BSD 4.4 Lite Usr.bin Sources

1 files changed, 146 insertions, 0 deletions

diff --git a/usr.bin/window/ttoutput.c b/usr.bin/window/ttoutput.c
new file mode 100644
index 0000000..5c582d6
--- /dev/null
+++ b/usr.bin/window/ttoutput.c
@@ -0,0 +1,146 @@
+/*
+ * 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[] = "@(#)ttoutput.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include "ww.h"
+#include "tt.h"
+#include <sys/errno.h>
+
+/*
+ * Buffered output package.
+ * We need this because stdio fails on non-blocking writes.
+ */
+
+ttflush()
+{
+	register char *p;
+	register n = tt_obp - tt_ob;
+	extern errno;
+
+	if (n == 0)
+		return;
+	if (tt.tt_checksum)
+		(*tt.tt_checksum)(tt_ob, n);
+	if (tt.tt_flush) {
+		(*tt.tt_flush)();
+		return;
+	}
+	wwnflush++;
+	for (p = tt_ob; p < tt_obp;) {
+		wwnwr++;
+		n = write(1, p, tt_obp - p);
+		if (n < 0) {
+			wwnwre++;
+			if (errno != EWOULDBLOCK) {
+				/* can't deal with this */
+				p = tt_obp;
+			}
+		} else if (n == 0) {
+			/* what to do? */
+			wwnwrz++;
+		} else {
+			wwnwrc += n;
+			p += n;
+		}
+	}
+	tt_obp = tt_ob;
+}
+
+ttputs(s)
+register char *s;
+{
+	while (*s)
+		ttputc(*s++);
+}
+
+ttwrite(s, n)
+	register char *s;
+	register n;
+{
+	switch (n) {
+	case 0:
+		break;
+	case 1:
+		ttputc(*s);
+		break;
+	case 2:
+		if (tt_obe - tt_obp < 2)
+			ttflush();
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s;
+		break;
+	case 3:
+		if (tt_obe - tt_obp < 3)
+			ttflush();
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s;
+		break;
+	case 4:
+		if (tt_obe - tt_obp < 4)
+			ttflush();
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s;
+		break;
+	case 5:
+		if (tt_obe - tt_obp < 5)
+			ttflush();
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s++;
+		*tt_obp++ = *s;
+		break;
+	default:
+		while (n > 0) {
+			register m;
+
+			while ((m = tt_obe - tt_obp) == 0)
+				ttflush();
+			if ((m = tt_obe - tt_obp) > n)
+				m = n;
+			bcopy(s, tt_obp, m);
+			tt_obp += m;
+			s += m;
+			n -= m;
+		}
+	}
+}