1 /* $NetBSD: wwredrawwin.c,v 1.7 2003/08/07 11:17:44 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[] = "@(#)wwredrawwin.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: wwredrawwin.c,v 1.7 2003/08/07 11:17:44 agc Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include "ww.h" 45 46 void 47 wwredrawwin1(struct ww *w, int row1, int row2, int offset) 48 { 49 int row; 50 int col; 51 unsigned char *smap; 52 union ww_char *buf; 53 char *win; 54 union ww_char *ns; 55 int x; 56 int nchanged; 57 58 for (row = row1; row < row2; row++) { 59 col = w->ww_i.l; 60 ns = wwns[row]; 61 smap = &wwsmap[row][col]; 62 buf = w->ww_buf[row + offset]; 63 win = w->ww_win[row]; 64 nchanged = 0; 65 for (; col < w->ww_i.r; col++) 66 if (*smap++ == w->ww_index && 67 ns[col].c_w != 68 (x = buf[col].c_w ^ win[col] << WWC_MSHIFT)) { 69 nchanged++; 70 ns[col].c_w = x; 71 } 72 if (nchanged > 0) 73 wwtouched[row] |= WWU_TOUCHED; 74 } 75 } 76