1 /* zutil.h -- internal interface and configuration of the compression library
2 * Copyright (C) 1995-2005 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.
28 /* The Microsoft C Run-Time Library for Windows CE doesn't have
29 * errno. We define it as a global variable to simplify porting.
30 * Its value is always 0 and should not be used. We rename it to
31 * avoid conflict with other libraries that use the same workaround.
33 # define errno z_errno
45 /* compile with -Dlocal if your debugger can't find static symbols */
47 typedef unsigned char uch;
49 typedef unsigned short ush;
51 typedef unsigned long ulg;
53 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
54 /* (size given to avoid silly warnings with Visual C++) */
56 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
58 #define ERR_RETURN(strm,err) \
59 return (strm->msg = (char*)ERR_MSG(err), (err))
60 /* To be used only when the state is known to be valid */
62 /* common constants */
65 # define DEF_WBITS MAX_WBITS
67 /* default windowBits for decompression. MAX_WBITS is for compression only */
69 #if MAX_MEM_LEVEL >= 8
70 # define DEF_MEM_LEVEL 8
72 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
74 /* default memLevel */
76 #define STORED_BLOCK 0
77 #define STATIC_TREES 1
79 /* The three kinds of block type */
83 /* The minimum and maximum match lengths */
85 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
87 /* target dependencies */
89 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
91 # if defined(__TURBOC__) || defined(__BORLANDC__)
92 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
93 /* Allow compilation with ANSI keywords only enabled */
94 void _Cdecl farfree( void *block );
95 void *_Cdecl farmalloc( unsigned long nbytes );
99 # else /* MSC or DJGPP */
105 # define OS_CODE 0x01
108 #if defined(VAXC) || defined(VMS)
109 # define OS_CODE 0x02
110 # define F_OPEN(name, mode) \
111 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
114 #if defined(ATARI) || defined(atarist)
115 # define OS_CODE 0x05
119 # define OS_CODE 0x06
122 #if defined(MACOS) || defined(TARGET_OS_MAC)
123 # define OS_CODE 0x07
124 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
125 # include <unix.h> /* for fdopen */
128 # define fdopen(fd,mode) NULL /* No fdopen() */
134 # define OS_CODE 0x0a
138 # ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
139 # define OS_CODE 0x0b
143 #ifdef __50SERIES /* Prime/PRIMOS */
144 # define OS_CODE 0x0f
147 #if defined(_BEOS_) || defined(RISCOS)
148 # define fdopen(fd,mode) NULL /* No fdopen() */
151 #if (defined(_MSC_VER) && (_MSC_VER > 600))
152 # if defined(_WIN32_WCE)
153 # define fdopen(fd,mode) NULL /* No fdopen() */
154 # ifndef _PTRDIFF_T_DEFINED
155 typedef int ptrdiff_t;
156 # define _PTRDIFF_T_DEFINED
159 # define fdopen(fd,type) _fdopen(fd,type)
163 /* common defaults */
166 # define OS_CODE 0x03 /* assume Unix */
170 # define F_OPEN(name, mode) fopen((name), (mode))
175 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
176 # ifndef HAVE_VSNPRINTF
177 # define HAVE_VSNPRINTF
180 #if defined(__CYGWIN__)
181 # ifndef HAVE_VSNPRINTF
182 # define HAVE_VSNPRINTF
185 #ifndef HAVE_VSNPRINTF
187 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
188 but for now we just assume it doesn't. */
189 # define NO_vsnprintf
192 # define NO_vsnprintf
195 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
196 # if !defined(vsnprintf) && !defined(NO_vsnprintf)
197 # define vsnprintf _vsnprintf
201 # define NO_vsnprintf
205 # define NO_vsnprintf
211 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
212 /* Use our own functions for small and medium model with MSC <= 5.0.
213 * You may have to use the same strategy for Borland C (untested).
214 * The __SC__ check is for Symantec.
218 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
222 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */
223 # define zmemcpy _fmemcpy
224 # define zmemcmp _fmemcmp
225 # define zmemzero(dest, len) _fmemset(dest, 0, len)
227 # define zmemcpy memcpy
228 # define zmemcmp memcmp
229 # define zmemzero(dest, len) memset(dest, 0, len)
232 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
233 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
234 extern void zmemzero OF((Bytef* dest, uInt len));
237 /* Diagnostic functions */
240 extern int z_verbose;
241 extern void z_error OF((char *m));
242 # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
243 # define Trace(x) {if (z_verbose>=0) fprintf x ;}
244 # define Tracev(x) {if (z_verbose>0) fprintf x ;}
245 # define Tracevv(x) {if (z_verbose>1) fprintf x ;}
246 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
247 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
249 # define Assert(cond,msg)
254 # define Tracecv(c,x)
258 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
259 void zcfree OF((voidpf opaque, voidpf ptr));
261 #define ZALLOC(strm, items, size) \
262 (*((strm)->zalloc))((strm)->opaque, (items), (size))
263 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
264 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}