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1875d55cf1
This more reliably handles control verbs like (*UTF8) that can only happen at the start of the pattern, and allows them in any ordering.
77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
/*
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* Copyright (c) 2015-2017, 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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/** \file
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* \brief Interface to Parser.
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*/
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#ifndef _RE_PARSER_H_
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#define _RE_PARSER_H_
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#include "ue2common.h"
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#include <memory>
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namespace ue2 {
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class Component;
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/** \brief Represents the current "mode flags" at any point in the parsing
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* process.
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*
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* This is necessary as some modes can be changed part-way through an
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* expression, such as in:
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*
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* /foo(?i)bar/
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*/
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struct ParseMode {
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ParseMode() {}
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explicit ParseMode(u32 hs_flags);
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bool caseless = false;
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bool dotall = false;
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bool ignore_space = false;
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bool multiline = false;
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bool ucp = false;
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bool utf8 = false;
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};
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/** \brief Parse the given regular expression into a \ref Component tree.
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*
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* The \a mode parameter should contain the initial mode flags, and will be
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* updated by the parser if additional global flags are introduced in the
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* expression (for example, via "(*UTF8)".)
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*
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* This call will throw a ParseError on failure.
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*/
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std::unique_ptr<Component> parse(const char *ptr, ParseMode &mode);
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} // namespace ue2
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#endif // _RE_PARSER_H_
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