refix through 52016,52017,52019,52020 [Bug #11486]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52021 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 3 deletions

diff --git a/enc/euc_jp.c b/enc/euc_jp.c
index 4121750b8d..7922aac150 100644
--- a/enc/euc_jp.c
+++ b/enc/euc_jp.c
@@ -378,12 +378,13 @@ mbc_case_fold(OnigCaseFoldType flag,
     return 1;
   }
   else {
+    OnigCodePoint code;
     int len;
 
     len = mbc_enc_len(p, end, enc);
-    if (len <= 0) return 1;
-    get_lower_case(mbc_to_code(p, end, enc));
-    /* assuming case folding in euc-jp doesn't change length */
+    code = get_lower_case(mbc_to_code(p, end, enc));
+    len = code_to_mbc(code, lower, enc);
+    if (len == ONIGERR_INVALID_CODE_POINT_VALUE) len = 1;
     (*pp) += len;
     return len; /* return byte length of converted char to lower */
   }