remquol(3m) [sunos man page]

remquo(3M)						  Mathematical Library Functions						remquo(3M)

NAME

       remquo, remquof, remquol - remainder functions

SYNOPSIS

       cc [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double remquo(double x, double y, int *quo);

       float remquof(float x, float y, int *quo);

       long double remquol(long double x, long double y, int *quo);

DESCRIPTION

       The  remquo(),  remquof(), and remquol() functions compute the same remainder as the remainder(), remainderf(), and remainderl() functions,
       respectively. See remainder(3M). In the object pointed to by quo, they store a value whose sign is the sign of x/y and whose  magnitude	is
       congruent modulo 2**n to the magnitude of the integral quotient of x/y, where n is an integer greater than or equal to 3.

RETURN VALUES

       These functions return x REM y.

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

       If x is +-Inf or y is 0 and the other argument is non-NaN, a domain error occurs and a NaN is returned.

ERRORS

       These functions will 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_ERREXCEPT) is non-zero, then the invalid floating-point exception is
		       raised.

USAGE

       An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before  calling	these  functions.  On  return,	if
       fetestexcept(FE_INVALID	|  FE_DIVBYZERO  |  FE_OVERFLOW  |  FE_UNDERFLOW) is non-zero, an exception has been raised. An application should
       either examine the return value or check the floating point exception flags to detect exceptions.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       feclearexcept(3M), fetestexcept(3M), math.h(3HEAD), remainder(3M), attributes(5), standards(5)

SunOS 5.10							    1 Sep 2002								remquo(3M)

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

NAME

       remquo, remquof, remquol - remainder functions

SYNOPSIS

       #include <math.h>

       double remquo(double x, double y, int *quo);
       float remquof(float x, float y, int *quo);
       long double remquol(long double x, long double y, int *quo);

DESCRIPTION

       The  remquo(), remquof(), and remquol() functions shall compute the same remainder as the remainder(), remainderf(), and remainderl() func-
       tions, respectively. In the object pointed to by quo, they store a value whose sign is the sign of x/ y and whose  magnitude  is  congruent
       modulo 2**n to the magnitude of the integral quotient of x/ y, where n is an implementation-defined integer greater than or equal to 3.

       An  application	wishing  to check for error situations should set errno to zero and call feclearexcept(FE_ALL_EXCEPT) before calling these
       functions.  On return, if errno is non-zero or fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero,  an  error
       has occurred.

RETURN VALUE

       These functions shall return x REM y.

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

       If  x is +-Inf or y is zero and the other argument is non-NaN, a domain error shall occur, and either a NaN (if supported), or an implemen-
       tation-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

       These functions are intended for implementing argument reductions which can exploit a few low-order bits of the quotient. Note that  x  may
       be so large in magnitude relative to y that an exact representation of the quotient is not practical.

FUTURE DIRECTIONS

       None.

SEE ALSO

       feclearexcept() , fetestexcept() , remainder() , the Base Definitions volume of IEEE Std 1003.1-2001, Section 4.18, Treatment of Error Con-
       ditions for Mathematical Functions, <math.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- 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 .

IEEE
/The Open Group						       2003								 REMQUO(P)