/usr/lib/perl5/Date/Calc/XS.pm is in libdate-calc-xs-perl 6.2-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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## ##
## Copyright (c) 1995 - 2009 by Steffen Beyer. ##
## All rights reserved. ##
## ##
## This package is free software; you can redistribute it ##
## and/or modify it under the same terms as Perl itself. ##
## ##
###############################################################################
package Date::Calc::XS;
BEGIN { eval { require bytes; }; }
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $VERSION);
use Carp::Clan qw(^Date::);
require Exporter;
require DynaLoader;
@ISA = qw(Exporter DynaLoader);
@EXPORT = qw();
@EXPORT_OK = qw(
Days_in_Year
Days_in_Month
Weeks_in_Year
leap_year
check_date
check_time
check_business_date
Day_of_Year
Date_to_Days
Day_of_Week
Week_Number
Week_of_Year
Monday_of_Week
Nth_Weekday_of_Month_Year
Standard_to_Business
Business_to_Standard
Delta_Days
Delta_DHMS
Delta_YMD
Delta_YMDHMS
N_Delta_YMD
N_Delta_YMDHMS
Normalize_DHMS
Add_Delta_Days
Add_Delta_DHMS
Add_Delta_YM
Add_Delta_YMD
Add_Delta_YMDHMS
Add_N_Delta_YMD
Add_N_Delta_YMDHMS
System_Clock
Today
Now
Today_and_Now
This_Year
Gmtime
Localtime
Mktime
Timezone
Date_to_Time
Time_to_Date
Easter_Sunday
Decode_Month
Decode_Day_of_Week
Decode_Language
Decode_Date_EU
Decode_Date_US
Fixed_Window
Moving_Window
Compress
Uncompress
check_compressed
Compressed_to_Text
Date_to_Text
Date_to_Text_Long
English_Ordinal
Calendar
Month_to_Text
Day_of_Week_to_Text
Day_of_Week_Abbreviation
Language_to_Text
Language
Languages
Decode_Date_EU2
Decode_Date_US2
Parse_Date
ISO_LC
ISO_UC
);
%EXPORT_TAGS = (all => [@EXPORT_OK]);
##################################################
## ##
## "Version()" is available but not exported ##
## in order to avoid possible name clashes. ##
## Call "Date::Calc::XS::Version()" instead! ##
## ##
##################################################
$VERSION = '6.2';
bootstrap Date::Calc::XS $VERSION;
sub Decode_Date_EU2
{
croak "Usage: (\$year,\$month,\$day) = Decode_Date_EU2(\$date[,\$lang]);\n" unless ((@_ == 1) or (@_ == 2));
my($buffer) = shift;
my($lang) = shift || 0;
my($year,$month,$day,$length);
$lang = Language() unless (($lang >= 1) and ($lang <= Languages()));
if ($buffer =~ /^\D* (\d+) [^A-Za-z0-9\xC0-\xD6\xD8-\xF6\xF8-\xFF]* ([A-Za-z\xC0-\xD6\xD8-\xF6\xF8-\xFF]+) [^A-Za-z0-9\xC0-\xD6\xD8-\xF6\xF8-\xFF]* (\d+) \D*$/x)
{
($day,$month,$year) = ($1,$2,$3);
$month = Decode_Month($month,$lang);
unless ($month > 0)
{
return(); # can't decode month!
}
}
elsif ($buffer =~ /^\D* 0*(\d+) \D*$/x)
{
$buffer = $1;
$length = length($buffer);
if ($length == 3)
{
$day = substr($buffer,0,1);
$month = substr($buffer,1,1);
$year = substr($buffer,2,1);
}
elsif ($length == 4)
{
$day = substr($buffer,0,1);
$month = substr($buffer,1,1);
$year = substr($buffer,2,2);
}
elsif ($length == 5)
{
$day = substr($buffer,0,1);
$month = substr($buffer,1,2);
$year = substr($buffer,3,2);
}
elsif ($length == 6)
{
$day = substr($buffer,0,2);
$month = substr($buffer,2,2);
$year = substr($buffer,4,2);
}
elsif ($length == 7)
{
$day = substr($buffer,0,1);
$month = substr($buffer,1,2);
$year = substr($buffer,3,4);
}
elsif ($length == 8)
{
$day = substr($buffer,0,2);
$month = substr($buffer,2,2);
$year = substr($buffer,4,4);
}
else { return(); } # wrong number of digits!
}
elsif ($buffer =~ /^\D* (\d+) \D+ (\d+) \D+ (\d+) \D*$/x)
{
($day,$month,$year) = ($1,$2,$3);
}
else { return(); } # no match at all!
