr_Format(ZstdError, "decompression error: decompressed %zu bytes; expected %llu", |
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360 zresult, decompressedSize); |
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361 Py_DecRef(result); |
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362 return NULL; |
30435
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 else if (zresult < destCapacity) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
365 if (_PyBytes_Resize(&result, zresult)) { |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
366 Py_DecRef(result); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
367 return NULL; |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
368 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
369 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
370 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
371 return result; |
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 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
374 PyDoc_STRVAR(Decompressor_decompressobj__doc__, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
375 "decompressobj()\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
376 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
377 "Incrementally feed data into a decompressor.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
378 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
379 "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
|
380 "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
|
381 "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
|
382 ); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
383 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
384 static ZstdDecompressionObj* Decompressor_decompressobj(ZstdDecompressor* self) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
385 ZstdDecompressionObj* result = PyObject_New(ZstdDecompressionObj, &ZstdDecompressionObjType); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
386 if (!result) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
387 return NULL; |
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 result->dstream = DStream_from_ZstdDecompressor(self); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
391 if (!result->dstream) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
392 Py_DecRef((PyObject*)result); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
393 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
394 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
395 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
396 result->decompressor = self; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
397 Py_INCREF(result->decompressor); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
398 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
399 result->finished = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
400 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
401 return result; |
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 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
404 PyDoc_STRVAR(Decompressor_read_from__doc__, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
405 "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
|
406 "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
|
407 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
408 "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
|
409 "the ``reader``.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
410 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
411 "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
|
412 "``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
|
413 "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
|
414 "returned iterator.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
415 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
416 "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
|
417 "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
|
418 "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
|
419 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
420 "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
|
421 "the source.\n" |
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 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
424 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
|
425 static char* kwlist[] = { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
426 "reader", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
427 "read_size", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
428 "write_size", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
429 "skip_bytes", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
430 NULL |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
431 }; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
432 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
433 PyObject* reader; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
434 size_t inSize = ZSTD_DStreamInSize(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
435 size_t outSize = ZSTD_DStreamOutSize(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
436 ZstdDecompressorIterator* result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
437 size_t skipBytes = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
438 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
439 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|kkk:read_from", kwlist, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
440 &reader, &inSize, &outSize, &skipBytes)) { |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
441 return NULL; |
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 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
444 if (skipBytes >= inSize) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
445 PyErr_SetString(PyExc_ValueError, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
446 "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
|
447 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
448 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
449 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
450 result = PyObject_New(ZstdDecompressorIterator, &ZstdDecompressorIteratorType); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
451 if (!result) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
452 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
453 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
454 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
455 result->decompressor = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
456 result->reader = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
457 result->buffer = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
458 result->dstream = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
459 result->input.src = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
460 result->output.dst = 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 if (PyObject_HasAttrString(reader, "read")) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
463 result->reader = reader; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
464 Py_INCREF(result->reader); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
465 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
466 else if (1 == PyObject_CheckBuffer(reader)) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
467 /* 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
|
468 result->buffer = PyMem_Malloc(sizeof(Py_buffer)); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
469 if (!result->buffer) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
470 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
471 } |
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 memset(result->buffer, 0, sizeof(Py_buffer)); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
474 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
475 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
|
476 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
477 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
478 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
479 result->bufferOffset = 0; |
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 else { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
482 PyErr_SetString(PyExc_ValueError, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
483 "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
|
484 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
485 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
486 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
487 result->decompressor = self; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
488 Py_INCREF(result->decompressor); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
489 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
490 result->inSize = inSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
491 result->outSize = outSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
492 result->skipBytes = skipBytes; |
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 result->dstream = DStream_from_ZstdDecompressor(self); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
495 if (!result->dstream) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
