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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF.  The full HDF copyright notice, including       *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at      *
 * http://hdfgroup.org/products/hdf4/doc/Copyright.html.  If you do not have *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/* $Id: cszip.h 5108 2008-10-22 18:49:22Z bmribler $ */

/*-----------------------------------------------------------------------------
  * File:    cszip.h
  * Purpose: Header file for szip encoding information.
  * Dependencies: should only be included from hcompi.h
  * Invokes: none
  * Contents: Structures & definitions for szip encoding.  This header
  *              should only be included in hcomp.c and cszip.c.
  * Structure definitions:
  * Constant definitions:
  *---------------------------------------------------------------------------*/

/* avoid re-inclusion */
#ifndef __CSZIP_H
#define __CSZIP_H

#if defined c_plusplus || defined __cplusplus
extern      "C"
{
#endif                          /* c_plusplus || __cplusplus */

/* Special parameters for szip compression */
/* [These are aliases for the similar definitions in ricehdf.h header file] */
#define H4_SZ_ALLOW_K13_OPTION_MASK     1
#define H4_SZ_CHIP_OPTION_MASK          2
#define H4_SZ_EC_OPTION_MASK            4
#define H4_SZ_LSB_OPTION_MASK           8
#define H4_SZ_MSB_OPTION_MASK           16
#define H4_SZ_NN_OPTION_MASK            32
#define H4_SZ_RAW_OPTION_MASK           128

/*
    ** from cszip.c
  */

     extern int32 HCPcszip_stread
                 (accrec_t * rec);

     extern int32 HCPcszip_stwrite
                 (accrec_t * rec);

     extern int32 HCPcszip_seek
                 (accrec_t * access_rec, int32 offset, int origin);

     extern int32 HCPcszip_inquire
                 (accrec_t * access_rec, int32 *pfile_id, uint16 *ptag, 
uint16 *pref,
                int32 *plength, int32 *poffset, int32 *pposn, int16 *paccess,
                  int16 *pspecial);

     extern int32 HCPcszip_read
                 (accrec_t * access_rec, int32 length, void * data);

     extern int32 HCPcszip_write
                 (accrec_t * access_rec, int32 length, const void * data);

     extern intn HCPcszip_endaccess
                 (accrec_t * access_rec);

     extern intn HCPsetup_szip_parms
                 ( comp_info *c_info, int32 nt, int32 ncomp, int32 ndims, int32 *dims, int32 *cdims);

#if defined c_plusplus || defined __cplusplus
}
#endif                          /* c_plusplus || __cplusplus */


/* SZIP [en|de]coding information */
typedef struct
{
     int32       offset;    /* offset in the file */
     uint8       *buffer;   /* buffer for storing SZIP bytes */
     int32       buffer_pos;
     int32       buffer_size;
     int32 bits_per_pixel;
     int32 options_mask;
     int32 pixels;
     int32 pixels_per_block;
     int32 pixels_per_scanline;
     enum
       {
           SZIP_INIT, SZIP_RUN,  SZIP_TERM
       }
     szip_state;                  /* state of the buffer storage */
     enum { SZIP_CLEAN, SZIP_DIRTY } szip_dirty;
}
comp_coder_szip_info_t;

#define SZ_H4_REV_2 0x10000   /* special bit to signal revised format */

#ifndef CSZIP_MASTER
extern funclist_t cszip_funcs;   /* functions to perform szip encoding */
#else
funclist_t  cszip_funcs =
{                               /* functions to perform szip encoding */
     HCPcszip_stread,
     HCPcszip_stwrite,
     HCPcszip_seek,
     HCPcszip_inquire,
     HCPcszip_read,
     HCPcszip_write,
     HCPcszip_endaccess
};
#endif

#endif /* __CSZIP_H */