fdiml3
Positive difference
Part of fdim(3).
Usage
#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)
Overview
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 |
Releases
12 releases since Debian 3.1 (Sarge); the text changed 11 times.