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#!/usr/bin/env perl |
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package Date::Parse::Modern; |
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use strict; |
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use warnings; |
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use v5.10; |
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use Carp; |
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use Time::Local 1.26; |
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use Exporter 'import'; |
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our @EXPORT = ('strtotime'); |
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############################################################################### |
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# https://pause.perl.org/pause/query?ACTION=pause_operating_model#3_5_factors_considering_in_the_indexing_phase |
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our $VERSION = 0.4; |
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# https://timezonedb.com/download |
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my $TZ_OFFSET = { |
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'ACDT' => 10, 'ACST' => 9, 'ACT' => -5, 'ACWST' => 8, 'ADT' => -3, 'AEDT' => 11, 'AEST' => 10, 'AFT' => 4, |
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'AKDT' => -8, 'AKST' => -9, 'ALMT' => 6, 'AMST' => 5, 'AMT' => 4, 'ANAST' => 12, 'ANAT' => 12, 'AQTT' => 5, |
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'ART' => -3, 'AST' => -4, 'AWDT' => 9, 'AWST' => 8, 'AZOST' => 0, 'AZOT' => -1, 'AZST' => 5, 'AZT' => 4, |
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'AoE' => -12, 'BNT' => 8, 'BOT' => -4, 'BRST' => -2, 'BRT' => -3, 'BST' => 1, 'BTT' => 6, 'CAST' => 8, |
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'CAT' => 2, 'CCT' => 6, 'CDT' => -5, 'CEST' => 2, 'CET' => 1, 'CHADT' => 13, 'CHAST' => 12, 'CHOST' => 9, |
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'CHOT' => 8, 'CHUT' => 10, 'CIDST' => -4, 'CIST' => -5, 'CKT' => -10, 'CLST' => -3, 'CLT' => -4, 'COT' => -5, |
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'CST' => -6, 'CVT' => -1, 'CXT' => 7, 'ChST' => 10, 'DAVT' => 7, 'DDUT' => 10, 'EASST' => -5, 'EAST' => -6, |
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'EAT' => 3, 'ECT' => -5, 'EDT' => -4, 'EEST' => 3, 'EET' => 2, 'EGST' => 0, 'EGT' => -1, 'EST' => -5, |
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'FET' => 3, 'FJST' => 13, 'FJT' => 12, 'FKST' => -3, 'FKT' => -4, 'FNT' => -2, 'GALT' => -6, 'GAMT' => -9, |
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'GET' => 4, 'GFT' => -3, 'GILT' => 12, 'GMT' => 0, 'GST' => -2, 'GYT' => -4, 'HDT' => -9, 'HKT' => 8, |
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'HOVST' => 8, 'HOVT' => 7, 'HST' => -10, 'ICT' => 7, 'IDT' => 3, 'IOT' => 6, 'IRDT' => 4, 'IRKST' => 9, |
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'IRKT' => 8, 'IRST' => 3, 'IST' => 2, 'JST' => 9, 'KGT' => 6, 'KOST' => 11, 'KRAST' => 8, 'KRAT' => 7, |
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'KST' => 9, 'KUYT' => 4, 'LHDT' => 11, 'LHST' => 10, 'LINT' => 14, 'MAGST' => 12, 'MAGT' => 11, 'MART' => -9, |
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'MAWT' => 5, 'MDT' => -6, 'MHT' => 12, 'MMT' => 6, 'MSD' => 4, 'MSK' => 3, 'MST' => -7, 'MUT' => 4, |
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'MVT' => 5, 'MYT' => 8, 'NCT' => 11, 'NDT' => -2, 'NFDT' => 12, 'NFT' => 11, 'NOVST' => 7, 'NOVT' => 7, |
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'NPT' => 5, 'NRT' => 12, 'NST' => -3, 'NUT' => -11, 'NZDT' => 13, 'NZST' => 12, 'OMSST' => 7, 'OMST' => 6, |
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'ORAT' => 5, 'PDT' => -7, 'PET' => -5, 'PETST' => 12, 'PETT' => 12, 'PGT' => 10, 'PHOT' => 13, 'PHT' => 8, |
