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      1 /*
      2  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
      3  * Use is subject to license terms.
      4  */
      5 
      6 /* zutil.h -- internal interface and configuration of the compression library
      7  * Copyright (C) 1995-2005 Jean-loup Gailly.
      8  * For conditions of distribution and use, see copyright notice in zlib.h
      9  */
     10 
     11 /* WARNING: this file should *not* be used by applications. It is
     12    part of the implementation of the compression library and is
     13    subject to change. Applications should only use zlib.h.
     14  */
     15 
     16 #ifndef _ZUTIL_H
     17 #define _ZUTIL_H
     18 
     19 #pragma ident	"@(#)zutil.h	1.2	07/03/22 SMI"
     20 
     21 #define ZLIB_INTERNAL
     22 #include "zlib.h"
     23 
     24 #ifdef STDC
     25 #  ifndef _WIN32_WCE
     26 #    include <stddef.h>
     27 #  endif
     28 #  include <string.h>
     29 #  include <stdlib.h>
     30 #endif
     31 #ifdef NO_ERRNO_H
     32 #   ifdef _WIN32_WCE
     33       /* The Microsoft C Run-Time Library for Windows CE doesn't have
     34        * errno.  We define it as a global variable to simplify porting.
     35        * Its value is always 0 and should not be used.  We rename it to
     36        * avoid conflict with other libraries that use the same workaround.
     37        */
     38 #     define errno z_errno
     39 #   endif
     40     extern int errno;
     41 #else
     42 #  ifndef _WIN32_WCE
     43 #    include <sys/errno.h>
     44 #  endif
     45 #endif
     46 
     47 #ifndef local
     48 #  define local static
     49 #endif
     50 /* compile with -Dlocal if your debugger can't find static symbols */
     51 
     52 typedef unsigned char  uch;
     53 typedef uch FAR uchf;
     54 typedef unsigned short ush;
     55 typedef ush FAR ushf;
     56 typedef unsigned long  ulg;
     57 
     58 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
     59 /* (size given to avoid silly warnings with Visual C++) */
     60 
     61 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
     62 
     63 #define ERR_RETURN(strm,err) \
     64   return (strm->msg = (char*)ERR_MSG(err), (err))
     65 /* To be used only when the state is known to be valid */
     66 
     67         /* common constants */
     68 
     69 #ifndef DEF_WBITS
     70 #  define DEF_WBITS MAX_WBITS
     71 #endif
     72 /* default windowBits for decompression. MAX_WBITS is for compression only */
     73 
     74 #if MAX_MEM_LEVEL >= 8
     75 #  define DEF_MEM_LEVEL 8
     76 #else
     77 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
     78 #endif
     79 /* default memLevel */
     80 
     81 #define STORED_BLOCK 0
     82 #define STATIC_TREES 1
     83 #define DYN_TREES    2
     84 /* The three kinds of block type */
     85 
     86 #define MIN_MATCH  3
     87 #define MAX_MATCH  258
     88 /* The minimum and maximum match lengths */
     89 
     90 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
     91 
     92         /* target dependencies */
     93 
     94 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
     95 #  define OS_CODE  0x00
     96 #  if defined(__TURBOC__) || defined(__BORLANDC__)
     97 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
     98        /* Allow compilation with ANSI keywords only enabled */
     99        void _Cdecl farfree( void *block );
    100        void *_Cdecl farmalloc( unsigned long nbytes );
    101 #    else
    102 #      include <alloc.h>
    103 #    endif
    104 #  else /* MSC or DJGPP */
    105 #    include <malloc.h>
    106 #  endif
    107 #endif
    108 
    109 #ifdef AMIGA
    110 #  define OS_CODE  0x01
    111 #endif
    112 
    113 #if defined(VAXC) || defined(VMS)
    114 #  define OS_CODE  0x02
    115 #  define F_OPEN(name, mode) \
    116      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
    117 #endif
    118 
    119 #if defined(ATARI) || defined(atarist)
    120 #  define OS_CODE  0x05
    121 #endif
    122 
    123 #ifdef OS2
    124 #  define OS_CODE  0x06
    125 #  ifdef M_I86
    126      #include <malloc.h>
    127 #  endif
    128 #endif
    129 
    130 #if defined(MACOS) || defined(TARGET_OS_MAC)
    131 #  define OS_CODE  0x07
    132 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
    133 #    include <unix.h> /* for fdopen */
    134 #  else
    135 #    ifndef fdopen
    136 #      define fdopen(fd,mode) NULL /* No fdopen() */
