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302d38aa |
1 | package Time::Seconds; |
2 | use strict; |
3 | use vars qw/@EXPORT @ISA/; |
4 | |
5 | @ISA = 'Exporter'; |
6 | |
7 | @EXPORT = qw( |
8 | ONE_MINUTE |
9 | ONE_HOUR |
10 | ONE_DAY |
11 | ONE_WEEK |
12 | ONE_MONTH |
13 | ONE_YEAR |
14 | ONE_FINANCIAL_MONTH |
15 | LEAP_YEAR |
16 | NON_LEAP_YEAR |
17 | ); |
18 | |
19 | use constant ONE_MINUTE => 60; |
20 | use constant ONE_HOUR => 3_600; |
21 | use constant ONE_DAY => 86_400; |
22 | use constant ONE_WEEK => 604_800; |
23 | use constant ONE_MONTH => 2_629_744; # ONE_YEAR / 12 |
24 | use constant ONE_YEAR => 31_556_930; # 365.24225 days |
25 | use constant ONE_FINANCIAL_MONTH => 2_592_000; # 30 days |
26 | use constant LEAP_YEAR => 31_622_400; # 366 * ONE_DAY |
27 | use constant NON_LEAP_YEAR => 31_536_000; # 365 * ONE_DAY |
28 | |
29 | use overload |
30 | '0+' => \&seconds, |
31 | '""' => \&seconds, |
32 | '<=>' => \&compare, |
33 | '+' => \&add, |
34 | '-' => \&subtract, |
35 | '-=' => \&subtract_from, |
36 | '+=' => \&add_to, |
37 | '=' => \© |
38 | |
39 | sub new { |
40 | my $class = shift; |
41 | my ($val) = @_; |
42 | $val = 0 unless defined $val; |
43 | bless \$val, $class; |
44 | } |
45 | |
46 | sub _get_ovlvals { |
47 | my ($lhs, $rhs, $reverse) = @_; |
48 | $lhs = $lhs->seconds; |
49 | |
50 | if (UNIVERSAL::isa($rhs, 'Time::Seconds')) { |
51 | $rhs = $rhs->seconds; |
52 | } |
53 | elsif (ref($rhs)) { |
54 | die "Can't use non Seconds object in operator overload"; |
55 | } |
56 | |
57 | if ($reverse) { |
58 | return $rhs, $lhs; |
59 | } |
60 | |
61 | return $lhs, $rhs; |
62 | } |
63 | |
64 | sub compare { |
65 | my ($lhs, $rhs) = _get_ovlvals(@_); |
66 | return $lhs <=> $rhs; |
67 | } |
68 | |
69 | sub add { |
70 | my ($lhs, $rhs) = _get_ovlvals(@_); |
71 | return Time::Seconds->new($lhs + $rhs); |
72 | } |
73 | |
74 | sub add_to { |
75 | my $lhs = shift; |
76 | my $rhs = shift; |
77 | $rhs = $rhs->seconds if UNIVERSAL::isa($rhs, 'Time::Seconds'); |
78 | $$lhs += $rhs; |
79 | return $lhs; |
80 | } |
81 | |
82 | sub subtract { |
83 | my ($lhs, $rhs) = _get_ovlvals(@_); |
84 | return Time::Seconds->new($lhs - $rhs); |
85 | } |
86 | |
87 | sub subtract_from { |
88 | my $lhs = shift; |
89 | my $rhs = shift; |
90 | $rhs = $rhs->seconds if UNIVERSAL::isa($rhs, 'Time::Seconds'); |
91 | $$lhs -= $rhs; |
92 | return $lhs; |
93 | } |
94 | |
95 | sub copy { |
96 | Time::Seconds->new(${$_[0]}); |
97 | } |
98 | |
99 | sub seconds { |
100 | my $s = shift; |
101 | $$s; |
102 | } |
103 | |
104 | sub minutes { |
105 | my $s = shift; |
106 | $$s / 60; |
107 | } |
108 | |
109 | sub hours { |
110 | my $s = shift; |
111 | $s->minutes / 60; |
112 | } |
113 | |
114 | sub days { |
115 | my $s = shift; |
116 | $s->hours / 24; |
117 | } |
118 | |
119 | sub weeks { |
120 | my $s = shift; |
121 | $s->days / 7; |
122 | } |
123 | |
124 | sub months { |
125 | my $s = shift; |
126 | $s->days / 30.4368541; |
127 | } |
128 | |
129 | sub financial_months { |
130 | my $s = shift; |
131 | $s->days / 30; |
132 | } |
133 | |
134 | *f_months = \&financial_months; |
135 | |
136 | sub years { |
137 | my $s = shift; |
138 | $s->days / 365.24225; |
139 | } |
140 | |
141 | 1; |
142 | __END__ |
143 | |
144 | =head1 NAME |
145 | |
146 | Time::Seconds - a simple API to convert seconds to other date values |
147 | |
148 | =head1 SYNOPSIS |
149 | |
150 | use Time::Piece; |
151 | use Time::Seconds; |
152 | |
153 | my $t = localtime; |
154 | $t += ONE_DAY; |
155 | |
156 | my $t2 = localtime; |
157 | my $s = $t - $t2; |
158 | |
159 | print "Difference is: ", $s->days, "\n"; |
160 | |
161 | =head1 DESCRIPTION |
162 | |
163 | This module is part of the Time::Piece distribution. It allows the user |
164 | to find out the number of minutes, hours, days, weeks or years in a given |
165 | number of seconds. It is returned by Time::Piece when you delta two |
166 | Time::Piece objects. |
167 | |
168 | Time::Seconds also exports the following constants: |
169 | |
170 | ONE_DAY |
171 | ONE_WEEK |
172 | ONE_HOUR |
173 | ONE_MINUTE |
174 | ONE_MONTH |
175 | ONE_YEAR |
176 | ONE_FINANCIAL_MONTH |
177 | LEAP_YEAR |
178 | NON_LEAP_YEAR |
179 | |
180 | Since perl does not (yet?) support constant objects, these constants |
181 | are in seconds only, so you cannot, for example, do this: C<print |
182 | ONE_WEEK-E<gt>minutes;> |
183 | |
184 | =head1 METHODS |
185 | |
186 | The following methods are available: |
187 | |
188 | my $val = Time::Seconds->new(SECONDS) |
189 | $val->seconds; |
190 | $val->minutes; |
191 | $val->hours; |
192 | $val->days; |
193 | $val->weeks; |
194 | $val->months; |
195 | $val->financial_months; # 30 days |
196 | $val->years; |
197 | |
198 | The methods make the assumption that there are 24 hours in a day, 7 days in |
199 | a week, 365.24225 days in a year and 12 months in a year. |
200 | (from The Calendar FAQ at http://www.tondering.dk/claus/calendar.html) |
201 | |
202 | =head1 AUTHOR |
203 | |
204 | Matt Sergeant, matt@sergeant.org |
205 | |
206 | Tobias Brox, tobiasb@tobiasb.funcom.com |
207 | |
208 | =head1 LICENSE |
209 | |
210 | Please see Time::Piece for the license. |
211 | |
212 | =head1 Bugs |
213 | |
214 | Currently the methods aren't as efficient as they could be, for reasons of |
215 | clarity. This is probably a bad idea. |
216 | |
217 | =cut |