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'PKT' => 5, 'PMDT' => -2, 'PMST' => -3, 'PONT' => 11, 'PST' => -8, 'PWT' => 9, 'PYST' => -3, 'PYT' => 8, |
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'QYZT' => 6, 'RET' => 4, 'ROTT' => -3, 'SAKT' => 11, 'SAMT' => 4, 'SAST' => 2, 'SBT' => 11, 'SCT' => 4, |
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'SGT' => 8, 'SRET' => 11, 'SRT' => -3, 'SST' => -11, 'SYOT' => 3, 'TAHT' => -10, 'TFT' => 5, 'TJT' => 5, |
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'TKT' => 13, 'TLT' => 9, 'TMT' => 5, 'TOST' => 14, 'TOT' => 13, 'TRT' => 3, 'TVT' => 12, 'ULAST' => 9, |
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'ULAT' => 8, 'UYST' => -2, 'UYT' => -3, 'UZT' => 5, 'VET' => -4, 'VLAST' => 11, 'VLAT' => 10, 'VOST' => 6, |
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'VUT' => 11, 'WAKT' => 12, 'WARST' => -3, 'WAST' => 2, 'WAT' => 1, 'WEST' => 1, 'WET' => 0, 'WFT' => 12, |
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'WGST' => -2, 'WGT' => -3, 'WIB' => 7, 'WIT' => 9, 'WITA' => 8, 'WST' => 1, 'YAKST' => 10, 'YAKT' => 9, |
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'YAPT' => 10, 'YEKST' => 6, 'YEKT' => 5, 'Z' => 0, |
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}; |
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# Separator between dates pieces: '-' or '/' or '\' |
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my $sep = qr/[\/\\-]/; |
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# Force a local timezone offset (used for unit tests) |
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our $LOCAL_TZ_OFFSET = undef; |
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# Use caching for repeated lookups for the same TZ offset |
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our $USE_TZ_CACHE = 1; |
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# These are undocumented package variables. They could be changed to support |
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# alternate languages but there are caveats. These are cached and changing |
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# them after strtotime() is called won't affect anything. No one has requested |
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# alternate languages, so I'm leaving this undocumented for now. |
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our $MONTH_MAP = { |
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'jan' => 1, 'feb' => 2, 'mar' => 3, 'apr' => 4 , 'may' => 5 , 'jun' => 6 , |
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'jul' => 7, 'aug' => 8, 'sep' => 9, 'oct' => 10, 'nov' => 11, 'dec' => 12, |
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}; |
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# See above |
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our $MONTH_REGEXP = qr/ |
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Jan|January|Feb|February|Mar|March|Apr|April|May|Jun|June| |
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Jul|July|Aug|August|Sep|September|Oct|October|Nov|November|Dec|December |
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/ix; |
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############################################################################### |
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############################################################################### |
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############################################################################### |
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=head1 NAME |
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C - Provide string to unixtime conversions |
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=head1 DESCRIPTION |
