1 /* zutil.h -- internal interface and configuration of the compression library
2  * Copyright (C) 1995-2013 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 1.1.1.2 2002/03/11 21:53:28 tromey Exp $ */
12 
13 #ifndef ZUTIL_H
14 #define ZUTIL_H
15 
16 #ifdef HAVE_HIDDEN
17 #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
18 #else
19 #  define ZLIB_INTERNAL
20 #endif
21 
22 #include "zlib.h"
23 
24 #if defined(STDC) && !defined(Z_SOLO)
25 #  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
26 #    include <stddef.h>
27 #  endif
28 #  include <string.h>
29 #  include <stdlib.h>
30 #endif
31 
32 #ifdef Z_SOLO
33    typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
34 #endif
35 
36 #ifndef local
37 #  define local static
38 #endif
39 /* compile with -Dlocal if your debugger can't find static symbols */
40 
41 typedef unsigned char  uch;
42 typedef uch FAR uchf;
43 typedef unsigned short ush;
44 typedef ush FAR ushf;
45 typedef unsigned long  ulg;
46 
47 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
48 /* (size given to avoid silly warnings with Visual C++) */
49 
50 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
51 
52 #define ERR_RETURN(strm,err) \
53   return (strm->msg = ERR_MSG(err), (err))
54 /* To be used only when the state is known to be valid */
55 
56         /* common constants */
57 
58 #ifndef DEF_WBITS
59 #  define DEF_WBITS MAX_WBITS
60 #endif
61 /* default windowBits for decompression. MAX_WBITS is for compression only */
62 
63 #if MAX_MEM_LEVEL >= 8
64 #  define DEF_MEM_LEVEL 8
65 #else
66 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
67 #endif
68 /* default memLevel */
69 
70 #define STORED_BLOCK 0
71 #define STATIC_TREES 1
72 #define DYN_TREES    2
73 /* The three kinds of block type */
74 
75 #define MIN_MATCH  3
76 #define MAX_MATCH  258
77 /* The minimum and maximum match lengths */
78 
79 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
80 
81         /* target dependencies */
82 
83 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
84 #  define OS_CODE  0x00
85 #  ifndef Z_SOLO
86 #    if defined(__TURBOC__) || defined(__BORLANDC__)
87 #      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
88          /* Allow compilation with ANSI keywords only enabled */
89          void _Cdecl farfree( void *block );
90          void *_Cdecl farmalloc( unsigned long nbytes );
91 #      else
92 #        include <alloc.h>
93 #      endif
94 #    else /* MSC or DJGPP */
95 #      include <malloc.h>
96 #    endif
97 #  endif
98 #endif
99 
100 #ifdef AMIGA
101 #  define OS_CODE  0x01
102 #endif
103 
104 #if defined(VAXC) || defined(VMS)
105 #  define OS_CODE  0x02
106 #  define F_OPEN(name, mode) \
107      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
108 #endif
109 
110 #if defined(ATARI) || defined(atarist)
111 #  define OS_CODE  0x05
112 #endif
113 
114 #ifdef OS2
115 #  define OS_CODE  0x06
116 #  if defined(M_I86) && !defined(Z_SOLO)
117 #    include <malloc.h>
118 #  endif
119 #endif
120 
121 #if defined(MACOS) || defined(TARGET_OS_MAC)
122 #  define OS_CODE  0x07
123 #  ifndef Z_SOLO
124 #    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
125 #      include <unix.h> /* for fdopen */
126 #    else
127 #      ifndef fdopen
128 #        define fdopen(fd,mode) NULL /* No fdopen() */
129 #      endif
130 #    endif
131 #  endif
132 #endif
133 
134 #ifdef TOPS20
135 #  define OS_CODE  0x0a
136 #endif
137 
138 #ifdef WIN32
139 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
140 #    define OS_CODE  0x0b
141 #  endif
142 #endif
143 
144 #ifdef __50SERIES /* Prime/PRIMOS */
145 #  define OS_CODE  0x0f
146 #endif
147 
148 #if defined(_BEOS_) || defined(RISCOS)
149 #  define fdopen(fd,mode) NULL /* No fdopen() */
150 #endif
151 
152 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
153 #  if defined(_WIN32_WCE)
154 #    define fdopen(fd,mode) NULL /* No fdopen() */
155 #    ifndef _PTRDIFF_T_DEFINED
156        typedef int ptrdiff_t;
157 #      define _PTRDIFF_T_DEFINED
158 #    endif
159 #  else
160 #    define fdopen(fd,type)  _fdopen(fd,type)
161 #  endif
162 #endif
163 
164 #if defined(__BORLANDC__) && !defined(MSDOS)
165   #pragma warn -8004
166   #pragma warn -8008
167   #pragma warn -8066
168 #endif
169 
170 /* provide prototypes for these when building zlib without LFS */
171 #if !defined(_WIN32) && \
172     (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
173     ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
174     ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
175 #endif
176 
177         /* common defaults */
178 
179 #ifndef OS_CODE
180 #  define OS_CODE  0x03  /* assume Unix */
181 #endif
182 
183 #ifndef F_OPEN
184 #  define F_OPEN(name, mode) fopen((name), (mode))
185 #endif
186 
187          /* functions */
188 
189 #if defined(pyr) || defined(Z_SOLO)
190 #  define NO_MEMCPY
191 #endif
192 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
193  /* Use our own functions for small and medium model with MSC <= 5.0.
194   * You may have to use the same strategy for Borland C (untested).
195   * The __SC__ check is for Symantec.
196   */
197 #  define NO_MEMCPY
198 #endif
199 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
200 #  define HAVE_MEMCPY
201 #endif
202 #ifdef HAVE_MEMCPY
203 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
204 #    define zmemcpy _fmemcpy
205 #    define zmemcmp _fmemcmp
206 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
207 #  else
208 #    define zmemcpy memcpy
209 #    define zmemcmp memcmp
210 #    define zmemzero(dest, len) memset(dest, 0, len)
211 #  endif
212 #else
213    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
214    int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
215    void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
216 #endif
217 
218 /* Diagnostic functions */
219 #ifdef DEBUG
220 #  include <stdio.h>
221    extern int ZLIB_INTERNAL z_verbose;
222    extern void ZLIB_INTERNAL z_error OF((char *m));
223 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
224 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
225 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
226 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
227 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
228 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
229 #else
230 #  define Assert(cond,msg)
231 #  define Trace(x)
232 #  define Tracev(x)
233 #  define Tracevv(x)
234 #  define Tracec(c,x)
235 #  define Tracecv(c,x)
236 #endif
237 
238 #ifndef Z_SOLO
239    voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
240                                     unsigned size));
241    void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
242 #endif
243 
244 #define ZALLOC(strm, items, size) \
245            (*((strm)->zalloc))((strm)->opaque, (items), (size))
246 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
247 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
248 
249 /* Reverse the bytes in a 32-bit value */
250 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
251                     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
252 
253 #endif /* ZUTIL_H */
254