1 /* 2 * Copyright (c) 2015-2017, Intel Corporation 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * * Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of Intel Corporation nor the names of its contributors 13 * may be used to endorse or promote products derived from this software 14 * without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /** \file 30 * \brief Shufti acceleration: compile code. 31 */ 32 33 #ifndef SHUFTI_COMPILE_H 34 #define SHUFTI_COMPILE_H 35 36 #include "ue2common.h" 37 #include "util/charreach.h" 38 #include "util/flat_containers.h" 39 40 #include <utility> 41 42 namespace ue2 { 43 44 /** \brief Single-byte variant. 45 * 46 * Returns -1 if unable to construct masks, otherwise returns number of bits 47 * used in the mask. 48 * 49 * Note: always able to construct masks for 8 or fewer characters. 50 */ 51 int shuftiBuildMasks(const CharReach &chars, u8 *lo, u8 *hi); 52 53 /** \brief Double-byte variant 54 * 55 * Returns false if we are unable to build the masks (too many buckets required) 56 */ 57 bool shuftiBuildDoubleMasks(const CharReach &onechar, 58 const flat_set<std::pair<u8, u8>> &twochar, 59 u8 *lo1, u8 *hi1, u8 *lo2, u8 *hi2); 60 61 #ifdef DUMP_SUPPORT 62 63 /** 64 * \brief Dump code: returns a CharReach with the reach that would match this 65 * shufti. 66 */ 67 CharReach shufti2cr(const u8 *lo, const u8 *hi); 68 69 #endif // DUMP_SUPPORT 70 71 } // namespace ue2 72 73 #endif // SHUFTI_COMPILE_H 74