upstream/mercurial-mirror Files · contrib/python-zstandard/c-ext/constants.c

revset: lookup descendents for negative arguments to ancestor operator...

revset: lookup descendents for negative arguments to ancestor operator Negative offsets to the `~` operator now search for descendents. The search is aborted when a node has more than one child as we do not have a definition for 'nth child'. Optionally we can introduce such a notion and take the nth child ordered by rev number. The current revset language does provides a short operator for ancestor lookup but not for descendents. This gives user a simple revset to move to the previous changeset, e.g. `hg up '.~1'` but not to the 'next' changeset. With this change userse can now use `.~-1` as a shortcut to move to the next changeset. This fits better into allowing users to specify revisions via revsets and avoiding the need for special `hg next` and `hg prev` operations. The alternative to negative offsets is adding a new operator. We do not have many operators in ascii left that do not require bash escaping (',', '_', and '/' come to mind). If we decide that we should add a more convenient short operator such as ('/', e.g. './1') we can later add it and allow ascendents lookup via negative numbers.

Gregory Szorc - - Load All Authors

File last commit:

r31796:e0dc4053 default


                r32699:f75d0aa5

default

Download file

             constants.c
        
                    87 lines
            
             | 3.4 KiB
            
                | text/x-c
            
             |
                CLexer
            
             / contrib / python-zstandard / c-ext / constants.c
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      /**

      * Copyright (c) 2016-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;

      static char frame_header[] = {

      	'\x28',

      	'\xb5',

      	'\x2f',

      	'\xfd',

      };

      void constants_module_init(PyObject* mod) {

      	PyObject* version;

      	PyObject* zstdVersion;

      	PyObject* frameHeader;

      #if PY_MAJOR_VERSION >= 3

      	version = PyUnicode_FromString(PYTHON_ZSTANDARD_VERSION);

      #else

      	version = PyString_FromString(PYTHON_ZSTANDARD_VERSION);

      #endif

      	Py_INCREF(version);

      	PyModule_AddObject(mod, "__version__", version);

      	ZstdError = PyErr_NewException("zstd.ZstdError", NULL, NULL);

      	PyModule_AddObject(mod, "ZstdError", ZstdError);

      	PyModule_AddIntConstant(mod, "COMPRESSOBJ_FLUSH_FINISH", compressorobj_flush_finish);

      	PyModule_AddIntConstant(mod, "COMPRESSOBJ_FLUSH_BLOCK", compressorobj_flush_block);

      	/* For now, the version is a simple tuple instead of a dedicated type. */

      	zstdVersion = PyTuple_New(3);

      	PyTuple_SetItem(zstdVersion, 0, PyLong_FromLong(ZSTD_VERSION_MAJOR));

      	PyTuple_SetItem(zstdVersion, 1, PyLong_FromLong(ZSTD_VERSION_MINOR));

      	PyTuple_SetItem(zstdVersion, 2, PyLong_FromLong(ZSTD_VERSION_RELEASE));

      	Py_INCREF(zstdVersion);

      	PyModule_AddObject(mod, "ZSTD_VERSION", zstdVersion);

      	frameHeader = PyBytes_FromStringAndSize(frame_header, sizeof(frame_header));

      	if (frameHeader) {

      		PyModule_AddObject(mod, "FRAME_HEADER", frameHeader);

      	}

      	else {

      		PyErr_Format(PyExc_ValueError, "could not create frame header object");

      	}

      	PyModule_AddIntConstant(mod, "MAX_COMPRESSION_LEVEL", ZSTD_maxCLevel());

      	PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_INPUT_SIZE",

      		(long)ZSTD_CStreamInSize());

      	PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_OUTPUT_SIZE",

      		(long)ZSTD_CStreamOutSize());

      	PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_INPUT_SIZE",

      		(long)ZSTD_DStreamInSize());

      	PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE",

      		(long)ZSTD_DStreamOutSize());

      	PyModule_AddIntConstant(mod, "MAGIC_NUMBER", ZSTD_MAGICNUMBER);

      	PyModule_AddIntConstant(mod, "WINDOWLOG_MIN", ZSTD_WINDOWLOG_MIN);

      	PyModule_AddIntConstant(mod, "WINDOWLOG_MAX", ZSTD_WINDOWLOG_MAX);

      	PyModule_AddIntConstant(mod, "CHAINLOG_MIN", ZSTD_CHAINLOG_MIN);

      	PyModule_AddIntConstant(mod, "CHAINLOG_MAX", ZSTD_CHAINLOG_MAX);

      	PyModule_AddIntConstant(mod, "HASHLOG_MIN", ZSTD_HASHLOG_MIN);

      	PyModule_AddIntConstant(mod, "HASHLOG_MAX", ZSTD_HASHLOG_MAX);

      	PyModule_AddIntConstant(mod, "HASHLOG3_MAX", ZSTD_HASHLOG3_MAX);

      	PyModule_AddIntConstant(mod, "SEARCHLOG_MIN", ZSTD_SEARCHLOG_MIN);

      	PyModule_AddIntConstant(mod, "SEARCHLOG_MAX", ZSTD_SEARCHLOG_MAX);

      	PyModule_AddIntConstant(mod, "SEARCHLENGTH_MIN", ZSTD_SEARCHLENGTH_MIN);

      	PyModule_AddIntConstant(mod, "SEARCHLENGTH_MAX", ZSTD_SEARCHLENGTH_MAX);

      	PyModule_AddIntConstant(mod, "TARGETLENGTH_MIN", ZSTD_TARGETLENGTH_MIN);

      	PyModule_AddIntConstant(mod, "TARGETLENGTH_MAX", ZSTD_TARGETLENGTH_MAX);

