src/support/file.h

/*
 * Copyright 2015 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.
 */

//
// FIle helpers.
//

#ifndef wasm_support_file_h
#define wasm_support_file_h

#include <fstream>
#include <string>
#include <utility>
#include <vector>

namespace wasm {

namespace Flags {
  enum BinaryOption {
    Binary,
    Text
  };
  enum DebugOption {
    Debug,
    Release
  };
}

template <typename T>
T read_file(const std::string &filename, Flags::BinaryOption binary, Flags::DebugOption debug);
// Declare the valid explicit specializations.
extern template std::string read_file<>(const std::string &, Flags::BinaryOption, Flags::DebugOption);
extern template std::vector<char> read_file<>(const std::string &, Flags::BinaryOption, Flags::DebugOption);

class Output {
 public:
  // An empty filename will open stdout instead.
  Output(const std::string &filename, Flags::BinaryOption binary, Flags::DebugOption debug);
  ~Output() = default;
  template <typename T>
  std::ostream &operator<<(const T &v) {
    return out << v;
  }

  std::ostream& getStream() {
    return out;
  }

 private:
  Output() = delete;
  Output(const Output &) = delete;
  Output &operator=(const Output &) = delete;
  std::ofstream outfile;
  std::ostream out;
};
}

#endif  // wasm_support_file_h