win32/registry.rb: size in bytes

* ext/win32/lib/win32/registry.rb (Win32::Registry#write): data size
  is in bytes, not chars.  terminators should be placed automatically.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43031 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Sep 24 16:41:15 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/win32/lib/win32/registry.rb (Win32::Registry#write): data size
+	  is in bytes, not chars.  terminators should be placed automatically.
+
 Tue Sep 24 16:39:36 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/win32/lib/win32/registry.rb (Win32::Registry#each_value): encode

ext/win32/lib/win32/registry.rb

@@ -725,11 +725,14 @@ For detail, see the MSDN[http://msdn.microsoft.com/library/en-us/sysinfo/base/pr
     # method returns.
     #
     def write(name, type, data)
+      termsize = 0
       case type
       when REG_SZ, REG_EXPAND_SZ
-        data = data.to_s + "\0"
+        data = data.encode(WCHAR)
+        termsize = WCHAR_SIZE
       when REG_MULTI_SZ
-        data = data.to_a.join("\0") + "\0\0"
+        data = data.to_a.map {|s| s.encode(WCHAR)}.join(WCHAR_NUL) << WCHAR_NUL
+        termsize = WCHAR_SIZE
       when REG_BINARY
         data = data.to_s
       when REG_DWORD
@@ -741,7 +744,7 @@ For detail, see the MSDN[http://msdn.microsoft.com/library/en-us/sysinfo/base/pr
       else
         raise TypeError, "Unsupported type #{type}"
       end
-      API.SetValue(@hkey, name, type, data, data.length)
+      API.SetValue(@hkey, name, type, data, data.bytesize + termsize)
     end
 
     #