zutil.h revision 33908 
1/* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-1998 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 33908 1998-02-28 06:08:17Z steve $ */
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
34typedef unsigned char  uch;
35typedef uch FAR uchf;
36typedef unsigned short ush;
37typedef ush FAR ushf;
38typedef unsigned long  ulg;
39
40extern 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#  ifdef __TURBOC__
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#  ifndef fdopen
116#    define fdopen(fd,mode) NULL /* No fdopen() */
117#  endif
118#endif
119#if defined(__MWERKS__) && !defined(fdopen)
120#  if __dest_os != __be_os && __dest_os != __win32_os
121#    define fdopen(fd,mode) NULL
122#  endif
123#endif
124
125#ifdef __50SERIES /* Prime/PRIMOS */
126#  define OS_CODE  0x0F
127#endif
128
129#ifdef TOPS20
130#  define OS_CODE  0x0a
131#endif
132
133#if defined(_BEOS_) || defined(RISCOS)
134#  define fdopen(fd,mode) NULL /* No fdopen() */
135#endif
136
137#if (defined(_MSC_VER) && (_MSC_VER >= 600))
138#  define fdopen(fd,type)  _fdopen(fd,type)
139#endif
140
141
142        /* Common defaults */
143
144#ifndef OS_CODE
145#  define OS_CODE  0x03  /* assume Unix */
146#endif
147
148#ifndef F_OPEN
149#  define F_OPEN(name, mode) fopen((name), (mode))
150#endif
151
152         /* functions */
153
154#ifdef HAVE_STRERROR
155   extern char *strerror OF((int));
156#  define zstrerror(errnum) strerror(errnum)
157#else
158#  define zstrerror(errnum) ""
159#endif
160
161#if defined(pyr)
162#  define NO_MEMCPY
163#endif
164#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
165 /* Use our own functions for small and medium model with MSC <= 5.0.
166  * You may have to use the same strategy for Borland C (untested).
167  * The __SC__ check is for Symantec.
168  */
169#  define NO_MEMCPY
170#endif
171#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
172#  define HAVE_MEMCPY
173#endif
174#ifdef HAVE_MEMCPY
175#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
176#    define zmemcpy _fmemcpy
177#    define zmemcmp _fmemcmp
178#    define zmemzero(dest, len) _fmemset(dest, 0, len)
179#  else
180#    define zmemcpy memcpy
181#    define zmemcmp memcmp
182#    define zmemzero(dest, len) memset(dest, 0, len)
183#  endif
184#else
185   extern void zmemcpy  OF((Bytef* dest, Bytef* source, uInt len));
186   extern int  zmemcmp  OF((Bytef* s1,   Bytef* s2, uInt len));
187   extern void zmemzero OF((Bytef* dest, uInt len));
188#endif
189
190/* Diagnostic functions */
191#ifdef DEBUG
192#  include <stdio.h>
193   extern int z_verbose;
194   extern void z_error    OF((char *m));
195#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
196#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
197#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
198#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
199#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
200#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
201#else
202#  define Assert(cond,msg)
203#  define Trace(x)
204#  define Tracev(x)
205#  define Tracevv(x)
206#  define Tracec(c,x)
207#  define Tracecv(c,x)
208#endif
209
210
211typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
212				       uInt len));
213voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
214void   zcfree  OF((voidpf opaque, voidpf ptr));
215
216#define ZALLOC(strm, items, size) \
217           (*((strm)->zalloc))((strm)->opaque, (items), (size))
218#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
219#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
220
221#endif /* _Z_UTIL_H */
222