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#!/usr/bin/env perl
use warnings;
use integer;
#Converts text with KBtin-style color codes (~n~) to ANSI.
$lastcol=$col="\e[0m";
my ($fg,$bg,$at) = (7,0,0);
%ct=(0=>0, 1=>4, 2=>2, 3=>6, 4=>1, 5=>5, 6=>3, 7=>7);
sub get256c($)
{
my $c = $_[0];
return 16+36*($c/100)+6*($c/10 % 10)+($c % 10);
}
while(<>)
{
$line="";
while(/\G(.*?)~(\-1|\d+|\d*:\d*(?::\d*)?)~/gc)
{
$line.=$1;
next if $2 eq "-1" && ($line.=$col=$lastcol);
$2 =~ /^(\d*)(?::(\d*)(?::(\d*))?)?$/;
$fg=($1 eq "")?($cn&0xf):$1;
$bg=(!defined $2)?0:($2 eq "")?(($cn&0x70)>>4):$2;
$at=(!defined $3)?0:($3 eq "")?($cn>>7):$3;
if ($1 && $1>16)
{
$cn=0;
$col.="\e[0;38;5;".get256c($1);
$line.=$col.="m";
next; # no 256c backgrounds in the help...
}
die "Invalid color code in [$_]" if $fg>15&&($bg||$at) || $bg>7;
$vcn=$cn=$fg+$bg*0x10+$at*0x80;
$vcn|=7 if ($vcn&0xf)==($vcn&0x70)>>4;
$vcn&=~7 if ($vcn&0xf)==($vcn&0x70)>>4;
$col="\e[0";
if(($vcn&0xf)==8)
{
$col.=";2";
}
else
{
$col.=";3".$ct{$vcn&0x7} if ($vcn&0x7)!=7;
$col.=";1" if ($vcn&0x8);
}
$col.=";4".$ct{($vcn>>4)&0x7} if $vcn&0x70;
$col.=";5" if $vcn&0x80;
$col.=";3" if $vcn&0x100;
$col.=";4" if $vcn&0x200;
$col.=";9" if $vcn&0x400;
$line.=$col.="m";
}
/\G(.*)/;
print "$line$1\n";
$lastcol=$col;
}
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