Mercurial > hg
view contrib/python-zstandard/c-ext/frameparams.c @ 37495:b1fb341d8a61
zstandard: vendor python-zstandard 0.9.0
This was just released. It features a number of goodies. More info at
https://gregoryszorc.com/blog/2018/04/09/release-of-python-zstandard-0.9/.
The clang-format ignore list was updated to reflect the new source
of files.
The project contains a vendored copy of zstandard 1.3.4. The old
version was 1.1.3. One of the changes between those versions is that
zstandard is now dual licensed BSD + GPLv2 and the patent rights grant
has been removed. Good riddance.
The API should be backwards compatible. So no changes in core
should be needed. However, there were a number of changes in the
library that we'll want to adapt to. Those will be addressed in
subsequent commits.
Differential Revision: https://phab.mercurial-scm.org/D3198
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 09 Apr 2018 10:13:29 -0700 |
parents | e0dc40530c5a |
children | e92ca942ddca |
line wrap: on
line source
/** * Copyright (c) 2017-present, Gregory Szorc * All rights reserved. * * This software may be modified and distributed under the terms * of the BSD license. See the LICENSE file for details. */ #include "python-zstandard.h" extern PyObject* ZstdError; PyDoc_STRVAR(FrameParameters__doc__, "FrameParameters: information about a zstd frame"); FrameParametersObject* get_frame_parameters(PyObject* self, PyObject* args, PyObject* kwargs) { static char* kwlist[] = { "data", NULL }; Py_buffer source; ZSTD_frameHeader header; FrameParametersObject* result = NULL; size_t zresult; #if PY_MAJOR_VERSION >= 3 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y*:get_frame_parameters", #else if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s*:get_frame_parameters", #endif kwlist, &source)) { return NULL; } if (!PyBuffer_IsContiguous(&source, 'C') || source.ndim > 1) { PyErr_SetString(PyExc_ValueError, "data buffer should be contiguous and have at most one dimension"); goto finally; } zresult = ZSTD_getFrameHeader(&header, source.buf, source.len); if (ZSTD_isError(zresult)) { PyErr_Format(ZstdError, "cannot get frame parameters: %s", ZSTD_getErrorName(zresult)); goto finally; } if (zresult) { PyErr_Format(ZstdError, "not enough data for frame parameters; need %zu bytes", zresult); goto finally; } result = PyObject_New(FrameParametersObject, &FrameParametersType); if (!result) { goto finally; } result->frameContentSize = header.frameContentSize; result->windowSize = header.windowSize; result->dictID = header.dictID; result->checksumFlag = header.checksumFlag ? 1 : 0; finally: PyBuffer_Release(&source); return result; } static void FrameParameters_dealloc(PyObject* self) { PyObject_Del(self); } static PyMemberDef FrameParameters_members[] = { { "content_size", T_ULONGLONG, offsetof(FrameParametersObject, frameContentSize), READONLY, "frame content size" }, { "window_size", T_ULONGLONG, offsetof(FrameParametersObject, windowSize), READONLY, "window size" }, { "dict_id", T_UINT, offsetof(FrameParametersObject, dictID), READONLY, "dictionary ID" }, { "has_checksum", T_BOOL, offsetof(FrameParametersObject, checksumFlag), READONLY, "checksum flag" }, { NULL } }; PyTypeObject FrameParametersType = { PyVarObject_HEAD_INIT(NULL, 0) "FrameParameters", /* tp_name */ sizeof(FrameParametersObject), /* tp_basicsize */ 0, /* tp_itemsize */ (destructor)FrameParameters_dealloc, /* tp_dealloc */ 0, /* tp_print */ 0, /* tp_getattr */ 0, /* tp_setattr */ 0, /* tp_compare */ 0, /* tp_repr */ 0, /* tp_as_number */ 0, /* tp_as_sequence */ 0, /* tp_as_mapping */ 0, /* tp_hash */ 0, /* tp_call */ 0, /* tp_str */ 0, /* tp_getattro */ 0, /* tp_setattro */ 0, /* tp_as_buffer */ Py_TPFLAGS_DEFAULT, /* tp_flags */ FrameParameters__doc__, /* tp_doc */ 0, /* tp_traverse */ 0, /* tp_clear */ 0, /* tp_richcompare */ 0, /* tp_weaklistoffset */ 0, /* tp_iter */ 0, /* tp_iternext */ 0, /* tp_methods */ FrameParameters_members, /* tp_members */ 0, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ 0, /* tp_descr_get */ 0, /* tp_descr_set */ 0, /* tp_dictoffset */ 0, /* tp_init */ 0, /* tp_alloc */ 0, /* tp_new */ }; void frameparams_module_init(PyObject* mod) { Py_TYPE(&FrameParametersType) = &PyType_Type; if (PyType_Ready(&FrameParametersType) < 0) { return; } Py_INCREF(&FrameParametersType); PyModule_AddObject(mod, "FrameParameters", (PyObject*)&FrameParametersType); }