dysize — get number of days for a given year
Synopsis
#include <time.h>
int dysize(int year);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
dysize():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
Description
The function returns 365 for a normal year and 366 for a leap year. The calculation for leap year is based on:
(year) %4 == 0 && ((year) %100 != 0 || (year) %400 == 0)
The formula is defined in the macro __isleap(year) also found in <time.h>.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
|---|---|---|
| dysize() | Thread safety | MT-Safe |
Conforming to
This function occurs in SunOS 4.x.
Notes
This is a compatibility function only. Don't use it in new programs.
See Also
Colophon
This page is part of release 5.04 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 https://www.kernel.org/doc/man-pages/.