496 goto except; |
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 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
499 result->input.src = PyMem_Malloc(inSize); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
500 if (!result->input.src) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
501 PyErr_NoMemory(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
502 goto except; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
503 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
504 result->input.size = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
505 result->input.pos = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
506 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
507 result->output.dst = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
508 result->output.size = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
509 result->output.pos = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
510 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
511 result->readCount = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
512 result->finishedInput = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
513 result->finishedOutput = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
514 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
515 goto finally; |
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 except: |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
518 Py_CLEAR(result->reader); |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
519 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
520 if (result->buffer) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
521 PyBuffer_Release(result->buffer); |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
522 Py_CLEAR(result->buffer); |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
523 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
524 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
525 Py_CLEAR(result); |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
526 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
527 finally: |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
528 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
529 return result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
530 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
531 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
532 PyDoc_STRVAR(Decompressor_write_to__doc__, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
533 "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
|
534 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
535 "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
|
536 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
537 "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
|
538 "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
|
539 "\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
540 "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
|
541 "``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
|
542 "streaming decompressor.\n" |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
543 ); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
544 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
545 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
|
546 static char* kwlist[] = { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
547 "writer", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
548 "write_size", |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
549 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 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
552 PyObject* writer; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
553 size_t outSize = ZSTD_DStreamOutSize(); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
554 ZstdDecompressionWriter* result; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
555 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
556 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|k:write_to", kwlist, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
557 &writer, &outSize)) { |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
558 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
559 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
560 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
561 if (!PyObject_HasAttrString(writer, "write")) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
562 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
|
563 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
564 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
565 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
566 result = PyObject_New(ZstdDecompressionWriter, &ZstdDecompressionWriterType); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
567 if (!result) { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
568 return NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
569 } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
570 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
571 result->decompressor = self; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
572 Py_INCREF(result->decompressor); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
573 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
574 result->writer = writer; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
575 Py_INCREF(result->writer); |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
576 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
577 result->outSize = outSize; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
578 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
579 result->entered = 0; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
580 result->dstream = NULL; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
581 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
582 return result; |
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 |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
585 PyDoc_STRVAR(Decompressor_decompress_content_dict_chain__doc__, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
586 "Decompress a series of chunks using the content dictionary chaining technique\n" |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
587 ); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
588 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
589 static PyObject* Decompressor_decompress_content_dict_chain(PyObject* self, PyObject* args, PyObject* kwargs) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
590 static char* kwlist[] = { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
591 "frames", |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
592 NULL |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
593 }; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
594 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
595 PyObject* chunks; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
596 Py_ssize_t chunksLen; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
597 Py_ssize_t chunkIndex; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
598 char parity = 0; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
599 PyObject* chunk; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
600 char* chunkData; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
601 Py_ssize_t chunkSize; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
602 ZSTD_DCtx* dctx = NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
603 size_t zresult; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
604 ZSTD_frameParams frameParams; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
605 void* buffer1 = NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
606 size_t buffer1Size = 0; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
607 size_t buffer1ContentSize = 0; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
608 void* buffer2 = NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
609 size_t buffer2Size = 0; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
610 size_t buffer2ContentSize = 0; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
611 void* destBuffer = NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
612 PyObject* result = NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
613 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
614 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!:decompress_content_dict_chain", |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
615 kwlist, &PyList_Type, &chunks)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
616 return NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
617 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
618 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
619 chunksLen = PyList_Size(chunks); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
620 if (!chunksLen) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
621 PyErr_SetString(PyExc_ValueError, "empty input chain"); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
622 return NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
623 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
624 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
