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Annotation of src/usr.bin/window/wwinsline.c, Revision 1.3

1.3     ! downsj      1: /*     $OpenBSD$       */
1.1       deraadt     2: /*     $NetBSD: wwinsline.c,v 1.3 1995/09/28 10:35:36 tls Exp $        */
                      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[] = "@(#)wwinsline.c        8.1 (Berkeley) 6/6/93";
                     43: #else
1.3     ! downsj     44: static char rcsid[] = "$OpenBSD$";
1.1       deraadt    45: #endif
                     46: #endif /* not lint */
                     47:
                     48: #include "ww.h"
                     49:
                     50: wwinsline(w, row)
                     51: register struct ww *w;
                     52: int row;
                     53: {
                     54:        register i;
                     55:        register union ww_char **cpp, **cqq;
                     56:        register union ww_char *cp;
                     57:        int row1, row2;
                     58:        char deleted;
                     59:        int visible;
                     60:
                     61:        /*
                     62:         * Scroll first.
                     63:         */
                     64:        if ((row1 = row) < w->ww_i.t) {
                     65:                row1 = w->ww_i.t;
                     66:                visible = 0;
                     67:        } else
                     68:                visible = 1;
                     69:        if ((row2 = w->ww_b.b) > w->ww_i.b) {
                     70:                row2 = w->ww_i.b;
                     71:        }
                     72:        deleted = wwscroll1(w, row1, row2, -1, visible);
                     73:
                     74:        /*
                     75:         * Fix the buffer.
                     76:         * But leave clearing the last line for wwclreol().
                     77:         */
                     78:        cpp = &w->ww_buf[w->ww_b.b];
                     79:        cqq = cpp - 1;
                     80:        cp = *cqq;
                     81:        for (i = w->ww_b.b - row; --i > 0;)
                     82:                *--cpp = *--cqq;
                     83:        *cqq = cp;
                     84:
                     85:        /*
                     86:         * Now clear the last line.
                     87:         */
                     88:        if (visible)
                     89:                wwclreol1(w, row, w->ww_b.l, deleted);
                     90:        else {
                     91:                cp += w->ww_b.l;
                     92:                for (i = w->ww_b.nc; --i >= 0;)
                     93:                        cp++->c_w = ' ';
                     94:        }
                     95: }