+added UTF8 support for string manipulation.

core/my_basic.h

@@ -50,6 +50,10 @@ extern "C" {
 #	define MB_ENABLE_SOURCE_TRACE
 #endif /* MB_ENABLE_SOURCE_TRACE */
 
+#ifndef MB_ENABLE_UNICODE
+#	define MB_ENABLE_UNICODE
+#endif /* MB_ENABLE_UNICODE */
+
 #ifndef MB_CONVERT_TO_INT_LEVEL_NONE
 #	define MB_CONVERT_TO_INT_LEVEL_NONE 0
 #endif /* MB_CONVERT_TO_INT_LEVEL_NONE */
@@ -209,6 +213,7 @@ typedef enum mb_error_e {
 	SE_RN_SYNTAX,
 	SE_RN_INVALID_DATA_TYPE,
 	SE_RN_TYPE_NOT_MATCH,
+	SE_RN_INVALID_STRING,
 	SE_RN_ILLEGAL_BOUND,
 	SE_RN_DIMENSION_TOO_MUCH,
 	SE_RN_OPERATION_FAILED,