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https://github.com/VectorCamp/vectorscan.git
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87 lines
3.4 KiB
C++
87 lines
3.4 KiB
C++
/*
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* Copyright (c) 2015-2016, Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ACCEL_COMPILE_H
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#define ACCEL_COMPILE_H
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#include "ue2common.h"
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#include "util/charreach.h"
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#include "util/ue2_containers.h"
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union AccelAux;
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namespace ue2 {
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struct MultibyteAccelInfo {
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/* multibyte accel schemes, ordered by strength */
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enum multiaccel_type {
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MAT_SHIFT,
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MAT_SHIFTGRAB,
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MAT_DSHIFT,
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MAT_DSHIFTGRAB,
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MAT_LONG,
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MAT_LONGGRAB,
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MAT_MAX,
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MAT_NONE = MAT_MAX
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};
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CharReach cr;
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u32 offset = 0;
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u32 len1 = 0;
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u32 len2 = 0;
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multiaccel_type type = MAT_NONE;
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};
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struct AccelInfo {
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AccelInfo() : single_offset(0U), double_offset(0U),
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single_stops(CharReach::dot()),
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multiaccel_offset(0), ma_len1(0), ma_len2(0),
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ma_type(MultibyteAccelInfo::MAT_NONE) {}
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u32 single_offset; /**< offset correction to apply to single schemes */
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u32 double_offset; /**< offset correction to apply to double schemes */
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CharReach double_stop1; /**< single-byte accel stop literals for double
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* schemes */
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flat_set<std::pair<u8, u8>> double_stop2; /**< double-byte accel stop
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* literals */
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CharReach single_stops; /**< escapes for single byte acceleration */
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u32 multiaccel_offset; /**< offset correction to apply to multibyte schemes */
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CharReach multiaccel_stops; /**< escapes for multibyte acceleration */
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u32 ma_len1; /**< multiaccel len1 */
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u32 ma_len2; /**< multiaccel len2 */
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MultibyteAccelInfo::multiaccel_type ma_type; /**< multiaccel type */
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};
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bool buildAccelAux(const AccelInfo &info, AccelAux *aux);
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/* returns true is the escape set can be handled with a masked double_verm */
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bool buildDvermMask(const flat_set<std::pair<u8, u8>> &escape_set,
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u8 *m1_out = nullptr, u8 *m2_out = nullptr);
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} // namespace ue2
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#endif
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