PushbackReader.java: Merged with Classpath.

* java/io/PushbackReader.java: Merged with Classpath.
	* java/util/Arrays.java: Updated from Classpath.

	* scripts/blocks.pl: New file.
	* java/lang/Character.java (Subset): New class.
	(UnicodeBlock): New class.

	* java/lang/Math.java (toDegrees, toRadians): New methods.

	* java/lang/Float.java: Implement Comparable.
	(compareTo): New methods.
	* java/lang/Double.java: Implement Comparable.
	(compareTo): New methods.

From-SVN: r37512

libjava/scripts/blocks.pl

@@ -0,0 +1,48 @@
+#! /usr/bin/perl
+
+if ($ARGV[0] eq '')
+{
+    $file = 'Blocks.txt';
+    if (! -f $file)
+    {
+	# Too painful to figure out how to get Perl to do it.
+	# FIXME.
+	system 'wget -o .wget-log http://www.isi.edu/in-notes/iana/unidata/Blocks.txt';
+    }
+}
+else
+{
+    $file = $ARGV[0];
+}
+
+open (INPUT, "< $file") || die "couldn't open $file: $!";
+
+@array = ();
+while (<INPUT>)
+{
+    next if /^#/;
+    chop;
+
+    ($start, $to, $text) = split (/; /);
+    ($symbol = $text) =~ tr/a-z/A-Z/;
+    $symbol =~ s/[- ]/_/g;
+
+    # Special case for one of the SPECIALS.
+    next if $start eq 'FEFF';
+
+    printf "    public static final UnicodeBlock %s = new UnicodeBlock (\"%s\", '\\u%s', '\\u%s');\n",
+           $symbol, $text, $start, $to;
+
+    push (@array, $symbol);
+}
+
+printf "    private static final UnicodeBlock[] blocks = {\n";
+foreach (@array)
+{
+    printf "      %s", $_;
+    printf "," unless $_ eq 'SPECIALS';
+    printf "\n";
+}
+printf "    };\n";
+
+close (INPUT);