625 /* The first chunk should not be using a dictionary. We handle it specially. */ |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
626 chunk = PyList_GetItem(chunks, 0); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
627 if (!PyBytes_Check(chunk)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
628 PyErr_SetString(PyExc_ValueError, "chunk 0 must be bytes"); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
629 return NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
630 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
631 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
632 /* We require that all chunks be zstd frames and that they have content size set. */ |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
633 PyBytes_AsStringAndSize(chunk, &chunkData, &chunkSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
634 zresult = ZSTD_getFrameParams(&frameParams, (void*)chunkData, chunkSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
635 if (ZSTD_isError(zresult)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
636 PyErr_SetString(PyExc_ValueError, "chunk 0 is not a valid zstd frame"); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
637 return NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
638 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
639 else if (zresult) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
640 PyErr_SetString(PyExc_ValueError, "chunk 0 is too small to contain a zstd frame"); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
641 return NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
642 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
643 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
644 if (0 == frameParams.frameContentSize) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
645 PyErr_SetString(PyExc_ValueError, "chunk 0 missing content size in frame"); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
646 return NULL; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
647 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
648 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
649 dctx = ZSTD_createDCtx(); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
650 if (!dctx) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
651 PyErr_NoMemory(); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
652 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
653 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
654 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
655 buffer1Size = frameParams.frameContentSize; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
656 buffer1 = PyMem_Malloc(buffer1Size); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
657 if (!buffer1) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
658 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
659 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
660 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
661 Py_BEGIN_ALLOW_THREADS |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
662 zresult = ZSTD_decompressDCtx(dctx, buffer1, buffer1Size, chunkData, chunkSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
663 Py_END_ALLOW_THREADS |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
664 if (ZSTD_isError(zresult)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
665 PyErr_Format(ZstdError, "could not decompress chunk 0: %s", ZSTD_getErrorName(zresult)); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
666 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
667 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
668 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
669 buffer1ContentSize = zresult; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
670 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
671 /* Special case of a simple chain. */ |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
672 if (1 == chunksLen) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
673 result = PyBytes_FromStringAndSize(buffer1, buffer1Size); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
674 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
675 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
676 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
677 /* This should ideally look at next chunk. But this is slightly simpler. */ |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
678 buffer2Size = frameParams.frameContentSize; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
679 buffer2 = PyMem_Malloc(buffer2Size); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
680 if (!buffer2) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
681 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
682 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
683 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
684 /* For each subsequent chunk, use the previous fulltext as a content dictionary. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
685 Our strategy is to have 2 buffers. One holds the previous fulltext (to be |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
686 used as a content dictionary) and the other holds the new fulltext. The |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
687 buffers grow when needed but never decrease in size. This limits the |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
688 memory allocator overhead. |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
689 */ |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
690 for (chunkIndex = 1; chunkIndex < chunksLen; chunkIndex++) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
691 chunk = PyList_GetItem(chunks, chunkIndex); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
692 if (!PyBytes_Check(chunk)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
693 PyErr_Format(PyExc_ValueError, "chunk %zd must be bytes", chunkIndex); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
694 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
695 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
696 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
697 PyBytes_AsStringAndSize(chunk, &chunkData, &chunkSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
698 zresult = ZSTD_getFrameParams(&frameParams, (void*)chunkData, chunkSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
699 if (ZSTD_isError(zresult)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
700 PyErr_Format(PyExc_ValueError, "chunk %zd is not a valid zstd frame", chunkIndex); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
701 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
702 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
703 else if (zresult) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
704 PyErr_Format(PyExc_ValueError, "chunk %zd is too small to contain a zstd frame", chunkIndex); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
705 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
706 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
707 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
708 if (0 == frameParams.frameContentSize) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
709 PyErr_Format(PyExc_ValueError, "chunk %zd missing content size in frame", chunkIndex); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
710 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
711 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
712 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
713 parity = chunkIndex % 2; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
714 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
715 /* This could definitely be abstracted to reduce code duplication. */ |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
716 if (parity) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
717 /* Resize destination buffer to hold larger content. */ |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
718 if (buffer2Size < frameParams.frameContentSize) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
719 buffer2Size = frameParams.frameContentSize; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
720 destBuffer = PyMem_Realloc(buffer2, buffer2Size); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
721 if (!destBuffer) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
722 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
723 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
724 buffer2 = destBuffer; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
725 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
726 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
727 Py_BEGIN_ALLOW_THREADS |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
728 zresult = ZSTD_decompress_usingDict(dctx, buffer2, buffer2Size, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
729 chunkData, chunkSize, buffer1, buffer1ContentSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
730 Py_END_ALLOW_THREADS |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
731 if (ZSTD_isError(zresult)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
732 PyErr_Format(ZstdError, "could not decompress chunk %zd: %s", |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
733 chunkIndex, ZSTD_getErrorName(zresult)); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
