107 lines
2.4 KiB
Perl
107 lines
2.4 KiB
Perl
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#! /usr/bin/perl
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# ex:ts=8 sw=4:
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# $OpenBSD: ISO8601.pm,v 1.2 2023/07/07 14:43:57 espie Exp $
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#
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# Copyright (c) 2023 Marc Espie <espie@openbsd.org>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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use v5.36;
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package DPB::ISO8601;
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# this parses a subset of ISO8601, so that the timestamp can be a string
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sub parse($class, $s)
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{
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my $o = bless {
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hour => 0,
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min => 0,
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sec => 0,
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islocal => 1 }, $class;
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if ($s =~ s/Z$//) {
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$o->{islocal} = 0;
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}
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if ($s =~ s/^(\d{4})\-(\d{2})\-(\d{2})(T|$)//) {
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($o->{year}, $o->{month}, $o->{day}) = ($1, $2, $3);
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} else {
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return undef;
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}
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if ($s eq '') {
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return $o;
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}
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if ($s =~ s/^(\d{2})(\:|$)//) {
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$o->{hour} = $1;
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} else {
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return undef;
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}
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if ($s eq '') {
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return $o;
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}
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if ($s =~ s/^(\d{2})(\:|$)//) {
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$o->{min} = $1;
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} else {
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return undef;
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}
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if ($s eq '') {
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return $o;
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}
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if ($s =~ s/^(\d{2})(\:|$)//) {
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$o->{sec} = $1;
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} else {
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return undef;
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}
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if ($s eq '') {
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return $o;
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} else {
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return undef;
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}
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}
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sub _string2time($class, $s)
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{
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my $o = $class->parse($s);
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if (defined $o) {
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require POSIX;
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local $ENV{TZ};
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if (!$o->{islocal}) {
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$ENV{TZ} = 'UTC';
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}
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my $t = POSIX::mktime($o->{sec}, $o->{min}, $o->{hour},
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$o->{day}, $o->{month} - 1, $o->{year} - 1900);
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return $t;
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} else {
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return undef;
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}
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}
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sub string2time($class, $ts, $state)
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{
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my $result = $class->_string2time($ts);
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if (!defined $result) {
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$state->fatal("String #1 does not parse as ISO8601 date (YYYY-MM-DDTHH:MM:SSZ)", $ts);
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}
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return $result;
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}
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sub time2string($class, $ts)
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{
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my $time = int($ts);
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my ($sufx, $sec, $min, $hour, $day, $month, $year, @rest) =
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defined $ENV{TZ} ? ('', localtime($ts)) : ('Z', gmtime($ts));
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return sprintf("%04d-%02d-%02dT%02d:%02d:%02d%s",
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$year+1900, $month+1, $day, $hour, $min, $sec, $sufx);
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}
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1;
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