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annotate contrib/python-zstandard/c-ext/compressionwriter.c @ 40121:73fef626dae3

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zstandard: vendor python-zstandard 0.10.1 This was just released. The upstream source distribution from PyPI was extracted. Unwanted files were removed. The clang-format ignore list was updated to reflect the new source of files. setup.py was updated to pass a new argument to python-zstandard's function for returning an Extension instance. Upstream had to change to use relative paths because Python 3.7's packaging doesn't seem to like absolute paths when defining sources, includes, etc. The default relative path calculation is relative to setup_zstd.py which is different from the directory of Mercurial's setup.py. The project contains a vendored copy of zstandard 1.3.6. The old version was 1.3.4. The API should be backwards compatible and nothing in core should need adjusted. However, there is a new "chunker" API that we may find useful in places where we want to emit compressed chunks of a fixed size. There are a pair of bug fixes in 0.10.0 with regards to compressobj() and decompressobj() when block flushing is used. I actually found these bugs when introducing these APIs in Mercurial! But existing Mercurial code is not affected because we don't perform block flushing. # no-check-commit because 3rd party code has different style guidelines Differential Revision: https://phab.mercurial-scm.org/D4911
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 08 Oct 2018 16:27:40 -0700
parents b1fb341d8a61
children 675775c33ab6
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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 PyDoc_STRVAR(ZstdCompresssionWriter__doc__,
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14 """A context manager used for writing compressed output to a writer.\n"
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15 );
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16
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17 static void ZstdCompressionWriter_dealloc(ZstdCompressionWriter* self) {
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18 Py_XDECREF(self->compressor);
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19 Py_XDECREF(self->writer);
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20
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21 PyObject_Del(self);
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22 }
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23
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24 static PyObject* ZstdCompressionWriter_enter(ZstdCompressionWriter* self) {
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25 size_t zresult;
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26
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27 if (self->entered) {
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28 PyErr_SetString(ZstdError, "cannot __enter__ multiple times");
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29 return NULL;
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30 }
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31
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32 zresult = ZSTD_CCtx_setPledgedSrcSize(self->compressor->cctx, self->sourceSize);
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33 if (ZSTD_isError(zresult)) {
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34 PyErr_Format(ZstdError, "error setting source size: %s",
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35 ZSTD_getErrorName(zresult));
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36 return NULL;
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37 }
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38
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39 self->entered = 1;
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40
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41 Py_INCREF(self);
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42 return (PyObject*)self;
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43 }
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44
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45 static PyObject* ZstdCompressionWriter_exit(ZstdCompressionWriter* self, PyObject* args) {
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46 PyObject* exc_type;
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47 PyObject* exc_value;
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48 PyObject* exc_tb;
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49 size_t zresult;
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50
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51 ZSTD_outBuffer output;
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52 PyObject* res;
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53
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54 if (!PyArg_ParseTuple(args, "OOO:__exit__", &exc_type, &exc_value, &exc_tb)) {
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55 return NULL;
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56 }
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57
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58 self->entered = 0;
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59
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60 if (exc_type == Py_None && exc_value == Py_None && exc_tb == Py_None) {
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61 ZSTD_inBuffer inBuffer;
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62
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63 inBuffer.src = NULL;
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64 inBuffer.size = 0;
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65 inBuffer.pos = 0;
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66
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67 output.dst = PyMem_Malloc(self->outSize);
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68 if (!output.dst) {
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69 return PyErr_NoMemory();
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70 }
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71 output.size = self->outSize;
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72 output.pos = 0;
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73
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74 while (1) {
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75 zresult = ZSTD_compress_generic(self->compressor->cctx, &output, &inBuffer, ZSTD_e_end);
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76 if (ZSTD_isError(zresult)) {
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77 PyErr_Format(ZstdError, "error ending compression stream: %s",
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78 ZSTD_getErrorName(zresult));
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79 PyMem_Free(output.dst);
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80 return NULL;
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81 }
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82
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83 if (output.pos) {
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84 #if PY_MAJOR_VERSION >= 3
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85 res = PyObject_CallMethod(self->writer, "write", "y#",
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86 #else
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87 res = PyObject_CallMethod(self->writer, "write", "s#",
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88 #endif
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89 output.dst, output.pos);
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90 Py_XDECREF(res);
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91 }
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92
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93 if (!zresult) {
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94 break;
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95 }
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96
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97 output.pos = 0;
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98 }
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99
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100 PyMem_Free(output.dst);
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101 }
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102
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103 Py_RETURN_FALSE;
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104 }
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105
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106 static PyObject* ZstdCompressionWriter_memory_size(ZstdCompressionWriter* self) {
