zutil.h revision 131380
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/* @(#) $FreeBSD: head/lib/libz/zutil.h 131380 2004-06-30 23:54:46Z tjr $ */
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
35typedef unsigned char  uch;
36typedef uch FAR uchf;
37typedef unsigned short ush;
38typedef ush FAR ushf;
39typedef unsigned long  ulg;
40
41extern 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
193#ifdef HAVE_STRERROR
194   extern char *strerror OF((int));
195#  define zstrerror(errnum) strerror(errnum)
196#else
197#  define zstrerror(errnum) ""
198#endif
199
200#if defined(pyr)
201#  define NO_MEMCPY
202#endif
203#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
204 /* Use our own functions for small and medium model with MSC <= 5.0.
205  * You may have to use the same strategy for Borland C (untested).
206  * The __SC__ check is for Symantec.
207  */
208#  define NO_MEMCPY
209#endif
210#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
211#  define HAVE_MEMCPY
212#endif
213#ifdef HAVE_MEMCPY
214#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
215#    define zmemcpy _fmemcpy
216#    define zmemcmp _fmemcmp
217#    define zmemzero(dest, len) _fmemset(dest, 0, len)
218#  else
219#    define zmemcpy memcpy
220#    define zmemcmp memcmp
221#    define zmemzero(dest, len) memset(dest, 0, len)
222#  endif
223#else
224   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
225   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
226   extern void zmemzero OF((Bytef* dest, uInt len));
227#endif
228
229/* Diagnostic functions */
230#ifdef DEBUG
231#  include <stdio.h>
232   extern int z_verbose;
233   extern void z_error    OF((char *m));
234#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
235#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
236#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
237#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
238#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
239#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
240#else
241#  define Assert(cond,msg)
242#  define Trace(x)
243#  define Tracev(x)
244#  define Tracevv(x)
245#  define Tracec(c,x)
246#  define Tracecv(c,x)
247#endif
248
249
250voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
251void   zcfree  OF((voidpf opaque, voidpf ptr));
252
253#define ZALLOC(strm, items, size) \
254           (*((strm)->zalloc))((strm)->opaque, (items), (size))
255#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
256#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
257
258#endif /* ZUTIL_H */
259