lib/zlib/zutil.h

   1 /* zutil.h -- internal interface and configuration of the compression library
   2  * Copyright (C) 1995-2005 Jean-loup Gailly.
   3  * For conditions of distribution and use, see copyright notice in zlib.h
   4  */
   5
   6 /* WARNING: this file should *not* be used by applications. It is
   7    part of the implementation of the compression library and is
   8    subject to change. Applications should only use zlib.h.
   9  */
  10
  11 /* @(#) $Id$ */
  12
  13 #ifndef ZUTIL_H
  14 #define ZUTIL_H
  15
  16 #define ZLIB_INTERNAL
  17 #include "zlib.h"
  18
  19 #ifdef STDC
  20 #  ifndef _WIN32_WCE
  21 #    include <stddef.h>
  22 #  endif
  23 #  include <string.h>
  24 #  include <stdlib.h>
  25 #endif
  26 #ifdef NO_ERRNO_H
  27 #   ifdef _WIN32_WCE
  28       /* The Microsoft C Run-Time Library for Windows CE doesn't have
  29        * errno.  We define it as a global variable to simplify porting.
  30        * Its value is always 0 and should not be used.  We rename it to
  31        * avoid conflict with other libraries that use the same workaround.
  32        */
  33 #     define errno z_errno
  34 #   endif
  35     extern int errno;
  36 #else
  37 #  ifndef _WIN32_WCE
  38 #    include <errno.h>
  39 #  endif
  40 #endif
  41
  42 #ifndef local
  43 #  define local static
  44 #endif
  45 /* compile with -Dlocal if your debugger can't find static symbols */
  46
  47 typedef unsigned char  uch;
  48 typedef uch FAR uchf;
  49 typedef unsigned short ush;
  50 typedef ush FAR ushf;
  51 typedef unsigned long  ulg;
  52
  53 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  54 /* (size given to avoid silly warnings with Visual C++) */
  55
  56 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  57
  58 #define ERR_RETURN(strm,err) \
  59   return (strm->msg = (char*)ERR_MSG(err), (err))
  60 /* To be used only when the state is known to be valid */
  61
  62         /* common constants */
  63
  64 #ifndef DEF_WBITS
  65 #  define DEF_WBITS MAX_WBITS
  66 #endif
  67 /* default windowBits for decompression. MAX_WBITS is for compression only */
  68
  69 #if MAX_MEM_LEVEL >= 8
  70 #  define DEF_MEM_LEVEL 8
  71 #else
  72 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  73 #endif
  74 /* default memLevel */
  75
  76 #define STORED_BLOCK 0
  77 #define STATIC_TREES 1
  78 #define DYN_TREES    2
  79 /* The three kinds of block type */
  80
  81 #define MIN_MATCH  3
  82 #define MAX_MATCH  258
  83 /* The minimum and maximum match lengths */
  84
  85          /* functions */
  86 #ifdef CONFIG_GZIP_COMPRESSED
  87 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  88 #  define OS_CODE  0x03  /* assume Unix */
  89 #endif
  90
  91 #include <linux/string.h>
  92 #define zmemcpy memcpy
  93 #define zmemcmp memcmp
  94 #define zmemzero(dest, len) memset(dest, 0, len)
  95
  96 /* Diagnostic functions */
  97 #ifdef DEBUG
  98 /* Not valid for U-Boot
  99 #  include <stdio.h> */
 100    extern int z_verbose;
 101    extern void z_error    OF((char *m));
 102 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 103 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 104 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 105 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 106 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 107 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 108 #else
 109 #  define Assert(cond,msg)
 110 #  define Trace(x)
 111 #  define Tracev(x)
 112 #  define Tracevv(x)
 113 #  define Tracec(c,x)
 114 #  define Tracecv(c,x)
 115 #endif
 116
 117
 118 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 119 void   zcfree  OF((voidpf opaque, voidpf ptr, unsigned size));
 120
 121 #define ZALLOC(strm, items, size) \
 122            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 123 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr), 0)
 124 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 125
 126 #endif /* ZUTIL_H */