Make mvcur() a weak symbol where supported

1 files changed, 127 insertions, 0 deletions

diff --git a/lib/libtermlib/_mvcur.c b/lib/libtermlib/_mvcur.c
new file mode 100644
index 00000000000..848337a20ff
--- /dev/null
+++ b/lib/libtermlib/_mvcur.c
@@ -0,0 +1,127 @@
+/*	$OpenBSD: _mvcur.c,v 1.1 1996/10/12 03:08:25 tholo Exp $	*/
+
+/*
+ * Copyright (c) 1996 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
+ * All rights reserved.
+ *
+ * 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 SigmaSoft, Th.  Lockert.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 rcsid[] = "$OpenBSD: _mvcur.c,v 1.1 1996/10/12 03:08:25 tholo Exp $";
+#endif
+
+#include <string.h>
+#include <unistd.h>
+#include <termios.h>
+#include "term.h"
+
+static int
+rawmode()
+{
+    struct termios ti;
+
+    if (tcgetattr(STDIN_FILENO, &ti) < 0)
+	return 1;
+    if (ti.c_oflag & OPOST)
+	if (ti.c_oflag & ONLCR)
+	    return 0;
+    return 1;
+}
+
+/*
+ * Optimized cursor movement, assume cursor is currently
+ * located at (oldx,oldy), output what is needed for the
+ * cursor to be relocated to (newx,newy)
+ */
+int
+_mvcur(oldy, oldx, newy, newx)
+    int oldy;
+    int oldx;
+    int newy;
+    int newx;
+{
+    int l, c, raw;
+    char *p;
+
+    if (newx >= columns) {
+	newy += newx / columns;
+	newx %= columns;
+    }
+    if (oldx >= columns) {
+	l = (oldx + 1) / columns;
+	oldy += l;
+	oldx %= columns;
+	if (!auto_right_margin) {
+	    raw = rawmode();
+	    while (l > 0) {
+		if (raw)
+		    if (carriage_return != NULL)
+			tputs(carriage_return, 0, _ti_outc);
+		    else
+			_ti_outc('\r');
+		if (linefeed_if_not_lf != NULL)
+		    tputs(linefeed_if_not_lf, 0, _ti_outc);
+		else
+		    _ti_outc('\n');
+		l--;
+	    }
+	    oldx = 0;
+	}
+	if (oldy >= lines - 1) {
+	    newy -= oldy - (lines - 1);
+	    oldy = lines - 1;
+	}
+    }
+    if (newy >= lines) {
+	l = newy;
+	newy = lines - 1;
+	if (oldy < lines - 1) {
+	    c = newx;
+	    if (cursor_address == NULL)
+		newx = 0;
+	    mvcur(oldy, oldx, newy, newx);
+	    newx = c;
+	}
+	while (l >= lines) {
+	    if (linefeed_if_not_lf != NULL)
+		tputs(linefeed_if_not_lf, 0, _ti_outc);
+	    else
+		_ti_outc('\n');
+	    l--;
+	    oldx = 0;
+	}
+    }
+    if (newy < oldy && !(cursor_address != NULL || cursor_up != NULL))
+	newy = oldy;
+    if (cursor_address != NULL) {
+	p = tparm(cursor_address, newx, newy);
+	tputs(p, 0, _ti_outc);
+    }
+    else
+	return ERR;
+    return OK;
+}