The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/zlib/zutil.h

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    1 /* zutil.h -- internal interface and configuration of the compression library
    2  * Copyright (C) 1995-2022 Jean-loup Gailly, Mark Adler
    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 /* @(#) $Id$ */
   12 
   13 #ifndef ZUTIL_H
   14 #define ZUTIL_H
   15 
   16 #ifdef HAVE_HIDDEN
   17 #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
   18 #else
   19 #  define ZLIB_INTERNAL
   20 #endif
   21 
   22 #include "zlib.h"
   23 
   24 #if defined(STDC) && !defined(Z_SOLO)
   25 #  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
   26 #    include <stddef.h>
   27 #  endif
   28 #  include <string.h>
   29 #  include <stdlib.h>
   30 #endif
   31 
   32 #ifndef local
   33 #  define local static
   34 #endif
   35 /* since "static" is used to mean two completely different things in C, we
   36    define "local" for the non-static meaning of "static", for readability
   37    (compile with -Dlocal if your debugger can't find static symbols) */
   38 
   39 typedef unsigned char  uch;
   40 typedef uch FAR uchf;
   41 typedef unsigned short ush;
   42 typedef ush FAR ushf;
   43 typedef unsigned long  ulg;
   44 
   45 #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)
   46 #  include <limits.h>
   47 #  if (ULONG_MAX == 0xffffffffffffffff)
   48 #    define Z_U8 unsigned long
   49 #  elif (ULLONG_MAX == 0xffffffffffffffff)
   50 #    define Z_U8 unsigned long long
   51 #  elif (UINT_MAX == 0xffffffffffffffff)
   52 #    define Z_U8 unsigned
   53 #  endif
   54 #endif
   55 
   56 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
   57 /* (size given to avoid silly warnings with Visual C++) */
   58 
   59 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
   60 
   61 #define ERR_RETURN(strm,err) \
   62   return (strm->msg = ERR_MSG(err), (err))
   63 /* To be used only when the state is known to be valid */
   64 
   65         /* common constants */
   66 
   67 #ifndef DEF_WBITS
   68 #  define DEF_WBITS MAX_WBITS
   69 #endif
   70 /* default windowBits for decompression. MAX_WBITS is for compression only */
   71 
   72 #if MAX_MEM_LEVEL >= 8
   73 #  define DEF_MEM_LEVEL 8
   74 #else
   75 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
   76 #endif
   77 /* default memLevel */
   78 
   79 #define STORED_BLOCK 0
   80 #define STATIC_TREES 1
   81 #define DYN_TREES    2
   82 /* The three kinds of block type */
   83 
   84 #define MIN_MATCH  3
   85 #define MAX_MATCH  258
   86 /* The minimum and maximum match lengths */
   87 
   88 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
   89 
   90         /* target dependencies */
   91 
   92 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
   93 #  define OS_CODE  0x00
   94 #  ifndef Z_SOLO
   95 #    if defined(__TURBOC__) || defined(__BORLANDC__)
   96 #      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
   97          /* Allow compilation with ANSI keywords only enabled */
   98          void _Cdecl farfree( void *block );
   99          void *_Cdecl farmalloc( unsigned long nbytes );
  100 #      else
  101 #        include <alloc.h>
  102 #      endif
  103 #    else /* MSC or DJGPP */
  104 #      include <malloc.h>
  105 #    endif
  106 #  endif
  107 #endif
  108 
  109 #ifdef AMIGA
  110 #  define OS_CODE  1
  111 #endif
  112 
  113 #if defined(VAXC) || defined(VMS)
  114 #  define OS_CODE  2
  115 #  define F_OPEN(name, mode) \
  116      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
  117 #endif
  118 
  119 #ifdef __370__
  120 #  if __TARGET_LIB__ < 0x20000000
  121 #    define OS_CODE 4
  122 #  elif __TARGET_LIB__ < 0x40000000
  123 #    define OS_CODE 11
  124 #  else
  125 #    define OS_CODE 8
  126 #  endif
  127 #endif
  128 
  129 #if defined(ATARI) || defined(atarist)
  130 #  define OS_CODE  5
  131 #endif
  132 
  133 #ifdef OS2
  134 #  define OS_CODE  6
  135 #  if defined(M_I86) && !defined(Z_SOLO)
  136 #    include <malloc.h>
  137 #  endif
  138 #endif
  139 
  140 #if defined(MACOS) || defined(TARGET_OS_MAC)
  141 #  define OS_CODE  7
  142 #  ifndef Z_SOLO
  143 #    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
