86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/****************************************************************************
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*
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* Copyright (C) 2003-2010 Sourcefire, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License Version 2 as
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* published by the Free Software Foundation. You may not use, modify or
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* distribute this program under any other version of the GNU General
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* Public License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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****************************************************************************/
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/*
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sfhashfcn.h
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*/
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#ifndef SFHASHFCN_INCLUDE
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#define SFHASHFCN_INCLUDE
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <time.h>
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#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
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#define mix(a,b,c) \
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{ \
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a -= c; a ^= rot(c, 4); c += b; \
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b -= a; b ^= rot(a, 6); a += c; \
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c -= b; c ^= rot(b, 8); b += a; \
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a -= c; a ^= rot(c,16); c += b; \
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b -= a; b ^= rot(a,19); a += c; \
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c -= b; c ^= rot(b, 4); b += a; \
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}
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#define final(a,b,c) \
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{ \
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c ^= b; c -= rot(b,14); \
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a ^= c; a -= rot(c,11); \
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b ^= a; b -= rot(a,25); \
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c ^= b; c -= rot(b,16); \
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a ^= c; a -= rot(c,4); \
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b ^= a; b -= rot(a,14); \
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c ^= b; c -= rot(b,24); \
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}
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typedef struct _SFHASHFCN {
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unsigned seed;
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unsigned scale;
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unsigned hardener;
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unsigned (*hash_fcn)(struct _SFHASHFCN * p,
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unsigned char *d,
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int n );
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int (*keycmp_fcn)( const void *s1,
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const void *s2,
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size_t n);
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} SFHASHFCN;
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SFHASHFCN * sfhashfcn_new( int nrows );
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void sfhashfcn_free( SFHASHFCN * p );
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void sfhashfcn_static( SFHASHFCN * p );
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unsigned sfhashfcn_hash( SFHASHFCN * p, unsigned char *d, int n );
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int sfhashfcn_set_keyops( SFHASHFCN * p,
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unsigned (*hash_fcn)( SFHASHFCN * p,
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unsigned char *d,
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int n),
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int (*keycmp_fcn)( const void *s1,
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const void *s2,
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size_t n));
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#endif
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