c62d2810 |
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 | /* @(#) $Id: zutil.h,v 1.2 2002/03/13 17:45:56 xodnizel Exp $ */ |
12 | |
13 | #ifndef _Z_UTIL_H |
14 | #define _Z_UTIL_H |
15 | |
16 | #include "zlib.h" |
17 | |
18 | #ifdef STDC |
19 | # include <stddef.h> |
20 | # include <string.h> |
21 | # include <stdlib.h> |
22 | #endif |
23 | #ifdef NO_ERRNO_H |
24 | extern int errno; |
25 | #else |
26 | # include <errno.h> |
27 | #endif |
28 | |
29 | #ifndef local |
30 | # define local static |
31 | #endif |
32 | /* compile with -Dlocal if your debugger can't find static symbols */ |
33 | |
34 | typedef unsigned char uch; |
35 | typedef uch FAR uchf; |
36 | typedef unsigned short ush; |
37 | typedef ush FAR ushf; |
38 | typedef unsigned long ulg; |
39 | |
40 | extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */ |
41 | /* (size given to avoid silly warnings with Visual C++) */ |
42 | |
43 | #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] |
44 | |
45 | #define ERR_RETURN(strm,err) \ |
46 | return (strm->msg = (char*)ERR_MSG(err), (err)) |
47 | /* To be used only when the state is known to be valid */ |
48 | |
49 | /* common constants */ |
50 | |
51 | #ifndef DEF_WBITS |
52 | # define DEF_WBITS MAX_WBITS |
53 | #endif |
54 | /* default windowBits for decompression. MAX_WBITS is for compression only */ |
55 | |
56 | #if MAX_MEM_LEVEL >= 8 |
57 | # define DEF_MEM_LEVEL 8 |
58 | #else |
59 | # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
60 | #endif |
61 | /* default memLevel */ |
62 | |
63 | #define STORED_BLOCK 0 |
64 | #define STATIC_TREES 1 |
65 | #define DYN_TREES 2 |
66 | /* The three kinds of block type */ |
67 | |
68 | #define MIN_MATCH 3 |
69 | #define MAX_MATCH 258 |
70 | /* The minimum and maximum match lengths */ |
71 | |
72 | #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ |
73 | |
74 | /* target dependencies */ |
75 | |
76 | #ifdef MSDOS |
77 | # define OS_CODE 0x00 |
78 | # if defined(__TURBOC__) || defined(__BORLANDC__) |
79 | # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) |
80 | /* Allow compilation with ANSI keywords only enabled */ |
81 | void _Cdecl farfree( void *block ); |
82 | void *_Cdecl farmalloc( unsigned long nbytes ); |
83 | # else |
84 | # include <alloc.h> |
85 | # endif |
86 | # else /* MSC or DJGPP */ |
87 | # include <malloc.h> |
88 | # endif |
89 | #endif |
90 | |
91 | #ifdef OS2 |
92 | # define OS_CODE 0x06 |
93 | #endif |
94 | |
95 | #ifdef WIN32 /* Window 95 & Windows NT */ |
96 | # define OS_CODE 0x0b |
97 | #endif |
98 | |
99 | #if defined(VAXC) || defined(VMS) |
100 | # define OS_CODE 0x02 |
101 | # define F_OPEN(name, mode) \ |
102 | fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") |
103 | #endif |
104 | |
105 | #ifdef AMIGA |
106 | # define OS_CODE 0x01 |
107 | #endif |
108 | |
109 | #if defined(ATARI) || defined(atarist) |
110 | # define OS_CODE 0x05 |
111 | #endif |
112 | |
113 | #if defined(MACOS) || defined(TARGET_OS_MAC) |
114 | # define OS_CODE 0x07 |
115 | # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os |
116 | # include <unix.h> /* for fdopen */ |
117 | # else |
118 | # ifndef fdopen |
119 | # define fdopen(fd,mode) NULL /* No fdopen() */ |
120 | # endif |
121 | # endif |
122 | #endif |
123 | |
124 | #ifdef __50SERIES /* Prime/PRIMOS */ |
125 | # define OS_CODE 0x0F |
126 | #endif |
127 | |
128 | #ifdef TOPS20 |
129 | # define OS_CODE 0x0a |
130 | #endif |
131 | |
132 | #if defined(_BEOS_) || defined(RISCOS) |
133 | # define fdopen(fd,mode) NULL /* No fdopen() */ |
134 | #endif |
135 | |
136 | #if (defined(_MSC_VER) && (_MSC_VER > 600)) |
137 | # define fdopen(fd,type) _fdopen(fd,type) |
138 | #endif |
139 | |
140 | |
141 | /* Common defaults */ |
142 | |
143 | #ifndef OS_CODE |
144 | # define OS_CODE 0x03 /* assume Unix */ |
145 | #endif |
146 | |
147 | #ifndef F_OPEN |
148 | # define F_OPEN(name, mode) fopen((name), (mode)) |
149 | #endif |
150 | |
151 | /* functions */ |
152 | |
153 | #ifdef HAVE_STRERROR |
154 | extern char *strerror OF((int)); |
155 | # define zstrerror(errnum) strerror(errnum) |
156 | #else |
157 | # define zstrerror(errnum) "" |
158 | #endif |
159 | |
160 | #if defined(pyr) |
161 | # define NO_MEMCPY |
162 | #endif |
163 | #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) |
164 | /* Use our own functions for small and medium model with MSC <= 5.0. |
165 | * You may have to use the same strategy for Borland C (untested). |
166 | * The __SC__ check is for Symantec. |
167 | */ |
168 | # define NO_MEMCPY |
169 | #endif |
170 | #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) |
171 | # define HAVE_MEMCPY |
172 | #endif |
173 | #ifdef HAVE_MEMCPY |
174 | # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ |
175 | # define zmemcpy _fmemcpy |
176 | # define zmemcmp _fmemcmp |
177 | # define zmemzero(dest, len) _fmemset(dest, 0, len) |
178 | # else |
179 | # define zmemcpy memcpy |
180 | # define zmemcmp memcmp |
181 | # define zmemzero(dest, len) memset(dest, 0, len) |
182 | # endif |
183 | #else |
184 | extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); |
185 | extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); |
186 | extern void zmemzero OF((Bytef* dest, uInt len)); |
187 | #endif |
188 | |
189 | /* Diagnostic functions */ |
190 | #ifdef DEBUG |
191 | # include <stdio.h> |
192 | extern int z_verbose; |
193 | extern void z_error OF((char *m)); |
194 | # define Assert(cond,msg) {if(!(cond)) z_error(msg);} |
195 | # define Trace(x) {if (z_verbose>=0) fprintf x ;} |
196 | # define Tracev(x) {if (z_verbose>0) fprintf x ;} |
197 | # define Tracevv(x) {if (z_verbose>1) fprintf x ;} |
198 | # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} |
199 | # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} |
200 | #else |
201 | # define Assert(cond,msg) |
202 | # define Trace(x) |
203 | # define Tracev(x) |
204 | # define Tracevv(x) |
205 | # define Tracec(c,x) |
206 | # define Tracecv(c,x) |
207 | #endif |
208 | |
209 | |
210 | typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf, |
211 | uInt len)); |
212 | voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); |
213 | void zcfree OF((voidpf opaque, voidpf ptr)); |
214 | |
215 | #define ZALLOC(strm, items, size) \ |
216 | (*((strm)->zalloc))((strm)->opaque, (items), (size)) |
217 | #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) |
218 | #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} |
219 | |
220 | #endif /* _Z_UTIL_H */ |