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annotate contrib/python-zstandard/c-ext/constants.c @ 30822:b54a2984cdd4

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zstd: vendor python-zstandard 0.6.0 Commit 63c68d6f5fc8de4afd9bde81b13b537beb4e47e8 from https://github.com/indygreg/python-zstandard is imported without modifications (other than removing unwanted files). This includes minor performance and feature improvements. It also changes the vendored zstd library from 1.1.1 to 1.1.2. # no-check-commit
author Gregory Szorc <gregory.szorc@gmail.com>
date Sat, 14 Jan 2017 19:41:43 -0800
parents b86a448a2965
children e0dc40530c5a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 static char frame_header[] = {
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14 '\x28',
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15 '\xb5',
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16 '\x2f',
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17 '\xfd',
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18 };
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19
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20 void constants_module_init(PyObject* mod) {
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21 PyObject* version;
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22 PyObject* zstdVersion;
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23 PyObject* frameHeader;
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24
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25 #if PY_MAJOR_VERSION >= 3
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26 version = PyUnicode_FromString(PYTHON_ZSTANDARD_VERSION);
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27 #else
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28 version = PyString_FromString(PYTHON_ZSTANDARD_VERSION);
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29 #endif
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30 Py_INCREF(version);
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31 PyModule_AddObject(mod, "__version__", version);
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32
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33 ZstdError = PyErr_NewException("zstd.ZstdError", NULL, NULL);
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34 PyModule_AddObject(mod, "ZstdError", ZstdError);
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35
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36 PyModule_AddIntConstant(mod, "COMPRESSOBJ_FLUSH_FINISH", compressorobj_flush_finish);
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37 PyModule_AddIntConstant(mod, "COMPRESSOBJ_FLUSH_BLOCK", compressorobj_flush_block);
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38
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39 /* For now, the version is a simple tuple instead of a dedicated type. */
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40 zstdVersion = PyTuple_New(3);
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41 PyTuple_SetItem(zstdVersion, 0, PyLong_FromLong(ZSTD_VERSION_MAJOR));
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42 PyTuple_SetItem(zstdVersion, 1, PyLong_FromLong(ZSTD_VERSION_MINOR));
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43 PyTuple_SetItem(zstdVersion, 2, PyLong_FromLong(ZSTD_VERSION_RELEASE));
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44 Py_IncRef(zstdVersion);
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45 PyModule_AddObject(mod, "ZSTD_VERSION", zstdVersion);
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46
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47 frameHeader = PyBytes_FromStringAndSize(frame_header, sizeof(frame_header));
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48 if (frameHeader) {
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49 PyModule_AddObject(mod, "FRAME_HEADER", frameHeader);
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50 }
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51 else {
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52 PyErr_Format(PyExc_ValueError, "could not create frame header object");
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53 }
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54
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55 PyModule_AddIntConstant(mod, "MAX_COMPRESSION_LEVEL", ZSTD_maxCLevel());
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56 PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_INPUT_SIZE",
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57 (long)ZSTD_CStreamInSize());
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58 PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_OUTPUT_SIZE",
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59 (long)ZSTD_CStreamOutSize());
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60 PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_INPUT_SIZE",
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61 (long)ZSTD_DStreamInSize());
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62 PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE",
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63 (long)ZSTD_DStreamOutSize());
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64
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65 PyModule_AddIntConstant(mod, "MAGIC_NUMBER", ZSTD_MAGICNUMBER);
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66 PyModule_AddIntConstant(mod, "WINDOWLOG_MIN", ZSTD_WINDOWLOG_MIN);
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67 PyModule_AddIntConstant(mod, "WINDOWLOG_MAX", ZSTD_WINDOWLOG_MAX);
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68 PyModule_AddIntConstant(mod, "CHAINLOG_MIN", ZSTD_CHAINLOG_MIN);
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69 PyModule_AddIntConstant(mod, "CHAINLOG_MAX", ZSTD_CHAINLOG_MAX);
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70 PyModule_AddIntConstant(mod, "HASHLOG_MIN", ZSTD_HASHLOG_MIN);
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71 PyModule_AddIntConstant(mod, "HASHLOG_MAX", ZSTD_HASHLOG_MAX);
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72 PyModule_AddIntConstant(mod, "HASHLOG3_MAX", ZSTD_HASHLOG3_MAX);
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73 PyModule_AddIntConstant(mod, "SEARCHLOG_MIN", ZSTD_SEARCHLOG_MIN);
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74 PyModule_AddIntConstant(mod, "SEARCHLOG_MAX", ZSTD_SEARCHLOG_MAX);
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75 PyModule_AddIntConstant(mod, "SEARCHLENGTH_MIN", ZSTD_SEARCHLENGTH_MIN);
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76 PyModule_AddIntConstant(mod, "SEARCHLENGTH_MAX", ZSTD_SEARCHLENGTH_MAX);
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77 PyModule_AddIntConstant(mod, "TARGETLENGTH_MIN", ZSTD_TARGETLENGTH_MIN);
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78 PyModule_AddIntConstant(mod, "TARGETLENGTH_MAX", ZSTD_TARGETLENGTH_MAX);
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79
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80 PyModule_AddIntConstant(mod, "STRATEGY_FAST", ZSTD_fast);
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81 PyModule_AddIntConstant(mod, "STRATEGY_DFAST", ZSTD_dfast);
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82 PyModule_AddIntConstant(mod, "STRATEGY_GREEDY", ZSTD_greedy);
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83 PyModule_AddIntConstant(mod, "STRATEGY_LAZY", ZSTD_lazy);
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84 PyModule_AddIntConstant(mod, "STRATEGY_LAZY2", ZSTD_lazy2);
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85 PyModule_AddIntConstant(mod, "STRATEGY_BTLAZY2", ZSTD_btlazy2);
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86 PyModule_AddIntConstant(mod, "STRATEGY_BTOPT", ZSTD_btopt);
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87 }