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c801d85f 1/* zutil.h -- internal interface and configuration of the compression library
41faf807 2 * Copyright (C) 1995-2005 Jean-loup Gailly.
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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
c801d85f 11
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12#ifndef ZUTIL_H
13#define ZUTIL_H
c801d85f 14
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15#define ZLIB_INTERNAL
16#include "zlib.h"
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17
18#ifdef STDC
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19# ifndef _WIN32_WCE
20# include <stddef.h>
21# endif
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22# include <string.h>
23# include <stdlib.h>
24#endif
25#ifdef NO_ERRNO_H
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26# ifdef _WIN32_WCE
27 /* The Microsoft C Run-Time Library for Windows CE doesn't have
28 * errno. We define it as a global variable to simplify porting.
29 * Its value is always 0 and should not be used. We rename it to
30 * avoid conflict with other libraries that use the same workaround.
31 */
32# define errno z_errno
33# endif
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34 extern int errno;
35#else
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36# ifndef _WIN32_WCE
37# include <errno.h>
38# endif
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39#endif
40
41#ifndef local
42# define local static
43#endif
3dd4e4e0 44/* compile with -Dlocal if your debugger can't find static symbols */
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45
46typedef unsigned char uch;
47typedef uch FAR uchf;
48typedef unsigned short ush;
49typedef ush FAR ushf;
50typedef unsigned long ulg;
51
51dbdf87 52extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
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53/* (size given to avoid silly warnings with Visual C++) */
54
55#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
56
57#define ERR_RETURN(strm,err) \
58 return (strm->msg = (char*)ERR_MSG(err), (err))
59/* To be used only when the state is known to be valid */
60
61 /* common constants */
62
63#ifndef DEF_WBITS
64# define DEF_WBITS MAX_WBITS
65#endif
66/* default windowBits for decompression. MAX_WBITS is for compression only */
67
68#if MAX_MEM_LEVEL >= 8
69# define DEF_MEM_LEVEL 8
70#else
71# define DEF_MEM_LEVEL MAX_MEM_LEVEL
72#endif
73/* default memLevel */
74
75#define STORED_BLOCK 0
76#define STATIC_TREES 1
77#define DYN_TREES 2
78/* The three kinds of block type */
79
80#define MIN_MATCH 3
81#define MAX_MATCH 258
82/* The minimum and maximum match lengths */
83
84#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
85
86 /* target dependencies */
87
51dbdf87 88#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
c801d85f 89# define OS_CODE 0x00
51dbdf87 90# if defined(__TURBOC__) || defined(__BORLANDC__)
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91# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
92 /* Allow compilation with ANSI keywords only enabled */
93 void _Cdecl farfree( void *block );
94 void *_Cdecl farmalloc( unsigned long nbytes );
95# else
51dbdf87 96# include <alloc.h>
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97# endif
98# else /* MSC or DJGPP */
99# include <malloc.h>
100# endif
101#endif
102
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103#ifdef AMIGA
104# define OS_CODE 0x01
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105#endif
106
107#if defined(VAXC) || defined(VMS)
108# define OS_CODE 0x02
109# define F_OPEN(name, mode) \
110 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
111#endif
112
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113#if defined(ATARI) || defined(atarist)
114# define OS_CODE 0x05
115#endif
116
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117#ifdef OS2
118# define OS_CODE 0x06
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119# ifdef M_I86
120 #include <malloc.h>
121# endif
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122#endif
123
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124#if defined(MACOS) || defined(TARGET_OS_MAC)
125# define OS_CODE 0x07
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126# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
127# include <unix.h> /* for fdopen */
128# else
129# ifndef fdopen
130# define fdopen(fd,mode) NULL /* No fdopen() */
131# endif
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132# endif