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C provides a single function C which takes a datetime string |
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and returns a unixtime. Care was given to support the most modern style strings that you would |
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commonly find in log files or on the internet. |
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=head1 USAGE |
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use Date::Parse::Modern; |
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C exports the C function automatically. |
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=head1 FUNCTIONS |
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=head2 strtotime($string) |
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my $unixtime = strtotime('1979-02-24'); # 288691200 |
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Simply feed C a string with some type of date or time in it, and it will return an |
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integer unixtime. If the string is unparseable, or a weird error occurs, it will return C. |
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All the "magic" in C is done using regular expressions that look for common datetime |
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formats. Common formats like YYYY-MM-DD and HH:II:SS are easily detected and converted to the |
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appropriate formats. This allows the date or time to be found anywhere in the string, in (almost) any |
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order. In all cases, the day of the week is ignored in the input string. |
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B Strings without a year are assumed to be in the current year. Example: C |
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B Strings with only a date are assumed to occur at the midnight. Example: C<2023-01-15> |
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B Strings with only time are assumed to be the current day. Example: C<10:15am> |
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B In strings with numeric B textual time zone offsets, the numeric is used. Example: |
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C<14 Nov 1994 11:34:32 -0500 (EST)> |
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=head1 Bugs/Features |
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Please submit bugs and feature requests on Github: |
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https://github.com/scottchiefbaker/perl-Date-Parse-Modern |
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=head1 AUTHORS |
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Scott Baker - https://www.perturb.org/ |
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=cut |
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############################################################################### |
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############################################################################### |
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############################################################################### |
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# The logic here is that we use regular expressions to pull out various patterns |
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# YYYY/MM/DD, H:I:S, DD MonthWord YYYY |
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sub strtotime { |
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my ($str, $debug) = @_; |
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if (!defined($str)) { |
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return undef; |
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} |
