merges r29622 from trunk into ruby_1_9_2.

--
* string.c (rb_str_dump): fix expected length. [ruby-core:32935]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30129 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Fri Oct 29 03:04:16 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* string.c (rb_str_dump): fix expected length. [ruby-core:32935]
+
 Thu Oct 21 15:42:01 2010  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* lib/net/telnet.rb (Net::Telnet#close): added.

string.c

@@ -4263,12 +4263,11 @@ rb_str_dump(VALUE str)
 	    }
 	    else {
 		if (u8) {	/* \u{NN} */
-		    char buf[32];
 		    int n = rb_enc_precise_mbclen(p-1, pend, enc);
-		    if (MBCLEN_CHARFOUND_P(n)) {
-			int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
-			sprintf(buf, "%x", cc);
-			len += strlen(buf)+4;
+		    if (MBCLEN_CHARFOUND_P(n-1)) {
+			unsigned int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
+			while (cc >>= 4) len++;
+			len += 5;
 			p += MBCLEN_CHARFOUND_LEN(n)-1;
 			break;
 		    }

test/ruby/test_stringchar.rb

@@ -163,4 +163,19 @@ EOS
     s.delete!("a-z")
     assert_equal("BB", s)
   end
+
+  def test_dump
+    bug3996 = '[ruby-core:32935]'
+    Encoding.list.find_all {|enc| enc.ascii_compatible?}.each do |enc|
+      (0..256).map do |c|
+        begin
+          s = c.chr(enc)
+        rescue RangeError, ArgumentError
+          break
+        else
+          assert_not_match(/\0/, s.dump, bug3996)
+        end
+      end
+    end
+  end
 end

version.h

@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_PATCHLEVEL 83
+#define RUBY_PATCHLEVEL 84
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1