isinff(3) - NetBSD Manual Pages

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ISINFF(3)               NetBSD Library Functions Manual              ISINFF(3)


NAME

     isinff, isnanf -- test for infinity or not-a-number


LIBRARY

     Math Library (libm, -lm)


SYNOPSIS

     #include <math.h>

     int
     isinff(float);

     int
     isnanf(float);


DESCRIPTION

     The isinff() function returns 1 if the number is ``infinity'', otherwise
     0.

     The isnanf() function returns 1 if the number is ``not-a-number'', other-
     wise 0.


SEE ALSO

     isinf(3), isnan(3), math(3)

     IEEE Standard for Binary Floating-Point Arithmetic, Std 754-1985, ANSI.


BUGS

     Neither the VAX nor the Tahoe floating point have distinguished values
     for either infinity or not-a-number.  These routines always return 0 on
     those architectures.

NetBSD 7.0                      August 16, 1999                     NetBSD 7.0