isfinite man page on Minix

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ISFINITE(3)		 BSD Library Functions Manual		   ISFINITE(3)

NAME
     isfinite — test for finite value

LIBRARY
     Standard C Library (libc, -lc)

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 con‐
     verted 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
     finite.  Otherwise 0 is returned.

ERRORS
     No errors are defined.

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

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

BSD				August 6, 2011				   BSD
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