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FETESTEXCEPT(P) 		    POSIX Programmer's Manual			  FETESTEXCEPT(P)

NAME
       fetestexcept - test floating-point exception flags

SYNOPSIS
       #include <fenv.h>

       int fetestexcept(int excepts);

DESCRIPTION
       The  fetestexcept()  function shall determine which of a specified subset of the floating-
       point exception flags are currently set. The excepts argument specifies the floating-point
       status flags to be queried.

RETURN VALUE
       The  fetestexcept()  function  shall  return  the value of the bitwise-inclusive OR of the
       floating-point exception macros corresponding to the currently set  floating-point  excep-
       tions included in excepts.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       The following example calls function f() if an invalid exception is set, and then function
       g() if an overflow exception is set:

	      #include <fenv.h>
	      /* ... */
	      {
		  #pragma STDC FENV_ACCESS ON
		  int set_excepts;
		  feclearexcept(FE_INVALID | FE_OVERFLOW);
		  // maybe raise exceptions
		  set_excepts = fetestexcept(FE_INVALID | FE_OVERFLOW);
		  if (set_excepts & FE_INVALID) f();
		  if (set_excepts & FE_OVERFLOW) g();
		  /* ... */
	      }

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       feclearexcept() , fegetexceptflag() , feraiseexcept() , the  Base  Definitions  volume  of
       IEEE Std 1003.1-2001, <fenv.h>

COPYRIGHT
       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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				  FETESTEXCEPT(P)
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