lib/curses/werase.c

   1 #include <curses.h>
   2 #include "curspriv.h"
   3
   4 /****************************************************************/
   5 /* Werase() fills all lines of window 'win' with blanks and po- */
   6 /* Sitions the cursor at home in the scroll region.             */
   7 /****************************************************************/
   8
   9 void werase(win)
  10 WINDOW *win;
  11 {
  12   int *end, *start, y, blank;
  13
  14   blank = ' ' | (win->_attrs & ATR_MSK);
  15
  16   for (y = win->_regtop; y <= win->_regbottom; y++) {   /* clear all lines */
  17         start = win->_line[y];
  18         end = &start[win->_maxx];
  19         while (start <= end)    /* clear all line */
  20                 *start++ = blank;
  21         win->_minchng[y] = 0;
  22         win->_maxchng[y] = win->_maxx;
  23   }
  24   win->_cury = win->_regtop;    /* cursor home */
  25   win->_curx = 0;
  26 }