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/*
* Copyright 2017 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef WABT_LEXER_SOURCE_LINE_FINDER_H_
#define WABT_LEXER_SOURCE_LINE_FINDER_H_
#include <memory>
#include <string>
#include <vector>
#include "wabt/common.h"
#include "wabt/lexer-source.h"
#include "wabt/range.h"
namespace wabt {
class LexerSourceLineFinder {
public:
struct SourceLine {
std::string line;
int column_offset;
};
explicit LexerSourceLineFinder(std::unique_ptr<LexerSource>);
Result GetSourceLine(const Location& loc,
Offset max_line_length,
SourceLine* out_source_line);
Result GetLineOffsets(int line, OffsetRange* out_offsets);
private:
static OffsetRange ClampSourceLineOffsets(OffsetRange line_offset_range,
ColumnRange column_range,
Offset max_line_length);
bool IsLineCached(int line) const;
OffsetRange GetCachedLine(int line) const;
std::unique_ptr<LexerSource> source_;
std::vector<OffsetRange> line_ranges_;
Offset next_line_start_;
bool last_cr_; // Last read character was a '\r' (carriage return).
bool eof_;
};
} // namespace wabt
#endif // WABT_LEXER_SOURCE_LINE_FINDER_H_
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