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Annotation of src/usr.bin/window/wwclreol.c, Revision 1.2

1.2     ! niklas      1: /*     $NetBSD: wwclreol.c,v 1.4 1996/02/08 21:48:58 mycroft Exp $     */
1.1       deraadt     2:
                      3: /*
                      4:  * Copyright (c) 1983, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to Berkeley by
                      8:  * Edward Wang at The University of California, Berkeley.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  */
                     38:
                     39: #ifndef lint
                     40: #if 0
                     41: static char sccsid[] = "@(#)wwclreol.c 8.1 (Berkeley) 6/6/93";
                     42: #else
1.2     ! niklas     43: static char rcsid[] = "$NetBSD: wwclreol.c,v 1.4 1996/02/08 21:48:58 mycroft Exp $";
1.1       deraadt    44: #endif
                     45: #endif /* not lint */
                     46:
                     47: #include "ww.h"
                     48: #include "tt.h"
                     49:
                     50: /*
                     51:  * Clear w to the end of line.
                     52:  * If cleared is true, then the screen line has already been cleared.
                     53:  */
                     54: wwclreol1(w, row, col, cleared)
                     55: register struct ww *w;
                     56: int row, col;
                     57: char cleared;
                     58: {
                     59:        register i;
                     60:
                     61:        /*
                     62:         * Clear the buffer right off
                     63:         */
                     64:        {
                     65:                register union ww_char *buf;
                     66:
                     67:                buf = &w->ww_buf[row][col];
                     68:                for (i = w->ww_b.r - col; --i >= 0;)
                     69:                        buf++->c_w = ' ';
                     70:        }
                     71:
                     72:        /*
                     73:         * If can't see it, just return.
                     74:         */
                     75:        if (row < w->ww_i.t || row >= w->ww_i.b
                     76:            || w->ww_i.r <= 0 || w->ww_i.r <= col)
                     77:                return;
                     78:
                     79:        if (col < w->ww_i.l)
                     80:                col = w->ww_i.l;
                     81:
                     82:        /*
                     83:         * Now fix wwns.
                     84:         */
                     85:        {
                     86:                register union ww_char *s;
1.2     ! niklas     87:                register unsigned char *smap;
        !            88:                register char *win;
1.1       deraadt    89:
                     90:                i = col;
                     91:                smap = &wwsmap[row][i];
                     92:                s = &wwns[row][i];
                     93:                win = &w->ww_win[row][i];
                     94:                for (i = w->ww_i.r - i; --i >= 0;)
                     95:                        if (*smap++ == w->ww_index)
                     96:                                s++->c_w = ' ' | *win++ << WWC_MSHIFT;
                     97:                        else
                     98:                                s++, win++;
                     99:        }
                    100:        if (!cleared)
                    101:                wwtouched[row] |= WWU_TOUCHED;
                    102: }