- union {
- /* c16/related functions: Surrogate storage
- *
- * If zero, no surrogate pending. If nonzero, surrogate.
- */
- _PDCLIB_uint16_t _Surrogate;
-
- /* Reserved for potential mbtoutf8/etc functions */
- unsigned char _U8[4];
- };
+ /* c16/related functions: Surrogate storage
+ *
+ * If zero, no surrogate pending. If nonzero, surrogate.
+ */
+ _PDCLIB_uint16_t _Surrogate;
+
+ /* In cases where the underlying codec is capable of regurgitating a
+ * character without consuming any extra input (e.g. a surrogate pair in a
+ * UCS-4 to UTF-16 conversion) then these fields are used to track that
+ * state. In particular, they are used to buffer/fake the input for mbrtowc
+ * and similar functions.
+ *
+ * See _PDCLIB_encoding.h for values of _PendState and the resultant value
+ * in _PendChar.
+ */
+ unsigned char _PendState;
+ char _PendChar;