      	PyModule_AddIntConstant(mod, "STRATEGY_FAST", ZSTD_fast);

      	PyModule_AddIntConstant(mod, "STRATEGY_DFAST", ZSTD_dfast);

      	PyModule_AddIntConstant(mod, "STRATEGY_GREEDY", ZSTD_greedy);

      	PyModule_AddIntConstant(mod, "STRATEGY_LAZY", ZSTD_lazy);

      	PyModule_AddIntConstant(mod, "STRATEGY_LAZY2", ZSTD_lazy2);

      	PyModule_AddIntConstant(mod, "STRATEGY_BTLAZY2", ZSTD_btlazy2);

      	PyModule_AddIntConstant(mod, "STRATEGY_BTOPT", ZSTD_btopt);

      }

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				/**
				* Copyright (c) 2016-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;

				static char frame_header[] = {
				'\x28',
				'\xb5',
				'\x2f',
				'\xfd',
				};

				void constants_module_init(PyObject* mod) {
				PyObject* version;
				PyObject* zstdVersion;
				PyObject* frameHeader;

				#if PY_MAJOR_VERSION >= 3
				version = PyUnicode_FromString(PYTHON_ZSTANDARD_VERSION);
				#else
				version = PyString_FromString(PYTHON_ZSTANDARD_VERSION);
				#endif
				Py_INCREF(version);
				PyModule_AddObject(mod, "__version__", version);

				ZstdError = PyErr_NewException("zstd.ZstdError", NULL, NULL);
				PyModule_AddObject(mod, "ZstdError", ZstdError);

				PyModule_AddIntConstant(mod, "COMPRESSOBJ_FLUSH_FINISH", compressorobj_flush_finish);
				PyModule_AddIntConstant(mod, "COMPRESSOBJ_FLUSH_BLOCK", compressorobj_flush_block);

				/* For now, the version is a simple tuple instead of a dedicated type. */
				zstdVersion = PyTuple_New(3);
				PyTuple_SetItem(zstdVersion, 0, PyLong_FromLong(ZSTD_VERSION_MAJOR));
				PyTuple_SetItem(zstdVersion, 1, PyLong_FromLong(ZSTD_VERSION_MINOR));
				PyTuple_SetItem(zstdVersion, 2, PyLong_FromLong(ZSTD_VERSION_RELEASE));
				Py_INCREF(zstdVersion);
				PyModule_AddObject(mod, "ZSTD_VERSION", zstdVersion);

				frameHeader = PyBytes_FromStringAndSize(frame_header, sizeof(frame_header));
				if (frameHeader) {
				PyModule_AddObject(mod, "FRAME_HEADER", frameHeader);
				}
				else {
				PyErr_Format(PyExc_ValueError, "could not create frame header object");
				}

				PyModule_AddIntConstant(mod, "MAX_COMPRESSION_LEVEL", ZSTD_maxCLevel());
				PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_INPUT_SIZE",
				(long)ZSTD_CStreamInSize());
				PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_OUTPUT_SIZE",
				(long)ZSTD_CStreamOutSize());
				PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_INPUT_SIZE",
				(long)ZSTD_DStreamInSize());
				PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE",
				(long)ZSTD_DStreamOutSize());

				PyModule_AddIntConstant(mod, "MAGIC_NUMBER", ZSTD_MAGICNUMBER);
				PyModule_AddIntConstant(mod, "WINDOWLOG_MIN", ZSTD_WINDOWLOG_MIN);
				PyModule_AddIntConstant(mod, "WINDOWLOG_MAX", ZSTD_WINDOWLOG_MAX);
				PyModule_AddIntConstant(mod, "CHAINLOG_MIN", ZSTD_CHAINLOG_MIN);
				PyModule_AddIntConstant(mod, "CHAINLOG_MAX", ZSTD_CHAINLOG_MAX);
				PyModule_AddIntConstant(mod, "HASHLOG_MIN", ZSTD_HASHLOG_MIN);
				PyModule_AddIntConstant(mod, "HASHLOG_MAX", ZSTD_HASHLOG_MAX);
				PyModule_AddIntConstant(mod, "HASHLOG3_MAX", ZSTD_HASHLOG3_MAX);
				PyModule_AddIntConstant(mod, "SEARCHLOG_MIN", ZSTD_SEARCHLOG_MIN);
				PyModule_AddIntConstant(mod, "SEARCHLOG_MAX", ZSTD_SEARCHLOG_MAX);
				PyModule_AddIntConstant(mod, "SEARCHLENGTH_MIN", ZSTD_SEARCHLENGTH_MIN);
				PyModule_AddIntConstant(mod, "SEARCHLENGTH_MAX", ZSTD_SEARCHLENGTH_MAX);
				PyModule_AddIntConstant(mod, "TARGETLENGTH_MIN", ZSTD_TARGETLENGTH_MIN);
				PyModule_AddIntConstant(mod, "TARGETLENGTH_MAX", ZSTD_TARGETLENGTH_MAX);

				PyModule_AddIntConstant(mod, "STRATEGY_FAST", ZSTD_fast);
				PyModule_AddIntConstant(mod, "STRATEGY_DFAST", ZSTD_dfast);
				PyModule_AddIntConstant(mod, "STRATEGY_GREEDY", ZSTD_greedy);
				PyModule_AddIntConstant(mod, "STRATEGY_LAZY", ZSTD_lazy);
				PyModule_AddIntConstant(mod, "STRATEGY_LAZY2", ZSTD_lazy2);
				PyModule_AddIntConstant(mod, "STRATEGY_BTLAZY2", ZSTD_btlazy2);
				PyModule_AddIntConstant(mod, "STRATEGY_BTOPT", ZSTD_btopt);
				}