ISINFF(3) BSD 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'', otherwise 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.
BSD
August 16, 1999 BSD