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107 return PyLong_FromSize_t(ZSTD_sizeof_CCtx(self->compressor->cctx));
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108 }
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109
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110 static PyObject* ZstdCompressionWriter_write(ZstdCompressionWriter* self, PyObject* args, PyObject* kwargs) {
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111 static char* kwlist[] = {
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112 "data",
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113 NULL
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114 };
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115
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116 PyObject* result = NULL;
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117 Py_buffer source;
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118 size_t zresult;
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119 ZSTD_inBuffer input;
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120 ZSTD_outBuffer output;
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121 PyObject* res;
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122 Py_ssize_t totalWrite = 0;
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123
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124 #if PY_MAJOR_VERSION >= 3
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125 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y*:write",
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126 #else
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127 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s*:write",
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128 #endif
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129 kwlist, &source)) {
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
130 return NULL;
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
131 }
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
132
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
133 if (!self->entered) {
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
134 PyErr_SetString(ZstdError, "compress must be called from an active context manager");
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
135 goto finally;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
136 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
137
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
138 if (!PyBuffer_IsContiguous(&source, 'C') || source.ndim > 1) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
139 PyErr_SetString(PyExc_ValueError,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
140 "data buffer should be contiguous and have at most one dimension");
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
141 goto finally;
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
142 }
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
143
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
144 output.dst = PyMem_Malloc(self->outSize);
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
145 if (!output.dst) {
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
146 PyErr_NoMemory();
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
147 goto finally;
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
148 }
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
149 output.size = self->outSize;
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
150 output.pos = 0;
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
151
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
152 input.src = source.buf;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
153 input.size = source.len;
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
154 input.pos = 0;
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
155
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
156 while ((ssize_t)input.pos < source.len) {
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
157 Py_BEGIN_ALLOW_THREADS
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
158 zresult = ZSTD_compress_generic(self->compressor->cctx, &output, &input, ZSTD_e_continue);
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
159 Py_END_ALLOW_THREADS
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
160
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
161 if (ZSTD_isError(zresult)) {
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
162 PyMem_Free(output.dst);
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
163 PyErr_Format(ZstdError, "zstd compress error: %s", ZSTD_getErrorName(zresult));
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
164 goto finally;
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
165 }
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
166
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
167 /* Copy data from output buffer to writer. */
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
168 if (output.pos) {
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
169 #if PY_MAJOR_VERSION >= 3
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
170 res = PyObject_CallMethod(self->writer, "write", "y#",
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
171 #else
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
172 res = PyObject_CallMethod(self->writer, "write", "s#",
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
173 #endif
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
174 output.dst, output.pos);
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
175 Py_XDECREF(res);
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30822
diff changeset
176 totalWrite += output.pos;
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
177 self->bytesCompressed += output.pos;
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
178 }
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
179 output.pos = 0;
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
180 }
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
181
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
182 PyMem_Free(output.dst);
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
183
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
184 result = PyLong_FromSsize_t(totalWrite);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
185
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
186 finally:
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
187 PyBuffer_Release(&source);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
188 return result;
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
189 }
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
190
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
191 static PyObject* ZstdCompressionWriter_flush(ZstdCompressionWriter* self, PyObject* args) {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
192 size_t zresult;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
193 ZSTD_outBuffer output;
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
194 ZSTD_inBuffer input;
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
195 PyObject* res;
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30822
diff changeset
196 Py_ssize_t totalWrite = 0;
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
197
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
198 if (!self->entered) {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
199 PyErr_SetString(ZstdError, "flush must be called from an active context manager");
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
200 return NULL;
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
201 }
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
202
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
203 input.src = NULL;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
204 input.size = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
205 input.pos = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
206
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
207 output.dst = PyMem_Malloc(self->outSize);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
208 if (!output.dst) {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
209 return PyErr_NoMemory();
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
210 }
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
211 output.size = self->outSize;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
212 output.pos = 0;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
213
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
214 while (1) {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
215 Py_BEGIN_ALLOW_THREADS
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
216 zresult = ZSTD_compress_generic(self->compressor->cctx, &output, &input, ZSTD_e_flush);
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
217 Py_END_ALLOW_THREADS
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
