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September 2004
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2004.09.17 16:00 "Re: BigTIFF Tag Value Count issue", by Frank Warmerdam
Loygorri, Fernando wrote: > Just to clarify, I'm not proposing that negative 64-bit values should > have any meaning. They should be outlawed by the spec. I'm proposing > that the spec outlaw values with the most-significant bit set, and > this only to accommodate languages like Java that have a 64-bit signed > type but no 64-bit unsigned type. FGL, As a practical matter Java or other unsigned-deficient languages can just use a signed 64bit integer type. It isn't like there will in practice be any objects with an offset of more than 2^63 anyways. In fact, libtiff used a signed int for toff_t till a few years ago too. I'm sure the folks said the same thing about 32bit offsets once, but I am convinced no one will be able to track me down and make me sorry for this suggestion when it starts to matter. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent