From b4c97cd198613dd4631b970ab4e55915237787f7 Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Thu, 6 Apr 2017 21:06:56 +0200
Subject: [PATCH] charset: distinct column count per table

Prevent unicode planes from affecting other tables.
---
 charset.plp | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/charset.plp b/charset.plp
index 73b3740..8dfa91e 100644
--- a/charset.plp
+++ b/charset.plp
@@ -22,7 +22,6 @@ Html({
 use POSIX qw( ceil );
 use Shiar_Sheet::FormatChar;
 my $glyphs = Shiar_Sheet::FormatChar->new;
-my $cols = 16;  # columns
 
 # generate character table(s)
 # (~16x faster than decoding in loop;
@@ -39,7 +38,7 @@ my %ALIAS = (
 );
 my @request = map {
 	if (my $input = $_) {
-		my %row = (offset => 0);
+		my %row = (offset => 0, cols => 16);
 		my $endpoint = 255;
 		if ($input =~ s/^--//) {
 			$row{offset} = $endpoint > 160 ? 160 : 48;
@@ -67,7 +66,7 @@ my @request = map {
 			$row{set} = 'Unicode planes';
 			$row{cell} = do 'charset-ucplanes.inc.pl'
 				or Alert('Table data could not be read', $@ || $!);
-			$cols *= 2;
+			$row{cols} *= 2;
 		}
 		elsif ($row{set} = Encode::resolve_alias($input)) {
 			if ($row{set} eq 'Internal') {
@@ -107,10 +106,12 @@ for my $cp437 (grep {$request[$_]->{set} eq 'cp437'} 0 .. $#request) {
 }
 
 sub range_cell {
-	my ($table, $offset) = @_;
+	my ($info, $offset) = @_;
+	my $table = $info->{cell} or return;
 	my $def = $table->{$offset} or return;
 	my ($len, $class, $name, $title) = @{$def};
 
+	my $cols = $info->{cols};
 	my $colsize = $table->{colsize} || 1;
 	my $attr = '';
 	$len /= $colsize;
@@ -157,6 +158,7 @@ sub range_cell {
 }
 
 for my $row (@request) {
+	my $cols = $row->{cols};
 	my $colsize = $row->{cell} && $row->{cell}->{colsize} || 1;
 	my $coldigits = ceil(log($colsize * $cols) / log(16));  # uniform length of hexadecimal header
 	my $rowdiv = 16 ** $coldigits;  # divider of row headers
@@ -188,7 +190,7 @@ for my $row (@request) {
 		for my $lsb (0 .. $cols - 1) {
 			my $val = ( ($msb * $cols) + $lsb ) * $colsize;
 			if ($row->{cell}) {
-				print range_cell($row->{cell}, $val);
+				print range_cell($row, $val);
 				next;
 			}
 
-- 
2.30.0