--- /dev/null
+/* wchar_t * wcsncpy( wchar_t restrict *, const wchar_t restrict * , size_t );\r
+\r
+ This file is part of the Public Domain C Library (PDCLib).\r
+ Permission is granted to use, modify, and / or redistribute at will.\r
+*/\r
+\r
+#include <wchar.h>\r
+\r
+#ifndef REGTEST\r
+\r
+wchar_t *wcsncpy( wchar_t * _PDCLIB_restrict s1, \r
+ const wchar_t * _PDCLIB_restrict s2,\r
+ size_t n )\r
+{\r
+ wchar_t * rc = s1;\r
+ while ( ( n > 0 ) && ( *s1++ = *s2++ ) )\r
+ {\r
+ /* Cannot do "n--" in the conditional as size_t is unsigned and we have\r
+ to check it again for >0 in the next loop below, so we must not risk\r
+ underflow.\r
+ */\r
+ --n;\r
+ }\r
+ /* Checking against 1 as we missed the last --n in the loop above. */\r
+ while ( n-- > 1 )\r
+ {\r
+ *s1++ = '\0';\r
+ }\r
+ return rc;\r
+}\r
+\r
+\r
+#endif\r
+\r
+#ifdef TEST\r
+#include <_PDCLIB_test.h>\r
+\r
+int main( void )\r
+{\r
+ return TEST_RESULTS;\r
+}\r
+\r
+#endif\r