734 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
735 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
736 buffer2ContentSize = zresult; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
737 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
738 else { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
739 if (buffer1Size < frameParams.frameContentSize) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
740 buffer1Size = frameParams.frameContentSize; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
741 destBuffer = PyMem_Realloc(buffer1, buffer1Size); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
742 if (!destBuffer) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
743 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
744 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
745 buffer1 = destBuffer; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
746 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
747 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
748 Py_BEGIN_ALLOW_THREADS |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
749 zresult = ZSTD_decompress_usingDict(dctx, buffer1, buffer1Size, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
750 chunkData, chunkSize, buffer2, buffer2ContentSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
751 Py_END_ALLOW_THREADS |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
752 if (ZSTD_isError(zresult)) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
753 PyErr_Format(ZstdError, "could not decompress chunk %zd: %s", |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
754 chunkIndex, ZSTD_getErrorName(zresult)); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
755 goto finally; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
756 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
757 buffer1ContentSize = zresult; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
758 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
759 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
760 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
761 result = PyBytes_FromStringAndSize(parity ? buffer2 : buffer1, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
762 parity ? buffer2ContentSize : buffer1ContentSize); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
763 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
764 finally: |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
765 if (buffer2) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
766 PyMem_Free(buffer2); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
767 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
768 if (buffer1) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
769 PyMem_Free(buffer1); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
770 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
771 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
772 if (dctx) { |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
773 ZSTD_freeDCtx(dctx); |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
774 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
775 |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
776 return result; |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
777 } |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
778 |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
779 static PyMethodDef Decompressor_methods[] = { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
780 { "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
|
781 Decompressor_copy_stream__doc__ }, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
782 { "decompress", (PyCFunction)Decompressor_decompress, METH_VARARGS | METH_KEYWORDS, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
783 Decompressor_decompress__doc__ }, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
784 { "decompressobj", (PyCFunction)Decompressor_decompressobj, METH_NOARGS, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
785 Decompressor_decompressobj__doc__ }, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
786 { "read_from", (PyCFunction)Decompressor_read_from, METH_VARARGS | METH_KEYWORDS, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
787 Decompressor_read_from__doc__ }, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
788 { "write_to", (PyCFunction)Decompressor_write_to, METH_VARARGS | METH_KEYWORDS, |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
789 Decompressor_write_to__doc__ }, |
30895
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
790 { "decompress_content_dict_chain", (PyCFunction)Decompressor_decompress_content_dict_chain, |
c32454d69b85
zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30830
diff
changeset
|
791 METH_VARARGS | METH_KEYWORDS, Decompressor_decompress_content_dict_chain__doc__ }, |
30435
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
792 { NULL, NULL } |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
793 }; |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
794 |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
795 PyTypeObject ZstdDecompressorType = { |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
796 PyVarObject_HEAD_INIT(NULL, 0) |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
797 "zstd.ZstdDecompressor", /* tp_name */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
798 sizeof(ZstdDecompressor), /* tp_basicsize */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
799 0, /* tp_itemsize */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
800 (destructor)Decompressor_dealloc, /* tp_dealloc */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
801 0, /* tp_print */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
802 0, /* tp_getattr */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
803 0, /* tp_setattr */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
804 0, /* tp_compare */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
805 0, /* tp_repr */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
806 0, /* tp_as_number */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
807 0, /* tp_as_sequence */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
808 0, /* tp_as_mapping */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
809 0, /* tp_hash */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
810 0, /* tp_call */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
811 0, /* tp_str */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
812 0, /* tp_getattro */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
813 0, /* tp_setattro */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
814 0, /* tp_as_buffer */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
815 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
816 Decompressor__doc__, /* tp_doc */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
817 0, /* tp_traverse */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
818 0, /* tp_clear */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
819 0, /* tp_richcompare */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
820 0, /* tp_weaklistoffset */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
821 0, /* tp_iter */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
822 0, /* tp_iternext */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
823 Decompressor_methods, /* tp_methods */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
824 0, /* tp_members */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
825 0, /* tp_getset */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
826 0, /* tp_base */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
827 0, /* tp_dict */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
828 0, /* tp_descr_get */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
829 0, /* tp_descr_set */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
830 0, /* tp_dictoffset */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
831 (initproc)Decompressor_init, /* tp_init */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
832 0, /* tp_alloc */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
833 PyType_GenericNew, /* tp_new */ |
b86a448a2965
zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
834 }; |
b86a448a2965
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835 |
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836 void decompressor_module_init(PyObject* mod) { |
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837 Py_TYPE(&ZstdDecompressorType) = &PyType_Type; |
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838 if (PyType_Ready(&ZstdDecompressorType) < 0) { |
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839 return; |
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840 } |
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841 |
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842 Py_INCREF((PyObject*)&ZstdDecompressorType); |
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Gregory Szorc <gregory.szorc@gmail.com>
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843 PyModule_AddObject(mod, "ZstdDecompressor", |
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844 (PyObject*)&ZstdDecompressorType); |
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845 } |