mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
d67322a186
Also:
- Use {}-style list initialisation for SourceLocation construction
- Introduce new system includes
- Changes the API of the Scanner to take source as value (with move) as opposed to as a reference
109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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This file is derived from the file "scanner.cc", which was part of the
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V8 project. The original copyright header follows:
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Copyright 2006-2012, the V8 project authors. All rights reserved.
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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
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of Google Inc. nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @author Christian <c@ethdev.com>
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* @date 2014
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* Solidity scanner.
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*/
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#include <liblangutil/CharStream.h>
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#include <liblangutil/Exceptions.h>
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using namespace std;
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using namespace langutil;
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char CharStream::advanceAndGet(size_t _chars)
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{
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if (isPastEndOfInput())
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return 0;
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m_position += _chars;
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if (isPastEndOfInput())
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return 0;
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return m_source[m_position];
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}
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char CharStream::rollback(size_t _amount)
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{
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solAssert(m_position >= _amount, "");
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m_position -= _amount;
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return get();
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}
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string CharStream::lineAtPosition(int _position) const
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{
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// if _position points to \n, it returns the line before the \n
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using size_type = string::size_type;
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size_type searchStart = min<size_type>(m_source.size(), _position);
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if (searchStart > 0)
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searchStart--;
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size_type lineStart = m_source.rfind('\n', searchStart);
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if (lineStart == string::npos)
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lineStart = 0;
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else
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lineStart++;
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return m_source.substr(lineStart, min(m_source.find('\n', lineStart),
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m_source.size()) - lineStart);
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}
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tuple<int, int> CharStream::translatePositionToLineColumn(int _position) const
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{
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using size_type = string::size_type;
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size_type searchPosition = min<size_type>(m_source.size(), _position);
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int lineNumber = count(m_source.begin(), m_source.begin() + searchPosition, '\n');
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size_type lineStart;
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if (searchPosition == 0)
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lineStart = 0;
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else
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{
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lineStart = m_source.rfind('\n', searchPosition - 1);
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lineStart = lineStart == string::npos ? 0 : lineStart + 1;
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}
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return tuple<int, int>(lineNumber, searchPosition - lineStart);
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}
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