mirror of
https://github.com/VectorCamp/vectorscan.git
synced 2025-06-28 16:41:01 +03:00
106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
/*
|
|
* Copyright (c) 2015, Intel Corporation
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/** \file
|
|
* \brief Word Boundary Assertion (\\b or \\B)
|
|
*/
|
|
#include "ComponentWordBoundary.h"
|
|
#include "buildstate.h"
|
|
#include "parse_error.h"
|
|
#include "Parser.h"
|
|
#include "position_info.h"
|
|
#include "nfagraph/ng_builder.h"
|
|
|
|
using namespace std;
|
|
|
|
namespace ue2 {
|
|
|
|
ComponentWordBoundary::ComponentWordBoundary(u32 loc_in, bool neg,
|
|
const ParseMode &mode)
|
|
: loc(loc_in), position(GlushkovBuildState::POS_UNINITIALIZED),
|
|
negated(neg), ucp(mode.ucp), prefilter(false) {}
|
|
|
|
ComponentWordBoundary::~ComponentWordBoundary() {
|
|
// empty
|
|
}
|
|
|
|
ComponentWordBoundary * ComponentWordBoundary::clone() const {
|
|
return new ComponentWordBoundary(*this);
|
|
}
|
|
|
|
vector<PositionInfo> ComponentWordBoundary::first() const {
|
|
vector<PositionInfo> firsts;
|
|
firsts.emplace_back(position);
|
|
return firsts;
|
|
}
|
|
|
|
vector<PositionInfo> ComponentWordBoundary::last() const {
|
|
// Same as firsts
|
|
return first();
|
|
}
|
|
|
|
bool ComponentWordBoundary::empty() const {
|
|
return false;
|
|
}
|
|
|
|
bool ComponentWordBoundary::repeatable() const {
|
|
return false;
|
|
}
|
|
|
|
void ComponentWordBoundary::notePositions(GlushkovBuildState &bs) {
|
|
NFABuilder &builder = bs.getBuilder();
|
|
position = builder.makePositions(1);
|
|
|
|
if (ucp) {
|
|
assert(prefilter); // only in prefiltering mode!
|
|
if (negated) {
|
|
builder.setAssertFlag(position, POS_FLAG_ASSERT_WORD_TO_WORD_UCP
|
|
| POS_FLAG_ASSERT_NONWORD_TO_NONWORD_UCP);
|
|
} else {
|
|
builder.setAssertFlag(position, POS_FLAG_ASSERT_WORD_TO_NONWORD_UCP
|
|
| POS_FLAG_ASSERT_NONWORD_TO_WORD_UCP);
|
|
}
|
|
} else {
|
|
if (negated) {
|
|
builder.setAssertFlag(position, POS_FLAG_ASSERT_WORD_TO_WORD
|
|
| POS_FLAG_ASSERT_NONWORD_TO_NONWORD);
|
|
} else {
|
|
builder.setAssertFlag(position, POS_FLAG_ASSERT_WORD_TO_NONWORD
|
|
| POS_FLAG_ASSERT_NONWORD_TO_WORD);
|
|
}
|
|
}
|
|
recordPosBounds(position, position + 1);
|
|
}
|
|
|
|
void ComponentWordBoundary::buildFollowSet(GlushkovBuildState&,
|
|
const vector<PositionInfo>&) {
|
|
// No internal connections, nowt to do
|
|
}
|
|
|
|
} // namespace ue2
|