dysize(3) Linux Man Page - System Grab Bag

Name

dysize - get number of days for a given year

Standard C library ( libc ", " -lc )

"#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

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>.

For an explanation of the terms used in this section, see attributes(7). allbox; lbx lb lb T{ dysize()

Interface	Attribute	Value
T}	Thread safety	MT-Safe

None.

SunOS 4.x.

This is a compatibility function only. Don't use it in new programs.