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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_H_

#define WABT_LEXER_SOURCE_H_

#include <cstddef>

#include <memory>

#include <string>

#include <vector>

#include "wabt/common.h"

#include "wabt/range.h"

namespace wabt {

class LexerSource {

 public:

  LexerSource(const void* data, Offset size);

  std::unique_ptr<LexerSource> Clone();

  Result Tell(Offset* out_offset);

  size_t Fill(void* dest, size_t size);

  Result ReadRange(OffsetRange, std::vector<char>* out_data);

  Result Seek(Offset offset);

  WABT_DISALLOW_COPY_AND_ASSIGN(LexerSource);

  const void* data() { return data_; }

  Offset size() { return size_; }

 private:

  const void* data_;

  Offset size_;

  Offset read_offset_;

};

}  // namespace wabt

#endif  // WABT_LEXER_SOURCE_H_