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zutil.h
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00001 /* zutil.h -- internal interface and configuration of the compression library
00002  * Copyright (C) 1995-2005 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 3.10 2005/08/04 19:14:14 tor%cs.brown.edu Exp $ */
00012 
00013 #ifndef ZUTIL_H
00014 #define ZUTIL_H
00015 
00016 #define ZLIB_INTERNAL
00017 #include "zlib.h"
00018 
00019 #ifdef STDC
00020 #  ifndef _WIN32_WCE
00021 #    include <stddef.h>
00022 #  endif
00023 #  include <string.h>
00024 #  include <stdlib.h>
00025 #endif
00026 #ifdef NO_ERRNO_H
00027 #   ifdef _WIN32_WCE
00028       /* The Microsoft C Run-Time Library for Windows CE doesn't have
00029        * errno.  We define it as a global variable to simplify porting.
00030        * Its value is always 0 and should not be used.  We rename it to
00031        * avoid conflict with other libraries that use the same workaround.
00032        */
00033 #     define errno z_errno
00034 #   endif
00035     extern int errno;
00036 #else
00037 #  ifndef _WIN32_WCE
00038 #    include <errno.h>
00039 #  endif
00040 #endif
00041 
00042 #ifndef local
00043 #  define local static
00044 #endif
00045 /* compile with -Dlocal if your debugger can't find static symbols */
00046 
00047 typedef unsigned char  uch;
00048 typedef uch FAR uchf;
00049 typedef unsigned short ush;
00050 typedef ush FAR ushf;
00051 typedef unsigned long  ulg;
00052 
00053 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
00054 /* (size given to avoid silly warnings with Visual C++) */
00055 
00056 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
00057 
00058 #define ERR_RETURN(strm,err) \
00059   return (strm->msg = (char*)ERR_MSG(err), (err))
00060 /* To be used only when the state is known to be valid */
00061 
00062         /* common constants */
00063 
00064 #ifndef DEF_WBITS
00065 #  define DEF_WBITS MAX_WBITS
00066 #endif
00067 /* default windowBits for decompression. MAX_WBITS is for compression only */
00068 
00069 #if MAX_MEM_LEVEL >= 8
00070 #  define DEF_MEM_LEVEL 8
00071 #else
00072 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
00073 #endif
00074 /* default memLevel */
00075 
00076 #define STORED_BLOCK 0
00077 #define STATIC_TREES 1
00078 #define DYN_TREES    2
00079 /* The three kinds of block type */
00080 
00081 #define MIN_MATCH  3
00082 #define MAX_MATCH  258
00083 /* The minimum and maximum match lengths */
00084 
00085 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
00086 
00087         /* target dependencies */
00088 
00089 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
00090 #  define OS_CODE  0x00
00091 #  if defined(__TURBOC__) || defined(__BORLANDC__)
00092 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
00093        /* Allow compilation with ANSI keywords only enabled */
00094        void _Cdecl farfree( void *block );
00095        void *_Cdecl farmalloc( unsigned long nbytes );
00096 #    else
00097 #      include <alloc.h>
00098 #    endif
00099 #  else /* MSC or DJGPP */
00100 #    include <malloc.h>
00101 #  endif
00102 #endif
00103 
00104 #ifdef AMIGA
00105 #  define OS_CODE  0x01
00106 #endif
00107 
00108 #if defined(VAXC) || defined(VMS)
00109 #  define OS_CODE  0x02
00110 #  define F_OPEN(name, mode) \
00111      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
00112 #endif
00113 
00114 #if defined(ATARI) || defined(atarist)
00115 #  define OS_CODE  0x05
00116 #endif
00117 
00118 #ifdef OS2
00119 #  define OS_CODE  0x06
00120 #  ifdef M_I86
00121      #include <malloc.h>
00122 #  endif
00123 #endif
00124 
00125 #if defined(MACOS) || defined(TARGET_OS_MAC)
00126 #  define OS_CODE  0x07
00127 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
00128 #    include <unix.h> /* for fdopen */
00129 #  else
00130 #    ifndef fdopen
00131 #      define fdopen(fd,mode) NULL /* No fdopen() */
00132 #    endif
00133 #  endif
00134 #endif
00135 
00136 #ifdef TOPS20
00137 #  define OS_CODE  0x0a
00138 #endif
00139 
00140 #ifdef WIN32
