1 files changed, 135 insertions, 0 deletions
diff --git a/fix-numbers.pl b/fix-numbers.pl
new file mode 100755
index 0000000..2170856
--- /dev/null
+++ b/fix-numbers.pl
@@ -0,0 +1,135 @@
+#!/usr/bin/perl
+
+use strict;
+
+sub find_footnotes {
+	my @text = @_;
+	my @notes = ();
+	my $found = 0;
+	my $l;
+
+	for ($l = 0; $l <= $#text; $l++) {
+		if ($text[$l] =~ m/^FOOTNOTES:$/) {
+			$found = 1;
+		}
+		next unless $found;
+		if ($text[$l] =~ m/^\[[0-9]+\]\s/) {
+			push @notes, $l;
+		}
+	}
+	return @notes;
+};
+
+sub find_sections {
+	my @text = @_;
+	my @sections = ();
+	my $l;
+
+	for ($l = 0; $l <= $#text - 1; $l++) {
+		next unless (($text[$l + 1] =~ m/^=======*$/) or
+			     ($text[$l + 1] =~ m/^-------*$/));
+
+		next unless ($text[$l] =~ m/^(([0-9]+\.)+) /);
+
+		push @sections, $l;
+
+	}
+	return @sections;
+};
+
+sub get_section {
+	my ($section, @prevpath) = @_;
+	my @path = split(/\./, $section);
+
+	#Possible cases:
+	if ($#path > $#prevpath) {
+#		Path deeper than parent: just add .1
+		my $diff = $#path - $#prevpath;
+		@path = @prevpath;
+		for (my $i = 0; $i < $diff; $i++) {
+			push @path, 1;
+		}
+	} elsif ($#path == $#prevpath) {
+#		Same level as parent
+		@path = @prevpath;
+		$path[$#path]++;
+	} elsif ($#path < $#prevpath) {
+#		Higher level than parent
+		@path = @prevpath[0 .. $#path];
+		$path[$#path]++;
+	}
+	my $newsection = join('.', @path) . '.';
+	my $prev = join('.', @prevpath) . '.';
+	return ($newsection, @path);
+};
+
+my @text = ();
+while (<>) {
+	push @text, $_;
+}
+
+my @footnotes = find_footnotes(@text);
+my @sections = find_sections(@text);
+
+#Set new numbers for footnotes
+my %footnote_by_old_reference = ();
+my $f;
+for ($f = 0; $f <= $#footnotes; $f++) {
+	my $l = $footnotes[$f];
+	die unless ($text[$l] =~ m/^\[([0-9]+)\]\s/);
+	my $footnote = $1;
+	my $newfootnote = $f + 1;
+	die "duplicate footnote number $footnote" if defined($footnote_by_old_reference{$footnote});
+	$footnote_by_old_reference{$footnote} = $newfootnote;
+}
+
+#Find and fix references to footnotes
+my $l;
+for ($l = 0; $l <= $#text; $l++) {
+	next unless $text[$l] =~ m/\[[0-9]+\]/; #premature optimization
+	for my $old (keys(%footnote_by_old_reference)) {
+		my $new = $footnote_by_old_reference{$old};
+		next if $new eq $old;
+		$text[$l] =~ s/\[$old\]/[XYX$new]/g;
+	}
+	$text[$l] =~ s/\[XYX/[/go;
+}
+
+#Set new numbers for sections
+my %section_by_old_reference = ();
+my $s;
+my @path = ();
+
+for ($s = 0; $s <= $#sections; $s++) {
+	my $l = $sections[$s];
+	die unless ($text[$l] =~ m/^(([0-9]+\.)+)/);
+	my $section = $1;
+	my ($newsection, @p) = get_section($section, @path);
+	@path = @p;
+	die "duplicate section number $section" if defined($section_by_old_reference{$section});
+	$section_by_old_reference{$section} = $newsection;
+}
+
+#Find and fix references to sections
+my $l;
+for ($l = 0; $l <= $#text; $l++) {
+	next unless $text[$l] =~ m/^(([0-9]+\.)+)/; #premature optimization
+	for my $old (keys(%section_by_old_reference)) {
+		my $new = $section_by_old_reference{$old};
+		next if $new eq $old;
+		
+		my @p = split(/\./, $old);
+		my $pattern = join("\\.", @p) . "\\.";
+		my @s = split(/\./, $new);
+		my $subst = join("XYX", @s) . "XYX";
+		$text[$l] =~ s/$pattern/$subst/g;
+	}
+	$text[$l] =~ s/XYX/./go;
+}
+
+
+for my $line (@text) {
+	print $line;
+}
+
+