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Diffstat (limited to 'framework/src/suricata/src/util-spm-bm.h')
| -rw-r--r-- | framework/src/suricata/src/util-spm-bm.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/framework/src/suricata/src/util-spm-bm.h b/framework/src/suricata/src/util-spm-bm.h new file mode 100644 index 00000000..b3b97ced --- /dev/null +++ b/framework/src/suricata/src/util-spm-bm.h @@ -0,0 +1,49 @@ +/* Copyright (C) 2007-2010 Open Information Security Foundation + * + * You can copy, redistribute or modify this Program under the terms of + * the GNU General Public License version 2 as published by the Free + * Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +/** + * \file + * + * \author Pablo Rincon Crespo <pablo.rincon.crespo@gmail.com> + * + */ + +#ifndef __UTIL_SPM_BM__ +#define __UTIL_SPM_BM__ + +#include "suricata-common.h" +#include "suricata.h" + +#define ALPHABET_SIZE 256 + +/* Context for booyer moore */ +typedef struct BmCtx_ { + uint16_t bmBc[ALPHABET_SIZE]; + uint16_t *bmGs; // = SCMalloc(sizeof(int32_t)*(needlelen + 1)); +} BmCtx; + +/** Prepare and return a Boyer Moore context */ +BmCtx *BoyerMooreCtxInit(uint8_t *needle, uint16_t needle_len); +BmCtx *BoyerMooreNocaseCtxInit(uint8_t *needle, uint16_t needle_len); + +void BoyerMooreCtxToNocase(BmCtx *, uint8_t *, uint16_t); +uint8_t *BoyerMoore(uint8_t *x, uint16_t m, uint8_t *y, int32_t n, BmCtx *bm_ctx); +uint8_t *BoyerMooreNocase(uint8_t *x, uint16_t m, uint8_t *y, int32_t n, BmCtx *bm_ctx); +void BoyerMooreCtxDeInit(BmCtx *); + +#endif /* __UTIL_SPM_BM__ */ + |