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my ($year, $month, $day) = (0, 0, 0); |
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my ($hour, $min , $sec, $ms) = (0, 0, 0, 0); |
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########################################################################### |
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########################################################################### |
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state $rule_1 = qr/ |
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\b |
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((\d{4})$sep(\d{2})$sep(\d{2}) # YYYY-MM-DD |
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(\d{2})$sep(\d{2})$sep(\d{4})) # DD-MM-YYYY |
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/x; |
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# First we look to see if we have anything that mathches YYYY-MM-DD (numerically) |
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if ($str =~ $rule_1) { |
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# YYYY-MM-DD: 1999-12-24 |
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if ($2 || $3) { |
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$year = $2; |
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$month = $3; |
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$day = $4; |
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} |
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# DD-MM-YYYY: 12-24-1999 |
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if ($5 || $6) { |
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$day = $5; |
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$month = $6; |
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$year = $7; |
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# It might be American format (MM-DD-YYYY) so we do a quick flip/flop |
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if ($month > 12) { |
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($day, $month) = ($month, $day); |
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} |
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} |
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} |
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# The year may be on the end of the string: Sat May 8 21:24:31 2021 |
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if (!$year) { |
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($year) = $str =~ m/\s(\d{4})\b/; |
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} |
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########################################################################### |
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state $rule_2 = qr/ |
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(\d{1,2})? # Maybe some digits before month |
184
|
|
|
|
|
|
|
\s* |
185
|
|
|
|
|
|
|
($MONTH_REGEXP) # A textual month |
186
|
|
|
|
|
|
|
\s+ |
187
|
|
|
|
|
|
|
(\d{1,4}) # Digits |
188
|
|
|
|
|
|
|
[\s\$] # Whitespace OR end of line |
189
|
|
|
|
|
|
|
((\d{4}) )? # If there are digits ater the space it's 'Jan 13 2000' |
190
|
|
|
|
|
|
|
/x; |
191
|
|
|
|
|
|
|
|
192
|
|
|
|
|
|
|
# Next we look for alpha months followed by a digit if we didn't find a numeric month above |
193
|
|
|
|
|
|
|
# This will find: "April 13" and also "13 April 1995" |
194
|
37
|
100
|
100
|
|
|
269
|
if (!$month && $str =~ $rule_2) { |
195
|
|
|
|
|
|
|
|
196
|
|
|
|
|
|
|
# Get the numerical number for this month |
197
|
13
|
|
|
|
|
47
|
my $month_name = lc(substr($2,0,3)); |
198
|
13
|
|
|
|
|
25
|
$month = $MONTH_MAP->{$month_name}; |
199
|
|
|
|
|
|
|
|
200
|
|
|
|
|
|
|
# 17 March 94 |
201
|
13
|
100
|
|
|
|
31
|
if ($1) { |
202
|
4
|
|
|
|
|
9
|
$day = int($1); |
203
|
4
|
|
|
|
|
