| // 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_SEEKABLESTREAMPROXY_H_ |
| #define CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_ |
| |
| #include <algorithm> |
| |
| #include "core/fxcrt/cfx_retain_ptr.h" |
| #include "core/fxcrt/fx_stream.h" |
| #include "core/fxcrt/fx_system.h" |
| |
| class CFX_SeekableStreamProxy : public CFX_Retainable { |
| public: |
| enum class Pos { |
| Begin = 0, |
| Current, |
| }; |
| |
| template <typename T, typename... Args> |
| friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args); |
| |
| FX_FILESIZE GetLength() const { return m_pStream->GetSize(); } |
| FX_FILESIZE GetPosition() { return m_iPosition; } |
| FX_STRSIZE GetBOMLength() const { return std::max(0, m_wBOMLength); } |
| bool IsEOF() const { return m_iPosition >= GetLength(); } |
| |
| void Seek(CFX_SeekableStreamProxy::Pos eSeek, FX_FILESIZE iOffset); |
| FX_STRSIZE ReadString(wchar_t* pStr, FX_STRSIZE iMaxLength, bool* bEOS); |
| |
| void WriteString(const CFX_WideStringC& str); |
| |
| uint16_t GetCodePage() const { return m_wCodePage; } |
| void SetCodePage(uint16_t wCodePage); |
| |
| private: |
| CFX_SeekableStreamProxy(const CFX_RetainPtr<IFX_SeekableStream>& stream, |
| bool isWriteSteam); |
| CFX_SeekableStreamProxy(uint8_t* data, FX_STRSIZE size); |
| ~CFX_SeekableStreamProxy() override; |
| |
| FX_STRSIZE ReadData(uint8_t* pBuffer, FX_STRSIZE iBufferSize); |
| |
| bool m_IsWriteStream; |
| uint16_t m_wCodePage; |
| FX_STRSIZE m_wBOMLength; |
| FX_FILESIZE m_iPosition; |
| CFX_RetainPtr<IFX_SeekableStream> m_pStream; |
| }; |
| |
| #endif // CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_ |