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/Modules/zlib/zutil.h

http://unladen-swallow.googlecode.com/
C++ Header | 269 lines | 196 code | 39 blank | 34 comment | 30 complexity | 2730c61c8df16928ff7a9610fe7763b4 MD5 | raw file
  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
 47typedef unsigned char  uch;
 48typedef uch FAR uchf;
 49typedef unsigned short ush;
 50typedef ush FAR ushf;
 51typedef unsigned long  ulg;
 52
 53extern 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#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
 86
 87        /* target dependencies */
 88
 89#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
 90#  define OS_CODE  0x00
 91#  if defined(__TURBOC__) || defined(__BORLANDC__)
 92#    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
 93       /* Allow compilation with ANSI keywords only enabled */
 94       void _Cdecl farfree( void *block );
 95       void *_Cdecl farmalloc( unsigned long nbytes );
 96#    else
 97#      include <alloc.h>
 98#    endif
 99#  else /* MSC or DJGPP */
100#    include <malloc.h>
101#  endif
102#endif
103
104#ifdef AMIGA
105#  define OS_CODE  0x01
106#endif
107
108#if defined(VAXC) || defined(VMS)
109#  define OS_CODE  0x02
110#  define F_OPEN(name, mode) \
111     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
112#endif
113
114#if defined(ATARI) || defined(atarist)
115#  define OS_CODE  0x05
116#endif
117
118#ifdef OS2
119#  define OS_CODE  0x06
120#  ifdef M_I86
121     #include <malloc.h>
122#  endif
123#endif
124
125#if defined(MACOS) || defined(TARGET_OS_MAC)
126#  define OS_CODE  0x07
127#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
128#    include <unix.h> /* for fdopen */
129#  else
130#    ifndef fdopen
131#      define fdopen(fd,mode) NULL /* No fdopen() */
132#    endif
133#  endif
134#endif
135
136#ifdef TOPS20
137#  define OS_CODE  0x0a
138#endif
139
140#ifdef WIN32
141#  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
142#    define OS_CODE  0x0b
143#  endif
144#endif
145
146#ifdef __50SERIES /* Prime/PRIMOS */
147#  define OS_CODE  0x0f
148#endif
149
150#if defined(_BEOS_) || defined(RISCOS)
151#  define fdopen(fd,mode) NULL /* No fdopen() */
152#endif
153
154#if (defined(_MSC_VER) && (_MSC_VER > 600))
155#  if defined(_WIN32_WCE)
156#    define fdopen(fd,mode) NULL /* No fdopen() */
157#    ifndef _PTRDIFF_T_DEFINED
158       typedef int ptrdiff_t;
159#      define _PTRDIFF_T_DEFINED
160#    endif
161#  else
162#    define fdopen(fd,type)  _fdopen(fd,type)
163#  endif
164#endif
165
166        /* common defaults */
167
168#ifndef OS_CODE
169#  define OS_CODE  0x03  /* assume Unix */
170#endif
171
172#ifndef F_OPEN
173#  define F_OPEN(name, mode) fopen((name), (mode))
174#endif
175
176         /* functions */
177
178#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
179#  ifndef HAVE_VSNPRINTF
180#    define HAVE_VSNPRINTF
181#  endif
182#endif
183#if defined(__CYGWIN__)
184#  ifndef HAVE_VSNPRINTF
185#    define HAVE_VSNPRINTF
186#  endif
187#endif
188#ifndef HAVE_VSNPRINTF
189#  ifdef MSDOS
190     /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
191        but for now we just assume it doesn't. */
192#    define NO_vsnprintf
193#  endif
194#  ifdef __TURBOC__
195#    define NO_vsnprintf
196#  endif
197#  ifdef WIN32
198     /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
199#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
200#      define vsnprintf _vsnprintf
201#    endif
202#  endif
203#  ifdef __SASC
204#    define NO_vsnprintf
205#  endif
206#endif
207#ifdef VMS
208#  define NO_vsnprintf
209#endif
210
211#if defined(pyr)
212#  define NO_MEMCPY
213#endif
214#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
215 /* Use our own functions for small and medium model with MSC <= 5.0.
216  * You may have to use the same strategy for Borland C (untested).
217  * The __SC__ check is for Symantec.
218  */
219#  define NO_MEMCPY
220#endif
221#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
222#  define HAVE_MEMCPY
223#endif
224#ifdef HAVE_MEMCPY
225#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
226#    define zmemcpy _fmemcpy
227#    define zmemcmp _fmemcmp
228#    define zmemzero(dest, len) _fmemset(dest, 0, len)
229#  else
230#    define zmemcpy memcpy
231#    define zmemcmp memcmp
232#    define zmemzero(dest, len) memset(dest, 0, len)
233#  endif
234#else
235   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
236   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
237   extern void zmemzero OF((Bytef* dest, uInt len));
238#endif
239
240/* Diagnostic functions */
241#ifdef DEBUG
242#  include <stdio.h>
243   extern int z_verbose;
244   extern void z_error    OF((char *m));
245#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
246#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
247#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
248#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
249#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
250#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
251#else
252#  define Assert(cond,msg)
253#  define Trace(x)
254#  define Tracev(x)
255#  define Tracevv(x)
256#  define Tracec(c,x)
257#  define Tracecv(c,x)
258#endif
259
260
261voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
262void   zcfree  OF((voidpf opaque, voidpf ptr));
263
264#define ZALLOC(strm, items, size) \
265           (*((strm)->zalloc))((strm)->opaque, (items), (size))
266#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
267#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
268
269#endif /* ZUTIL_H */