lib/zlib/zutil.h

/* zutil.h -- internal interface and configuration of the compression library
 * Copyright (C) 1995-2005 Jean-loup Gailly.
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

/* WARNING: this file should *not* be used by applications. It is
   part of the implementation of the compression library and is
   subject to change. Applications should only use zlib.h.
 */

/* @(#) $Id$ */

#ifndef ZUTIL_H
#define ZUTIL_H

#define ZLIB_INTERNAL
#include "zlib.h"

#ifdef STDC
#  ifndef _WIN32_WCE
#    include <stddef.h>
#  endif
#  include <string.h>
#  include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
#   ifdef _WIN32_WCE
      /* The Microsoft C Run-Time Library for Windows CE doesn't have
       * errno.  We define it as a global variable to simplify porting.
       * Its value is always 0 and should not be used.  We rename it to
       * avoid conflict with other libraries that use the same workaround.
       */
#     define errno z_errno
#   endif
    extern int errno;
#else
#  ifndef _WIN32_WCE
#    include <errno.h>
#  endif
#endif

#ifndef local
#  define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */

typedef unsigned char  uch;
typedef uch FAR uchf;
typedef unsigned short ush;
typedef ush FAR ushf;
typedef unsigned long  ulg;

extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */

#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]

#define ERR_RETURN(strm,err) \
  return (strm->msg = (char*)ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */

        /* common constants */

#ifndef DEF_WBITS
#  define DEF_WBITS MAX_WBITS
#endif
/* default windowBits for decompression. MAX_WBITS is for compression only */

#if MAX_MEM_LEVEL >= 8
#  define DEF_MEM_LEVEL 8
#else
#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
#endif
/* default memLevel */

#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES    2
/* The three kinds of block type */

#define MIN_MATCH  3
#define MAX_MATCH  258
/* The minimum and maximum match lengths */

	 /* functions */
#ifdef CONFIG_GZIP_COMPRESSED
#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
#  define OS_CODE  0x03  /* assume Unix */
#endif

#include <linux/string.h>
#define zmemcpy memcpy
#define zmemcmp memcmp
#define zmemzero(dest, len) memset(dest, 0, len)

/* Diagnostic functions */
#ifdef DEBUG
/* Not valid for U-Boot
#  include <stdio.h> */
   extern int z_verbose;
   extern void z_error    OF((char *m));
#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
#else
#  define Assert(cond,msg)
#  define Trace(x)
#  define Tracev(x)
#  define Tracevv(x)
#  define Tracec(c,x)
#  define Tracecv(c,x)
#endif

voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void   zcfree  OF((voidpf opaque, voidpf ptr, unsigned size));

#define ZALLOC(strm, items, size) \
           (*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr), 0)
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}

#endif /* ZUTIL_H */