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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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FEGETEXCEPTFLAG(3P) POSIX Programmer's Manual FEGETEXCEPTFLAG(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.
fegetexceptflag, fesetexceptflag — get and set floating-point
status flags
#include <fenv.h>
int fegetexceptflag(fexcept_t *flagp, int excepts);
int fesetexceptflag(const fexcept_t *flagp, int excepts);
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 fegetexceptflag() function shall attempt to store an
implementation-defined representation of the states of the
floating-point status flags indicated by the argument excepts in
the object pointed to by the argument flagp.
The fesetexceptflag() function shall attempt to set the floating-
point status flags indicated by the argument excepts to the states
stored in the object pointed to by flagp. The value pointed to by
flagp shall have been set by a previous call to fegetexceptflag()
whose second argument represented at least those floating-point
exceptions represented by the argument excepts. This function
does not raise floating-point exceptions, but only sets the state
of the flags.
If the representation was successfully stored, fegetexceptflag()
shall return zero. Otherwise, it shall return a non-zero value. If
the excepts argument is zero or if all the specified exceptions
were successfully set, fesetexceptflag() shall return zero.
Otherwise, it shall return a non-zero value.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
feclearexcept(3p), feraiseexcept(3p), fetestexcept(3p)
The Base Definitions volume of POSIX.1‐2017, fenv.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 FEGETEXCEPTFLAG(3P)
Pages that refer to this page: fenv.h(0p), feclearexcept(3p), feraiseexcept(3p), fesetexceptflag(3p), fetestexcept(3p)
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HTML rendering created 2025-02-02 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. |
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