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/*
* Copyright (C) 1998 NCSA
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Thursday, April 16, 1998
*/
#ifndef _H5Zpublic_H
#define _H5Zpublic_H
/*
* Compression methods. Method zero means no compression. Methods 1 through
* 15 are defined by the library. Methods 16-255 are user-defined.
*/
typedef int H5Z_method_t;
#define H5Z_NONE 0 /*no compression, must be zero */
#define H5Z_DEFLATE 1 /*deflation like gzip */
#define H5Z_RES_2 2 /*reserved for internal use */
#define H5Z_RES_3 3 /*reserved for internal use */
#define H5Z_RES_4 4 /*reserved for internal use */
#define H5Z_RES_5 5 /*reserved for internal use */
#define H5Z_RES_6 6 /*reserved for internal use */
#define H5Z_RES_7 7 /*reserved for internal use */
#define H5Z_RES_8 8 /*reserved for internal use */
#define H5Z_RES_9 9 /*reserved for internal use */
#define H5Z_RES_10 10 /*reserved for internal use */
#define H5Z_RES_11 11 /*reserved for internal use */
#define H5Z_RES_12 12 /*reserved for internal use */
#define H5Z_RES_13 13 /*reserved for internal use */
#define H5Z_RES_14 14 /*reserved for internal use */
#define H5Z_RES_15 15 /*reserved for internal use */
/* user-defined 16-255 */
#define H5Z_USERDEF_MIN 16 /*first user-defined method */
#define H5Z_USERDEF_MAX 255 /*last user-defined method */
/*
* A compression function takes some configuration data which comes from the
* compression message, namely FLAGS, CD_SIZE, and CLIENT_DATA. It should
* read SRC_NBYTES from SRC and compress them into at most DST_NBYTES of DST.
* If the compressed data would be larger than DST_NBYTES the function should
* return a value greater than or equal to DST_NBYTES. On failure the
* function may return zero.
*
* The uncompression function is the inverse of compression and takes the
* same arguments. The SRC_NBYTES argument is the number of compressed bytes
* in SRC. The function should uncompress SRC into DST. For redundancy,
* DST_NBYTES contains the size of the DST buffer although if the algorithm
* is operating properly and the file has not been corrupted the uncompressed
* data will never be larger than DST_NBYTES. The function should return the
* number of bytes in the DST buffer or zero on failure. Failure includes
* the overflow of the DST buffer.
*/
typedef size_t (*H5Z_func_t)(unsigned int flags, size_t cd_size,
const void *client_data, size_t src_nbytes,
const void *src, size_t dst_nbytes,
void *dst/*out*/);
#ifdef __cplusplus
extern "C" {
#endif
herr_t H5Zregister (H5Z_method_t method, const char *name, H5Z_func_t compress,
H5Z_func_t uncompress);
#ifdef __cplusplus
}
#endif
#endif
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