Originální popis anglicky:
feraiseexcept - raise floating-point exception
Návod, kniha: POSIX Programmer's Manual
#include <fenv.h>
int feraiseexcept(int
excepts);
The
feraiseexcept() function shall attempt to raise the supported
floating-point exceptions represented by the argument
excepts. The
order in which these floating-point exceptions are raised is unspecified.
Whether the
feraiseexcept() function additionally raises the inexact
floating-point exception whenever it raises the overflow or underflow
floating-point exception is implementation-defined.
If the argument is zero or if all the specified exceptions were successfully
raised,
feraiseexcept() shall return zero. Otherwise, it shall return a
non-zero value.
No errors are defined.
The following sections are informative.
None.
The effect is intended to be similar to that of floating-point exceptions raised
by arithmetic operations. Hence, enabled traps for floating-point exceptions
raised by this function are taken.
Raising overflow or underflow is allowed to also raise inexact because on some
architectures the only practical way to raise an exception is to execute an
instruction that has the exception as a side effect. The function is not
restricted to accept only valid coincident expressions for atomic operations,
so the function can be used to raise exceptions accrued over several
operations.
None.
feclearexcept() ,
fegetexceptflag() ,
fesetexceptflag() ,
fetestexcept() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<fenv.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 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
.
