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zutil.h
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1 /* zutil.h -- internal interface and configuration of the compression library
2  * Copyright (C) 1995-2003 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 1.1 2005-05-12 21:04:53 duns Exp $ */
12 
13 #ifndef _ZUTIL_H
14 #define _ZUTIL_H
15 
16 #define ZLIB_INTERNAL
17 #include "zlib.h"
18 
19 #ifdef STDC
20 # include <stddef.h>
21 # include <string.h>
22 # include <stdlib.h>
23 #endif
24 #ifdef NO_ERRNO_H
25  extern int errno;
26 #else
27 # include <errno.h>
28 #endif
29 
30 #ifndef local
31 # define local static
32 #endif
33 /* compile with -Dlocal if your debugger can't find static symbols */
34 
35 typedef unsigned char uch;
36 typedef uch FAR uchf;
37 typedef unsigned short ush;
38 typedef ush FAR ushf;
39 typedef unsigned long ulg;
40 
41 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
42 /* (size given to avoid silly warnings with Visual C++) */
43 
44 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
45 
46 #define ERR_RETURN(strm,err) \
47  return (strm->msg = (char*)ERR_MSG(err), (err))
48 /* To be used only when the state is known to be valid */
49 
50  /* common constants */
51 
52 #ifndef DEF_WBITS
53 # define DEF_WBITS MAX_WBITS
54 #endif
55 /* default windowBits for decompression. MAX_WBITS is for compression only */
56 
57 #if MAX_MEM_LEVEL >= 8
58 # define DEF_MEM_LEVEL 8
59 #else
60 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
61 #endif
62 /* default memLevel */
63 
64 #define STORED_BLOCK 0
65 #define STATIC_TREES 1
66 #define DYN_TREES 2
67 /* The three kinds of block type */
68 
69 #define MIN_MATCH 3
70 #define MAX_MATCH 258
71 /* The minimum and maximum match lengths */
72 
73 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
74 
75  /* target dependencies */
76 
77 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
78 # define OS_CODE 0x00
79 # if defined(__TURBOC__) || defined(__BORLANDC__)
80 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
81  /* Allow compilation with ANSI keywords only enabled */
82  void _Cdecl farfree( void *block );
83  void *_Cdecl farmalloc( unsigned long nbytes );
84 # else
85 # include <alloc.h>
86 # endif
87 # else /* MSC or DJGPP */
88 # include <malloc.h>
89 # endif
90 #endif
91 
92 #ifdef AMIGA
93 # define OS_CODE 0x01
94 #endif
95 
96 #if defined(VAXC) || defined(VMS)
97 # define OS_CODE 0x02
98 # define F_OPEN(name, mode) \
99  fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
100 #endif
101 
102 #if defined(ATARI) || defined(atarist)
103 # define OS_CODE 0x05
104 #endif
105 
106 #ifdef OS2
107 # define OS_CODE 0x06
108 #endif
109 
110 #if defined(MACOS) || defined(TARGET_OS_MAC)
111 # define OS_CODE 0x07
112 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
113 # include <unix.h> /* for fdopen */
114 # else
115 # ifndef fdopen
116 # define fdopen(fd,mode) NULL /* No fdopen() */
117 # endif
118 # endif
119 #endif
120 
121 #ifdef TOPS20
122 # define OS_CODE 0x0a
123 #endif
124 
125 #ifdef WIN32
126 # ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
127 # define OS_CODE 0x0b
128 # endif
129 #endif
130 
131 #ifdef __50SERIES /* Prime/PRIMOS */
132 # define OS_CODE 0x0f
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 # if defined(_WIN32_WCE)
141 # define fdopen(fd,mode) NULL /* No fdopen() */
142 # ifndef _PTRDIFF_T_DEFINED
143  typedef int ptrdiff_t;
144 # define _PTRDIFF_T_DEFINED
145 # endif
146 # else
147 # define fdopen(fd,type) _fdopen(fd,type)
148 # endif
149 #endif
150 
151  /* common defaults */
152 
153 #ifndef OS_CODE
154 # define OS_CODE 0x03 /* assume Unix */
155 #endif
156 
157 #ifndef F_OPEN
158 # define F_OPEN(name, mode) fopen((name), (mode))
159 #endif
160 
161  /* functions */
162 
163 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
164 # ifndef HAVE_VSNPRINTF
165 # define HAVE_VSNPRINTF
166 # endif
167 #endif
168 #if defined(__CYGWIN__)
169 # ifndef HAVE_VSNPRINTF
170 # define HAVE_VSNPRINTF
171 # endif
172 #endif
173 #ifndef HAVE_VSNPRINTF
174 # ifdef MSDOS
175  /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
176  but for now we just assume it doesn't. */
177 # define NO_vsnprintf
178 # endif
179 # ifdef __TURBOC__
180 # define NO_vsnprintf
181 # endif
182 # ifdef WIN32
183  /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
184 # if !defined(vsnprintf) && !defined(NO_vsnprintf)
185 # define vsnprintf _vsnprintf
186 # endif
187 # endif
188 # ifdef __SASC
189 # define NO_vsnprintf
190 # endif
191 #endif
192 #ifdef VMS
193 # define NO_vsnprintf
194 #endif
195 
196 #ifdef HAVE_STRERROR
197 # ifndef VMS
198  extern char *strerror OF((int));
199 # endif
200 # define zstrerror(errnum) strerror(errnum)
201 #else
202 # define zstrerror(errnum) ""
203 #endif
204 
205 #if defined(pyr)
206 # define NO_MEMCPY
207 #endif
208 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
209  /* Use our own functions for small and medium model with MSC <= 5.0.
210  * You may have to use the same strategy for Borland C (untested).
211  * The __SC__ check is for Symantec.
212  */
213 # define NO_MEMCPY
214 #endif
215 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
216 # define HAVE_MEMCPY
217 #endif
218 #ifdef HAVE_MEMCPY
219 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
220 # define zmemcpy _fmemcpy
221 # define zmemcmp _fmemcmp
222 # define zmemzero(dest, len) _fmemset(dest, 0, len)
223 # else
224 # define zmemcpy memcpy
225 # define zmemcmp memcmp
226 # define zmemzero(dest, len) memset(dest, 0, len)
227 # endif
228 #else
229  extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
230  extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
231  extern void zmemzero OF((Bytef* dest, uInt len));
232 #endif
233 
234 /* Diagnostic functions */
235 #ifdef DEBUG
236 # include <stdio.h>
237  extern int z_verbose;
238  extern void z_error OF((char *m));
239 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
240 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
241 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
242 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
243 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
244 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
245 #else
246 # define Assert(cond,msg)
247 # define Trace(x)
248 # define Tracev(x)
249 # define Tracevv(x)
250 # define Tracec(c,x)
251 # define Tracecv(c,x)
252 #endif
253 
254 
255 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
256 void zcfree OF((voidpf opaque, voidpf ptr));
257 
258 #define ZALLOC(strm, items, size) \
259  (*((strm)->zalloc))((strm)->opaque, (items), (size))
260 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
261 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
262 
263 #endif /* _ZUTIL_H */
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