util/StringAPI: add UnsafeCopyStringP()

src/util/WStringAPI.hxx

@@ -97,6 +97,19 @@ UnsafeCopyString(wchar_t *dest, const wchar_t *src)
 	wcscpy(dest, src);
 }
 
+gcc_nonnull_all
+static inline wchar_t *
+UnsafeCopyStringP(wchar_t *dest, const wchar_t *src)
+{
+#if defined(WIN32) || defined(__BIONIC__)
+  /* emulate wcpcpy() */
+  UnsafeCopyString(dest, src);
+  return dest + StringLength(dest);
+#else
+  return wcpcpy(dest, src);
+#endif
+}
+
 /**
  * Checks whether str1 and str2 are equal.
  * @param str1 String 1