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 #ifndef ACCEL_COMPILE_H 30 #define ACCEL_COMPILE_H 31 32 #include "ue2common.h" 33 #include "util/charreach.h" 34 #include "util/flat_containers.h" 35 36 union AccelAux; 37 38 namespace ue2 { 39 40 struct AccelInfo { AccelInfoAccelInfo41 AccelInfo() : single_offset(0U), double_offset(0U), 42 single_stops(CharReach::dot()) {} 43 u32 single_offset; /**< offset correction to apply to single schemes */ 44 u32 double_offset; /**< offset correction to apply to double schemes */ 45 CharReach double_stop1; /**< single-byte accel stop literals for double 46 * schemes */ 47 flat_set<std::pair<u8, u8>> double_stop2; /**< double-byte accel stop 48 * literals */ 49 CharReach single_stops; /**< escapes for single byte acceleration */ 50 }; 51 52 bool buildAccelAux(const AccelInfo &info, AccelAux *aux); 53 54 /* returns true is the escape set can be handled with a masked double_verm */ 55 bool buildDvermMask(const flat_set<std::pair<u8, u8>> &escape_set, 56 u8 *m1_out = nullptr, u8 *m2_out = nullptr); 57 58 } // namespace ue2 59 60 #endif 61