355 static char *xstring, *xestring;  variable
359     if (xestring == xstring)  in xaddchar()
360 	*xstring = '\0';  in xaddchar()
362 	*xstring++ = (char) c;  in xaddchar()
374     xstring = str;  in xsnprintf()
378     *xstring++ = '\0';  in xsnprintf()
404     xstring = str;  in xvsnprintf()
407     *xstring++ = '\0';  in xvsnprintf()
423 	xstring = buf;  in xvasprintf()
428 	if (xstring < xestring)  in xvasprintf()
432     *xstring++ = '\0';  in xvasprintf()
433     return xrealloc(buf, xstring - buf);  in xvasprintf()