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// Copyright 2017 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef CORE_FXCRT_CFX_BINARYBUF_H_
#define CORE_FXCRT_CFX_BINARYBUF_H_
#include <memory>
#include "core/fxcrt/fx_memory.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
class CFX_BinaryBuf {
public:
CFX_BinaryBuf();
explicit CFX_BinaryBuf(FX_STRSIZE size);
virtual ~CFX_BinaryBuf();
uint8_t* GetBuffer() const { return m_pBuffer.get(); }
FX_STRSIZE GetSize() const { return m_DataSize; }
virtual FX_STRSIZE GetLength() const;
bool IsEmpty() const { return GetLength() == 0; }
void Clear();
void EstimateSize(FX_STRSIZE size, FX_STRSIZE alloc_step = 0);
void AppendBlock(const void* pBuf, FX_STRSIZE size);
void AppendString(const CFX_ByteString& str) {
AppendBlock(str.c_str(), str.GetLength());
}
void AppendByte(uint8_t byte) {
ExpandBuf(1);
m_pBuffer.get()[m_DataSize++] = byte;
}
void InsertBlock(FX_STRSIZE pos, const void* pBuf, FX_STRSIZE size);
void Delete(FX_STRSIZE start_index, FX_STRSIZE count);
// Releases ownership of |m_pBuffer| and returns it.
std::unique_ptr<uint8_t, FxFreeDeleter> DetachBuffer();
protected:
void ExpandBuf(FX_STRSIZE size);
FX_STRSIZE m_AllocStep;
FX_STRSIZE m_AllocSize;
FX_STRSIZE m_DataSize;
std::unique_ptr<uint8_t, FxFreeDeleter> m_pBuffer;
};
#endif // CORE_FXCRT_CFX_BINARYBUF_H_
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