+int format_arrow_key(char *buf, Terminal *term, int xkey, int ctrl)
+{
+ char *p = buf;
+
+ if (term->vt52_mode)
+ p += sprintf((char *) p, "\x1B%c", xkey);
+ else {
+ int app_flg = (term->app_cursor_keys && !term->cfg.no_applic_c);
+#if 0
+ /*
+ * RDB: VT100 & VT102 manuals both state the app cursor
+ * keys only work if the app keypad is on.
+ *
+ * SGT: That may well be true, but xterm disagrees and so
+ * does at least one application, so I've #if'ed this out
+ * and the behaviour is back to PuTTY's original: app
+ * cursor and app keypad are independently switchable
+ * modes. If anyone complains about _this_ I'll have to
+ * put in a configurable option.
+ */
+ if (!term->app_keypad_keys)
+ app_flg = 0;
+#endif
+ /* Useful mapping of Ctrl-arrows */
+ if (ctrl)
+ app_flg = !app_flg;
+
+ if (app_flg)
+ p += sprintf((char *) p, "\x1BO%c", xkey);
+ else
+ p += sprintf((char *) p, "\x1B[%c", xkey);
+ }
+
+ return p - buf;
+}
+