$year = Moving_Window($year);
if (check_date($year,$month,$day))
{
return($year,$month,$day);
}
else { return(); } # not a valid date!
}
sub Decode_Date_US2
{
croak "Usage: (\$year,\$month,\$day) = Decode_Date_US2(\$date[,\$lang]);\n" unless ((@_ == 1) or (@_ == 2));
my($buffer) = shift;
my($lang) = shift || 0;
my($year,$month,$day,$length);
$lang = Language() unless (($lang >= 1) and ($lang <= Languages()));
if ($buffer =~ /^[^A-Za-z0-9\xC0-\xD6\xD8-\xF6\xF8-\xFF]* ([A-Za-z\xC0-\xD6\xD8-\xF6\xF8-\xFF]+) [^A-Za-z0-9\xC0-\xD6\xD8-\xF6\xF8-\xFF]* 0*(\d+) \D*$/x)
{
($month,$buffer) = ($1,$2);
$month = Decode_Month($month,$lang);
unless ($month > 0)
{
return(); # can't decode month!
}
$length = length($buffer);
if ($length == 2)
{
$day = substr($buffer,0,1);
$year = substr($buffer,1,1);
}
elsif ($length == 3)
{
$day = substr($buffer,0,1);
$year = substr($buffer,1,2);
}
elsif ($length == 4)
{
$day = substr($buffer,0,2);
$year = substr($buffer,2,2);
}
elsif ($length == 5)
{
$day = substr($buffer,0,1);
$year = substr($buffer,1,4);
}
elsif ($length == 6)
{
$day = substr($buffer,0,2);
$year = substr($buffer,2,4);
}
else { return(); } # wrong number of digits!
}
elsif ($buffer =~ /^[^A-Za-z0-9\xC0-\xD6\xD8-\xF6\xF8-\xFF]* ([A-Za-z\xC0-\xD6\xD8-\xF6\xF8-\xFF]+) [^A-Za-z0-9\xC0-\xD6\xD8-\xF6\xF8-\xFF]* (\d+) \D+ (\d+) \D*$/x)
{
($month,$day,$year) = ($1,$2,$3);
$month = Decode_Month($month,$lang);
unless ($month > 0)
{
return(); # can't decode month!
}
}
elsif ($buffer =~ /^\D* 0*(\d+) \D*$/x)
{
$buffer = $1;
$length = length($buffer);
if ($length == 3)
{
$month = substr($buffer,0,1);
$day = substr($buffer,1,1);
$year = substr($buffer,2,1);
}
elsif ($length == 4)
{
$month = substr($buffer,0,1);
$day = substr($buffer,1,1);
$year = substr($buffer,2,2);
}
elsif ($length == 5)
{
$month = substr($buffer,0,1);
$day = substr($buffer,1,2);
$year = substr($buffer,3,2);
}
elsif ($length == 6)
{
$month = substr($buffer,0,2);
$day = substr($buffer,2,2);
$year = substr($buffer,4,2);
}
elsif ($length == 7)
{
$month = substr($buffer,0,1);
$day = substr($buffer,1,2);
$year = substr($buffer,3,4);
}
elsif ($length == 8)
{
$month = substr($buffer,0,2);
$day = substr($buffer,2,2);
$year = substr($buffer,4,4);
}
else { return(); } # wrong number of digits!
}
elsif ($buffer =~ /^\D* (\d+) \D+ (\d+) \D+ (\d+) \D*$/x)
{
($month,$day,$year) = ($1,$2,$3);
}
else { return(); } # no match at all!
$year = Moving_Window($year);
if (check_date($year,$month,$day))
{
return($year,$month,$day);
}
else { return(); } # not a valid date!
}
sub Parse_Date
{
croak "Usage: (\$year,\$month,\$day) = Parse_Date(\$date[,\$lang]);\n" unless ((@_ == 1) or (@_ == 2));
my($date) = shift;
my($lang) = shift || 0;
my($year,$month,$day);
$lang = Language() unless (($lang >= 1) and ($lang <= Languages()));
unless ($date =~ /\b([\x41-\x5A\x61-\x7A\xC0-\xD6\xD8-\xF6\xF8-\xFF]{3})\s+([0123]??\d)\b/)
{
return();
}
$month = $1;
$day = $2;
unless ($date =~ /\b(19\d\d|20\d\d)\b/)
{
return();
}
$year = $1;
$month = Decode_Month($month,$lang);
unless ($month > 0)
{
return();
}
unless (check_date($year,$month,$day))
{
return();
}
return($year,$month,$day);
}
1;
__END__
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