+extern int _PDCLIB_errno;
+
+/* A mechanism for delayed evaluation. (Not sure if this is really necessary, so
+ no detailed documentation on the "why".)
+*/
+int * _PDCLIB_errno_func( void ) _PDCLIB_nothrow;
+
+/* -------------------------------------------------------------------------- */
+/* locale / wchar / uchar */
+/* -------------------------------------------------------------------------- */
+
+#ifndef __cplusplus
+typedef _PDCLIB_int16_t _PDCLIB_char16_t;
+typedef _PDCLIB_int32_t _PDCLIB_char32_t;
+#else
+typedef char16_t _PDCLIB_char16_t;
+typedef char32_t _PDCLIB_char32_t;
+#endif
+
+typedef struct _PDCLIB_mbstate {
+ union {
+ /* Is this the best way to represent this? Is this big enough? */
+ _PDCLIB_uint64_t _St64[15];
+ _PDCLIB_uint32_t _St32[31];
+ _PDCLIB_uint16_t _St16[62];
+ unsigned char _StUC[124];
+ signed char _StSC[124];
+ char _StC [124];
+ };
+
+ 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];
+ };
+} _PDCLIB_mbstate_t;
+
+typedef struct _PDCLIB_charcodec *_PDCLIB_charcodec_t;
+typedef struct _PDCLIB_locale *_PDCLIB_locale_t;
+typedef struct lconv _PDCLIB_lconv_t;
+
+_PDCLIB_size_t _PDCLIB_mb_cur_max( void );