|
HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|
|
PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
|
|
|
ISLESSEQUAL(3P) POSIX Programmer's Manual ISLESSEQUAL(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
islessequal — test if x is less than or equal to y
#include <math.h>
int islessequal(real-floating x, real-floating y);
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The islessequal() macro shall determine whether its first
argument is less than or equal to its second argument. The value
of islessequal(x, y) shall be equal to (x) <= (y); however,
unlike (x) <= (y), islessequal(x, y) shall not raise the invalid
floating-point exception when x and y are unordered.
Upon successful completion, the islessequal() macro shall return
the value of (x) <= (y).
If x or y is NaN, 0 shall be returned.
No errors are defined.
The following sections are informative.
None.
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 may
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
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.
None.
None.
isgreater(3p), isgreaterequal(3p), isless(3p), islessgreater(3p),
isunordered(3p)
The Base Definitions volume of POSIX.1‐2017, math.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any
discrepancy between this version and the original IEEE and The
Open Group Standard, the original IEEE and The Open Group
Standard is the referee document. The original Standard can be
obtained online at http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 ISLESSEQUAL(3P)
Pages that refer to this page: math.h(0p), isgreater(3p), isgreaterequal(3p), isless(3p), islessgreater(3p), isunordered(3p)
|
HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|