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-rw-r--r--src/iso8859_4.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/iso8859_4.c b/src/iso8859_4.c
index f3f6ba9..949b7a1 100644
--- a/src/iso8859_4.c
+++ b/src/iso8859_4.c
@@ -2,7 +2,7 @@
iso8859_4.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
- * Copyright (c) 2002-2019 K.Kosako
+ * Copyright (c) 2002-2020 K.Kosako
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -116,7 +116,11 @@ mbc_case_fold(OnigCaseFoldType flag,
return 2;
}
- *lower = ENC_ISO_8859_4_TO_LOWER_CASE(*p);
+ if (CASE_FOLD_IS_NOT_ASCII_ONLY(flag) || ONIGENC_IS_ASCII_CODE(*p))
+ *lower = ENC_ISO_8859_4_TO_LOWER_CASE(*p);
+ else
+ *lower = *p;
+
(*pp)++;
return 1; /* return byte length of converted char to lower */
}