charnames.t: Fix to work on Unicodes without NameAliases

This is a recent addition.  Use alternate means if the file doesn't
exist in the Unicode release, or is for a non-ASCII platform (as the
alternate means should take care of the translation in that case).

diff --git a/lib/charnames.t b/lib/charnames.t
index b7a04ea..5ff37bc 100644 (file)
--- a/lib/charnames.t
+++ b/lib/charnames.t
@@ -1070,9 +1070,50 @@ is("\N{U+1D0C5}", "\N{BYZANTINE MUSICAL SYMBOL FTHORA SKLIRON CHROMA VASIS}", 'V
     }
     }
 
     }
     }
 

-    open $fh, "<", "../../lib/unicore/NameAliases.txt" or
-        die "Can't open ../../lib/unicore/NameAliases.txt: $!";
-    while (<$fh>) {
+    my @name_aliases;
+    use Unicode::UCD;
+    if (ord('A') != 65
+        || pack( "C*", split /\./, Unicode::UCD::UnicodeVersion()) ge v6.1.0)
+    {
+        open my $fh, "<", "../../lib/unicore/NameAliases.txt"
+            or die "Can't open ../../lib/unicore/NameAliases.txt: $!";
+        @name_aliases = <$fh>
+    }
+    else {
+
+        # If this Unicode version doesn't have the full .txt file, or are on
+        # an EBCDIC platform where they need to be translated, get the data
+        # from prop_invmap() (which should do the translation) and convert it
+        # to the file's format
+        use Unicode::UCD 'prop_invmap';
+        my ($invlist_ref, $invmap_ref, undef, $default)
+                                                = prop_invmap('Name_Alias');
+        for my $i (0 .. @$invlist_ref - 1) {
+
+            # Convert the aliases for code points that have just one alias to
+            # single element arrays for uniform handling below.
+            if (! ref $invmap_ref->[$i]) {
+
+                # But we test only the real aliases, not the ones which are
+                # just really placeholders.
+                next if $invmap_ref->[$i] eq $default;
+
+                $invmap_ref->[$i] = [ $invmap_ref->[$i] ];
+            }
+
+
+            # Change each alias for the code point to the form that the file
+            # has
+            foreach my $j ($invlist_ref->[$i] .. $invlist_ref->[$i+1] - 1) {
+                foreach my $value (@{$invmap_ref->[$i]}) {
+                    $value =~ s/: /;/;
+                    push @name_aliases, sprintf("%04X;%s\n", $j, $value);
+                }
+            }
+        }
+    }
+
+    for (@name_aliases) {

         chomp;
         s/^\s*#.*//;
         next unless $_;
         chomp;
         s/^\s*#.*//;
         next unless $_;