8
|
$year = int($3); |
204
|
|
|
|
|
|
|
# April 13 or April 13 94 |
205
|
|
|
|
|
|
|
} else { |
206
|
9
|
|
|
|
|
23
|
$day = int($3); |
207
|
|
|
|
|
|
|
|
208
|
|
|
|
|
|
|
# *IF* there is a $5 it's a year |
209
|
9
|
|
50
|
|
|
30
|
$year ||= int($5 || 0); |
|
|
|
66
|
|
|
|
|
210
|
|
|
|
|
|
|
} |
211
|
|
|
|
|
|
|
} |
212
|
|
|
|
|
|
|
|
213
|
|
|
|
|
|
|
########################################################################### |
214
|
|
|
|
|
|
|
|
215
|
|
|
|
|
|
|
# Alternate date string like like: 21/dec/93 or dec/21/93 much less common |
216
|
37
|
100
|
100
|
|
|
249
|
if (!$month && $str =~ /(.*)($MONTH_REGEXP)(.*)/) { |
217
|
5
|
|
|
|
|
14
|
my $before = $1; |
218
|
5
|
|
|
|
|
12
|
my $after = $3; |
219
|
|
|
|
|
|
|
|
220
|
|
|
|
|
|
|
# Lookup the numeric month based on the string name |
221
|
5
|
|
50
|
|
|
20
|
$month = $MONTH_MAP->{lc($2)} || 0; |
222
|
|
|
|
|
|
|
|
223
|
|
|
|
|
|
|
# Month starts string: dec/21/93 or feb/14/1999 |
224
|
5
|
100
|
33
|
|
|
21
|
if ($before eq "") { |
|
|
50
|
|
|
|
|
|
225
|
2
|
|
|
|
|
28
|
$after =~ m/(\d{2})$sep(\d{2,4})/; |
226
|
|
|
|
|
|
|
|
227
|
2
|
|
|
|
|
5
|
$day = $1; |
228
|
2
|
|
|
|
|
5
|
$year = $2; |
229
|
|
|
|
|
|
|
|
230
|
|
|
|
|
|
|
# Month in the middle: 21/dec/93 |
231
|
|
|
|
|
|
|
} elsif ($before && $after) { |
232
|
3
|
|
|
|
|
9
|
$before =~ m/(\d+)\D/; # Just the digits |
233
|
3
|
|
50
|
|
|
9
|
$day = $1 || 0; |
234
|
|
|
|
|
|
|
|
235
|
3
|
|
|
|
|
9
|
$after =~ m/\D(\d{2,4})(.)/; # Get the digits AFTER the separator |
236
|
|
|
|
|
|
|
|
237
|
|
|
|
|
|
|
# If it's not a time (has a colon) it's the year |
238
|
3
|
100
|
|
|
|
10
|
if ($2 ne ":") { |
239
|
1
|
|
|
|
|
3
|
$year = $1; |
240
|
|
|
|
|
|
|
} |
241
|
|
|
|
|
|
|
} |
242
|
|
|
|
|
|
|
} |
243
|
|
|
|
|
|
|
|
244
|
|
|
|
|
|
|
########################################################################### |
245
|
|
|
|
|
|
|
|
246
|
37
|
|
|
|
|
53
|
state $rule_3 = qr/ |
247
|
|
|
|
|
|
|
(\b|T) # Anchor point |
248
|
|
|
|
|
|
|
(\d{1,2}): # Hours |
249
|
|
|
|
|
|
|
(\d{1,2}):? # Minutes |
250
|
|
|
|
|
|
|
(\d{2}(Z|\.\d+)?)? # Seconds (optional) |
251
|
|
|
|
|
|
|
\ ?(am|pm|AM|PM)? # AMPM (optional) |
252
|
|
|
|
|
|
|
/x; |
253
|
|
|
|
|
|
|
|
254
|
|
|
|
|
|
|
# Now we look for times: 10:14, 10:14:17, 08:15pm |
255
|
37
|
100
|
|
|
|
240
|
if ($str =~ $rule_3) { |
256
|
27
|
|
|
|
|
71
|
$hour = int($2); |
257
|
27
|
|
|
|
|
39
|
$min = int($3); |
258
|
27
|
|
100
|
|
|
83
|
$sec = $4 || 0; # Not int() cuz it might be float for milliseconds |
259
|
|
|
|
|
|
|
|
260
|
27
|
|
|
|
|
53
|
$sec =~ s/Z$//; |
261
|
|
|
|
|
|
|
|
262
|
|
|
|
|
|
|
# The string of AM or PM |
263
|
27
|
|
100
|
|
|
85
|
my $ampm = lc($6 || ""); |
264
|
|
|
|
|
|
|
|
265
|
|
|
|
|
|
|
# PM means add 12 hours |
266
|
27
|
100
|
|
|
|
55
|
if ($ampm eq "pm") { |
267
|
1
|
|
|
|
|
2
|
$hour += 12; |
268
|
|
|
|
|
|
|
} |
269
|
|
|
|
|
|
|
|
270
|
|
|
|
|
|
|
# 12:15am = 00:15 / 12:15pm = 12:15 so we have to compensate |
271
|
27
|
50
|
66
|
|
|
60
|
if ($ampm && ($hour == 24 || $hour == 12)) { |
|
|
|
100
|
|
|
|
|
272
|
2
|
|
|
|
|
5
|
$hour -= 12; |
273
|
|
|
|
|
|
|
} |
274
|
|
|
|
|
|
|
} |
275
|
|
|
|
|
|
|
|
276
|
|
|
|
|
|
|
# Just some basic sanity checking |
277
|
37
|
|
100
|
|
|
107
|
my $has_time = ($hour || $min || $sec); |
278
|
37
|
|
66
|
|
|
100
|
my $has_date = ($year || $month || $day); |
279
|
|
|
|
|
|
|
|
280
|
37
|
100
|
100
|
|
|
110
|
if (!$has_time && !$has_date) { |
281
|
|
|
|
|
|
|
# One final check if NOTHING else has matched, we lookup a weird format: 20020722T100000Z |
282
|
4
|
100
|
|
|
|
13
|
if ($str =~ m/(\d{4})(\d{2})(\d{2})T(\d\d)(\d\d)(\d\d)Z/) { |
283
|
1
|
|
|
|
|
4
|
$year = $1; |
284
|
1
|
|
|
|
|
3
|
$month = $2; |
285
|
1
|
|
|
|
|
2
|
$day = $3; |
286
|
|
|
|
|
|
|
|
287
|
1
|
|
|
|
|
4
|
$hour = $4; |
288
|
1
|
|
|
|
|
2
|
$min = $5; |
