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():
           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 at-
       tributes(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
       strftime(3)

COLOPHON
       This page is part of release 5.05 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/.

GNU                               2016-03-15                         DYSIZE(3)