# remquof(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			   |
+-----------------------------+-----------------------------+

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

SunOS 5.10							    1 Sep 2002								remquo(3M)```

## Check Out this Related Man Page

```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.