# +-======-+ 
#  Copyright (c) 2003-2018 United States Government as represented by 
#  the Admistrator of the National Aeronautics and Space Administration.  
#  All Rights Reserved.
#  
#  THIS OPEN  SOURCE  AGREEMENT  ("AGREEMENT") DEFINES  THE  RIGHTS  OF USE,
#  REPRODUCTION,  DISTRIBUTION,  MODIFICATION AND REDISTRIBUTION OF CERTAIN 
#  COMPUTER SOFTWARE ORIGINALLY RELEASED BY THE UNITED STATES GOVERNMENT AS 
#  REPRESENTED BY THE GOVERNMENT AGENCY LISTED BELOW ("GOVERNMENT AGENCY").  
#  THE UNITED STATES GOVERNMENT, AS REPRESENTED BY GOVERNMENT AGENCY, IS AN 
#  INTENDED  THIRD-PARTY  BENEFICIARY  OF  ALL  SUBSEQUENT DISTRIBUTIONS OR 
#  REDISTRIBUTIONS  OF THE  SUBJECT  SOFTWARE.  ANYONE WHO USES, REPRODUCES, 
#  DISTRIBUTES, MODIFIES  OR REDISTRIBUTES THE SUBJECT SOFTWARE, AS DEFINED 
#  HEREIN, OR ANY PART THEREOF,  IS,  BY THAT ACTION, ACCEPTING IN FULL THE 
#  RESPONSIBILITIES AND OBLIGATIONS CONTAINED IN THIS AGREEMENT.
#  
#  Government Agency: National Aeronautics and Space Administration
#  Government Agency Original Software Designation: GSC-15354-1
#  Government Agency Original Software Title:  GEOS-5 GCM Modeling Software
#  User Registration Requested.  Please Visit http://opensource.gsfc.nasa.gov
#  Government Agency Point of Contact for Original Software:  
#  			Dale Hithon, SRA Assistant, (301) 286-2691
#  
# +-======-+ 
package Time::DaysInMonth;

use Carp;

require 5.000;

@ISA = qw(Exporter);
@EXPORT = qw(days_in is_leap);
@EXPORT_OK = qw(%mltable);

use strict;

use vars qw($VERSION %mltable);

$VERSION = 96.032702;

CONFIG:	{
	%mltable = qw(
		 1	31
		 3	31
		 4	30
		 5	31
		 6	30
		 7	31
		 8	31
		 9	30
		10	31
		11	30
		12	31);
}

sub days_in
{
	# Month is 1..12
	my ($year, $month) = @_;
	return $mltable{$month+0} unless $month == 2;
	return 28 unless &is_leap($year);
	return 29;
}

sub is_leap
{
	my ($year) = @_;
	return 0 unless $year % 4 == 0;
	return 1 unless $year % 100 == 0;
	return 0 unless $year % 400 == 0;
	return 1;
}

1;

__DATA__

=head1 NAME

Time::DaysInMonth -- simply report the number of days in a month

=head1 SYNOPSIS

	use Time::DaysInMonth;
	$days = days_in($year, $month_1_to_12);
	$leapyear = is_leap($year);

=head1 DESCRIPTION

DaysInMonth is simply a package to report the number of days in
a month.  That's all it does.  Really!

=head1 AUTHOR

David Muir Sharnoff <muir@idiom.com>

Copyright (C) 1996-1999 David Muir Sharnoff.  All Rights Reserved.
Use and redistribution allowed at user's own risk.