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67 lines
2.8 KiB
C++
67 lines
2.8 KiB
C++
/*
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* Copyright (c) 2015, 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 ROSE_BUILD_WIDTH_H
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#define ROSE_BUILD_WIDTH_H
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#include "rose_build_impl.h"
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#include "ue2common.h"
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namespace ue2 {
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class RoseBuildImpl;
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/* returns a lower bound on the minimum number of bytes required for match to be
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* raised up to the user which requires the given literal table to be used
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*
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* returns ROSE_BOUND_INF if the table can never produce matches */
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u32 findMinWidth(const RoseBuildImpl &tbi, enum rose_literal_table table);
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/* returns an upper bound on the maximum length of a buffer that can result in
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* matches. If there are any patterns which are not bianchored (start and end
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* anchored), then there is no such limit and ROSE_BOUND_INF is returned.
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*/
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u32 findMaxBAWidth(const RoseBuildImpl &tbi);
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/* returns an upper bound on the maximum length of a buffer that can result in
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* matches and requires that the given table to be used. If there are any
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* patterns which are not bianchored (start and end anchored), then there is no
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* such limit and ROSE_BOUND_INF is returned.
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*/
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u32 findMaxBAWidth(const RoseBuildImpl &tbi, enum rose_literal_table table);
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/**
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* Note: there is no function for determining the min width of the whole rose
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* as this is more easily done by the NG layer which has access to the full
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* nfagraphs before they are chopped into little pieces.
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*/
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} // namespace ue2
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#endif
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