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/*
* Copyright 2016 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_WAST_LEXER_H_
#define WABT_WAST_LEXER_H_
#include <cstddef>
#include <cstdio>
#include <memory>
#include "src/common.h"
#include "src/lexer-source-line-finder.h"
#include "src/literal.h"
#include "src/make-unique.h"
#include "src/opcode.h"
#include "src/token.h"
namespace wabt {
class ErrorHandler;
class LexerSource;
class WastParser;
class WastLexer {
public:
WABT_DISALLOW_COPY_AND_ASSIGN(WastLexer);
WastLexer(std::unique_ptr<LexerSource> source, string_view filename);
~WastLexer();
// Convenience functions.
static std::unique_ptr<WastLexer> CreateBufferLexer(string_view filename,
const void* data,
size_t size);
Token GetToken(WastParser* parser);
Result Fill(size_t need);
// TODO(binji): Move this out of the lexer.
std::unique_ptr<LexerSourceLineFinder> MakeLineFinder() {
return MakeUnique<LexerSourceLineFinder>(source_->Clone());
}
private:
Location GetLocation();
Literal MakeLiteral(LiteralType);
std::string GetText(size_t at = 0);
std::unique_ptr<LexerSource> source_;
std::string filename_;
int line_;
int comment_nesting_;
size_t buffer_file_offset_; // File offset of the start of the buffer.
size_t line_file_offset_; // File offset of the start of the current line.
// Lexing data needed by re2c.
bool eof_;
char* buffer_;
size_t buffer_size_;
char* marker_;
char* next_pos_;
char* cursor_;
char* limit_;
};
} // namespace wabt
#endif /* WABT_WAST_LEXER_H_ */
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