Release FreeBSD 1.0upstream/1.0.0_cvsrelease/1.0.0_cvs

This commit was manufactured to restore the state of the 1.0-RELEASE image.
Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs.

1 files changed, 202 insertions, 0 deletions

diff --git a/sys/kern/tty_ring.c b/sys/kern/tty_ring.c
new file mode 100644
index 000000000000..f4149e576214
--- /dev/null
+++ b/sys/kern/tty_ring.c
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 1989, 1990, 1991, 1992 William F. Jolitz, TeleMuse
+ * 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 software is a component of "386BSD" developed by 
+ *	William F. Jolitz, TeleMuse.
+ * 4. Neither the name of the developer nor the name "386BSD"
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 
+ * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 
+ * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 
+ * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 
+ * NOT MAKE USE OF THIS WORK.
+ *
+ * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
+ * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 
+ * REFERENCES SUCH AS THE  "PORTING UNIX TO THE 386" SERIES 
+ * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 
+ * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 
+ * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 
+ * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 
+ * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``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 DEVELOPER 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.
+ *
+ *	$Id: tty_ring.c,v 1.2 1993/10/16 15:25:01 rgrimes Exp $
+ */
+
+#include "param.h"
+#include "systm.h"
+#include "buf.h"
+#include "ioctl.h"
+#include "tty.h"
+
+/*
+ * XXX - put this in tty.h someday.
+ */
+size_t rb_write __P((struct ringb *to, char *buf, size_t nfrom));
+
+putc(c, rbp) struct ringb *rbp;
+{
+	char *nxtp;
+
+	/* ring buffer full? */
+	if ( (nxtp = RB_SUCC(rbp, rbp->rb_tl)) == rbp->rb_hd) return (-1);
+
+	/* stuff character */
+	*rbp->rb_tl = c;
+	rbp->rb_tl = nxtp;
+	return(0);
+}
+
+getc(rbp) struct ringb *rbp;
+{
+	u_char c;
+
+	/* ring buffer empty? */
+	if (rbp->rb_hd == rbp->rb_tl) return(-1);
+
+	/* fetch character, locate next character */
+	c = *(u_char *) rbp->rb_hd;
+	rbp->rb_hd = RB_SUCC(rbp, rbp->rb_hd);
+	return (c);
+}
+
+nextc(cpp, rbp) struct ringb *rbp; char **cpp; {
+
+	if (*cpp == rbp->rb_tl) return (0);
+	else {	char *cp;
+		cp = *cpp;
+		*cpp = RB_SUCC(rbp, cp);
+		return(*cp);
+	}
+}
+
+ungetc(c, rbp) struct ringb *rbp;
+{
+	char	*backp;
+
+	/* ring buffer full? */
+	if ( (backp = RB_PRED(rbp, rbp->rb_hd)) == rbp->rb_tl) return (-1);
+	rbp->rb_hd = backp;
+
+	/* stuff character */
+	*rbp->rb_hd = c;
+	return(0);
+}
+
+unputc(rbp) struct ringb *rbp;
+{
+	char	*backp;
+	int c;
+
+	/* ring buffer empty? */
+	if (rbp->rb_hd == rbp->rb_tl) return(-1);
+
+	/* backup buffer and dig out previous character */
+	backp = RB_PRED(rbp, rbp->rb_tl);
+	c = *(u_char *)backp;
+	rbp->rb_tl = backp;
+
+	return(c);
+}
+
+#define	peekc(rbp)	(*(rbp)->rb_hd)
+
+initrb(rbp) struct ringb *rbp; {
+	rbp->rb_hd = rbp->rb_tl = rbp->rb_buf;
+}
+
+/*
+ * Example code for contiguous operations:
+	...
+	nc = RB_CONTIGPUT(&rb);
+	if (nc) {
+	if (nc > 9) nc = 9;
+		bcopy("ABCDEFGHI", rb.rb_tl, nc);
+		rb.rb_tl += nc;
+		rb.rb_tl = RB_ROLLOVER(&rb, rb.rb_tl);
+	}
+	...
+	...
+	nc = RB_CONTIGGET(&rb);
+	if (nc) {
+		if (nc > 79) nc = 79;
+		bcopy(rb.rb_hd, stringbuf, nc);
+		rb.rb_hd += nc;
+		rb.rb_hd = RB_ROLLOVER(&rb, rb.rb_hd);
+		stringbuf[nc] = 0;
+		printf("%s|", stringbuf);
+	}
+	...
+ */
+
+/*
+ * Concatenate ring buffers.
+ */
+catb(from, to)
+	struct ringb *from, *to;
+{
+	size_t nfromleft;
+	size_t nfromright;
+
+	nfromright = RB_CONTIGGET(from);
+	rb_write(to, from->rb_hd, nfromright);
+	from->rb_hd += nfromright;
+	from->rb_hd = RB_ROLLOVER(from, from->rb_hd);
+	nfromleft = RB_CONTIGGET(from);
+	rb_write(to, from->rb_hd, nfromleft);
+	from->rb_hd += nfromleft;
+}
+
+/*
+ * Copy ordinary buffer to ring buffer, return count of what fitted.
+ */
+size_t rb_write(to, buf, nfrom)
+	struct ringb *to;
+	char *buf;
+	size_t nfrom;
+{
+	char *toleft;
+	size_t ntoleft;
+	size_t ntoright;
+
+	ntoright = RB_CONTIGPUT(to);
+	if (nfrom < ntoright) {
+		bcopy(buf, to->rb_tl, nfrom);
+		to->rb_tl += nfrom;
+		return (nfrom);
+	}
+	bcopy(buf, to->rb_tl, ntoright);
+	nfrom -= ntoright;
+	toleft = to->rb_buf;	/* fast RB_ROLLOVER */
+	ntoleft = to->rb_hd - toleft;	/* fast RB_CONTIGPUT */
+	if (nfrom > ntoleft)
+		nfrom = ntoleft;
+	bcopy(buf + ntoright, toleft, nfrom);
+	to->rb_tl = toleft + nfrom;
+	return (ntoright + nfrom);
+}