ISUNORDERED(3M) Mathematical Library Functions ISUNORDERED(3M)
isunordered - test if arguments are unordered
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
int isunordered(real-floating x, real-floating y);
The isunordered() macro determines whether its arguments are
unordered.
Upon successful completion, the isunordered() macro returns 1 if its
arguments are unordered and 0 otherwise.
No errors are defined.
The relational and equality operators support the usual mathematical
relationships between numeric values. For any ordered pair of numeric
values, exactly one of the relationships (less, greater, and equal)
is true. Relational operators can raise the invalid floating-point
exception when argument values are NaNs. For a NaN and a numeric
value, or for two NaNs, just the unordered relationship is true. This
macro is a quiet (non-floating-point exception raising) version of a
relational operator. It facilitates writing efficient code that
accounts for quiet NaNs without suffering the invalid floating-point
exception. In the SYNOPSIS section, real-floating indicates that the
argument shall be an expression of real-floating type.
See attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
math.h(3HEAD), isgreater(3M), isgreaterequal(3M), isless(3M),
islessequal(3M), islessgreater(3M), attributes(7), standards(7)
SunOS 5.11 July 12, 2006 ISUNORDERED(3M)
NAME
isunordered - test if arguments are unordered
SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
int isunordered(real-floating x, real-floating y);
DESCRIPTION
The isunordered() macro determines whether its arguments are
unordered.
RETURN VALUES
Upon successful completion, the isunordered() macro returns 1 if its
arguments are unordered and 0 otherwise.
ERRORS
No errors are defined.
USAGE
The relational and equality operators support the usual mathematical
relationships between numeric values. For any ordered pair of numeric
values, exactly one of the relationships (less, greater, and equal)
is true. Relational operators can raise the invalid floating-point
exception when argument values are NaNs. For a NaN and a numeric
value, or for two NaNs, just the unordered relationship is true. This
macro is a quiet (non-floating-point exception raising) version of a
relational operator. It facilitates writing efficient code that
accounts for quiet NaNs without suffering the invalid floating-point
exception. In the SYNOPSIS section, real-floating indicates that the
argument shall be an expression of real-floating type.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
SEE ALSO
math.h(3HEAD), isgreater(3M), isgreaterequal(3M), isless(3M),
islessequal(3M), islessgreater(3M), attributes(7), standards(7)
SunOS 5.11 July 12, 2006 ISUNORDERED(3M)