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# zutil.h

    00001 /* zutil.h -- internal interface and configuration of the compression library
    00002  * Copyright (C) 1995-2002 Jean-loup Gailly.
    00003  * For conditions of distribution and use, see copyright notice in zlib.h
    00004  */
    00005
    00006 /* WARNING: this file should *not* be used by applications. It is
    00007    part of the implementation of the compression library and is
    00008    subject to change. Applications should only use zlib.h.
    00009  */
    00010
    00011 /* @(#) $Id: zutil.h,v 1.1 2003/11/09 01:37:56 gabest Exp $ */
    00012
    00013 #ifndef _Z_UTIL_H
    00014 #define _Z_UTIL_H
    00015
    00016 #include "zlib.h"
    00017
    00018 #ifdef STDC
    00019 #  include <stddef.h>
    00020 #  include <string.h>
    00021 #  include <stdlib.h>
    00022 #endif
    00023 #ifdef NO_ERRNO_H
    00024     extern int errno;
    00025 #else
    00026 #   include <errno.h>
    00027 #endif
    00028
    00029 #ifndef local
    00030 #  define local static
    00031 #endif
    00032 /* compile with -Dlocal if your debugger can't find static symbols */
    00033
    00034 typedef unsigned char  uch;
    00035 typedef uch FAR uchf;
    00036 typedef unsigned short ush;
    00037 typedef ush FAR ushf;
    00038 typedef unsigned long  ulg;
    00039
    00040 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
    00041 /* (size given to avoid silly warnings with Visual C++) */
    00042
    00043 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
    00044
    00045 #define ERR_RETURN(strm,err) \
    00046   return (strm->msg = (char*)ERR_MSG(err), (err))
    00047 /* To be used only when the state is known to be valid */
    00048
    00049         /* common constants */
    00050
    00051 #ifndef DEF_WBITS
    00052 #  define DEF_WBITS MAX_WBITS
    00053 #endif
    00054 /* default windowBits for decompression. MAX_WBITS is for compression only */
    00055
    00056 #if MAX_MEM_LEVEL >= 8
    00057 #  define DEF_MEM_LEVEL 8
    00058 #else
    00059 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
    00060 #endif
    00061 /* default memLevel */
    00062
    00063 #define STORED_BLOCK 0
    00064 #define STATIC_TREES 1
    00065 #define DYN_TREES    2
    00066 /* The three kinds of block type */
    00067
    00068 #define MIN_MATCH  3
    00069 #define MAX_MATCH  258
    00070 /* The minimum and maximum match lengths */
    00071
    00072 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
    00073
    00074         /* target dependencies */
    00075
    00076 #ifdef MSDOS
    00077 #  define OS_CODE  0x00
    00078 #  if defined(__TURBOC__) || defined(__BORLANDC__)
    00079 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
    00080        /* Allow compilation with ANSI keywords only enabled */
    00081        void _Cdecl farfree( void *block );
    00082        void *_Cdecl farmalloc( unsigned long nbytes );
    00083 #    else
    00084 #     include <alloc.h>
    00085 #    endif
    00086 #  else /* MSC or DJGPP */
    00087 #    include <malloc.h>
    00088 #  endif
    00089 #endif
    00090
    00091 #ifdef OS2
    00092 #  define OS_CODE  0x06
    00093 #endif
    00094
    00095 #ifdef WIN32 /* Window 95 & Windows NT */
    00096 #  define OS_CODE  0x0b
    00097 #endif
    00098
    00099 #if defined(VAXC) || defined(VMS)
    00100 #  define OS_CODE  0x02
    00101 #  define F_OPEN(name, mode) \
    00102      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
    00103 #endif
    00104
    00105 #ifdef AMIGA
    00106 #  define OS_CODE  0x01
    00107 #endif
    00108
    00109 #if defined(ATARI) || defined(atarist)
    00110 #  define OS_CODE  0x05
    00111 #endif
    00112
    00113 #if defined(MACOS) || defined(TARGET_OS_MAC)
    00114 #  define OS_CODE  0x07
    00115 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
    00116 #    include <unix.h> /* for fdopen */
    00117 #  else
    00118 #    ifndef fdopen
    00119 #      define fdopen(fd,mode) NULL /* No fdopen() */
    00120 #    endif
    00121 #  endif
    00122 #endif
    00123
    00124 #ifdef __50SERIES /* Prime/PRIMOS */
    00125 #  define OS_CODE  0x0F
    00126 #endif
    00127
    00128 #ifdef TOPS20
    00129 #  define OS_CODE  0x0a
    00130 #endif
    00131
    00132 #if defined(_BEOS_) || defined(RISCOS)
    00133 #  define fdopen(fd,mode) NULL /* No fdopen() */
    00134 #endif
    00135
    00136 #if (defined(_MSC_VER) && (_MSC_VER > 600))
    00137 #  define fdopen(fd,type)  _fdopen(fd,type)
    00138 #endif
    00139
    00140
    00141         /* Common defaults */
    00142
    00143 #ifndef OS_CODE
    00144 #  define OS_CODE  0x03  /* assume Unix */
    00145 #endif
    00146
    00147 #ifndef F_OPEN
    00148 #  define F_OPEN(name, mode) fopen((name), (mode))
    00149 #endif
    00150
    00151          /* functions */
    00152
    00153 #ifdef HAVE_STRERROR
    00154    extern char *strerror OF((int));
    00155 #  define zstrerror(errnum) strerror(errnum)
    00156 #else
    00157 #  define zstrerror(errnum) ""
    00158 #endif
    00159
    00160 #if defined(pyr)
    00161 #  define NO_MEMCPY
    00162 #endif
    00163 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
    00164  /* Use our own functions for small and medium model with MSC <= 5.0.
    00165   * You may have to use the same strategy for Borland C (untested).
    00166   * The __SC__ check is for Symantec.
    00167   */
    00168 #  define NO_MEMCPY
    00169 #endif
    00170 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
    00171 #  define HAVE_MEMCPY
    00172 #endif
    00173 #ifdef HAVE_MEMCPY
    00174 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
    00175 #    define zmemcpy _fmemcpy
    00176 #    define zmemcmp _fmemcmp
    00177 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
    00178 #  else
    00179 #    define zmemcpy memcpy
    00180 #    define zmemcmp memcmp
    00181 #    define zmemzero(dest, len) memset(dest, 0, len)
    00182 #  endif
    00183 #else
    00184    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
    00185    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
    00186    extern void zmemzero OF((Bytef* dest, uInt len));
    00187 #endif
    00188
    00189 /* Diagnostic functions */
    00190 #ifdef DEBUG
    00191 #  include <stdio.h>
    00192    extern int z_verbose;
    00193    extern void z_error    OF((char *m));
    00194 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
    00195 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
    00196 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
    00197 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
    00198 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
    00199 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
    00200 #else
    00201 #  define Assert(cond,msg)
    00202 #  define Trace(x)
    00203 #  define Tracev(x)
    00204 #  define Tracevv(x)
    00205 #  define Tracec(c,x)
    00206 #  define Tracecv(c,x)
    00207 #endif
    00208
    00209
    00210 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
    00211                                        uInt len));
    00212 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
    00213 void   zcfree  OF((voidpf opaque, voidpf ptr));
    00214
    00215 #define ZALLOC(strm, items, size) \
    00216            (*((strm)->zalloc))((strm)->opaque, (items), (size))
    00217 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
    00218 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
    00219
    00220 #endif /* _Z_UTIL_H */