    137 #    endif
    138 #  endif
    139 #endif
    140 
    141 #ifdef TOPS20
    142 #  define OS_CODE  0x0a
    143 #endif
    144 
    145 #ifdef WIN32
    146 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
    147 #    define OS_CODE  0x0b
    148 #  endif
    149 #endif
    150 
    151 #ifdef __50SERIES /* Prime/PRIMOS */
    152 #  define OS_CODE  0x0f
    153 #endif
    154 
    155 #if defined(_BEOS_) || defined(RISCOS)
    156 #  define fdopen(fd,mode) NULL /* No fdopen() */
    157 #endif
    158 
    159 #if (defined(_MSC_VER) && (_MSC_VER > 600))
    160 #  if defined(_WIN32_WCE)
    161 #    define fdopen(fd,mode) NULL /* No fdopen() */
    162 #    ifndef _PTRDIFF_T_DEFINED
    163        typedef int ptrdiff_t;
    164 #      define _PTRDIFF_T_DEFINED
    165 #    endif
    166 #  else
    167 #    define fdopen(fd,type)  _fdopen(fd,type)
    168 #  endif
    169 #endif
    170 
    171         /* common defaults */
    172 
    173 #ifndef OS_CODE
    174 #  define OS_CODE  0x03  /* assume Unix */
    175 #endif
    176 
    177 #ifndef F_OPEN
    178 #  define F_OPEN(name, mode) fopen((name), (mode))
    179 #endif
    180 
    181          /* functions */
    182 
    183 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
    184 #  ifndef HAVE_VSNPRINTF
    185 #    define HAVE_VSNPRINTF
    186 #  endif
    187 #endif
    188 #if defined(__CYGWIN__)
    189 #  ifndef HAVE_VSNPRINTF
    190 #    define HAVE_VSNPRINTF
    191 #  endif
    192 #endif
    193 #ifndef HAVE_VSNPRINTF
    194 #  ifdef MSDOS
    195      /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
    196         but for now we just assume it doesn't. */
    197 #    define NO_vsnprintf
    198 #  endif
    199 #  ifdef __TURBOC__
    200 #    define NO_vsnprintf
    201 #  endif
    202 #  ifdef WIN32
    203      /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
    204 #    if !defined(vsnprintf) && !defined(NO_vsnprintf)
    205 #      define vsnprintf _vsnprintf
    206 #    endif
    207 #  endif
    208 #  ifdef __SASC
    209 #    define NO_vsnprintf
    210 #  endif
    211 #endif
    212 #ifdef VMS
    213 #  define NO_vsnprintf
    214 #endif
    215 
    216 #if defined(pyr)
    217 #  define NO_MEMCPY
    218 #endif
    219 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
    220  /* Use our own functions for small and medium model with MSC <= 5.0.
    221   * You may have to use the same strategy for Borland C (untested).
    222   * The __SC__ check is for Symantec.
    223   */
    224 #  define NO_MEMCPY
    225 #endif
    226 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
    227 #  define HAVE_MEMCPY
    228 #endif
    229 #ifdef HAVE_MEMCPY
    230 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
    231 #    define zmemcpy _fmemcpy
    232 #    define zmemcmp _fmemcmp
    233 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
    234 #  else
    235 #    define zmemcpy memcpy
    236 #    define zmemcmp memcmp
    237 #    define zmemzero(dest, len) memset(dest, 0, len)
    238 #  endif
    239 #else
    240    extern void zmemcpy  OF((void* dest, const void* source, uInt len));
    241    extern int  zmemcmp  OF((const void* s1, const void* s2, uInt len));
    242    extern void zmemzero OF((void* dest, uInt len));
    243 #endif
    244 
    245 /* Diagnostic functions */
    246 #ifdef DEBUG
    247 #  include <stdio.h>
    248    extern int z_verbose;
    249    extern void z_error    OF((char *m));
    250 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
    251 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
    252 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
    253 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
    254 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
    255 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
    256 #else
    257 #  define Assert(cond,msg)
    258 #  define Trace(x)
    259 #  define Tracev(x)
    260 #  define Tracevv(x)
    261 #  define Tracec(c,x)
    262 #  define Tracecv(c,x)
    263 #endif
    264 
    265 
    266 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
    267 void   zcfree  OF((voidpf opaque, voidpf ptr));
    268 
    269 #define ZALLOC(strm, items, size) \
    270            (*((strm)->zalloc))((strm)->opaque, (items), (size))
    271 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
    272 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
    273 
    274 #endif /* _ZUTIL_H */
    275