overwrite.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#ifndef lint
static char
sccsid[] = "@(#)overwrite.c 1.7 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
#endif /* not lint */
#include "curses.ext"
#include <ctype.h>
#include <string.h>
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
/*
* This routine writes win1 on win2 destructively.
*/
int
overwrite(WINDOW *win1, WINDOW *win2)
{
int x, y, endy, endx, starty, startx;
#ifdef DEBUG
fprintf(outf, "OVERWRITE(%0.2o, %0.2o);\n", win1, win2);
#endif
starty = max(win1->_begy, win2->_begy);
startx = max(win1->_begx, win2->_begx);
endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
if (starty >= endy || startx >= endx)
return (OK);
#ifdef DEBUG
fprintf(outf, "OVERWRITE:from (%d,%d) to (%d,%d)\n",
starty, startx, endy, endx);
#endif
x = endx - startx;
for (y = starty; y < endy; y++) {
(void) memmove(&win2->_y[y - win2->_begy][startx - win2->_begx],
&win1->_y[y - win1->_begy][startx - win1->_begx], x);
(void) touchline(win2, y, startx - win2->_begx,
endx - win2->_begx);
}
return (OK);
}