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package Apache::ASP::Date; |
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# This package code was taken from HTTP::Date, written by Gisle Aas |
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# Copyright 1995-1997, Gisle Aas |
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# This library is free software; you can redistribute it and/or |
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# modify it under the same terms as Perl itself. |
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use strict; |
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use vars qw($VERSION @ISA @EXPORT @EXPORT_OK); |
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require 5.002; |
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require Exporter; |
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@ISA = qw(Exporter); |
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@EXPORT = qw(time2str str2time); |
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@EXPORT_OK = qw(time2iso time2isoz); |
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use Time::Local (); |
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use strict; |
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2325
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use vars qw(@DoW @MoY %MoY); |
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73321
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#@DoW = qw(Sunday Monday Tuesday Wednesday Thursday Friday Saturday); |
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@DoW = qw(Sun Mon Tue Wed Thu Fri Sat); |
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@MoY = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec); |
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# Build %MoY hash |
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my $i = 0; |
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foreach(@MoY) { |
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$MoY{lc $_} = $i++; |
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} |
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my($current_month, $current_year) = (localtime)[4, 5]; |
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sub time2str (;$) |
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{ |
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my $time = shift; |
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$time = time unless defined $time; |
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my ($sec, $min, $hour, $mday, $mon, $year, $wday) = gmtime($time); |
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sprintf("%s, %02d %s %04d %02d:%02d:%02d GMT", |
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$DoW[$wday], |
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$mday, $MoY[$mon], $year+1900, |
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$hour, $min, $sec); |
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} |
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sub str2time ($;$) |
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{ |
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local($_) = shift; |
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return undef unless defined; |
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my($default_zone) = @_; |
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# Remove useless weekday, if it exists |
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s/^\s*(?:sun|mon|tue|wed|thu|fri|sat)\w*,?\s*//i; |
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my($day, $mon, $yr, $hr, $min, $sec, $tz, $aorp); |
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my $offset = 0; # used when compensating for timezone |
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PARSEDATE: { |
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# Then we are able to check for most of the formats with this regexp |
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($day,$mon,$yr,$hr,$min,$sec,$tz) = |
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/^\s* |
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(\d\d?) # day |
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(?:\s+|[-\/]) |
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(\w+) # month |
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(?:\s+|[-\/]) |
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(\d+) # year |
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(?: |
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(?:\s+|:) # separator before clock |
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(\d\d?):(\d\d) # hour:min |
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(?::(\d\d))? # optional seconds |
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)? # optional clock |
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\s* |
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([-+]?\d{2,4}|GMT|gmt)? # timezone |
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\s*$ |
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/x |
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and last PARSEDATE; |
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# Try the ctime and asctime format |
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($mon, $day, $hr, $min, $sec, $tz, $yr) = |
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/^\s* # allow intial whitespace |
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(\w{1,3}) # month |
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\s+ |
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(\d\d?) # day |
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\s+ |
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(\d\d?):(\d\d) # hour:min |
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(?::(\d\d))? # optional seconds |
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\s+ |
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(?:(GMT|gmt)\s+)? # optional GMT timezone |
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(\d+) # year |
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\s*$ # allow trailing whitespace |
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/x |
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and last PARSEDATE; |
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95
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# Then the Unix 'ls -l' date format |
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($mon, $day, $yr, $hr, $min, $sec) = |
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/^\s* |
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(\w{3}) # month |
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\s+ |
100
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(\d\d?) # day |
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\s+ |
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(?: |
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(\d\d\d\d) | # year |
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(\d{1,2}):(\d{2}) # hour:min |
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(?::(\d\d))? # optional seconds |
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) |
107
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\s*$ |
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/x |
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and last PARSEDATE; |
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111
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# ISO 8601 format '1996-02-29 12:00:00 -0100' and variants |
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0
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0
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($yr, $mon, $day, $hr, $min, $sec, $tz) = |
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/^\s* |
114
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(\d{4}) # year |
115
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[-\/]? |
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(\d\d?) # numerical month |
117
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[-\/]? |
118
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(\d\d?) # day |
119
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(?: |
120
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(?:\s+|:|T|-) # separator before clock |
121
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(\d\d?):?(\d\d) # hour:min |
122
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(?::?(\d\d))? # optional seconds |
123
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)? # optional clock |
124
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\s* |
125
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([-+]?\d\d?:?(:?\d\d)? |
126
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|Z|z)? # timezone (Z is "zero meridian", i.e. GMT) |
127
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\s*$ |
128
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/x |
129
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and last PARSEDATE; |
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131
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# Windows 'dir' 11-12-96 03:52PM |
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0
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0
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0
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($mon, $day, $yr, $hr, $min, $aorp) = |
133
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/^\s* |
134
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(\d{2}) # numerical month |
135
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- |
136
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(\d{2}) # day |
137
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- |
138
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(\d{2}) # year |
139
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\s+ |
