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Annotation of src/usr.bin/window/wwredrawwin.c, Revision 1.4

1.4     ! downsj      1: /*     $OpenBSD$       */
1.2       niklas      2: /*     $NetBSD: wwredrawwin.c,v 1.4 1996/02/08 21:49:15 mycroft Exp $  */
1.1       deraadt     3:
                      4: /*
                      5:  * Copyright (c) 1983, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Edward Wang at The University of California, Berkeley.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the University of
                     22:  *     California, Berkeley and its contributors.
                     23:  * 4. Neither the name of the University nor the names of its contributors
                     24:  *    may be used to endorse or promote products derived from this software
                     25:  *    without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     28:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     29:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     30:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     31:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     32:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     33:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     34:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     35:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     36:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     37:  * SUCH DAMAGE.
                     38:  */
                     39:
                     40: #ifndef lint
                     41: #if 0
                     42: static char sccsid[] = "@(#)wwredrawwin.c      8.1 (Berkeley) 6/6/93";
                     43: #else
1.4     ! downsj     44: static char rcsid[] = "$OpenBSD$";
1.1       deraadt    45: #endif
                     46: #endif /* not lint */
                     47:
                     48: #include "ww.h"
                     49:
                     50: wwredrawwin1(w, row1, row2, offset)
                     51: register struct ww *w;
                     52: int row1, row2, offset;
                     53: {
                     54:        int row;
                     55:        register col;
1.2       niklas     56:        register unsigned char *smap;
1.1       deraadt    57:        register union ww_char *buf;
                     58:        register char *win;
                     59:        register union ww_char *ns;
                     60:        int x;
                     61:        int nchanged;
                     62:
                     63:        for (row = row1; row < row2; row++) {
                     64:                col = w->ww_i.l;
                     65:                ns = wwns[row];
                     66:                smap = &wwsmap[row][col];
                     67:                buf = w->ww_buf[row + offset];
                     68:                win = w->ww_win[row];
                     69:                nchanged = 0;
                     70:                for (; col < w->ww_i.r; col++)
                     71:                        if (*smap++ == w->ww_index &&
                     72:                            ns[col].c_w !=
                     73:                            (x = buf[col].c_w ^ win[col] << WWC_MSHIFT)) {
                     74:                                nchanged++;
                     75:                                ns[col].c_w = x;
                     76:                        }
                     77:                if (nchanged > 0)
                     78:                        wwtouched[row] |= WWU_TOUCHED;
                     79:        }
                     80: }