133#endif
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134
135#ifdef TOPS20
136# define OS_CODE 0x0a
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137#endif
138
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139#ifdef WIN32
140# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
141# define OS_CODE 0x0b
142# endif
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143#endif
144
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145#ifdef __50SERIES /* Prime/PRIMOS */
146# define OS_CODE 0x0f
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147#endif
148
149#if defined(_BEOS_) || defined(RISCOS)
150# define fdopen(fd,mode) NULL /* No fdopen() */
151#endif
152
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153#if (defined(_MSC_VER) && (_MSC_VER > 600))
154# if defined(_WIN32_WCE)
155# define fdopen(fd,mode) NULL /* No fdopen() */
156# ifndef _PTRDIFF_T_DEFINED
157 typedef int ptrdiff_t;
158# define _PTRDIFF_T_DEFINED
159# endif
160# else
161# define fdopen(fd,type) _fdopen(fd,type)
162# endif
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163#endif
164
51dbdf87 165 /* common defaults */
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166
167#ifndef OS_CODE
168# define OS_CODE 0x03 /* assume Unix */
169#endif
170
171#ifndef F_OPEN
172# define F_OPEN(name, mode) fopen((name), (mode))
173#endif
174
175 /* functions */
176
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177#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
178# ifndef HAVE_VSNPRINTF
179# define HAVE_VSNPRINTF
180# endif
181#endif
182#if defined(__CYGWIN__)
183# ifndef HAVE_VSNPRINTF
184# define HAVE_VSNPRINTF
185# endif
186#endif
187#ifndef HAVE_VSNPRINTF
188# ifdef MSDOS
189 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
190 but for now we just assume it doesn't. */
191# define NO_vsnprintf
192# endif
193# ifdef __TURBOC__
194# define NO_vsnprintf
195# endif
196# ifdef WIN32
197 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
198# if !defined(vsnprintf) && !defined(NO_vsnprintf)
199# define vsnprintf _vsnprintf
200# endif
201# endif
202# ifdef __SASC
203# define NO_vsnprintf
204# endif
205#endif
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206#ifdef VMS
207# define NO_vsnprintf
208#endif
51dbdf87 209
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210#if defined(pyr)
211# define NO_MEMCPY
212#endif
213#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
214 /* Use our own functions for small and medium model with MSC <= 5.0.
215 * You may have to use the same strategy for Borland C (untested).
216 * The __SC__ check is for Symantec.
217 */
218# define NO_MEMCPY
219#endif
220#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
221# define HAVE_MEMCPY
222#endif
223#ifdef HAVE_MEMCPY
224# ifdef SMALL_MEDIUM /* MSDOS small or medium model */
225# define zmemcpy _fmemcpy
226# define zmemcmp _fmemcmp
227# define zmemzero(dest, len) _fmemset(dest, 0, len)
228# else
229# define zmemcpy memcpy
230# define zmemcmp memcmp
231# define zmemzero(dest, len) memset(dest, 0, len)
232# endif
233#else
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234 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
235 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
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236 extern void zmemzero OF((Bytef* dest, uInt len));
237#endif
238
239/* Diagnostic functions */
51dbdf87 240#ifdef DEBUG
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241# include <stdio.h>
242 extern int z_verbose;
243 extern void z_error OF((char *m));
244# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
245# define Trace(x) {if (z_verbose>=0) fprintf x ;}
246# define Tracev(x) {if (z_verbose>0) fprintf x ;}
247# define Tracevv(x) {if (z_verbose>1) fprintf x ;}
248# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
249# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
250#else
251# define Assert(cond,msg)
252# define Trace(x)
253# define Tracev(x)
254# define Tracevv(x)
255# define Tracec(c,x)
256# define Tracecv(c,x)
257#endif
258
259
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260voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
261void zcfree OF((voidpf opaque, voidpf ptr));
262
263#define ZALLOC(strm, items, size) \
264 (*((strm)->zalloc))((strm)->opaque, (items), (size))
265#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
266#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
267
51dbdf87 268#endif /* ZUTIL_H */