zstd/zlibWrapper/zstd_zlibwrapper.h

/**
 * Copyright (c) 2016-present, Przemyslaw Skibinski, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#ifndef ZSTD_ZLIBWRAPPER_H
#define ZSTD_ZLIBWRAPPER_H

#if defined (__cplusplus)
extern "C" {
#endif


#define Z_PREFIX
#include <zlib.h>

#if !defined(z_const)
#if ZLIB_VERNUM >= 0x1260
    #define z_const const
#else
    #define z_const
#endif
#endif

/* returns a string with version of zstd library */
const char * zstdVersion(void);


/* COMPRESSION */
/* enables/disables zstd compression during runtime */
void ZWRAP_useZSTDcompression(int turn_on);

/* check if zstd compression is turned on */
int ZWRAP_isUsingZSTDcompression(void);

/* Changes a pledged source size for a given compression stream.
   It will change ZSTD compression parameters what may improve compression speed and/or ratio.
   The function should be called just after deflateInit() or deflateReset() and before deflate() or deflateSetDictionary().
   It's only helpful when data is compressed in blocks. 
   There will be no change in case of deflateInit() or deflateReset() immediately followed by deflate(strm, Z_FINISH) 
   as this case is automatically detected.  */
int ZWRAP_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize);


/* DECOMPRESSION */
typedef enum { ZWRAP_FORCE_ZLIB, ZWRAP_AUTO } ZWRAP_decompress_type;

/* enables/disables automatic recognition of zstd/zlib compressed data during runtime */
void ZWRAP_setDecompressionType(ZWRAP_decompress_type type);

/* check zstd decompression type */
ZWRAP_decompress_type ZWRAP_getDecompressionType(void);





#if defined (__cplusplus)
}
#endif

#endif /* ZSTD_ZLIBWRAPPER_H */