xref: /freebsd-10-stable/contrib/libarchive/libarchive/archive_xxhash.h

/*-
 * Copyright (c) 2014 Michihiro NAKAJIMA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef ARCHIVE_XXHASH_H_INCLUDED
#define ARCHIVE_XXHASH_H_INCLUDED

#ifndef __LIBARCHIVE_BUILD
#error This header is only to be used internally to libarchive.
#endif


typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode;

struct archive_xxhash {
	unsigned int  (*XXH32)(const void* input, unsigned int len,
			unsigned int seed);
	void*         (*XXH32_init)(unsigned int seed);
	XXH_errorcode (*XXH32_update)(void* state, const void* input,
			unsigned int len);
	unsigned int  (*XXH32_digest)(void* state);
};

extern const struct archive_xxhash __archive_xxhash;

#endif