218
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
219 if (ZSTD_isError(zresult)) {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
220 PyMem_Free(output.dst);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
221 PyErr_Format(ZstdError, "zstd compress error: %s", ZSTD_getErrorName(zresult));
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
222 return NULL;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
223 }
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
224
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
225 /* Copy data from output buffer to writer. */
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
226 if (output.pos) {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
227 #if PY_MAJOR_VERSION >= 3
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
228 res = PyObject_CallMethod(self->writer, "write", "y#",
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
229 #else
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
230 res = PyObject_CallMethod(self->writer, "write", "s#",
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
231 #endif
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
232 output.dst, output.pos);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
233 Py_XDECREF(res);
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30822
diff changeset
234 totalWrite += output.pos;
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
235 self->bytesCompressed += output.pos;
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
236 }
40121
73fef626dae3 zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37495
diff changeset
237
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
238 output.pos = 0;
40121
73fef626dae3 zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37495
diff changeset
239
73fef626dae3 zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37495
diff changeset
240 if (!zresult) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37495
diff changeset
241 break;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37495
diff changeset
242 }
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
243 }
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
244
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
245 PyMem_Free(output.dst);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
246
30895
c32454d69b85 zstd: vendor python-zstandard 0.7.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30822
diff changeset
247 return PyLong_FromSsize_t(totalWrite);
30822
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
248 }
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 30435
diff changeset
249
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
250 static PyObject* ZstdCompressionWriter_tell(ZstdCompressionWriter* self) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
251 return PyLong_FromUnsignedLongLong(self->bytesCompressed);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
252 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
253
30435
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
254 static PyMethodDef ZstdCompressionWriter_methods[] = {
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
255 { "__enter__", (PyCFunction)ZstdCompressionWriter_enter, METH_NOARGS,
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
256 PyDoc_STR("Enter a compression context.") },
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
257 { "__exit__", (PyCFunction)ZstdCompressionWriter_exit, METH_VARARGS,
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
258 PyDoc_STR("Exit a compression context.") },
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
259 { "memory_size", (PyCFunction)ZstdCompressionWriter_memory_size, METH_NOARGS,
b86a448a2965 zstd: vendor python-zstandard 0.5.0
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff changeset
260 PyDoc_STR("Obtain the memory size of the underlying compressor") },
37495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0
Gregory Szorc <gregory.szorc@gmail.com>
parents: 31796
diff changeset
261 { "write", (PyCFunction)ZstdCompressionWriter_write, METH_VARARGS | METH_KEYWORDS,
30435
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262 PyDoc_STR("Compress data") },
30822
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263 { "flush", (PyCFunction)ZstdCompressionWriter_flush, METH_NOARGS,
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264 PyDoc_STR("Flush data and finish a zstd frame") },
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265 { "tell", (PyCFunction)ZstdCompressionWriter_tell, METH_NOARGS,
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266 PyDoc_STR("Returns current number of bytes compressed") },
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267 { NULL, NULL }
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268 };
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269
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270 PyTypeObject ZstdCompressionWriterType = {
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271 PyVarObject_HEAD_INIT(NULL, 0)
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272 "zstd.ZstdCompressionWriter", /* tp_name */
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273 sizeof(ZstdCompressionWriter), /* tp_basicsize */
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274 0, /* tp_itemsize */
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275 (destructor)ZstdCompressionWriter_dealloc, /* tp_dealloc */
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276 0, /* tp_print */
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277 0, /* tp_getattr */
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278 0, /* tp_setattr */
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279 0, /* tp_compare */
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280 0, /* tp_repr */
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281 0, /* tp_as_number */
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282 0, /* tp_as_sequence */
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283 0, /* tp_as_mapping */
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284 0, /* tp_hash */
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285 0, /* tp_call */
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286 0, /* tp_str */
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287 0, /* tp_getattro */
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288 0, /* tp_setattro */
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289 0, /* tp_as_buffer */
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290 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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291 ZstdCompresssionWriter__doc__, /* tp_doc */
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292 0, /* tp_traverse */
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293 0, /* tp_clear */
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294 0, /* tp_richcompare */
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295 0, /* tp_weaklistoffset */
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296 0, /* tp_iter */
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297 0, /* tp_iternext */
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298 ZstdCompressionWriter_methods, /* tp_methods */
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299 0, /* tp_members */
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300 0, /* tp_getset */
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301 0, /* tp_base */
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302 0, /* tp_dict */
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303 0, /* tp_descr_get */
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parents:
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304 0, /* tp_descr_set */
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parents:
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305 0, /* tp_dictoffset */
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parents:
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306 0, /* tp_init */
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307 0, /* tp_alloc */
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308 PyType_GenericNew, /* tp_new */
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309 };
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310
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311 void compressionwriter_module_init(PyObject* mod) {
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312 Py_TYPE(&ZstdCompressionWriterType) = &PyType_Type;
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313 if (PyType_Ready(&ZstdCompressionWriterType) < 0) {
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314 return;
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315 }
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316 }