  144 #      include <unix.h> /* for fdopen */
  145 #    else
  146 #      ifndef fdopen
  147 #        define fdopen(fd,mode) NULL /* No fdopen() */
  148 #      endif
  149 #    endif
  150 #  endif
  151 #endif
  152 
  153 #ifdef __acorn
  154 #  define OS_CODE 13
  155 #endif
  156 
  157 #if defined(WIN32) && !defined(__CYGWIN__)
  158 #  define OS_CODE  10
  159 #endif
  160 
  161 #ifdef _BEOS_
  162 #  define OS_CODE  16
  163 #endif
  164 
  165 #ifdef __TOS_OS400__
  166 #  define OS_CODE 18
  167 #endif
  168 
  169 #ifdef __APPLE__
  170 #  define OS_CODE 19
  171 #endif
  172 
  173 #if defined(_BEOS_) || defined(RISCOS)
  174 #  define fdopen(fd,mode) NULL /* No fdopen() */
  175 #endif
  176 
  177 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
  178 #  if defined(_WIN32_WCE)
  179 #    define fdopen(fd,mode) NULL /* No fdopen() */
  180 #  else
  181 #    define fdopen(fd,type)  _fdopen(fd,type)
  182 #  endif
  183 #endif
  184 
  185 #if defined(__BORLANDC__) && !defined(MSDOS)
  186   #pragma warn -8004
  187   #pragma warn -8008
  188   #pragma warn -8066
  189 #endif
  190 
  191 /* provide prototypes for these when building zlib without LFS */
  192 #if !defined(_WIN32) && \
  193     (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
  194     ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
  195     ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
  196 #endif
  197 
  198         /* common defaults */
  199 
  200 #ifndef OS_CODE
  201 #  define OS_CODE  3     /* assume Unix */
  202 #endif
  203 
  204 #ifndef F_OPEN
  205 #  define F_OPEN(name, mode) fopen((name), (mode))
  206 #endif
  207 
  208          /* functions */
  209 
  210 #if defined(pyr) || defined(Z_SOLO)
  211 #  define NO_MEMCPY
  212 #endif
  213 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
  214  /* Use our own functions for small and medium model with MSC <= 5.0.
  215   * You may have to use the same strategy for Borland C (untested).
  216   * The __SC__ check is for Symantec.
  217   */
  218 #  define NO_MEMCPY
  219 #endif
  220 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
  221 #  define HAVE_MEMCPY
  222 #endif
  223 #ifdef HAVE_MEMCPY
  224 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
  225 #    define zmemcpy _fmemcpy
  226 #    define zmemcmp _fmemcmp
  227 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
  228 #  else
  229 #    define zmemcpy memcpy
  230 #    define zmemcmp memcmp
  231 #    define zmemzero(dest, len) memset(dest, 0, len)
  232 #  endif
  233 #else
  234    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
  235    int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
  236    void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
  237 #endif
  238 
  239 /* Diagnostic functions */
  240 #ifdef ZLIB_DEBUG
  241 #  include <stdio.h>
  242    extern int ZLIB_INTERNAL z_verbose;
  243    extern void ZLIB_INTERNAL z_error OF((char *m));
  244 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
  245 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
  246 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
  247 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
  248 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
  249 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
  250 #else
  251 #  define Assert(cond,msg)
  252 #  define Trace(x)
  253 #  define Tracev(x)
  254 #  define Tracevv(x)
  255 #  define Tracec(c,x)
  256 #  define Tracecv(c,x)
  257 #endif
  258 
  259 #if !defined(Z_SOLO) || defined(_KERNEL)
  260    voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
  261                                     unsigned size));
  262    void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
  263 #endif
  264 
  265 #define ZALLOC(strm, items, size) \
  266            (*((strm)->zalloc))((strm)->opaque, (items), (size))
  267 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
  268 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
  269 
  270 /* Reverse the bytes in a 32-bit value */
  271 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
  272                     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
  273 
  274 #endif /* ZUTIL_H */

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