zutil.h revision 206002 
1/* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-2010 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#  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
21#    include <stddef.h>
22#  endif
23#  include <string.h>
24#  include <stdlib.h>
25#endif
26
27#ifndef local
28#  define local static
29#endif
30/* compile with -Dlocal if your debugger can't find static symbols */
31
32typedef unsigned char  uch;
33typedef uch FAR uchf;
34typedef unsigned short ush;
35typedef ush FAR ushf;
36typedef unsigned long  ulg;
37
38extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
39/* (size given to avoid silly warnings with Visual C++) */
40
41#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
42
43#define ERR_RETURN(strm,err) \
44  return (strm->msg = (char*)ERR_MSG(err), (err))
45/* To be used only when the state is known to be valid */
46
47        /* common constants */
48
49#ifndef DEF_WBITS
50#  define DEF_WBITS MAX_WBITS
51#endif
52/* default windowBits for decompression. MAX_WBITS is for compression only */
53
54#if MAX_MEM_LEVEL >= 8
55#  define DEF_MEM_LEVEL 8
56#else
57#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
58#endif
59/* default memLevel */
60
61#define STORED_BLOCK 0
62#define STATIC_TREES 1
63#define DYN_TREES    2
64/* The three kinds of block type */
65
66#define MIN_MATCH  3
67#define MAX_MATCH  258
68/* The minimum and maximum match lengths */
69
70#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
71
72        /* target dependencies */
73
74#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
75#  define OS_CODE  0x00
76#  if defined(__TURBOC__) || defined(__BORLANDC__)
77#    if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
78       /* Allow compilation with ANSI keywords only enabled */
79       void _Cdecl farfree( void *block );
80       void *_Cdecl farmalloc( unsigned long nbytes );
81#    else
82#      include <alloc.h>
83#    endif
84#  else /* MSC or DJGPP */
85#    include <malloc.h>
86#  endif
87#endif
88
89#ifdef AMIGA
90#  define OS_CODE  0x01
91#endif
92
93#if defined(VAXC) || defined(VMS)
94#  define OS_CODE  0x02
95#  define F_OPEN(name, mode) \
96     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
97#endif
98
99#if defined(ATARI) || defined(atarist)
100#  define OS_CODE  0x05
101#endif
102
103#ifdef OS2
104#  define OS_CODE  0x06
105#  ifdef M_I86
106#    include <malloc.h>
107#  endif
108#endif
109
110#if defined(MACOS) || defined(TARGET_OS_MAC)
111#  define OS_CODE  0x07
112#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
113#    include <unix.h> /* for fdopen */
114#  else
115#    ifndef fdopen
116#      define fdopen(fd,mode) NULL /* No fdopen() */
117#    endif
118#  endif
119#endif
120
121#ifdef TOPS20
122#  define OS_CODE  0x0a
123#endif
124
125#ifdef WIN32
126#  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
127#    define OS_CODE  0x0b
128#  endif
129#endif
130
131#ifdef __50SERIES /* Prime/PRIMOS */
132#  define OS_CODE  0x0f
133#endif
134
135#if defined(_BEOS_) || defined(RISCOS)
136#  define fdopen(fd,mode) NULL /* No fdopen() */
137#endif
138
139#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
140#  if defined(_WIN32_WCE)
141#    define fdopen(fd,mode) NULL /* No fdopen() */
142#    ifndef _PTRDIFF_T_DEFINED
143       typedef int ptrdiff_t;
144#      define _PTRDIFF_T_DEFINED
145#    endif
146#  else
147#    define fdopen(fd,type)  _fdopen(fd,type)
148#  endif
149#endif
150
151#if defined(__BORLANDC__)
152  #pragma warn -8004
153  #pragma warn -8008
154  #pragma warn -8066
155#endif
156
157#if _LARGEFILE64_SOURCE == 1 && _LFS64_LARGEFILE == 1
158#  define z_off64_t off64_t
159#else
160#  define z_off64_t z_off_t
161#endif
162
163/* provide prototypes for these when building zlib without LFS */
164#if _LARGEFILE64_SOURCE != 1 || _LFS64_LARGEFILE != 1
165    ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
166    ZEXTERN off_t ZEXPORT gzseek64 OF((gzFile, off_t, int));
167    ZEXTERN off_t ZEXPORT gztell64 OF((gzFile));
168    ZEXTERN off_t ZEXPORT gzoffset64 OF((gzFile));
169    ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, off_t));
170    ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, off_t));
171#endif
172
173        /* common defaults */
174
175#ifndef OS_CODE
176#  define OS_CODE  0x03  /* assume Unix */
177#endif
178
179#ifndef F_OPEN
180#  define F_OPEN(name, mode) fopen((name), (mode))
181#endif
182
183         /* functions */
184
185#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
186#  ifndef HAVE_VSNPRINTF
187#    define HAVE_VSNPRINTF
188#  endif
189#endif
190#if defined(__CYGWIN__)
191#  ifndef HAVE_VSNPRINTF
192#    define HAVE_VSNPRINTF
193#  endif
194#endif
195#ifndef HAVE_VSNPRINTF
196#  ifdef MSDOS
197     /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
198        but for now we just assume it doesn't. */
199#    define NO_vsnprintf
200#  endif
201#  ifdef __TURBOC__
202#    define NO_vsnprintf
203#  endif
204#  ifdef WIN32
205     /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
206#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
207#      if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
208#         define vsnprintf _vsnprintf
209#      endif
210#    endif
211#  endif
212#  ifdef __SASC
213#    define NO_vsnprintf
214#  endif
215#endif
216#ifdef VMS
217#  define NO_vsnprintf
218#endif
219
220#if defined(pyr)
221#  define NO_MEMCPY
222#endif
223#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
224 /* Use our own functions for small and medium model with MSC <= 5.0.
225  * You may have to use the same strategy for Borland C (untested).
226  * The __SC__ check is for Symantec.
227  */
228#  define NO_MEMCPY
229#endif
230#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
231#  define HAVE_MEMCPY
232#endif
233#ifdef HAVE_MEMCPY
234#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
235#    define zmemcpy _fmemcpy
236#    define zmemcmp _fmemcmp
237#    define zmemzero(dest, len) _fmemset(dest, 0, len)
238#  else
239#    define zmemcpy memcpy
240#    define zmemcmp memcmp
241#    define zmemzero(dest, len) memset(dest, 0, len)
242#  endif
243#else
244   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
245   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
246   extern void zmemzero OF((Bytef* dest, uInt len));
247#endif
248
249/* Diagnostic functions */
250#ifdef DEBUG
251#  include <stdio.h>
252   extern int z_verbose;
253   extern void z_error    OF((char *m));
254#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
255#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
256#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
257#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
258#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
259#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
260#else
261#  define Assert(cond,msg)
262#  define Trace(x)
263#  define Tracev(x)
264#  define Tracevv(x)
265#  define Tracec(c,x)
266#  define Tracecv(c,x)
267#endif
268
269
270voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
271void   zcfree  OF((voidpf opaque, voidpf ptr));
272
273#define ZALLOC(strm, items, size) \
274           (*((strm)->zalloc))((strm)->opaque, (items), (size))
275#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
276#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
277
278#endif /* ZUTIL_H */
279