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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_BLOCKBUFFER_H_
#define CORE_FXCRT_CFX_BLOCKBUFFER_H_
#include <stdint.h>
#include <memory>
#include <utility>
#include <vector>
#include "core/fxcrt/fx_string.h"
class CFX_BlockBuffer {
public:
CFX_BlockBuffer();
~CFX_BlockBuffer();
bool InitBuffer();
bool IsInitialized() { return m_iBufferSize / GetAllocStep() >= 1; }
std::pair<wchar_t*, int32_t> GetAvailableBlock();
int32_t GetAllocStep() const;
// This is ... scary. This returns a ref, which the XMLSyntaxParser stores
// and modifies.
int32_t& GetDataLengthRef() { return m_iDataLength; }
void Reset(bool bReserveData) {
if (!bReserveData)
m_iStartPosition = 0;
m_iDataLength = 0;
}
void SetTextChar(int32_t iIndex, wchar_t ch);
int32_t DeleteTextChars(int32_t iCount);
CFX_WideString GetTextData(int32_t iStart, int32_t iLength) const;
private:
std::pair<int32_t, int32_t> TextDataIndex2BufIndex(
const int32_t iIndex) const;
std::vector<std::unique_ptr<wchar_t, FxFreeDeleter>> m_BlockArray;
int32_t m_iDataLength;
int32_t m_iBufferSize;
int32_t m_iStartPosition;
};
#endif // CORE_FXCRT_CFX_BLOCKBUFFER_H_
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