usr/src/lib/libcurses/overwrite.c

# include       "curses.h"

# define        min(a,b)        (a < b ? a : b)

/*
 *      This routine writes win1 on win2 destructively.
 *
 * 1/26/81 (Berkeley) @(#)overwrite.c   1.1
 */
overwrite(win1, win2)
reg WINDOW      *win1, *win2; {

        reg int         x, y, minx, miny, starty;

# ifdef DEBUG
        fprintf(outf, "OVERWRITE(0%o, 0%o);\n", win1, win2);
# endif
        miny = min(win1->_maxy, win2->_maxy);
        minx = min(win1->_maxx, win2->_maxx);
# ifdef DEBUG
        fprintf(outf, "OVERWRITE:\tminx = %d,  miny = %d\n", minx, miny);
# endif
        starty = win1->_begy - win2->_begy;
        for (y = 0; y < miny; y++)
                if (wmove(win2, y + starty, 0) != ERR)
                        for (x = 0; x < minx; x++)
                                waddch(win2, win1->_y[y][x]);
}