49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
// Copyright 2017 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_
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#define CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_
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#include "core/fxcrt/fx_stream.h"
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#include "core/fxcrt/fx_system.h"
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#include "core/fxcrt/retain_ptr.h"
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class CFX_SeekableStreamProxy final : public Retainable {
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public:
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template <typename T, typename... Args>
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friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
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// Unlike IFX_SeekableStreamProxy, buffers and sizes are always in terms
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// of the number of wchar_t elementss, not bytes.
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FX_FILESIZE GetSize(); // Estimate under worst possible expansion.
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bool IsEOF();
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size_t ReadBlock(wchar_t* pStr, size_t size);
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uint16_t GetCodePage() const { return m_wCodePage; }
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void SetCodePage(uint16_t wCodePage);
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private:
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enum class From {
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Begin = 0,
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Current,
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};
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explicit CFX_SeekableStreamProxy(
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const RetainPtr<IFX_SeekableReadStream>& stream);
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~CFX_SeekableStreamProxy() override;
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FX_FILESIZE GetPosition();
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void Seek(From eSeek, FX_FILESIZE iOffset);
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size_t ReadData(uint8_t* pBuffer, size_t iBufferSize);
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uint16_t m_wCodePage;
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size_t m_wBOMLength;
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FX_FILESIZE m_iPosition;
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RetainPtr<IFX_SeekableReadStream> m_pStream;
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};
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#endif // CORE_FXCRT_CFX_SEEKABLESTREAMPROXY_H_
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