.\" Copyright 2001 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\"
-.\" %%%LICENSE_START(VERBATIM)
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-.\" manual provided the copyright notice and this permission notice are
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-.\" manual under the conditions for verbatim copying, provided that the
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-.\" %%%LICENSE_END
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.\" aeb: some corrections
-.TH DYSIZE 3 2016-03-15 "GNU" "Linux Programmer's Manual"
+.TH DYSIZE 3 (date) "Linux man-pages (unreleased)"
.SH NAME
dysize \- get number of days for a given year
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
+.nf
.B "#include <time.h>"
.PP
.BI "int dysize(int " year );
+.fi
.PP
-.in -4n
+.RS -4
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
-.in
+.RE
.PP
.BR dysize ():
+.nf
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
+.fi
.SH DESCRIPTION
The function returns 365 for a normal year and 366 for a leap year.
The calculation for leap year is based on:
-.sp
+.PP
+.in +4n
+.EX
(year) %4 == 0 && ((year) %100 != 0 || (year) %400 == 0)
-.sp
+.EE
+.in
+.PP
The formula is defined in the macro
.I __isleap(year)
also found in
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
+.ad l
+.nh
.TS
allbox;
-lb lb lb
+lbx lb lb
l l l.
Interface Attribute Value
T{
.BR dysize ()
T} Thread safety MT-Safe
.TE
-.SH CONFORMING TO
+.hy
+.ad
+.sp 1
+.SH STANDARDS
This function occurs in SunOS 4.x.
.SH NOTES
This is a compatibility function only.