diff -r 000000000000 -r 6474c204b198 intl/unicharutil/tools/genSpecialCasingData.pl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/unicharutil/tools/genSpecialCasingData.pl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,287 @@
+#!/usr/bin/env perl
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# This tool is used to extract "special" (one-to-many) case mappings
+# into a form that can be used by nsTextRunTransformations.
+
+use strict;
+
+if ($#ARGV != 1) {
+  print <<__EOT;
+# Run this tool using a command line of the form
+#
+#     perl genSpecialCasingData.pl UnicodeData.txt SpecialCasing.txt
+#
+# The nsSpecialCasingData.cpp file will be written to standard output.
+#
+# This tool will also write up-to-date versions of the test files
+#     all-{upper,lower,title}.html
+# and corresponding -ref files in the current directory.
+#
+__EOT
+  exit 0;
+}
+
+my %allLower;
+my %allUpper;
+my %allTitle;
+my %compositions;
+my %gc;
+open FH, "< $ARGV[0]" or die "can't open $ARGV[0] (should be UnicodeData.txt)\n";
+while (<FH>) {
+  chomp;
+  my @fields = split /;/;
+  next if ($fields[1] =~ /</); # ignore ranges etc
+  my $usv = hex "0x$fields[0]";
+  $allUpper{$usv} = $fields[12] if $fields[12] ne '';
+  $allLower{$usv} = $fields[13] if $fields[13] ne '';
+  $allTitle{$usv} = $fields[14] if $fields[14] ne '';
+  $gc{$usv} = $fields[2];
+  # we only care about non-singleton canonical decomps
+  my $decomp = $fields[5];
+  next if $decomp eq '' or $decomp =~ /</ or not $decomp =~ / /;
+  $compositions{$decomp} = sprintf("%04X", $usv);
+}
+close FH;
+
+my %specialLower;
+my %specialUpper;
+my %specialTitle;
+my %charName;
+my @headerLines;
+open FH, "< $ARGV[1]" or die "can't open $ARGV[1] (should be SpecialCasing.txt)\n";
+while (<FH>) {
+  chomp;
+  m/#\s*(.+)$/;
+  my $comment = $1;
+  if ($comment =~ /^(SpecialCasing-|Date:)/) {
+    push @headerLines, $comment;
+    next;
+  }
+  s/#.*//;
+  s/;\s*$//;
+  next if $_ eq '';
+  my @fields = split /; */;
+  next unless (scalar @fields) == 4;
+  my $usv = hex "0x$fields[0]";
+  addIfSpecial(\%specialLower, $usv, $fields[1]);
+  addIfSpecial(\%specialTitle, $usv, $fields[2]);
+  addIfSpecial(\%specialUpper, $usv, $fields[3]);
+  $charName{$usv} = $comment;
+}
+close FH;
+
+print <<__END__;
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Auto-generated from files in the Unicode Character Database
+   by genSpecialCasingData.pl - do not edit! */
+
+#include "nsSpecialCasingData.h"
+#include "mozilla/Util.h" // for ArrayLength
+#include <stdlib.h>       // for bsearch
+
+__END__
+map { print "/* $_ */\n" } @headerLines;
+
+print <<__END__;
+
+using mozilla::unicode::MultiCharMapping;
+
+__END__
+
+printMappings('Lower', \%specialLower);
+printMappings('Upper', \%specialUpper);
+printMappings('Title', \%specialTitle);
+
+print <<__END__;
+static int CompareMCM(const void* aKey, const void* aElement)
+{
+  const uint32_t ch = *static_cast<const uint32_t*>(aKey);
+  const MultiCharMapping* mcm = static_cast<const MultiCharMapping*>(aElement);
+  return int(ch) - int(mcm->mOriginalChar);
+}
+
+#define MAKE_SPECIAL_CASE_ACCESSOR(which) \\
+  const MultiCharMapping* \\
+  Special##which(uint32_t aChar) \\
+  { \\
+    const void* p = bsearch(&aChar, CaseSpecials_##which, \\
+                            mozilla::ArrayLength(CaseSpecials_##which), \\
+                            sizeof(MultiCharMapping), CompareMCM); \\
+    return static_cast<const MultiCharMapping*>(p); \\
+  }
+
+namespace mozilla {
+namespace unicode {
+
+MAKE_SPECIAL_CASE_ACCESSOR(Lower)
+MAKE_SPECIAL_CASE_ACCESSOR(Upper)
+MAKE_SPECIAL_CASE_ACCESSOR(Title)
+
+} // namespace unicode
+} // namespace mozilla
+__END__
+
+addSpecialsTo(\%allLower, \%specialLower);
+addSpecialsTo(\%allUpper, \%specialUpper);
+addSpecialsTo(\%allTitle, \%specialTitle);
+
+my $testFont = "../fonts/dejavu-sans/DejaVuSans.ttf";
