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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 */