Method GetCode

CrySystem/DataProbe.cpp:311–389

/////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////
bool CDataProbe::GetCode( SDataProbeContext &ctx )
{
	if (ctx.nSize <= 0)
		return false;

	if (ctx.pBuffer)
	{
		return GetDataCode( (char*)ctx.pBuffer,ctx.nSize,ctx );
	}

	// Try to open file and hash it.
	FILE *file = fopen( ctx.sFilename.c_str(),"rb" );
	if (file)
	{
		fseek( file,0,SEEK_END );
		unsigned int nFileSize = ftell(file);
		if (ctx.nOffset >= nFileSize)
		{
			fclose(file);
			return false;
		}
		ctx.nSize = min( ctx.nSize,nFileSize-ctx.nOffset );

		if (fseek( file,ctx.nOffset,SEEK_SET ) != 0)
		{
			fclose( file );
			return false;
		}
		char *pBuf = (char*)malloc( ctx.nSize );
		if (fread( pBuf,ctx.nSize,1,file ) != 1)
		{
			free( pBuf );
			fclose(file);
			return false;
		}
		
		// Hash readed data with choosen algorithm, store result into 64bit nCode.
		bool bOk = GetDataCode( pBuf,ctx.nSize,ctx );

		free( pBuf );
		fclose(file);

		return bOk;
	}
	else
	{
		// Real file on disk not found... so check against one in the pak.
		// Try to open file and hash it.
		CCryFile cryfile;
		if (cryfile.Open( ctx.sFilename.c_str(),"rb" ))
		{
			unsigned int nFileSize = cryfile.GetLength();
			if (ctx.nOffset >= nFileSize)
			{
				return false;
			}
			ctx.nSize = min( ctx.nSize,nFileSize-ctx.nOffset );