debian man page for dysize

DYSIZE(3)						     Linux Programmer's Manual							 DYSIZE(3)

NAME
       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(): _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>.

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
       strftime(3)

COLOPHON
       This  page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2010-09-22								 DYSIZE(3)