src/cobalt/xhr/xhr_response_data.h

// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// 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 COBALT_XHR_XHR_RESPONSE_DATA_H_
#define COBALT_XHR_XHR_RESPONSE_DATA_H_

#include <string>

#include "base/basictypes.h"

namespace cobalt {
namespace xhr {

// Simple wrapper for an array of data.
// Used by XMLHttpRequest to construct the response body.
class XhrResponseData {
 public:
  XhrResponseData();
  ~XhrResponseData();

  // Destroy the data_ and reset the size and capacity to 0.
  void Clear();
  // Allocate storage for |new_capacity_bytes| of data.
  void Reserve(size_t new_capacity_bytes);
  // Append |source_data|, |size_bytes| in length, to the data array.
  void Append(const uint8* source_data, size_t size_bytes);

  const uint8* data() const;
  uint8* data();

  const std::string& string() const { return data_; }

  size_t size() const { return data_.size(); }
  size_t capacity() const { return data_.capacity(); }

 private:
  void IncreaseMemoryUsage();
  void DecreaseMemoryUsage();

  std::string data_;
};

}  // namespace xhr
}  // namespace cobalt

#endif  // COBALT_XHR_XHR_RESPONSE_DATA_H_