67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/**
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* Copyright (c) 2016-present, Przemyslaw Skibinski, 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 ZSTD_ZLIBWRAPPER_H
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#define ZSTD_ZLIBWRAPPER_H
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#if defined (__cplusplus)
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extern "C" {
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#endif
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#define Z_PREFIX
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#include <zlib.h>
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#if !defined(z_const)
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#if ZLIB_VERNUM >= 0x1260
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#define z_const const
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#else
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#define z_const
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#endif
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#endif
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/* returns a string with version of zstd library */
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const char * zstdVersion(void);
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/* COMPRESSION */
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/* enables/disables zstd compression during runtime */
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void ZWRAP_useZSTDcompression(int turn_on);
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/* check if zstd compression is turned on */
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int ZWRAP_isUsingZSTDcompression(void);
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/* Changes a pledged source size for a given compression stream.
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It will change ZSTD compression parameters what may improve compression speed and/or ratio.
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The function should be called just after deflateInit() or deflateReset() and before deflate() or deflateSetDictionary().
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It's only helpful when data is compressed in blocks.
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There will be no change in case of deflateInit() or deflateReset() immediately followed by deflate(strm, Z_FINISH)
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as this case is automatically detected. */
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int ZWRAP_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize);
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/* DECOMPRESSION */
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typedef enum { ZWRAP_FORCE_ZLIB, ZWRAP_AUTO } ZWRAP_decompress_type;
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/* enables/disables automatic recognition of zstd/zlib compressed data during runtime */
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void ZWRAP_setDecompressionType(ZWRAP_decompress_type type);
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/* check zstd decompression type */
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ZWRAP_decompress_type ZWRAP_getDecompressionType(void);
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#if defined (__cplusplus)
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}
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#endif
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#endif /* ZSTD_ZLIBWRAPPER_H */
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