BSD 4.4 Lite Usr.bin Sources

1 files changed, 123 insertions, 0 deletions

diff --git a/usr.bin/window/wwdelchar.c b/usr.bin/window/wwdelchar.c
new file mode 100644
index 0000000..cd58833
--- /dev/null
+++ b/usr.bin/window/wwdelchar.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Edward Wang at The University of California, Berkeley.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)wwdelchar.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include "ww.h"
+#include "tt.h"
+
+wwdelchar(w, row, col)
+register struct ww *w;
+{
+	register i;
+	int nvis;
+
+	/*
+	 * First, shift the line.
+	 */
+	{
+		register union ww_char *p, *q;
+
+		p = &w->ww_buf[row][col];
+		q = p + 1;
+		for (i = w->ww_b.r - col; --i > 0;)
+			*p++ = *q++;
+		p->c_w = ' ';
+	}
+
+	/*
+	 * If can't see it, just return.
+	 */
+	if (row < w->ww_i.t || row >= w->ww_i.b
+	    || w->ww_i.r <= 0 || w->ww_i.r <= col)
+		return;
+
+	if (col < w->ww_i.l)
+		col = w->ww_i.l;
+
+	/*
+	 * Now find out how much is actually changed, and fix wwns.
+	 */
+	{
+		register union ww_char *buf;
+		register char *win;
+		register union ww_char *ns;
+		register char *smap;
+		char touched;
+
+		nvis = 0;
+		smap = &wwsmap[row][col];
+		for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
+			;
+		if (i >= w->ww_i.r)
+			return;
+		col = i;
+		buf = w->ww_buf[row];
+		win = w->ww_win[row];
+		ns = wwns[row];
+		smap = &wwsmap[row][i];
+		touched = wwtouched[row];
+		for (; i < w->ww_i.r; i++) {
+			if (*smap++ != w->ww_index)
+				continue;
+			touched |= WWU_TOUCHED;
+			if (win[i])
+				ns[i].c_w =
+					buf[i].c_w ^ win[i] << WWC_MSHIFT;
+			else {
+				nvis++;
+				ns[i] = buf[i];
+			}
+		}
+		wwtouched[row] = touched;
+	}
+
+	/*
+	 * Can/Should we use delete character?
+	 */
+	if (tt.tt_delchar != 0 && nvis > (wwncol - col) / 2) {
+		register union ww_char *p, *q;
+
+		xxdelchar(row, col);
+		p = &wwos[row][col];
+		q = p + 1;
+		for (i = wwncol - col; --i > 0;)
+			*p++ = *q++;
+		p->c_w = ' ';
+	}
+}