contrib/libarchive/libarchive/archive_xxhash.h

   1 /*-
   2  * Copyright (c) 2014 Michihiro NAKAJIMA
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  */
  26
  27 #ifndef ARCHIVE_XXHASH_H_INCLUDED
  28 #define ARCHIVE_XXHASH_H_INCLUDED
  29
  30 #ifndef __LIBARCHIVE_BUILD
  31 #error This header is only to be used internally to libarchive.
  32 #endif
  33
  34
  35 typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode;
  36
  37 struct archive_xxhash {
  38         unsigned int  (*XXH32)(const void* input, unsigned int len,
  39                         unsigned int seed);
  40         void*         (*XXH32_init)(unsigned int seed);
  41         XXH_errorcode (*XXH32_update)(void* state, const void* input,
  42                         unsigned int len);
  43         unsigned int  (*XXH32_digest)(void* state);
  44 };
  45
  46 extern const struct archive_xxhash __archive_xxhash;
  47
  48 #endif