289
|
1
|
|
|
|
|
2
|
$sec = $6; |
290
|
|
|
|
|
|
|
} else { |
291
|
3
|
|
|
|
|
19
|
return undef; |
292
|
|
|
|
|
|
|
} |
293
|
|
|
|
|
|
|
} |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
########################################################################### |
296
|
|
|
|
|
|
|
########################################################################### |
297
|
|
|
|
|
|
|
|
298
|
|
|
|
|
|
|
# Sanity check some basic boundaries |
299
|
|
|
|
|
|
|
# I don't think we need this any more since we eval() and timegm_modern() will barf and return undef |
300
|
|
|
|
|
|
|
#if ($month > 12 || $day > 31 || $hour > 23 || $min > 60 || $sec > 61) { |
301
|
|
|
|
|
|
|
# return undef; |
302
|
|
|
|
|
|
|
#} |
303
|
|
|
|
|
|
|
|
304
|
34
|
|
66
|
|
|
92
|
$month ||= (localtime())[4] + 1; # If there is no month, we assume the current month |
305
|
34
|
|
66
|
|
|
74
|
$day ||= (localtime())[3]; # If there is no day, we assume the current day |
306
|
|
|
|
|
|
|
# If we STILL don't have a year it may be a time only string so we assume it's the current year |
307
|
34
|
|
66
|
|
|
184
|
$year ||= (localtime())[5] + 1900; |
308
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
# Convert any two digit years to four digits |
310
|
34
|
100
|
|
|
|
97
|
if ($year < 100) { |
311
|
5
|
|
|
|
|
7
|
$year += 1900; |
312
|
|
|
|
|
|
|
} |
313
|
|
|
|
|
|
|
|
314
|
|
|
|
|
|
|
# Time::Local doesn't support fractional seconds, so we make an int version |
315
|
|
|
|
|
|
|
# and then add the ms after the timegm_modern() conversion |
316
|
34
|
|
|
|
|
62
|
$ms = $sec - int($sec); |
317
|
34
|
|
|
|
|
42
|
$sec = int($sec); |
318
|
|
|
|
|
|
|
|
319
|
|
|
|
|
|
|
# If we have all the requisite pieces we build a unixtime |
320
|
34
|
|
|
|
|
48
|
my $ret; |
321
|
34
|
50
|
0
|
|
|
47
|
my $err = $@ || 'Error' unless eval { |
322
|
34
|
|
|
|
|
102
|
$ret = Time::Local::timegm_modern($sec, $min, $hour, $day, $month - 1, $year); |
323
|
|
|
|
|
|
|
|
324
|
34
|
|
|
|
|
1616
|
return 1; |
325
|
|
|
|
|
|
|
}; |
326
|
|
|
|
|
|
|
|
327
|
34
|
50
|
33
|
|
|
72
|
if ($err && $err =~ /Undefined subroutine/) { |
328
|
0
|
|
|
|
|
0
|
print STDERR $err; |
329
|
0
|
|
|
|
|
0
|
return undef; |
330
|
|
|
|
|
|
|
}; |
331
|
|
|
|
|
|
|
|
332
|
34
|
|
|
|
|
42
|
$ret += $ms; |
333
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
# If we find a timezone offset we take that in to account now |
335
|
|
|
|
|
|
|
# Either: +1000 or -0700 |
336
|
|
|
|
|
|
|
# or |
337
|
|
|
|
|
|
|
# 11:53 PST (One to four chars after a time) |
338
|
34
|
|
|
|
|
52
|
my $tz_offset_seconds = 0; |
339
|
34
|
|
|
|
|
46
|
my $tz_str = ''; |
340
|
34
|
|
|
|
|
43
|
state $tz_rule = qr/ |
341
|
|
|
|
|
|
|
( |
342
|
|
|
|
|
|
|
(\s|:\d\d) # Start AFTER a space, or time (:12) |
343
|
|
|
|
|
|
|
([+-])(\d{1,2})(\d{2}) # +1000 or -700 (three or four digits) |
344
|
|
|
|
|
|
|
| |
345
|
|
|
|
|
|
|
\d{2}\ # Only match chars if they're AFTER a time |
346
|
|
|
|
|
|
|
([A-Z]{1,4})\b # Capitalized TZ at end of string |
347
|
|
|
|
|
|
|
| |
348
|
|
|
|
|
|
|
\d{2}(Z)$ # Just a simple Z at the end |
349
|
|
|
|
|
|
|
) |
350
|
|
|
|
|
|
|
/x; |
351
|
|
|
|
|
|
|
|
352
|
34
|
100
|
100
|
|
|
433
|
if ($ret && $str =~ $tz_rule) { |
|
|
100
|
|
|
|
|
|
353
|
15
|
|
|
|
|
28
|
my $str_offset = 0; |
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
# String timezone: 11:53 PST |
356
|
15
|
100
|
100
|
|
|
55
|
if ($6 || $7) { |
357
|
|
|
|
|
|
|
# Whichever form matches, the TZ is that one |
358
|
10
|
|
50
|
|
|
27
|
my $tz_code = $6 || $7 || ''; |
359
|
|
|
|
|
|
|
|
360
|
|
|
|
|
|
|
# Lookup the timezone offset in the table |
361
|
10
|
|
100
|
|
|
39
|
$str_offset = $TZ_OFFSET->{$tz_code} || 0; |
362
|
|
|
|
|
|
|
# Timezone offsets are in hours, so we convert to seconds |
363
|
10
|
|
|
|
|
19
|
$str_offset *= 3600; |
364
|
|
|
|
|
|
|
|
365
|
10
|
