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We recently needed to use the isnan() function and noticed that it is a.) a function and not an inline and b.) does not handle SNaN properly. I couldn't find any other C library that handles SNaN in isnan() properly either and thus I ventured to implement it. Here is the implementation if you care to update glibc. The advantage of this implementation is that it is inline and it will handle SNaN. A test is also included. -> icc -DIEEE -I. ieeeNaNTest.c -> ./a.out snan: nan qnan: nan snan == nan: PASS snan == snan: PASS snan != qnan: PASS qnan == nan: PASS qnan == qnan: PASS qnan != snan: PASS For some reason I couldn't compile this with gcc. It appears that "long long" is missing for some reason. Robert -- Robert Schweikert MAY THE SOURCE BE WITH YOU rjschwei@cox.net LINUX
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