* enc/trans/utf_16_32.trans: raise error on unpaired upper

  surrogates.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29891 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 8 deletions

diff --git a/enc/trans/utf_16_32.trans b/enc/trans/utf_16_32.trans
index 4b1eca796d..2d7005993e 100644
--- a/enc/trans/utf_16_32.trans
+++ b/enc/trans/utf_16_32.trans
@@ -289,20 +289,20 @@ fun_si_from_utf_16(void *statep, const unsigned char *s, size_t l)
         }
         break;
     case BE:
-        if (0xD8 <= s[0] && s[0] <= 0xDB) {
-            return (VALUE)from_UTF_16BE_D8toDB_00toFF;
-        }
-        else {
+        if (s[0] < 0xD8 && 0xDF < s[0]) {
             return (VALUE)FUNso;
         }
+        else if (s[0] <= 0xDB) {
+            return (VALUE)from_UTF_16BE_D8toDB_00toFF;
+        }
         break;
     case LE:
-        if (0xD8 <= s[1] && s[1] <= 0xDB) {
-            return (VALUE)from_UTF_16LE_00toFF_D8toDB;
-        }
-        else {
+        if (s[1] < 0xD8 && 0xDF < s[1]) {
             return (VALUE)FUNso;
         }
+        else if (s[1] <= 0xDB) {
+            return (VALUE)from_UTF_16LE_00toFF_D8toDB;
+        }
         break;
     }
     return (VALUE)INVALID;