unicode: Use existing helpers to build the l_intl.nls file.

tools/make_unicode

@@ -1983,66 +1983,21 @@ sub dump_two_level_mapping($$@)
 sub dump_binary_case_table(@)
 {
     my (@table) = @_;
+    my $max_char = 0x10000;
+    my $level1 = $max_char / 16;
+    my $level2 = $level1 / 16;
 
-    my %difftables_hash = ();
-    my @difftables;
-    my %offtables2_hash = ();
-    my @offtables2 = ();
-    
-    my @offtable = ();
-    for (my $i = 0; $i < 256; $i++)
+    my @difftable;
+    for (my $i = 0; $i < @table; $i++)
     {
-        my @offtable2 = ();
-        for(my $j = 0; $j < 16; $j++) # offset table for xx00-xxFF characters
-        {
-            my @difftable;
-            for (my $k = 0; $k < 16; $k++) # case map table for xxx0-xxxF characters
-            {
-                my $char = ($i<<8) + ($j<<4) + $k;
-                $difftable[$k] = (defined $table[$char]) ? (($table[$char]-$char) & 0xffff) : 0;
-            }
-
-            my $diff_key = pack "S*", @difftable;
-            my $offset3 = $difftables_hash{$diff_key};
-            if (!defined $offset3)
-            {
-                $offset3 = scalar @difftables;
-                $difftables_hash{$diff_key} = $offset3;
-                push @difftables, @difftable;
-            }
-            $offtable2[$j] = $offset3;
-        }
-
-        my $offtable2_key = pack "S*", @offtable2;
-        my $offset2 = $offtables2_hash{$offtable2_key};
-        if (!defined $offset2)
-        {
-            $offset2 = scalar @offtables2;
-            $offtables2_hash{$offtable2_key} = $offset2;
-            push @offtables2, \@offtable2;
-        }
-        $offtable[$i] = $offset2;
-    }
-
-    my @output;
-    my $offset = 0x100; # offset of first subtable in words
-    foreach (@offtable)
-    {
-        push @output, 0x10 * $_ + $offset; # offset of subtable in words
-    }
-
-    $offset = 0x100 + 0x10 * scalar @offtables2; # offset of first difftable in words
-    foreach(@offtables2)
-    {
-        my $table = $_;
-        foreach(@$table)
-        {
-            push @output, $_ + $offset; # offset of difftable in words
-        }
+        next unless defined $table[$i];
+        $difftable[$i] = ($table[$i] - $i) & 0xffff;
     }
 
-    my $len = 1 + scalar @output + scalar @difftables;
-    return pack "S<*", $len, @output, @difftables;
+    my @row_array = compress_array( $level1, 0, @difftable[0..$max_char-1] );
+    my @array = compress_array( $level2, 0, @row_array[0..$level1-1] );
+    for (my $i = $level2; $i < @array; $i++) { $array[$i] += @array - $level1; }
+    return @array, @row_array[$level1..$#row_array];
 }
 
 
@@ -2050,14 +2005,17 @@ sub dump_binary_case_table(@)
 # dump case mappings for l_intl.nls
 sub dump_intl_nls($)
 {
+    my @upper = dump_binary_case_table( @toupper_table );
+    my @lower = dump_binary_case_table( @tolower_table );
+
     my $filename = shift;
     open OUTPUT,">$filename.new" or die "Cannot create $filename";
     printf "Building $filename\n";
 
     binmode OUTPUT;
     print OUTPUT pack "S<", 1;  # version
-    print OUTPUT dump_binary_case_table( @toupper_table );
-    print OUTPUT dump_binary_case_table( @tolower_table );
+    print OUTPUT pack "S<*", 1 + scalar @upper, @upper;
+    print OUTPUT pack "S<*", 1 + scalar @lower, @lower;
     close OUTPUT;
     save_file($filename);
 }