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// Copyright 2014 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 _FX_STREAM_IMP
#define _FX_STREAM_IMP
class CFX_StreamImp;
class CFX_FileStreamImp;
class CFX_BufferStreamImp;
class CFX_FileReadStreamImp;
class CFX_BufferReadStreamImp;
class CFX_FileWriteStreamImp;
class CFX_Stream;
class CFX_TextStream;
class CFX_FileRead;
class CFX_FileWrite;
class CFX_BufferAccImp;
class CFX_StreamImp : public CFX_ThreadLock {
public:
virtual void Release() { delete this; }
virtual FX_DWORD GetAccessModes() const { return m_dwAccess; }
virtual int32_t GetLength() const = 0;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) = 0;
virtual int32_t GetPosition() = 0;
virtual FX_BOOL IsEOF() const = 0;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) = 0;
virtual int32_t ReadString(FX_WCHAR* pStr,
int32_t iMaxLength,
FX_BOOL& bEOS) = 0;
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) = 0;
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength) = 0;
virtual void Flush() = 0;
virtual FX_BOOL SetLength(int32_t iLength) = 0;
protected:
CFX_StreamImp();
virtual ~CFX_StreamImp() {}
FX_DWORD m_dwAccess;
};
class CFX_FileStreamImp : public CFX_StreamImp {
public:
CFX_FileStreamImp();
virtual ~CFX_FileStreamImp();
FX_BOOL LoadFile(const FX_WCHAR* pszSrcFileName, FX_DWORD dwAccess);
virtual int32_t GetLength() const;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
virtual int32_t GetPosition();
virtual FX_BOOL IsEOF() const;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t ReadString(FX_WCHAR* pStr, int32_t iMaxLength, FX_BOOL& bEOS);
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength);
virtual void Flush();
virtual FX_BOOL SetLength(int32_t iLength);
protected:
FXSYS_FILE* m_hFile;
int32_t m_iLength;
};
class CFX_BufferStreamImp : public CFX_StreamImp {
public:
CFX_BufferStreamImp();
virtual ~CFX_BufferStreamImp() {}
FX_BOOL LoadBuffer(uint8_t* pData, int32_t iTotalSize, FX_DWORD dwAccess);
virtual int32_t GetLength() const;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
virtual int32_t GetPosition();
virtual FX_BOOL IsEOF() const;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t ReadString(FX_WCHAR* pStr, int32_t iMaxLength, FX_BOOL& bEOS);
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength);
virtual void Flush() {}
virtual FX_BOOL SetLength(int32_t iLength) { return FALSE; }
protected:
uint8_t* m_pData;
int32_t m_iTotalSize;
int32_t m_iPosition;
int32_t m_iLength;
};
class CFX_FileReadStreamImp : public CFX_StreamImp {
public:
CFX_FileReadStreamImp();
virtual ~CFX_FileReadStreamImp() {}
FX_BOOL LoadFileRead(IFX_FileRead* pFileRead, FX_DWORD dwAccess);
virtual int32_t GetLength() const;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
virtual int32_t GetPosition() { return m_iPosition; }
virtual FX_BOOL IsEOF() const;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t ReadString(FX_WCHAR* pStr, int32_t iMaxLength, FX_BOOL& bEOS);
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) {
return 0;
}
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength) {
return 0;
}
virtual void Flush() {}
virtual FX_BOOL SetLength(int32_t iLength) { return FALSE; }
protected:
IFX_FileRead* m_pFileRead;
int32_t m_iPosition;
int32_t m_iLength;
};
class CFX_BufferReadStreamImp : public CFX_StreamImp {
public:
CFX_BufferReadStreamImp();
~CFX_BufferReadStreamImp();
FX_BOOL LoadBufferRead(IFX_BufferRead* pBufferRead,
int32_t iFileSize,
