data/windows/unzipfx-carla-control/crc32.h

   1 /*
   2   Copyright (c) 1990-2008 Info-ZIP.  All rights reserved.
   3
   4   See the accompanying file LICENSE, version 2000-Apr-09 or later
   5   (the contents of which are also included in zip.h) for terms of use.
   6   If, for some reason, all these files are missing, the Info-ZIP license
   7   also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
   8 */
   9 /* crc32.h -- compute the CRC-32 of a data stream
  10  * Copyright (C) 1995 Mark Adler
  11  * For conditions of distribution and use, see copyright notice in zlib.h
  12  */
  13
  14 #ifndef __crc32_h
  15 #define __crc32_h       /* identifies this source module */
  16
  17 /* This header should be read AFTER zip.h resp. unzip.h
  18  * (the latter with UNZIP_INTERNAL defined...).
  19  */
  20
  21 #ifndef OF
  22 #  define OF(a) a
  23 #endif
  24 #ifndef ZCONST
  25 #  define ZCONST const
  26 #endif
  27
  28 #ifdef DYNALLOC_CRCTAB
  29    void     free_crc_table  OF((void));
  30 #endif
  31 #ifndef USE_ZLIB
  32    ZCONST ulg near *get_crc_table  OF((void));
  33 #endif
  34 #if (defined(USE_ZLIB) || defined(CRC_TABLE_ONLY))
  35 #  ifdef IZ_CRC_BE_OPTIMIZ
  36 #    undef IZ_CRC_BE_OPTIMIZ
  37 #  endif
  38 #else /* !(USE_ZLIB || CRC_TABLE_ONLY) */
  39    ulg      crc32           OF((ulg crc, ZCONST uch *buf, extent len));
  40 #endif /* ?(USE_ZLIB || CRC_TABLE_ONLY) */
  41
  42 #ifndef CRC_32_TAB
  43 #  define CRC_32_TAB     crc_32_tab
  44 #endif
  45
  46 #ifdef CRC32
  47 #  undef CRC32
  48 #endif
  49 #ifdef IZ_CRC_BE_OPTIMIZ
  50 #  define CRC32UPD(c, crctab) (crctab[((c) >> 24)] ^ ((c) << 8))
  51 #  define CRC32(c, b, crctab) (crctab[(((int)(c) >> 24) ^ (b))] ^ ((c) << 8))
  52 #  define REV_BE(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
  53                     (((w)&0xff00)<<8)+(((w)&0xff)<<24))
  54 #else
  55 #  define CRC32UPD(c, crctab) (crctab[((int)(c)) & 0xff] ^ ((c) >> 8))
  56 #  define CRC32(c, b, crctab) (crctab[((int)(c) ^ (b)) & 0xff] ^ ((c) >> 8))
  57 #  define REV_BE(w) w
  58 #endif
  59
  60 #endif /* !__crc32_h */