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FDIM(3) - man page online | library functions

Positive difference.

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2015-04-19
FDIM(3)                             Linux Programmer's Manual                             FDIM(3)

NAME fdim, fdimf, fdiml - positive difference
SYNOPSIS #include <math.h> 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 feature_test_macros(7)): fdimf(), fdiml(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 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 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 An overflow floating-point exception (FE_OVERFLOW) 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, POSIX.1-2008.
SEE ALSO fmax(3)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.
2015-04-19 FDIM(3)
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fdim(3) referred by
refer to attributes(7) | feature_test_macros(7) | fmax(3) | math_error(7)