* pack.c (pack_pack): 'u0' is not special differently from 'm0'.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20564 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sat Dec  6 17:51:35 2008  Yuki Sonoda (Yugui)  <yugui@yugui.jp>
+
+	* pack.c (pack_pack): 'u0' is not special differently from 'm0'.
+
 Sat Dec  6 14:35:06 2008  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* pack.c (pack_pack): set US-ASCII and CODERANGE_7BIT

pack.c

@@ -901,7 +901,7 @@ pack_pack(VALUE ary, VALUE fmt)
 	    ptr = RSTRING_PTR(from);
 	    plen = RSTRING_LEN(from);
 
-	    if (len == 0) {
+	    if (len == 0 && type == 'm') {
 		encodes(res, ptr, plen, type, 0);
 		ptr += plen;
 		break;

test/ruby/test_pack.rb

@@ -349,6 +349,10 @@ class TestPack < Test::Unit::TestCase
     assert_equal("M86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A\n!80``\n", ["a"*46].pack("u"))
     assert_equal("&86)C9&5F\n#9VAI\n", ["abcdefghi"].pack("u6"))
 
+    assert_equal("M86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A\n!80``\n", ["a"*46].pack("u0"))
+    assert_equal("M86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A\n!80``\n", ["a"*46].pack("u1"))
+    assert_equal("M86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A86%A\n!80``\n", ["a"*46].pack("u2"))
+
     assert_equal([""], "".unpack("u"))
     assert_equal(["a"], "!80``\n".unpack("u"))
     assert_equal(["abc"], "#86)C\n".unpack("u"))