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Linux 2.6 - man page for remainderl (linux section 3posix)

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

NAME
       remainder, remainderf, remainderl - remainder function

SYNOPSIS
       #include <math.h>

       double remainder(double x, double y);
       float remainderf(float x, float y);
       long double remainderl(long double x, long double y);

DESCRIPTION
       These functions shall return the floating-point remainder r= x- ny when y is non-zero. The
       value n is the integral value nearest the exact value x/ y.  When |n-x/y|=0.5, the value n
       is chosen to be even.

       The behavior of remainder() shall be independent of the rounding mode.

RETURN VALUE
       Upon  successful  completion, these functions shall return the floating-point remainder r=
       x- ny when y is non-zero.

       If x or y is NaN, a NaN shall be returned.

       If x is infinite or y is 0 and the other is non-NaN,  a	domain	error  shall  occur,  and
       either a NaN (if supported), or an implementation-defined value shall be returned.

ERRORS
       These functions shall fail if:

       Domain Error
	      The  x  argument	is +-Inf, or the y argument is +-0 and the other argument is non-
	      NaN.

       If the integer expression (math_errhandling & MATH_ERRNO) is non-zero, then errno shall be
       set  to [EDOM]. If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero,
       then the invalid floating-point exception shall be raised.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       On  error,  the	expressions  (math_errhandling	&  MATH_ERRNO)	and  (math_errhandling	&
       MATH_ERREXCEPT) are independent of each other, but at least one of them must be non-zero.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       abs() , div() , feclearexcept() , fetestexcept() , ldiv() , the Base Definitions volume of
       IEEE Std 1003.1-2001, Section 4.18, Treatment of Error Conditions for  Mathematical  Func-
       tions, <math.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				     REMAINDER(P)


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