# remquo(3m) [opensolaris man page]

remquo(3M) Mathematical Library Functions remquo(3M)NAME

remquo, remquof, remquol - remainder functionsSYNOPSIS

c99 [ flag... ] file...[ 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);-lmDESCRIPTION

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 | +-----------------------------+-----------------------------+SEE ALSO

feclearexcept(3M), fetestexcept(3M), math.h(3HEAD), remainder(3M), attributes(5), standards(5)SunOS 5.1112 Jul 2006 remquo(3M)

## Check Out this Related Man Page

REMQUO(P)POSIX Programmer's Manual REMQUO(P)NAME

remquo, remquof, remquol - remainder functionsSYNOPSIS

#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.SEE ALSO

feclearexcept() , fetestexcept() , remainder() , the Base Definitions volume of IEEE Std 1003.1-2001, Section 4.18, Treatment of Error Con- ditions for Mathematical Functions, <math.h>COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogyPortable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .--IEEE

/The Open Group 2003 REMQUO(P)