| // Copyright 2017 The PDFium Authors |
| // 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 <stddef.h> |
| #include <stdint.h> |
| |
| #include "core/fxcrt/fx_codepage.h" |
| #include "core/fxcrt/fx_stream.h" |
| #include "core/fxcrt/fx_types.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/span.h" |
| |
| class CFX_SeekableStreamProxy final : public Retainable { |
| public: |
| CONSTRUCT_VIA_MAKE_RETAIN; |
| |
| FX_FILESIZE GetSize() const; // Estimate under worst possible expansion. |
| bool IsEOF() const; |
| |
| // Returns number of wchar_t elements placed into `buffer`. |
| size_t ReadBlock(pdfium::span<wchar_t> buffer); |
| |
| FX_CodePage GetCodePage() const { return m_wCodePage; } |
| void SetCodePage(FX_CodePage wCodePage); |
| |
| private: |
| enum class From { |
| Begin = 0, |
| Current, |
| }; |
| |
| explicit CFX_SeekableStreamProxy( |
| const RetainPtr<IFX_SeekableReadStream>& stream); |
| ~CFX_SeekableStreamProxy() override; |
| |
| FX_FILESIZE GetPosition() const; |
| void Seek(From eSeek, FX_FILESIZE iOffset); |
| size_t ReadData(pdfium::span<uint8_t> buffer); |
| |
| FX_CodePage m_wCodePage = FX_CodePage::kDefANSI; |
| size_t m_wBOMLength = 0; |
| FX_FILESIZE m_iPosition = 0; |
| RetainPtr<IFX_SeekableReadStream> const m_pStream; |
| }; |
| |
| #endif // CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_ |