Impala Documentation

Impala::Util::IOBufferFile::IOBufferFile	(	CString	filename,
		bool	readMode,
		bool	useMemory
	)			`[inline]`

Definition at line 30 of file IOBufferFile.h.

References FSeek(), FTell(), ILOG_ERROR, mFile, mReadMode, mUseMemory, Open(), Impala::Util::IOBuffer::SetBuffer(), and Impala::Util::IOBuffer::SetSize().

00031     {
00032         mReadMode = readMode;
00033         mUseMemory = useMemory;
00034 
00035         mFile = Open(filename, (mReadMode ? "rb" : "w+b"));
00036         if (!mFile)
00037         {
00038             ILOG_ERROR("Failed to open " << filename);
00039             return;
00040         }
00041 
00042         if (mReadMode)
00043         {
00044             FSeek(mFile, 0, SEEK_END);
00045             PositionType size = FTell(mFile);
00046             FSeek(mFile, 0, SEEK_SET);
00047             if (mUseMemory)
00048             {
00049                 unsigned char* buf = new unsigned char[size];
00050                 fread(buf, 1, size, mFile);
00051                 SetBuffer(buf, size);
00052                 fclose(mFile);
00053                 mFile = 0;
00054             }
00055             else
00056             {
00057                 SetSize(size);
00058             }
00059         }
00060     }

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