[C++] FileReader.h

FileReader.h

#ifndef AVM_FILE_READER_H
#define AVM_FILE_READER_H

#include "DemuxUtil.h"

//#define FILE_MAPPING_READER

#ifndef FILE_MAPPING_READER
class CFileReader
{
public:
	CFileReader();
	virtual ~CFileReader();

	virtual bool      Open(const WCHAR* lpFileName);
	virtual bool      Close();

	virtual DWORD     Read(LONGLONG llReadPosition, DWORD dwBytesToRead, BYTE* pBuffer);	
	virtual LONGLONG  GetFileSize() const 
	{ 
#ifdef _MAC_
		return m_llFileSize;
#else
		return m_liFileSize.QuadPart;
#endif
	}

protected:

#ifdef _MAC_
	OSStatus ConvertUTF8NameToHFSUniStr255(const char* inName, HFSUniStr255* uniStr);
	OSStatus OpenFileAndGetDataForkRef(const char* fileName, SInt8 permissions, SInt16* forkRefNum);

	SInt16 m_hFile;
	SInt64 m_llFileSize;
#else
	HANDLE m_hFile;
	LARGE_INTEGER m_liFileSize;
#endif
};

#else

class CFileReader
{
public:
	CFileReader();
	virtual ~CFileReader();

	virtual bool      Open(const WCHAR* lpFileName);
	virtual bool      Close();

	virtual DWORD     Read(LONGLONG llReadPosition, DWORD dwBytesToRead, BYTE* pBuffer);	
	virtual LONGLONG  GetFileSize() const 
	{ 
		return m_llFileSize;
	}

private:
	HANDLE m_hFileMapping;

	HANDLE m_hFile;
	LONGLONG m_llFileSize;
};

#endif

#endif//AVM_FILE_READER_H