build/zoneinfo2lua.pl

   1 #!/usr/bin/perl
   2 # zoneinfo2lua.pl - Make Lua module from /usr/share/zoneinfo
   3 # Execute from within /usr/share/zoneinfo
   4 # $Id$
   5
   6 use strict;
   7
   8 my %TZ;
   9 my $tzdir = $ARGV[0] || "/usr/share/zoneinfo";
  10
  11 chdir($tzdir) || die "chdir($tzdir): $!\n";
  12
  13 local $/ = "\012";
  14 open( ZTAB, "< ./zone.tab" ) || die "Unable to open zone.tab: $!";
  15
  16 while( ! eof ZTAB ) {
  17         chomp( my $line = readline ZTAB );
  18         next if $line =~ /^#/ || $line =~ /^\s+$/;
  19
  20         my ( undef, undef, $zone, @comment ) = split /\s+/, $line;
  21
  22         printf STDERR "%-40s", $zone;
  23
  24         if( open ZONE, "< ./$zone" ) {
  25                 seek ZONE, -2, 2;
  26
  27                 while( tell(ZONE) > 0 ) {
  28                         read ZONE, my $char, 1;
  29                         ( $char eq "\012" ) ? last : seek ZONE, -2, 1;
  30                 }
  31
  32                 chomp( my $tz = readline ZONE );
  33                 print STDERR ( $tz || "(no tzinfo found)" ), "\n";
  34                 close ZONE;
  35
  36                 if( $tz ) {
  37                         $zone =~ s/_/ /g;
  38                         $TZ{$zone} = $tz;
  39                 }
  40         }
  41         else
  42         {
  43                 print STDERR "Unable to open $zone: $!\n";
  44         }
  45 }
  46
  47 close ZTAB;
  48
  49
  50 print <<HEAD;
  51 --[[
  52 LuCI - Autogenerated Zoneinfo Module
  53
  54 Licensed under the Apache License, Version 2.0 (the "License");
  55 you may not use this file except in compliance with the License.
  56 You may obtain a copy of the License at
  57
  58         http://www.apache.org/licenses/LICENSE-2.0
  59
  60 ]]--
  61
  62 module "luci.sys.zoneinfo"
  63
  64 TZ = {
  65 HEAD
  66
  67 foreach my $zone ( sort keys %TZ ) {
  68         printf "\t{ '%s', '%s' },\n", $zone, $TZ{$zone}
  69 }
  70
  71 print <<HEAD;
  72 }
  73
  74 OFFSET = {
  75 HEAD
  76
  77 my %seen;
  78 foreach my $tz ( sort keys %TZ ) {
  79         my $zone = $TZ{$tz};
  80
  81         if( $zone =~ /^
  82                 ([A-Z]+)
  83                 (?:
  84                         ( -? \d+ (?: : \d+ )? )
  85                         (?:
  86                                 ([A-Z]+)
  87                                 ( -? \d+ (?: : \d+ )? )?
  88                         )?
  89                 )?
  90         \b /xo ) {
  91                 my ( $offset, $s, $h, $m ) = ( 0, 1, 0, 0 );
  92                 my ( $std, $soffset, $dst, $doffset ) = ( $1, $2, $3, $4 );
  93
  94                 next if $seen{$std}; # and ( !$dst or $seen{$dst} );
  95
  96                 if ( $soffset ) {
  97                         ( $s, $h, $m ) = $soffset =~ /^(-)?(\d+)(?::(\d+))?$/;
  98
  99                         $s = $s ? 1 : -1;
 100                         $h ||= 0;
 101                         $m ||= 0;
 102
 103                         $offset  = $s * $h * 60 * 60;
 104                         $offset += $s * $m * 60;
 105
 106                         printf("\t%-5s = %6d,\t-- %s\n",
 107                                 lc($std), $offset, $std);
 108
 109                         $seen{$std} = 1;
 110
 111                         if( $dst ) {
 112                                 if( $doffset ) {
 113                                         ( $s, $h, $m ) = $doffset =~ /^(-)?(\d+)(?::(\d+))?$/;
 114
 115                                         $s = $s ? 1 : -1;
 116                                         $h ||= 0;
 117                                         $m ||= 0;
 118
 119                                         $offset  = $s * $h * 60 * 60;
 120                                         $offset += $s * $m * 60;
 121                                 } else  {
 122                                         $offset += 60 * 60;
 123                                 }
 124
 125                                 printf("\t%-5s = %6d,\t-- %s\n",
 126                                         lc($dst), $offset, $dst);
 127
 128                                 $seen{$dst} = 1;
 129                         }
 130                 }
 131                 else {
 132                         printf("\t%-5s = %6d,\t-- %s\n",
 133                                 lc($std), $offset, $std);
 134
 135                         $seen{$std} = 1;
 136                 }
 137
 138         }
 139 }
 140
 141 print "}\n";