C_FileIO.cpp
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C_FileIO.cpp
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	// Common/C_FileIO.h

	#include "C_FileIO.h"

	#include <fcntl.h>
	#include <unistd.h>

	namespace NC {
	namespace NFile {
	namespace NIO {

	bool CFileBase::OpenBinary(const char *name, int flags)
	{
	#ifdef O_BINARY
	flags \|= O_BINARY;
	#endif
	Close();
	_handle = ::open(name, flags, 0666);
	return _handle != -1;
	}

	bool CFileBase::Close()
	{
	if(_handle == -1)
	return true;
	if (close(_handle) != 0)
	return false;
	_handle = -1;
	return true;
	}

	bool CFileBase::GetLength(UInt64 &length) const
	{
	off_t curPos = Seek(0, SEEK_CUR);
	off_t lengthTemp = Seek(0, SEEK_END);
	Seek(curPos, SEEK_SET);
	length = (UInt64)lengthTemp;
	return true;
	}

	off_t CFileBase::Seek(off_t distanceToMove, int moveMethod) const
	{
	return ::lseek(_handle, distanceToMove, moveMethod);
	}

	/////////////////////////
	// CInFile

	bool CInFile::Open(const char *name)
	{
	return CFileBase::OpenBinary(name, O_RDONLY);
	}

	ssize_t CInFile::Read(void *data, size_t size)
	{
	return read(_handle, data, size);
	}

	/////////////////////////
	// COutFile

	bool COutFile::Create(const char *name, bool createAlways)
	{
	if (createAlways)
	{
	Close();
	_handle = ::creat(name, 0666);
	return _handle != -1;
	}
	return OpenBinary(name, O_CREAT \| O_EXCL \| O_WRONLY);
	}

	ssize_t COutFile::Write(const void *data, size_t size)
	{
	return write(_handle, data, size);
	}

	}}}