zone_text_buffer.h

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// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
 
#ifndef RUNTIME_VM_ZONE_TEXT_BUFFER_H_
#define RUNTIME_VM_ZONE_TEXT_BUFFER_H_
 
#include "platform/text_buffer.h"
#include "vm/allocation.h"
#include "vm/globals.h"
 
namespace dart {
 
class String;
class Zone;
 
// ZoneTextBuffer allocates the character buffer in the given zone. Thus,
// pointers returned by buffer() have the same lifetime as the zone.
class ZoneTextBuffer : public BaseTextBuffer {
 public:
  explicit ZoneTextBuffer(Zone* zone, intptr_t initial_capacity = 64);
  ~ZoneTextBuffer() {}
 
  // Allocates a new internal buffer. Thus, the contents of buffers returned by
  // previous calls to buffer() are no longer affected by this object.
  void Clear();
 
 private:
  bool EnsureCapacity(intptr_t len);
  Zone* zone_;
 
  DISALLOW_COPY_AND_ASSIGN(ZoneTextBuffer);
};
 
}  // namespace dart
 
#endif  // RUNTIME_VM_ZONE_TEXT_BUFFER_H_