512cbe8c10
By default, section sizes are 4x window size. This new setting allow manual selection of section sizes. The larger they are, the (slightly) better the compression ratio, but also the higher the memory allocation cost, and eventually the lesser the nb of possible threads, since each section is compressed by a single thread. It also introduces a prototype to set generic parameters, ZSTDMT_setMTCtxParameter() The idea is that it's possible to add enums to extend the list of parameters that can be set this way. This is more long-term oriented than a fixed-size struct. Consider it as a test.
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/**
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* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#ifndef FILEIO_H_23981798732
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#define FILEIO_H_23981798732
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#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_compressionParameters */
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#include "zstd.h" /* ZSTD_compressionParameters */
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/* *************************************
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* Special i/o constants
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**************************************/
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#define stdinmark "/*stdin*\\"
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#define stdoutmark "/*stdout*\\"
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#ifdef _WIN32
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# define nulmark "nul"
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#else
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# define nulmark "/dev/null"
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#endif
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/*-*************************************
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* Parameters
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***************************************/
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void FIO_overwriteMode(void);
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void FIO_setNotificationLevel(unsigned level);
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void FIO_setSparseWrite(unsigned sparse); /**< 0: no sparse; 1: disable on stdout; 2: always enabled */
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void FIO_setDictIDFlag(unsigned dictIDFlag);
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void FIO_setChecksumFlag(unsigned checksumFlag);
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void FIO_setRemoveSrcFile(unsigned flag);
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void FIO_setMemLimit(unsigned memLimit);
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void FIO_setNbThreads(unsigned nbThreads);
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void FIO_setBlockSize(unsigned blockSize);
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/*-*************************************
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* Single File functions
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***************************************/
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/** FIO_compressFilename() :
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@return : 0 == ok; 1 == pb with src file. */
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int FIO_compressFilename (const char* outfilename, const char* infilename, const char* dictFileName,
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int compressionLevel, ZSTD_compressionParameters* comprParams);
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/** FIO_decompressFilename() :
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@return : 0 == ok; 1 == pb with src file. */
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int FIO_decompressFilename (const char* outfilename, const char* infilename, const char* dictFileName);
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/*-*************************************
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* Multiple File functions
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***************************************/
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/** FIO_compressMultipleFilenames() :
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@return : nb of missing files */
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int FIO_compressMultipleFilenames(const char** srcNamesTable, unsigned nbFiles,
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const char* suffix,
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const char* dictFileName, int compressionLevel,
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ZSTD_compressionParameters* comprParams);
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/** FIO_decompressMultipleFilenames() :
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@return : nb of missing or skipped files */
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int FIO_decompressMultipleFilenames(const char** srcNamesTable, unsigned nbFiles,
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const char* suffix,
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const char* dictFileName);
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#if defined (__cplusplus)
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}
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#endif
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#endif /* FILEIO_H_23981798732 */
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