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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Thomas E. Dickey <dickey@clark.net> 1997 *
31 ****************************************************************************/
36 * The routine wredrawln().
40 #include <curses.priv.h>
42 MODULE_ID("$Id: lib_redrawln.c,v 1.2 1998/02/11 12:13:57 tom Exp $")
44 int wredrawln(WINDOW *win, int beg, int num)
48 T((T_CALLED("wredrawln(%p,%d,%d)"), win, beg, num));
50 if (touchline(win, beg, num) == OK) {
51 size_t len = win->_maxx * sizeof(chtype);
54 * XSI says that wredrawln() tells the library not to base
55 * optimization on the contents of the lines that are marked.
56 * We do that by changing the contents to nulls after touching
57 * the corresponding lines to get the optimizer's attention.
59 * FIXME: this won't work if the application makes further
60 * updates before the next refresh.
62 for (i = beg; (i < beg + num) && (i < win->_maxy); i++) {
63 memset(win->_line[i].text, 0, len);