140
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(\d\d?):(\d\d)([apAP][mM]) # hour:min AM or PM |
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\s*$ |
142
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/x |
143
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and last PARSEDATE; |
144
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145
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# If it is not recognized by now we give up |
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0
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0
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return undef; |
147
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} |
148
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149
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# Translate month name to number |
150
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3
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21
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if ($mon =~ /^\d+$/) { |
151
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# numeric month |
152
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0
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return undef if $mon < 1 || $mon > 12; |
153
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0
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$mon--; |
154
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} else { |
155
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3
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7
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$mon = lc $mon; |
156
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3
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50
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15
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return undef unless exists $MoY{$mon}; |
157
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3
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14
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$mon = $MoY{$mon}; |
158
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} |
159
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160
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# If the year is missing, we assume some date before the current, |
161
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# because these date are mostly present on "ls -l" listings. |
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unless (defined $yr) { |
163
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$yr = $current_year; |
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$yr-- if $mon > $current_month; |
165
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} |
166
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167
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# Then we check if the year is acceptable |
168
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33
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return undef if $yr > 99 && $yr < 1900; # We ignore these years |
169
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50
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$yr += 100 if $yr < 50; # a stupid thing to do??? |
170
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50
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13
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$yr -= 1900 if $yr >= 1900; |
171
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# The $yr is now relative to 1900 (as expected by timelocal()) |
172
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173
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# timelocal() seems to go into an infinite loop if it is given out |
174
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# of range parameters. Let's check the year at least. |
175
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176
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# Epoch counter maxes out in year 2038, assuming "time_t" is 32 bit |
177
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11
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return undef if $yr > 138; |
178
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10
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return undef if $yr < 70; # 1970 is Unix epoch |
179
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180
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# Compensate for AM/PM |
181
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3
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50
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10
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if ($aorp) { |
182
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0
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0
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$aorp = uc $aorp; |
183
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0
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0
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0
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0
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$hr = 0 if $hr == 12 && $aorp eq 'AM'; |
184
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0
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0
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0
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0
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$hr += 12 if $aorp eq 'PM' && $hr != 12; |
185
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} |
186
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187
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# Make sure things are defined |
188
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10
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for ($sec, $min, $hr) { $_ = 0 unless defined } |
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189
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190
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# Should we compensate for the timezone? |
191
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3
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10
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$tz = $default_zone unless defined $tz; |
192
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3
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50
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14
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return eval {Time::Local::timelocal($sec, $min, $hr, $day, $mon, $yr)} |
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0
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0
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193
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unless defined $tz; |
194
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195
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# We can calculate offset for numerical time zones |
196
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3
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50
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13
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if ($tz =~ /^([-+])?(\d\d?):?(\d\d)?$/) { |
197
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0
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0
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$offset = 3600 * $2; |
198
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0
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0
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0
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$offset += 60 * $3 if $3; |
199
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0
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0
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0
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0
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$offset *= -1 if $1 && $1 ne '-'; |
200
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} |
201
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3
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7
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eval{Time::Local::timegm($sec, $min, $hr, $day, $mon, $yr) + $offset}; |
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3
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19
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202
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} |
203
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204
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205
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206
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# And then some bloat because I happen to like the ISO 8601 time |
207
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# format. |
208
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209
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sub time2iso (;$) |
210
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|
|
|
{ |
211
|
0
|
|
|
0
|
0
|
|
my $time = shift; |
212
|
0
|
0
|
|
|
|
|
$time = time unless defined $time; |
213
|
0
|
|
|
|
|
|
my($sec,$min,$hour,$mday,$mon,$year) = localtime($time); |
214
|
0
|
|
|
|
|
|
sprintf("%04d-%02d-%02d %02d:%02d:%02d", |
215
|
|
|
|
|
|
|
$year+1900, $mon+1, $mday, $hour, $min, $sec); |
216
|
|
|
|
|
|
|
} |
217
|
|
|
|
|
|
|
|
218
|
|
|
|
|
|
|
|
219
|
|
|
|
|
|
|
sub time2isoz (;$) |
220
|
|
|
|
|
|
|
{ |
221
|
0
|
|
|
0
|
0
|
|
my $time = shift; |
222
|
0
|
0
|
|
|
|
|
$time = time unless defined $time; |
223
|
0
|
|
|
|
|
|
my($sec,$min,$hour,$mday,$mon,$year) = gmtime($time); |
224
|
0
|
|
|
|
|
|
sprintf("%04d-%02d-%02d %02d:%02d:%02dZ", |
225
|
|
|
|
|
|
|
$year+1900, $mon+1, $mday, $hour, $min, $sec); |
226
|
|
|
|
|
|
|
} |
227
|
|
|
|
|
|
|
|
228
|
|
|
|
|
|
|
1; |