- if (win && (orig = win->_parent)) {
- if (win->_parx == x && win->_pary == y)
- returnCode(OK);
- if (x < 0 || y < 0)
- returnCode(ERR);
- if ((x + getmaxx(win) > getmaxx(orig)) ||
- (y + getmaxy(win) > getmaxy(orig)))
- returnCode(ERR);
- } else
- returnCode(ERR);
- wsyncup(win);
- win->_parx = x;
- win->_pary = y;
- for (i = 0; i < getmaxy(win); i++)
- win->_line[i].text = &(orig->_line[y++].text[x]);
- returnCode(OK);
+ if (win != 0
+ && (orig = win->_parent) != 0
+ && (x >= 0 && y >= 0)
+ && (x + getmaxx(win) <= getmaxx(orig))
+ && (y + getmaxy(win) <= getmaxy(orig))) {
+ wsyncup(win);
+ win->_parx = x;
+ win->_pary = y;
+ for (i = 0; i < getmaxy(win); i++)
+ win->_line[i].text = &(orig->_line[y++].text[x]);
+ rc = OK;
+ }
+ returnCode(rc);