fdimf

(3)

positive difference

Library functionsmanpages-dev 6.9.1-1also documents fdim, fdiml

#include <math.h> double fdim(double x, double y); float fdimf(float x, float y); long double fdiml(long double x, long double y); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): fdimf(), fdiml(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

LIBRARY

Math library (libm, -lm)

DESCRIPTION

These functions return the positive difference, max(x-y,0), between their arguments.

RETURN VALUE

On success, these functions return the positive difference.

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

If the result overflows, a range error occurs, and the functions return HUGE_VAL, HUGE_VALF, or HUGE_VALL, respectively.

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:

Range error: result overflow: errno is set to ERANGE. An overflow floating-point exception (FE_OVERFLOW) is raised.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
fdim (), fdimf (), fdiml ()	Thread safety	MT-Safe

STANDARDS

C11, POSIX.1-2008.

HISTORY

glibc 2.1. C99, POSIX.1-2001.

BUGS

Before glibc 2.24 on certain architectures (e.g., x86, but not x86_64) these functions did not set errno.