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