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Annotation of src/usr.bin/window/wwinsline.c, Revision 1.5

1.5     ! millert     1: /*     $OpenBSD: wwinsline.c,v 1.4 2001/11/19 19:02:18 mpech Exp $     */
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.
1.5     ! millert    19:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #ifndef lint
                     37: #if 0
                     38: static char sccsid[] = "@(#)wwinsline.c        8.1 (Berkeley) 6/6/93";
                     39: #else
1.5     ! millert    40: static char rcsid[] = "$OpenBSD: wwinsline.c,v 1.4 2001/11/19 19:02:18 mpech Exp $";
1.1       deraadt    41: #endif
                     42: #endif /* not lint */
                     43:
                     44: #include "ww.h"
                     45:
                     46: wwinsline(w, row)
1.4       mpech      47: struct ww *w;
1.1       deraadt    48: int row;
                     49: {
1.4       mpech      50:        int i;
                     51:        union ww_char **cpp, **cqq;
                     52:        union ww_char *cp;
1.1       deraadt    53:        int row1, row2;
                     54:        char deleted;
                     55:        int visible;
                     56:
                     57:        /*
                     58:         * Scroll first.
                     59:         */
                     60:        if ((row1 = row) < w->ww_i.t) {
                     61:                row1 = w->ww_i.t;
                     62:                visible = 0;
                     63:        } else
                     64:                visible = 1;
                     65:        if ((row2 = w->ww_b.b) > w->ww_i.b) {
                     66:                row2 = w->ww_i.b;
                     67:        }
                     68:        deleted = wwscroll1(w, row1, row2, -1, visible);
                     69:
                     70:        /*
                     71:         * Fix the buffer.
                     72:         * But leave clearing the last line for wwclreol().
                     73:         */
                     74:        cpp = &w->ww_buf[w->ww_b.b];
                     75:        cqq = cpp - 1;
                     76:        cp = *cqq;
                     77:        for (i = w->ww_b.b - row; --i > 0;)
                     78:                *--cpp = *--cqq;
                     79:        *cqq = cp;
                     80:
                     81:        /*
                     82:         * Now clear the last line.
                     83:         */
                     84:        if (visible)
                     85:                wwclreol1(w, row, w->ww_b.l, deleted);
                     86:        else {
                     87:                cp += w->ww_b.l;
                     88:                for (i = w->ww_b.nc; --i >= 0;)
                     89:                        cp++->c_w = ' ';
                     90:        }
                     91: }