isfinite man page on MirBSD

isfinite man page on MirBSD

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ISFINITE(3)		   BSD Programmer's Manual		   ISFINITE(3)

NAME
     isfinite - test for finite value

LIBRARY
     libc

SYNOPSIS
     #include <math.h>

     int
     isfinite(real-floating x);

DESCRIPTION
     The isfinite() determines whether its argument x has a finite value. An
     argument represented in a format wider than its semantic type is convert-
     ed to its semantic type first. The determination is then based on the
     type of the argument.

  IEEE 754
     It is determined whether the value of x is zero, subnormal, or normal,
     and neither infinite nor NaN.

  VAX
     It is determined whether the value of x is true zero or finite, and nei-
     ther dirty zero nor ROP.

RETURN VALUES
     The isfinite() macro returns a non-zero value if the value of x is fin-
     ite. Otherwise 0 is returned.

ERRORS
     No errors are defined.

SEE ALSO
     fpclassify(3), isnormal(3), math(3), signbit(3)

STANDARDS
     The isfinite() macro conforms to ISO/IEC 9899:1999 ("ISO C99").

MirOS BSD #10-current	       October 29, 2003				     1

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