sprintf.c: coderange fix

* sprintf.c (ruby__sfvwrite): set buffer length and exclude
  uninitialized garbage to get correct coderange.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36706 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,14 @@
+Wed Aug 15 16:23:35 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* sprintf.c (ruby__sfvwrite): set buffer length and exclude
+	  uninitialized garbage to get correct coderange.
+
+	* sprintf.c (ruby__sfvextra): the result should be infected by the
+	  given strings.
+
+	* sprintf.c (ruby__sfvwrite): set buffer length and exclude
+	  uninitialized garbage to get correct coderange.
+
 Wed Aug 15 16:20:09 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* common.mk (ID_H_TARGET): make timestamp file of id.h so that the

sprintf.c

@@ -1174,6 +1174,7 @@ ruby__sfvwrite(register rb_printf_buffer *fp, register struct __suio *uio)
 	len -= n;
     }
     fp->_p = (unsigned char *)buf;
+    rb_str_set_len(result, buf - RSTRING_PTR(result));
     return 0;
 }
 

test/-ext-/test_printf.rb

@@ -21,4 +21,11 @@ class Test_SPrintf < Test::Unit::TestCase
   def test_inspect
     assert_equal("{<#{self.class}:#{object_id}>}", Bug::Printf.v(self))
   end
+
+  def test_encoding
+    def self.to_s
+      "\u{3042 3044 3046 3048 304a}"
+    end
+    assert_equal("<\u{3042 3044 3046 3048 304a}>", Bug::Printf.s(self))
+  end
 end