1/* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-2002 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
12/* $Id: zutil.h 14574 2005-10-29 16:27:43Z bonefish $ */
13
14/* @(#) $Id: zutil.h 14574 2005-10-29 16:27:43Z bonefish $ */
15
16#ifndef _Z_UTIL_H
17#define _Z_UTIL_H
18
19#include "zlib.h"
20
21#ifdef STDC
22#  include <stddef.h>
23#  include <string.h>
24#  include <stdlib.h>
25#endif
26#ifdef NO_ERRNO_H
27    extern int errno;
28#else
29#   include <errno.h>
30#endif
31
32#ifndef local
33#  define local static
34#endif
35/* compile with -Dlocal if your debugger can't find static symbols */
36
37typedef unsigned char  uch;
38typedef uch FAR uchf;
39typedef unsigned short ush;
40typedef ush FAR ushf;
41typedef unsigned long  ulg;
42
43extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
44/* (size given to avoid silly warnings with Visual C++) */
45
46#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
47
48#define ERR_RETURN(strm,err) \
49  return (strm->msg = (char*)ERR_MSG(err), (err))
50/* To be used only when the state is known to be valid */
51
52        /* common constants */
53
54#ifndef DEF_WBITS
55#  define DEF_WBITS MAX_WBITS
56#endif
57/* default windowBits for decompression. MAX_WBITS is for compression only */
58
59#if MAX_MEM_LEVEL >= 8
60#  define DEF_MEM_LEVEL 8
61#else
62#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
63#endif
64/* default memLevel */
65
66#define STORED_BLOCK 0
67#define STATIC_TREES 1
68#define DYN_TREES    2
69/* The three kinds of block type */
70
71#define MIN_MATCH  3
72#define MAX_MATCH  258
73/* The minimum and maximum match lengths */
74
75#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
76
77        /* target dependencies */
78
79#ifdef MSDOS
80#  define OS_CODE  0x00
81#  if defined(__TURBOC__) || defined(__BORLANDC__)
82#    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
83       /* Allow compilation with ANSI keywords only enabled */
84       void _Cdecl farfree( void *block );
85       void *_Cdecl farmalloc( unsigned long nbytes );
86#    else
87#     include <alloc.h>
88#    endif
89#  else /* MSC or DJGPP */
90#    include <malloc.h>
91#  endif
92#endif
93
94#ifdef OS2
95#  define OS_CODE  0x06
96#endif
97
98#ifdef WIN32 /* Window 95 & Windows NT */
99#  define OS_CODE  0x0b
100#endif
101
102#if defined(VAXC) || defined(VMS)
103#  define OS_CODE  0x02
104#  define F_OPEN(name, mode) \
105     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
106#endif
107
108#ifdef AMIGA
109#  define OS_CODE  0x01
110#endif
111
112#if defined(ATARI) || defined(atarist)
113#  define OS_CODE  0x05
114#endif
115
116#if defined(MAC) || defined(TARGET_OS_MAC)
117#  define OS_CODE  0x07
118#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
119#    include <unix.h> /* for fdopen */
120#  else
121#    ifndef fdopen
122#      define fdopen(fd,mode) NULL /* No fdopen() */
123#    endif
124#  endif
125#endif
126
127#ifdef __50SERIES /* Prime/PRIMOS */
128#  define OS_CODE  0x0F
129#endif
130
131#ifdef TOPS20
132#  define OS_CODE  0x0a
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))
140#  define fdopen(fd,type)  _fdopen(fd,type)
141#endif
142
143
144        /* Common defaults */
145
146#ifndef OS_CODE
147#  define OS_CODE  0x03  /* assume Unix */
148#endif
149
150#ifndef F_OPEN
151#  define F_OPEN(name, mode) fopen((name), (mode))
152#endif
153
154         /* functions */
155
156#ifdef HAVE_STRERROR
157   extern char *strerror OF((int));
158#  define zstrerror(errnum) strerror(errnum)
159#else
160#  define zstrerror(errnum) ""
161#endif
162
163#if defined(pyr)
164#  define NO_MEMCPY
165#endif
166#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
167 /* Use our own functions for small and medium model with MSC <= 5.0.
168  * You may have to use the same strategy for Borland C (untested).
169  * The __SC__ check is for Symantec.
170  */
171#  define NO_MEMCPY
172#endif
173#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
174#  define HAVE_MEMCPY
175#endif
176#ifdef HAVE_MEMCPY
177#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
178#    define zmemcpy _fmemcpy
179#    define zmemcmp _fmemcmp
180#    define zmemzero(dest, len) _fmemset(dest, 0, len)
181#  else
182#    define zmemcpy memcpy
183#    define zmemcmp memcmp
184#    define zmemzero(dest, len) memset(dest, 0, len)
185#  endif
186#else
187   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
188   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
189   extern void zmemzero OF((Bytef* dest, uInt len));
190#endif
191
192/* Diagnostic functions */
193#ifdef DEBUG
194#  include <stdio.h>
195   extern int z_verbose;
196   extern void z_error    OF((char *m));
197#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
198#else
199#  define Assert(cond,msg)
200#endif
201
202/* PDFlib GmbH: we don't like trace messages from here. */
203#if 0
204#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
205#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
206#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
207#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
208#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
209#else
210#  define Trace(x)
211#  define Tracev(x)
212#  define Tracevv(x)
213#  define Tracec(c,x)
214#  define Tracecv(c,x)
215#endif
216
217
218typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
219				       uInt len));
220voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
221void   zcfree  OF((voidpf opaque, voidpf ptr));
222
223#define ZALLOC(strm, items, size) \
224           (*((strm)->zalloc))((strm)->opaque, (items), (size))
225#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
226#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
227
228#endif /* _Z_UTIL_H */
229