1 /* $NetBSD: wwinsline.c,v 1.6 2003/08/07 11:17:40 agc Exp $ */ 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)wwinsline.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: wwinsline.c,v 1.6 2003/08/07 11:17:40 agc Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include "ww.h" 45 46 void 47 wwinsline(struct ww *w, int row) 48 { 49 int i; 50 union ww_char **cpp, **cqq; 51 union ww_char *cp; 52 int row1, row2; 53 char deleted; 54 int visible; 55 56 /* 57 * Scroll first. 58 */ 59 if ((row1 = row) < w->ww_i.t) { 60 row1 = w->ww_i.t; 61 visible = 0; 62 } else 63 visible = 1; 64 if ((row2 = w->ww_b.b) > w->ww_i.b) { 65 row2 = w->ww_i.b; 66 } 67 deleted = wwscroll1(w, row1, row2, -1, visible); 68 69 /* 70 * Fix the buffer. 71 * But leave clearing the last line for wwclreol(). 72 */ 73 cpp = &w->ww_buf[w->ww_b.b]; 74 cqq = cpp - 1; 75 cp = *cqq; 76 for (i = w->ww_b.b - row; --i > 0;) 77 *--cpp = *--cqq; 78 *cqq = cp; 79 80 /* 81 * Now clear the last line. 82 */ 83 if (visible) 84 wwclreol1(w, row, w->ww_b.l, deleted); 85 else { 86 cp += w->ww_b.l; 87 for (i = w->ww_b.nc; --i >= 0;) 88 cp++->c_w = ' '; 89 } 90 } 91