|
|
|
|
16
|
$tz_str = $tz_code; |
366
|
|
|
|
|
|
|
# Numeric format: +1000 or -0700 |
367
|
|
|
|
|
|
|
} else { |
368
|
|
|
|
|
|
|
# Break the input string into parts so we can do math |
369
|
|
|
|
|
|
|
# +1000 = 10 hours, -0700 = 7 hours, +0430 = 4.5 hours |
370
|
5
|
|
|
|
|
18
|
$str_offset = ($4 + ($5 / 60)) * 3600; |
371
|
|
|
|
|
|
|
|
372
|
5
|
100
|
|
|
|
16
|
if ($3 eq "-") { |
373
|
4
|
|
|
|
|
5
|
$str_offset *= -1; |
374
|
|
|
|
|
|
|
} |
375
|
|
|
|
|
|
|
|
376
|
5
|
|
|
|
|
17
|
$tz_str = "$2$3$4"; |
377
|
|
|
|
|
|
|
} |
378
|
|
|
|
|
|
|
|
379
|
15
|
|
|
|
|
23
|
$tz_offset_seconds = $str_offset; |
380
|
|
|
|
|
|
|
# No timezone info found so we assume the local timezone |
381
|
|
|
|
|
|
|
} elsif ($ret) { |
382
|
17
|
|
|
|
|
38
|
my $local_offset = get_local_offset($ret); |
383
|
|
|
|
|
|
|
|
384
|
17
|
|
|
|
|
23
|
$tz_offset_seconds = $local_offset; |
385
|
17
|
|
|
|
|
31
|
$tz_str = 'UNSPECIFIED'; |
386
|
|
|
|
|
|
|
} |
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
# Subtract the timezone offset from the unixtime |
389
|
34
|
|
|
|
|
56
|
$ret -= $tz_offset_seconds; |
390
|
|
|
|
|
|
|
|
391
|
34
|
50
|
|
|
|
68
|
if ($debug) { |
392
|
0
|
|
|
|
|
0
|
my $color = "\e[38;5;45m"; |
393
|
0
|
|
|
|
|
0
|
my $reset = "\e[0m"; |
394
|
0
|
|
|
|
|
0
|
my $header = sprintf("%*s = YYYY-MM-DD HH:II:SS (timezone offset)", length($str) + 2, "Input string"); |
395
|
0
|
|
0
|
|
|
0
|
my $output = sprintf("'%s' = %02d-%02d-%02d %02d:%02d:%02d (%s = %d seconds)", $str, $year || -1, $month || -1, $day || -1, $hour, $min, $sec, $tz_str, $tz_offset_seconds); |
|
|
|
0
|
|
|
|
|
|
|
|
0
|
|
|
|
|
396
|
|
|
|
|
|
|
|
397
|
0
|
|
|
|
|
0
|
print STDERR $color . $header . $reset . "\n"; |
398
|
0
|
|
|
|
|
0
|
print STDERR $output . "\n"; |
399
|
|
|
|
|
|
|
} |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
|
402
|
34
|
|
|
|
|
168
|
return $ret; |
403
|
|
|
|
|
|
|
} |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
# Return the timezone offset for the local machine |
406
|
|
|
|
|
|
|
sub get_local_offset { |
407
|
17
|
|
|
17
|
0
|
28
|
my $unixtime = $_[0]; |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
# Since timezones only change on the half-hour (at most), we |
410
|
|
|
|
|
|
|
# round down the nearest half hour "bucket" and then cache |
411
|
|
|
|
|
|
|
# that result. We probably could get away with a full hour |
412
|
|
|
|
|
|
|
# here but we don't gain much performance/memory by doing that |
413
|
17
|
|
|
|
|
24
|
my $bucket_size = 1800; |
414
|
17
|
|
|
|
|
32
|
my $cache_key = $unixtime - ($unixtime % $bucket_size); |
415
|
|
|
|
|
|
|
|
416
|
|
|
|
|
|
|
# If we have a forced LOCAL_TZ_OFFSET we use that (unit tests) |
417
|
17
|
50
|
|
|
|
34
|
if (defined($LOCAL_TZ_OFFSET)) { |
418
|
17
|
|
|
|
|
38
|
return $LOCAL_TZ_OFFSET; |
419
|
|
|
|
|
|
|
} |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
# Simple memoizing (improves repeated performance a LOT) |
422
|
|
|
|
|
|
|
# Note: this is even faster than `use Memoize` |
423
|
0
|
|
|
|
|
|
state $x = {}; |
424
|
0
|
0
|
0
|
|
|
|
if ($USE_TZ_CACHE && $x->{$cache_key}) { |
425
|
0
|
|
|
|
|
|
return $x->{$cache_key}; |
426
|
|
|
|
|
|
|
} |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
# Get a time obj for this local timezone and UTC for the Unixtime |
429
|
|
|
|
|
|
|
# Then compare the two to get the local TZ offset |
430
|
0
|
|
|
|
|
|
my @t = localtime($unixtime); |
431
|
0
|
|
|
|
|
|
my $ret = (Time::Local::timegm(@t) - Time::Local::timelocal(@t)); |
432
|
|
|
|
|
|
|
|
433
|
|
|
|
|
|
|
# Cache the result |
434
|
0
|
0
|
|
|
|
|
if ($USE_TZ_CACHE) { |
435
|
0
|
|
|
|
|
|
$x->{$cache_key} = $ret; |
436
|
|
|
|
|
|
|
} |
437
|
|
|
|
|
|
|
|
438
|
0
|
|
|
|
|
|
return $ret; |
439
|
|
|
|
|
|
|
} |
440
|
|
|
|
|
|
|
|
441
|
|
|
|
|
|
|
1; |
442
|
|
|
|
|
|
|
|
443
|
|
|
|
|
|
|
__END__ |