Tribblix: manual page: remquo.3m

REMQUO(3M) Mathematical Library Functions REMQUO(3M)

NAME

remquo, remquof, remquol - remainder functions

SYNOPSIS

c99 [ 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