FX_DWORD dwAccess,
FX_BOOL bReleaseBufferRead);
virtual int32_t GetLength() const;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
virtual int32_t GetPosition() { return m_iPosition; }
virtual FX_BOOL IsEOF() const;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t ReadString(FX_WCHAR* pStr, int32_t iMaxLength, FX_BOOL& bEOS);
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) {
return 0;
}
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength) {
return 0;
}
virtual void Flush() {}
virtual FX_BOOL SetLength(int32_t iLength) { return FALSE; }
private:
IFX_BufferRead* m_pBufferRead;
FX_BOOL m_bReleaseBufferRead;
int32_t m_iPosition;
int32_t m_iBufferSize;
};
class CFX_FileWriteStreamImp : public CFX_StreamImp {
public:
CFX_FileWriteStreamImp();
virtual ~CFX_FileWriteStreamImp() {}
FX_BOOL LoadFileWrite(IFX_FileWrite* pFileWrite, FX_DWORD dwAccess);
virtual int32_t GetLength() const;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
virtual int32_t GetPosition() { return m_iPosition; }
virtual FX_BOOL IsEOF() const;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) { return 0; }
virtual int32_t ReadString(FX_WCHAR* pStr,
int32_t iMaxLength,
FX_BOOL& bEOS) {
return 0;
}
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength);
virtual void Flush();
virtual FX_BOOL SetLength(int32_t iLength) { return FALSE; }
protected:
IFX_FileWrite* m_pFileWrite;
int32_t m_iPosition;
};
enum FX_STREAMTYPE {
FX_SREAMTYPE_Unknown = 0,
FX_STREAMTYPE_File,
FX_STREAMTYPE_Buffer,
FX_STREAMTYPE_Stream,
FX_STREAMTYPE_BufferRead,
};
class CFX_Stream : public IFX_Stream, public CFX_ThreadLock {
public:
CFX_Stream();
~CFX_Stream();
FX_BOOL LoadFile(const FX_WCHAR* pszSrcFileName, FX_DWORD dwAccess);
FX_BOOL LoadBuffer(uint8_t* pData, int32_t iTotalSize, FX_DWORD dwAccess);
FX_BOOL LoadFileRead(IFX_FileRead* pFileRead, FX_DWORD dwAccess);
FX_BOOL LoadFileWrite(IFX_FileWrite* pFileWrite, FX_DWORD dwAccess);
FX_BOOL LoadBufferRead(IFX_BufferRead* pBufferRead,
int32_t iFileSize,
FX_DWORD dwAccess,
FX_BOOL bReleaseBufferRead);
virtual void Release();
virtual IFX_Stream* Retain();
virtual FX_DWORD GetAccessModes() const { return m_dwAccess; }
virtual int32_t GetLength() const;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
virtual int32_t GetPosition();
virtual FX_BOOL IsEOF() const;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t ReadString(FX_WCHAR* pStr,
int32_t iMaxLength,
FX_BOOL& bEOS,
int32_t const* pByteSize = NULL);
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength);
virtual void Flush();
virtual FX_BOOL SetLength(int32_t iLength);
virtual int32_t GetBOM(uint8_t bom[4]) const;
virtual FX_WORD GetCodePage() const;
virtual FX_WORD SetCodePage(FX_WORD wCodePage);
virtual void Lock() { CFX_ThreadLock::Lock(); }
virtual void Unlock() { CFX_ThreadLock::Unlock(); }
virtual IFX_Stream* CreateSharedStream(FX_DWORD dwAccess,
int32_t iOffset,
int32_t iLength);
protected:
FX_STREAMTYPE m_eStreamType;
CFX_StreamImp* m_pStreamImp;
FX_DWORD m_dwAccess;
int32_t m_iTotalSize;
int32_t m_iPosition;
int32_t m_iStart;
int32_t m_iLength;
int32_t m_iRefCount;
};
class CFX_TextStream : public IFX_Stream, public CFX_ThreadLock {
public:
CFX_TextStream(IFX_Stream* pStream, FX_BOOL bDelStream);
~CFX_TextStream();
virtual void Release();
virtual IFX_Stream* Retain();
virtual FX_DWORD GetAccessModes() const;
virtual int32_t GetLength() const;
virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
