##// END OF EJS Templates
revlog: introduce a `display_id` property...
revlog: introduce a `display_id` property We currently using the "index file" to identify a revlog in error output. Since we are about to make the "index file" location more volatile, we need something better. We move to use the "radix", as it is close to what we currently use. We could probably do better, as pointed out in the comment, however that would be a quite detour from my current goal. Differential Revision: https://phab.mercurial-scm.org/D10579

File last commit:

r47090:e92ca942 default
r47924:fbf38517 default
Show More
frameparams.c
138 lines | 4.2 KiB | text/x-c | CLexer
/**
* 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_SET_TYPE(&FrameParametersType, &PyType_Type);
if (PyType_Ready(&FrameParametersType) < 0) {
return;
}
Py_INCREF(&FrameParametersType);
PyModule_AddObject(mod, "FrameParameters", (PyObject*)&FrameParametersType);
}