zutil.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
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#if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ)
17#  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
18#else
19#  define ZLIB_INTERNAL
20#endif
21
22#include "zlib.h"
23
24#ifdef STDC
25#  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
26#    include <stddef.h>
27#  endif
28#  include <string.h>
29#  include <stdlib.h>
30#endif
31#ifdef NO_ERRNO_H
32#   ifdef _WIN32_WCE
33      /* The Microsoft C Run-Time Library for Windows CE doesn't have
34       * errno.  We define it as a global variable to simplify porting.
35       * Its value is always 0 and should not be used.  We rename it to
36       * avoid conflict with other libraries that use the same workaround.
37       */
38#     define errno z_errno
39#   endif
40    extern int errno;
41#else
42#  ifndef _WIN32_WCE
43#    include <errno.h>
44#  endif
45#endif
46
47#ifndef local
48#  define local static
49#endif
50/* compile with -Dlocal if your debugger can't find static symbols */
51
52typedef unsigned char  uch;
53typedef uch FAR uchf;
54typedef unsigned short ush;
55typedef ush FAR ushf;
56typedef unsigned long  ulg;
57
58extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
59/* (size given to avoid silly warnings with Visual C++) */
60
61#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
62
63#define ERR_RETURN(strm,err) \
64  return (strm->msg = (char*)ERR_MSG(err), (err))
65/* To be used only when the state is known to be valid */
66
67        /* common constants */
68
69#ifndef DEF_WBITS
70#  define DEF_WBITS MAX_WBITS
71#endif
72/* default windowBits for decompression. MAX_WBITS is for compression only */
73
74#if MAX_MEM_LEVEL >= 8
75#  define DEF_MEM_LEVEL 8
76#else
77#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
78#endif
79/* default memLevel */
80
81#define STORED_BLOCK 0
82#define STATIC_TREES 1
83#define DYN_TREES    2
84/* The three kinds of block type */
85
86#define MIN_MATCH  3
87#define MAX_MATCH  258
88/* The minimum and maximum match lengths */
89
90#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
91
92        /* target dependencies */
93
94#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
95#  define OS_CODE  0x00
96#  if defined(__TURBOC__) || defined(__BORLANDC__)
97#    if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
98       /* Allow compilation with ANSI keywords only enabled */
99       void _Cdecl farfree( void *block );
100       void *_Cdecl farmalloc( unsigned long nbytes );
101#    else
102#      include <alloc.h>
103#    endif
104#  else /* MSC or DJGPP */
105#    include <malloc.h>
106#  endif
107#endif
108
109#ifdef AMIGA
110#  define OS_CODE  0x01
111#endif
112
113#if defined(VAXC) || defined(VMS)
114#  define OS_CODE  0x02
115#  define F_OPEN(name, mode) \
116     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
117#endif
118
119#if defined(ATARI) || defined(atarist)
120#  define OS_CODE  0x05
121#endif
122
123#ifdef OS2
124#  define OS_CODE  0x06
125#  ifdef M_I86
126#    include <malloc.h>
127#  endif
128#endif
129
130#if defined(MACOS) || defined(TARGET_OS_MAC)
131#  define OS_CODE  0x07
132#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
133#    include <unix.h> /* for fdopen */
134#  else
135#    ifndef fdopen
136#      define fdopen(fd,mode) NULL /* No fdopen() */
137#    endif
138#  endif
139#endif
140
141#ifdef TOPS20
142#  define OS_CODE  0x0a
143#endif
144
145#ifdef WIN32
146#  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
147#    define OS_CODE  0x0b
148#  endif
149#endif
150
151#ifdef __50SERIES /* Prime/PRIMOS */
152#  define OS_CODE  0x0f
153#endif
154
155#if defined(_BEOS_) || defined(RISCOS)
156#  define fdopen(fd,mode) NULL /* No fdopen() */
157#endif
158
159#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
160#  if defined(_WIN32_WCE)
161#    define fdopen(fd,mode) NULL /* No fdopen() */
162#    ifndef _PTRDIFF_T_DEFINED
163       typedef int ptrdiff_t;
164#      define _PTRDIFF_T_DEFINED
165#    endif
166#  else
167#    define fdopen(fd,type)  _fdopen(fd,type)
168#  endif
169#endif
170
171#if defined(__BORLANDC__)
172  #pragma warn -8004
173  #pragma warn -8008
174  #pragma warn -8066
175#endif
176
177/* provide prototypes for these when building zlib without LFS */
178#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
179    ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
180    ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
181#endif
182
183        /* common defaults */
184
185#ifndef OS_CODE
186#  define OS_CODE  0x03  /* assume Unix */
187#endif
188
189#ifndef F_OPEN
190#  define F_OPEN(name, mode) fopen((name), (mode))
191#endif
192
193         /* functions */
194
195#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
196#  ifndef HAVE_VSNPRINTF
197#    define HAVE_VSNPRINTF
198#  endif
199#endif
200#if defined(__CYGWIN__)
201#  ifndef HAVE_VSNPRINTF
202#    define HAVE_VSNPRINTF
203#  endif
204#endif
205#ifndef HAVE_VSNPRINTF
206#  ifdef MSDOS
207     /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
208        but for now we just assume it doesn't. */
209#    define NO_vsnprintf
210#  endif
211#  ifdef __TURBOC__
212#    define NO_vsnprintf
213#  endif
214#  ifdef WIN32
215     /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
216#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
217#      if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
218#         define vsnprintf _vsnprintf
219#      endif
220#    endif
221#  endif
222#  ifdef __SASC
223#    define NO_vsnprintf
224#  endif
225#endif
226#ifdef VMS
227#  define NO_vsnprintf
228#endif
229
230#if defined(pyr)
231#  define NO_MEMCPY
232#endif
233#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
234 /* Use our own functions for small and medium model with MSC <= 5.0.
235  * You may have to use the same strategy for Borland C (untested).
236  * The __SC__ check is for Symantec.
237  */
238#  define NO_MEMCPY
239#endif
240#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
241#  define HAVE_MEMCPY
242#endif
243#ifdef HAVE_MEMCPY
244#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
245#    define zmemcpy _fmemcpy
246#    define zmemcmp _fmemcmp
247#    define zmemzero(dest, len) _fmemset(dest, 0, len)
248#  else
249#    define zmemcpy memcpy
250#    define zmemcmp memcmp
251#    define zmemzero(dest, len) memset(dest, 0, len)
252#  endif
253#else
254   void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
255   int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
256   void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
257#endif
258
259/* Diagnostic functions */
260#ifdef DEBUG
261#  include <stdio.h>
262   extern int ZLIB_INTERNAL z_verbose;
263   extern void ZLIB_INTERNAL z_error OF((char *m));
264#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
265#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
266#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
267#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
268#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
269#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
270#else
271#  define Assert(cond,msg)
272#  define Trace(x)
273#  define Tracev(x)
274#  define Tracevv(x)
275#  define Tracec(c,x)
276#  define Tracecv(c,x)
277#endif
278
279
280voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
281                        unsigned size));
282void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
283
284#define ZALLOC(strm, items, size) \
285           (*((strm)->zalloc))((strm)->opaque, (items), (size))
286#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
287#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
288
289#endif /* ZUTIL_H */
290