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