virtual int32_t GetPosition();
virtual FX_BOOL IsEOF() const;
virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t ReadString(FX_WCHAR* pStr,
int32_t iMaxLength,
FX_BOOL& bEOS,
int32_t const* pByteSize = NULL);
virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize);
virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength);
virtual void Flush();
virtual FX_BOOL SetLength(int32_t iLength);
virtual int32_t GetBOM(uint8_t bom[4]) const;
virtual FX_WORD GetCodePage() const;
virtual FX_WORD SetCodePage(FX_WORD wCodePage);
virtual void Lock() { CFX_ThreadLock::Lock(); }
virtual void Unlock() { CFX_ThreadLock::Unlock(); }
virtual IFX_Stream* CreateSharedStream(FX_DWORD dwAccess,
int32_t iOffset,
int32_t iLength);
protected:
FX_WORD m_wCodePage;
FX_WORD m_wBOMLength;
FX_DWORD m_dwBOM;
uint8_t* m_pBuf;
int32_t m_iBufSize;
FX_BOOL m_bDelStream;
IFX_Stream* m_pStreamImp;
int32_t m_iRefCount;
void InitStream();
};
#ifdef FX_FILESIZE
class CFGAS_FileRead : public IFX_FileRead {
public:
CFGAS_FileRead(IFX_Stream* pStream, FX_BOOL bReleaseStream);
virtual ~CFGAS_FileRead();
virtual void Release() { delete this; }
virtual FX_FILESIZE GetSize();
virtual FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size);
protected:
FX_BOOL m_bReleaseStream;
IFX_Stream* m_pStream;
};
#else
class CFGAS_FileRead : public IFX_FileRead {
public:
CFGAS_FileRead(IFX_Stream* pStream, FX_BOOL bReleaseStream);
virtual ~CFGAS_FileRead();
virtual void Release() { delete this; }
virtual FX_DWORD GetSize();
virtual FX_BOOL ReadBlock(void* buffer, FX_DWORD offset, FX_DWORD size);
protected:
FX_BOOL m_bReleaseStream;
IFX_Stream* m_pStream;
};
#endif
#ifdef FX_FILESIZE
class CFX_BufferAccImp : public IFX_FileRead {
public:
CFX_BufferAccImp(IFX_BufferRead* pBufferRead,
FX_FILESIZE iFileSize,
FX_BOOL bReleaseStream);
virtual ~CFX_BufferAccImp();
virtual void Release() { delete this; }
virtual FX_FILESIZE GetSize();
virtual FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size);
protected:
IFX_BufferRead* m_pBufferRead;
FX_BOOL m_bReleaseStream;
FX_FILESIZE m_iBufSize;
};
#else
class CFX_BufferAccImp : public IFX_FileRead {
public:
CFX_BufferAccImp(IFX_BufferRead* pBufferRead,
int32_t iFileSize,
FX_BOOL bReleaseStream);
virtual ~CFX_BufferAccImp();
virtual void Release() { delete this; }
virtual FX_DWORD GetSize();
virtual FX_BOOL ReadBlock(void* buffer, FX_DWORD offset, FX_DWORD size);
protected:
IFX_BufferRead* m_pBufferRead;
FX_BOOL m_bReleaseStream;
int32_t m_iBufSize;
};
#endif
#ifdef FX_FILESIZE
class CFGAS_FileWrite : public IFX_FileWrite {
public:
CFGAS_FileWrite(IFX_Stream* pStream, FX_BOOL bReleaseStream);
virtual ~CFGAS_FileWrite();
virtual void Release() { delete this; }
virtual FX_FILESIZE GetSize();
virtual FX_BOOL Flush();
virtual FX_BOOL WriteBlock(const void* pData, size_t size);
virtual FX_BOOL WriteBlock(const void* pData,
FX_FILESIZE offset,
size_t size);
protected:
IFX_Stream* m_pStream;
FX_BOOL m_bReleaseStream;
};
#else
class CFGAS_FileWrite : public IFX_FileWrite {
public:
CFGAS_FileWrite(IFX_Stream* pStream, FX_BOOL bReleaseStream);
virtual ~CFGAS_FileWrite();
virtual void Release() { delete this; }
virtual FX_DWORD GetSize();
virtual FX_DWORD Flush();
virtual FX_BOOL WriteBlock(const void* pData, FX_DWORD size);
virtual FX_BOOL WriteBlock(const void* pData, FX_DWORD offset, FX_DWORD size);
protected:
IFX_Stream* m_pStream;
FX_BOOL m_bReleaseStream;
};
#endif
#endif
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