zutil.h revision 21673 
1/* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-1996 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 21673 1997-01-14 07:20:47Z jkh $ */
12
13#ifndef _Z_UTIL_H
14#define _Z_UTIL_H
15
16#include "zlib.h"
17
18#if defined(MSDOS)||defined(VMS)||defined(CRAY)||defined(WIN32)||defined(RISCOS)
19#   include <stddef.h>
20#   include <errno.h>
21#else
22    extern int errno;
23#endif
24#ifdef STDC
25#  include <string.h>
26#  include <stdlib.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#    include <alloc.h>
80#  else /* MSC or DJGPP */
81#    include <malloc.h>
82#  endif
83#endif
84
85#ifdef OS2
86#  define OS_CODE  0x06
87#endif
88
89#ifdef WIN32 /* Window 95 & Windows NT */
90#  define OS_CODE  0x0b
91#endif
92
93#if defined(VAXC) || defined(VMS)
94#  define OS_CODE  0x02
95#  define FOPEN(name, mode) \
96     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
97#endif
98
99#ifdef AMIGA
100#  define OS_CODE  0x01
101#endif
102
103#if defined(ATARI) || defined(atarist)
104#  define OS_CODE  0x05
105#endif
106
107#ifdef MACOS
108#  define OS_CODE  0x07
109#endif
110
111#ifdef __50SERIES /* Prime/PRIMOS */
112#  define OS_CODE  0x0F
113#endif
114
115#ifdef TOPS20
116#  define OS_CODE  0x0a
117#endif
118
119#if defined(_BEOS_) || defined(RISCOS)
120#  define fdopen(fd,mode) NULL /* No fdopen() */
121#endif
122
123        /* Common defaults */
124
125#ifndef OS_CODE
126#  define OS_CODE  0x03  /* assume Unix */
127#endif
128
129#ifndef FOPEN
130#  define FOPEN(name, mode) fopen((name), (mode))
131#endif
132
133         /* functions */
134
135#ifdef HAVE_STRERROR
136   extern char *strerror OF((int));
137#  define zstrerror(errnum) strerror(errnum)
138#else
139#  define zstrerror(errnum) ""
140#endif
141
142#if defined(pyr)
143#  define NO_MEMCPY
144#endif
145#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(_MSC_VER)
146 /* Use our own functions for small and medium model with MSC <= 5.0.
147  * You may have to use the same strategy for Borland C (untested).
148  */
149#  define NO_MEMCPY
150#endif
151#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
152#  define HAVE_MEMCPY
153#endif
154#ifdef HAVE_MEMCPY
155#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
156#    define zmemcpy _fmemcpy
157#    define zmemcmp _fmemcmp
158#    define zmemzero(dest, len) _fmemset(dest, 0, len)
159#  else
160#    define zmemcpy memcpy
161#    define zmemcmp memcmp
162#    define zmemzero(dest, len) memset(dest, 0, len)
163#  endif
164#else
165   extern void zmemcpy  OF((Bytef* dest, Bytef* source, uInt len));
166   extern int  zmemcmp  OF((Bytef* s1,   Bytef* s2, uInt len));
167   extern void zmemzero OF((Bytef* dest, uInt len));
168#endif
169
170/* Diagnostic functions */
171#ifdef DEBUG
172#  include <stdio.h>
173#  ifndef verbose
174#    define verbose 0
175#  endif
176   extern void z_error    OF((char *m));
177#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
178#  define Trace(x) fprintf x
179#  define Tracev(x) {if (verbose) fprintf x ;}
180#  define Tracevv(x) {if (verbose>1) fprintf x ;}
181#  define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
182#  define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
183#else
184#  define Assert(cond,msg)
185#  define Trace(x)
186#  define Tracev(x)
187#  define Tracevv(x)
188#  define Tracec(c,x)
189#  define Tracecv(c,x)
190#endif
191
192
193typedef uLong (*check_func) OF((uLong check, const Bytef *buf, uInt len));
194
195voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
196void   zcfree  OF((voidpf opaque, voidpf ptr));
197
198#define ZALLOC(strm, items, size) \
199           (*((strm)->zalloc))((strm)->opaque, (items), (size))
200#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
201#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
202
203#endif /* _Z_UTIL_H */
204