| ISINF(3) | Library Functions Manual | ISINF(3) |
isinf —
#include <math.h>
int
isinf(real-floating
x);
isinf() macro determines whether its argument
x is an infinity (positive or negative). An argument
represented in a format wider than its semantic type is converted to its
semantic type first. The determination is then based on the type of the
argument.
isinf() macro returns a non-zero value if the value
of x is an infinity. Otherwise 0 is returned.
IEEE Standard for Binary Floating-Point Arithmetic, Std 754-1985, ANSI.
isinf() macro conforms to ISO/IEC
9899:1999 (“ISO C99”).
isinf() function always returns 0, as the
architecture doesn't have a representation for infinity.
| September 27, 2017 | NetBSD 9.4 |