crosspoint-reader-mod/lib/uzlib/src/uzlib.h

/*
 * uzlib  -  tiny deflate/inflate library (deflate, gzip, zlib)
 *
 * Copyright (c) 2003 by Joergen Ibsen / Jibz
 * All Rights Reserved
 * http://www.ibsensoftware.com/
 *
 * Copyright (c) 2014-2018 by Paul Sokolovsky
 *
 * This software is provided 'as-is', without any express
 * or implied warranty.  In no event will the authors be
 * held liable for any damages arising from the use of
 * this software.
 *
 * Permission is granted to anyone to use this software
 * for any purpose, including commercial applications,
 * and to alter it and redistribute it freely, subject to
 * the following restrictions:
 *
 * 1. The origin of this software must not be
 *    misrepresented; you must not claim that you
 *    wrote the original software. If you use this
 *    software in a product, an acknowledgment in
 *    the product documentation would be appreciated
 *    but is not required.
 *
 * 2. Altered source versions must be plainly marked
 *    as such, and must not be misrepresented as
 *    being the original software.
 *
 * 3. This notice may not be removed or altered from
 *    any source distribution.
 */

#ifndef UZLIB_H_INCLUDED
#define UZLIB_H_INCLUDED

#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>

#ifdef __cplusplus
extern "C" {
#endif

#include "uzlib_conf.h"
#if UZLIB_CONF_DEBUG_LOG
#include <stdio.h>
#endif

/* calling convention */
#ifndef TINFCC
#ifdef __WATCOMC__
#define TINFCC __cdecl
#else
#define TINFCC
#endif
#endif

/* ok status, more data produced */
#define TINF_OK 0
/* end of compressed stream reached */
#define TINF_DONE 1
#define TINF_DATA_ERROR (-3)
#define TINF_CHKSUM_ERROR (-4)
#define TINF_DICT_ERROR (-5)

/* checksum types */
#define TINF_CHKSUM_NONE 0
#define TINF_CHKSUM_ADLER 1
#define TINF_CHKSUM_CRC 2

/* helper macros */
#define TINF_ARRAY_SIZE(arr) (sizeof(arr) / sizeof(*(arr)))

/* data structures */

typedef struct {
  unsigned short table[16];  /* table of code length counts */
  unsigned short trans[288]; /* code -> symbol translation table */
} TINF_TREE;

struct uzlib_uncomp {
  /* Pointer to the next byte in the input buffer */
  const unsigned char* source;
  /* Pointer to the next byte past the input buffer (source_limit = source + len) */
  const unsigned char* source_limit;
  /* If source_limit == NULL, or source >= source_limit, this function
     will be used to read next byte from source stream. The function may
     also return -1 in case of EOF (or irrecoverable error). Note that
     besides returning the next byte, it may also update source and
     source_limit fields, thus allowing for buffered operation. */
  int (*source_read_cb)(struct uzlib_uncomp* uncomp);

  unsigned int tag;
  unsigned int bitcount;

  /* Destination (output) buffer start */
  unsigned char* dest_start;
  /* Current pointer in dest buffer */
  unsigned char* dest;
  /* Pointer past the end of the dest buffer, similar to source_limit */
  unsigned char* dest_limit;

  /* Accumulating checksum */
  unsigned int checksum;
  char checksum_type;
  bool eof;

  int btype;
  int bfinal;
  unsigned int curlen;
  int lzOff;
  unsigned char* dict_ring;
  unsigned int dict_size;
  unsigned int dict_idx;

  TINF_TREE ltree; /* dynamic length/symbol tree */
  TINF_TREE dtree; /* dynamic distance tree */
};

#include "tinf_compat.h"

#define TINF_PUT(d, c)                                  \
  {                                                     \
    *d->dest++ = c;                                     \
    if (d->dict_ring) {                                 \
      d->dict_ring[d->dict_idx++] = c;                  \
      if (d->dict_idx == d->dict_size) d->dict_idx = 0; \
    }                                                   \
  }

unsigned char TINFCC uzlib_get_byte(TINF_DATA* d);

/* Decompression API */

void TINFCC uzlib_init(void);
void TINFCC uzlib_uncompress_init(TINF_DATA* d, void* dict, unsigned int dictLen);
int TINFCC uzlib_uncompress(TINF_DATA* d);
int TINFCC uzlib_uncompress_chksum(TINF_DATA* d);

int TINFCC uzlib_zlib_parse_header(TINF_DATA* d);
int TINFCC uzlib_gzip_parse_header(TINF_DATA* d);

/* Compression API */

typedef const uint8_t* uzlib_hash_entry_t;

struct uzlib_comp {
  unsigned char* outbuf;
  int outlen, outsize;
  unsigned long outbits;
  int noutbits;
  int comp_disabled;

  uzlib_hash_entry_t* hash_table;
  unsigned int hash_bits;
  unsigned int dict_size;
};

void TINFCC uzlib_compress(struct uzlib_comp* c, const uint8_t* src, unsigned slen);

#include "defl_static.h"

/* Checksum API */

/* prev_sum is previous value for incremental computation, 1 initially */
uint32_t TINFCC uzlib_adler32(const void* data, unsigned int length, uint32_t prev_sum);
/* crc is previous value for incremental computation, 0xffffffff initially */
uint32_t TINFCC uzlib_crc32(const void* data, unsigned int length, uint32_t crc);

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* UZLIB_H_INCLUDED */