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
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.
11 /* $Id: zutil.h,v 1.13 1996/01/30 21:59:29 me Exp $ */
18 #if defined(MSDOS) || defined(VMS) || defined(CRAY) || defined(WIN32)
32 /* compile with -Dlocal if your debugger can't find static symbols */
34 typedef unsigned char uch;
36 typedef unsigned short ush;
38 typedef unsigned long ulg;
40 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
41 /* (size given to avoid silly warnings with Visual C++) */
43 #define ERR_MSG(err) (char*)z_errmsg[Z_NEED_DICT-(err)]
45 #define ERR_RETURN(strm,err) \
46 return (strm->msg = ERR_MSG(err), (err))
47 /* To be used only when the state is known to be valid */
49 /* common constants */
52 # define DEF_WBITS MAX_WBITS
54 /* default windowBits for decompression. MAX_WBITS is for compression only */
56 #if MAX_MEM_LEVEL >= 8
57 # define DEF_MEM_LEVEL 8
59 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
61 /* default memLevel */
63 #define STORED_BLOCK 0
64 #define STATIC_TREES 1
66 /* The three kinds of block type */
70 /* The minimum and maximum match lengths */
72 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
74 /* target dependencies */
80 # else /* MSC or DJGPP */
89 #ifdef WIN32 /* Window 95 & Windows NT */
93 #if defined(VAXC) || defined(VMS)
95 # define FOPEN(name, mode) \
96 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
100 # define OS_CODE 0x01
103 #if defined(ATARI) || defined(atarist)
104 # define OS_CODE 0x05
108 # define OS_CODE 0x07
111 #ifdef __50SERIES /* Prime/PRIMOS */
112 # define OS_CODE 0x0F
116 # define OS_CODE 0x0a
120 # define fdopen(fd,mode) NULL /* No fdopen() */
123 /* Common defaults */
126 # define OS_CODE 0x03 /* assume Unix */
130 # define FOPEN(name, mode) fopen((name), (mode))
136 extern char *strerror OF((int));
137 # define zstrerror(errnum) strerror(errnum)
139 # define zstrerror(errnum) ""
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).
151 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_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)
160 # define zmemcpy memcpy
161 # define zmemcmp memcmp
162 # define zmemzero(dest, len) memset(dest, 0, len)
165 extern void zmemcpy OF((Bytef* dest, Bytef* source, uInt len));
166 extern void zmemzero OF((Bytef* dest, uInt len));
169 /* Diagnostic functions */
175 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
176 # define Trace(x) fprintf x
177 # define Tracev(x) {if (verbose) fprintf x ;}
178 # define Tracevv(x) {if (verbose>1) fprintf x ;}
179 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
180 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
182 # define Assert(cond,msg)
187 # define Tracecv(c,x)
191 typedef uLong (*check_func) OF((uLong check, const Bytef *buf, uInt len));
193 extern void z_error OF((char *m));
195 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
196 void zcfree OF((voidpf opaque, voidpf ptr));
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);}
203 #endif /* _Z_UTIL_H */