00141 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
00142 #    define OS_CODE  0x0b
00143 #  endif
00144 #endif
00145 
00146 #ifdef __50SERIES /* Prime/PRIMOS */
00147 #  define OS_CODE  0x0f
00148 #endif
00149 
00150 #if defined(_BEOS_) || defined(RISCOS)
00151 #  define fdopen(fd,mode) NULL /* No fdopen() */
00152 #endif
00153 
00154 #if (defined(_MSC_VER) && (_MSC_VER > 600))
00155 #  if defined(_WIN32_WCE)
00156 #    define fdopen(fd,mode) NULL /* No fdopen() */
00157 #    ifndef _PTRDIFF_T_DEFINED
00158        typedef int ptrdiff_t;
00159 #      define _PTRDIFF_T_DEFINED
00160 #    endif
00161 #  else
00162 #    define fdopen(fd,type)  _fdopen(fd,type)
00163 #  endif
00164 #endif
00165 
00166         /* common defaults */
00167 
00168 #ifndef OS_CODE
00169 #  define OS_CODE  0x03  /* assume Unix */
00170 #endif
00171 
00172 #ifndef F_OPEN
00173 #  define F_OPEN(name, mode) fopen((name), (mode))
00174 #endif
00175 
00176          /* functions */
00177 
00178 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
00179 #  ifndef HAVE_VSNPRINTF
00180 #    define HAVE_VSNPRINTF
00181 #  endif
00182 #endif
00183 #if defined(__CYGWIN__)
00184 #  ifndef HAVE_VSNPRINTF
00185 #    define HAVE_VSNPRINTF
00186 #  endif
00187 #endif
00188 #ifndef HAVE_VSNPRINTF
00189 #  ifdef MSDOS
00190      /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
00191         but for now we just assume it doesn't. */
00192 #    define NO_vsnprintf
00193 #  endif
00194 #  ifdef __TURBOC__
00195 #    define NO_vsnprintf
00196 #  endif
00197 #  ifdef WIN32
00198      /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
00199 #    if !defined(vsnprintf) && !defined(NO_vsnprintf)
00200 #      define vsnprintf _vsnprintf
00201 #    endif
00202 #  endif
00203 #  ifdef __SASC
00204 #    define NO_vsnprintf
00205 #  endif
00206 #endif
00207 #ifdef VMS
00208 #  define NO_vsnprintf
00209 #endif
00210 
00211 #if defined(pyr)
00212 #  define NO_MEMCPY
00213 #endif
00214 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
00215  /* Use our own functions for small and medium model with MSC <= 5.0.
00216   * You may have to use the same strategy for Borland C (untested).
00217   * The __SC__ check is for Symantec.
00218   */
00219 #  define NO_MEMCPY
00220 #endif
00221 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
00222 #  define HAVE_MEMCPY
00223 #endif
00224 #ifdef HAVE_MEMCPY
00225 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
00226 #    define zmemcpy _fmemcpy
00227 #    define zmemcmp _fmemcmp
00228 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
00229 #  else
00230 #    define zmemcpy memcpy
00231 #    define zmemcmp memcmp
00232 #    define zmemzero(dest, len) memset(dest, 0, len)
00233 #  endif
00234 #else
00235    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
00236    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
00237    extern void zmemzero OF((Bytef* dest, uInt len));
00238 #endif
00239 
00240 /* Diagnostic functions */
00241 #ifdef DEBUG
00242 #  include <stdio.h>
00243    extern int z_verbose;
00244    extern void z_error    OF((char *m));
00245 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
00246 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
00247 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
00248 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
00249 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
00250 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
00251 #else
00252 #  define Assert(cond,msg)
00253 #  define Trace(x)
00254 #  define Tracev(x)
00255 #  define Tracevv(x)
00256 #  define Tracec(c,x)
00257 #  define Tracecv(c,x)
00258 #endif
00259 
00260 
00261 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
00262 void   zcfree  OF((voidpf opaque, voidpf ptr));
00263 
00264 #define ZALLOC(strm, items, size) \
00265            (*((strm)->zalloc))((strm)->opaque, (items), (size))
00266 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
00267 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
00268 
00269 #endif /* ZUTIL_H */