NAME
fdim, fdimf, fdiml - positive difference SYNOPSIS
#include
double fdim(double x, double y); float fdimf(float x, float y); long double fdiml(long double x, long double y); Link with -lm. Feature Test Macro Requirements for glibc (see featuretestmacros(7)): fdimf(), fdiml(): XOPENSOURCE >= 600 || ISOC99SOURCE || POSIXCSOURCE >= 200112L;
or cc -std=c99 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 HUGEVAL, HUGEVALF, or HUGEVALL, respectively. ERRORS See matherror(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
An overflow floating-point exception (FEOVERFLOW) is raised. These functions do not set errno. VERSIONS These functions first appeared in glibc in version 2.1. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├─────────────────────────┼───────────────┼─────────┤
│fdim(), fdimf(), fdiml() │ Thread safety │ MT-Safe │ └─────────────────────────┴───────────────┴─────────┘ CONFORMING TO
C99, POSIX.1-2001. SEE ALSO fmax(3) COLOPHON
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2013-07-15 FDIM(3)