+genTest('lower', \%allLower);
+genTest('upper', \%allUpper);
+genTitleTest();
+
+sub printMappings {
+  my ($whichMapping, $hash) = @_;
+  print "static const MultiCharMapping CaseSpecials_${whichMapping}[] = {\n";
+  foreach my $key (sort { $a <=> $b } keys %$hash) {
+    my @chars = split(/ /, $hash->{$key});
+    printf "  { 0x%04x, {0x%04x, 0x%04x, 0x%04x} }, // %s\n", $key,
+           hex "0x0$chars[0]", hex "0x0$chars[1]", hex "0x0$chars[2]",
+           "$charName{$key}";
+  }
+  print "};\n\n";
+};
+
+sub addIfSpecial {
+  my ($hash, $usv, $mapping) = @_;
+  return unless $mapping =~ / /;
+  # only do compositions that start with the initial char
+  foreach (keys %compositions) {
+    $mapping =~ s/^$_/$compositions{$_}/;
+  }
+  $hash->{$usv} = $mapping;
+};
+
+sub addSpecialsTo {
+  my ($hash, $specials) = @_;
+  foreach my $key (keys %$specials) {
+    $hash->{$key} = $specials->{$key};
+  }
+};
+
+sub genTest {
+  my ($whichMapping, $hash) = @_;
+  open OUT, "> all-$whichMapping.html";
+  print OUT <<__END__;
+<!DOCTYPE html>
+<html>
+ <head>
+  <meta http-equiv="Content-type" content="text/html; charset=utf-8">
+  <style type="text/css">
+   \@font-face { font-family: foo; src: url($testFont); }
+   p { font-family: foo; text-transform: ${whichMapping}case; }
+  </style>
+ </head>
+ <body>
+  <p>
+__END__
+  foreach my $key (sort { $a <=> $b } keys %$hash) {
+    printf OUT "&#x%04X;", $key;
+    print OUT " <!-- $charName{$key} -->" if exists $charName{$key};
+    print OUT "\n";
+  }
+  print OUT <<__END__;
+  </p>
+ </body>
+</html>
+__END__
+  close OUT;
+
+  open OUT, "> all-$whichMapping-ref.html";
+  print OUT <<__END__;
+<!DOCTYPE html>
+<html>
+ <head>
+  <meta http-equiv="Content-type" content="text/html; charset=utf-8">
+  <style type="text/css">
+   \@font-face { font-family: foo; src: url($testFont); }
+   p { font-family: foo; }
+  </style>
+ </head>
+ <body>
+  <p>
+__END__
+  foreach my $key (sort { $a <=> $b } keys %$hash) {
+    print OUT join('', map { sprintf("&#x%s;", $_) } split(/ /, $hash->{$key}));
+    print OUT " <!-- $charName{$key} -->" if exists $charName{$key};
+    print OUT "\n";
+  }
+  print OUT <<__END__;
+  </p>
+ </body>
+</html>
+__END__
+  close OUT;
+};
+
+sub genTitleTest {
+  open OUT, "> all-title.html";
+  print OUT <<__END__;
+<!DOCTYPE html>
+<html>
+ <head>
+  <meta http-equiv="Content-type" content="text/html; charset=utf-8">
+  <style type="text/css">
+   \@font-face { font-family: foo; src: url($testFont); }
+   p { font-family: foo; text-transform: capitalize; }
+  </style>
+ </head>
+ <body>
+  <p>
+__END__
+  foreach my $key (sort { $a <=> $b } keys %allTitle) {
+    printf OUT "&#x%04X;x", $key;
+    print OUT " <!-- $charName{$key} -->" if exists $charName{$key};
+    print OUT "\n";
+  }
+  print OUT <<__END__;
+  </p>
+ </body>
+</html>
+__END__
+  close OUT;
+
+  open OUT, "> all-title-ref.html";
+  print OUT <<__END__;
+<!DOCTYPE html>
+<html>
+ <head>
+  <meta http-equiv="Content-type" content="text/html; charset=utf-8">
+  <style type="text/css">
+   \@font-face { font-family: foo; src: url($testFont); }
+   p { font-family: foo; }
+  </style>
+ </head>
+ <body>
+  <p>
+__END__
+  foreach my $key (sort { $a <=> $b } keys %allTitle) {
+    # capitalize is only applied to characters with GC=L* or N*...
+    if ($gc{$key} =~ /^[LN]/) {
+      # ...and those that are already uppercase are not transformed
+      if (exists $allUpper{$key}) {
+        print OUT join('', map { sprintf("&#x%s;", $_) } split(/ /, $allTitle{$key}));
+      } else {
+        printf OUT "&#x%04X;", $key;
+      }
+      print OUT "x";
+    } else {
+      printf OUT "&#x%04X;X", $key;
+    }
+    print OUT " <!-- $charName{$key} -->" if exists $charName{$key};
+    print OUT "\n";
+  }
+  print OUT <<__END__;
+  </p>
+ </body>
+</html>
+__END__
+  close OUT;
+};