1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef XFA_FGAS_CRT_FGAS_STREAM_H_ 8 #define XFA_FGAS_CRT_FGAS_STREAM_H_ 9 10 #include "core/fxcrt/cfx_retain_ptr.h" 11 #include "core/fxcrt/fx_stream.h" 12 #include "core/fxcrt/fx_system.h" 13 14 enum FX_STREAMACCESS { 15 FX_STREAMACCESS_Binary = 0x00, 16 FX_STREAMACCESS_Text = 0x01, 17 FX_STREAMACCESS_Read = 0x02, 18 FX_STREAMACCESS_Write = 0x04, 19 FX_STREAMACCESS_Truncate = 0x10, 20 FX_STREAMACCESS_Append = 0x20, 21 FX_STREAMACCESS_Create = 0x80, 22 }; 23 24 enum FX_STREAMSEEK { 25 FX_STREAMSEEK_Begin = 0, 26 FX_STREAMSEEK_Current, 27 FX_STREAMSEEK_End, 28 }; 29 30 class IFGAS_Stream : public CFX_Retainable { 31 public: 32 static CFX_RetainPtr<IFGAS_Stream> CreateStream( 33 const CFX_RetainPtr<IFX_SeekableReadStream>& pFileRead, 34 uint32_t dwAccess); 35 static CFX_RetainPtr<IFGAS_Stream> CreateStream( 36 const CFX_RetainPtr<IFX_SeekableWriteStream>& pFileWrite, 37 uint32_t dwAccess); 38 static CFX_RetainPtr<IFGAS_Stream> CreateStream(uint8_t* pData, 39 int32_t length, 40 uint32_t dwAccess); 41 static CFX_RetainPtr<IFGAS_Stream> CreateTextStream( 42 const CFX_RetainPtr<IFGAS_Stream>& pBaseStream); 43 44 virtual CFX_RetainPtr<IFGAS_Stream> CreateSharedStream(uint32_t dwAccess, 45 int32_t iOffset, 46 int32_t iLength) = 0; 47 48 virtual uint32_t GetAccessModes() const = 0; 49 virtual int32_t GetLength() const = 0; 50 virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) = 0; 51 virtual int32_t GetPosition() = 0; 52 virtual bool IsEOF() const = 0; 53 virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) = 0; 54 virtual int32_t ReadString(FX_WCHAR* pStr, 55 int32_t iMaxLength, 56 bool& bEOS) = 0; 57 virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) = 0; 58 virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength) = 0; 59 virtual void Flush() = 0; 60 virtual bool SetLength(int32_t iLength) = 0; 61 virtual int32_t GetBOM(uint8_t bom[4]) const = 0; 62 virtual uint16_t GetCodePage() const = 0; 63 virtual uint16_t SetCodePage(uint16_t wCodePage) = 0; 64 65 CFX_RetainPtr<IFX_SeekableReadStream> MakeSeekableReadStream(); 66 }; 67 68 69 #endif // XFA_FGAS_CRT_FGAS_STREAM_H_ 70