| // 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 <vector> |
| |
| #include "core/fxcrt/fx_string.h" |
| |
| class CFX_BlockBuffer { |
| public: |
| explicit CFX_BlockBuffer(int32_t iAllocStep = 1024 * 1024); |
| ~CFX_BlockBuffer(); |
| |
| bool InitBuffer(int32_t iBufferSize = 1024 * 1024); |
| bool IsInitialized() { return m_iBufferSize / m_iAllocStep >= 1; } |
| |
| wchar_t* GetAvailableBlock(int32_t& iIndexInBlock); |
| inline int32_t GetAllocStep() const { return m_iAllocStep; } |
| inline int32_t& GetDataLengthRef() { return m_iDataLength; } |
| |
| inline void Reset(bool bReserveData = true) { |
| if (!bReserveData) |
| m_iStartPosition = 0; |
| m_iDataLength = 0; |
| } |
| |
| void SetTextChar(int32_t iIndex, wchar_t ch); |
| int32_t DeleteTextChars(int32_t iCount, bool bDirection = true); |
| void GetTextData(CFX_WideString& wsTextData, |
| int32_t iStart = 0, |
| int32_t iLength = -1) const; |
| |
| private: |
| inline void TextDataIndex2BufIndex(const int32_t iIndex, |
| int32_t& iBlockIndex, |
| int32_t& iInnerIndex) const; |
| void ClearBuffer(); |
| |
| std::vector<std::unique_ptr<wchar_t, FxFreeDeleter>> m_BlockArray; |
| int32_t m_iDataLength; |
| int32_t m_iBufferSize; |
| int32_t m_iAllocStep; |
| int32_t m_iStartPosition; |
| }; |
| |
| #endif // CORE_FXCRT_CFX_BLOCKBUFFER_H_ |