util/StringAPI: add UnsafeCopyStringP()

src/util/StringAPI.hxx

@@ -101,6 +101,19 @@ UnsafeCopyString(char *dest, const char *src)
 	strcpy(dest, src);
 }
 
+gcc_nonnull_all
+static inline char *
+UnsafeCopyStringP(char *dest, const char *src)
+{
+#if defined(WIN32) || defined(__BIONIC__)
+  /* emulate stpcpy() */
+  UnsafeCopyString(dest, src);
+  return dest + StringLength(dest);
+#else
+  return stpcpy(dest, src);
+#endif
+}
+
 /**
  * Checks whether #a and #b are equal.
  */