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The 64 bit versions are specifically for reading files over 4GB. Using the standard 32 bit C APIs, you can not open a 4GB+ file. In 'C' you need to specify 'SYSIFCOPT(*IFS64IO)' on the create command to get the 64 bit APIs. (*IFSIO gets you the 'standard' 32 bit APIs.) > The APIs are prototype don the rpgiv.com website. > http://www.rpgiv.com/downloads/ > > The directly link to the page you want is: > http://www.rpgiv.com/cgi-rpg/viewsrc?FILE=QCPYSRC&LIB=RPGLAB&MBR=IFSPROT OS > > Read and Write use either "handle" to read the data. You have, what about > a > 2GB "limit" on the data you read at once, but that doesn't mean you can't > read multiple times to get all the data. > Scott K. would know this stuff best, but I don't think it matters which > open() or open64() you use when reading the file. I always use open64() > since it is actually 'faster' according to IBMers.
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