remquo(3) — Linux manual page


remquo(3)               Library Functions Manual               remquo(3)

NAME         top

       remquo, remquof, remquol - remainder and part of quotient

LIBRARY         top

       Math library (libm, -lm)

SYNOPSIS         top

       #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

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

DESCRIPTION         top

       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

       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         top

       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         top

       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

       These functions do not set errno.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       │ Interface                           Attribute     Value   │
       │ remquo(), remquof(), remquol()      │ Thread safety │ MT-Safe │

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       glibc 2.1.  C99, POSIX.1-2001.

SEE ALSO         top

       fmod(3), logb(3), remainder(3)

Linux man-pages (unreleased)     (date)                        remquo(3)

Pages that refer to this page: fma(3)remainder(3)