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.
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