Go to main content

man pages section 3: Extended Library Functions, Volume 2

Exit Print View

Updated: Thursday, June 13, 2019
 
 

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

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
Availability
system/library/math
MT-Level
MT-Safe
Standard

See Also

math.h(3HEAD), feclearexcept(3M), fetestexcept(3M), remainder(3M), attributes(7), standards(7)