remquo(3)

NAME
remquo, remquof, remquol - remainder and part of quotient

LIBRARY
Math library (libm, -lm)

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);

    Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

remquo(), remquof(), remquol():
    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

DESCRIPTION
These functions compute the remainder and part of the quotient upon division of x by y. A few bits of the quotient are stored via the quo pointer. The remainder is returned as the function result.

The value of the remainder is the same as that computed by the remainder(3) function.

The value stored via the quo pointer has the sign of x / y and agrees with the quotient in at least the low order 3 bits.

For example, remquo(29.0, 3.0) returns -1.0 and might store 2. Note that the actual quotient might not fit in an integer.

RETURN VALUE
On success, these functions return the same value as the analogous functions described in remainder(3).

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

If x is an infinity, and y is not a NaN, a domain error occurs, and a NaN is returned.

If y is zero, and x is not a NaN, a domain error occurs, and a NaN is returned.

ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.

The following errors can occur:

Domain error: x is an infinity or y is 0, and the other argument is not a NaN
    An invalid floating-point exception (FE_INVALID) is raised.

These functions do not set errno.

ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value
 | Thread safety | MT-Safe

STANDARDS
C11, POSIX.1-2008.

HISTORY
glibc 2.1. C99, POSIX.1-2001.

SEE ALSO
fmod(3), logb(3), remainder(3)