1 files changed, 284 insertions, 0 deletions
diff --git a/usr.bin/vi/ex/ex_args.c b/usr.bin/vi/ex/ex_args.c
new file mode 100644
index 000000000000..e035704a4a29
--- /dev/null
+++ b/usr.bin/vi/ex/ex_args.c
@@ -0,0 +1,284 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  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 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[] = "@(#)ex_args.c	8.16 (Berkeley) 3/14/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <queue.h>
+#include <sys/time.h>
+
+#include <bitstring.h>
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+
+#include <db.h>
+#include <regex.h>
+
+#include "vi.h"
+#include "excmd.h"
+
+/*
+ * ex_next -- :next [files]
+ *	Edit the next file, optionally setting the list of files.
+ *
+ * !!!
+ * The :next command behaved differently from the :rewind command in
+ * historic vi.  See nvi/docs/autowrite for details, but the basic
+ * idea was that it ignored the force flag if the autowrite flag was
+ * set.  This implementation handles them all identically.
+ */
+int
+ex_next(sp, ep, cmdp)
+	SCR *sp;
+	EXF *ep;
+	EXCMDARG *cmdp;
+{
+	ARGS **argv;
+	FREF *frp;
+	char *name;
+
+	MODIFY_RET(sp, ep, F_ISSET(cmdp, E_FORCE));
+
+	if (cmdp->argc) {
+		/* Mark all the current files as ignored. */
+		for (frp = sp->frefq.cqh_first;
+		    frp != (FREF *)&sp->frefq; frp = frp->q.cqe_next)
+			F_SET(frp, FR_IGNORE);
+
+		/* Add the new files into the file list. */
+		for (argv = cmdp->argv; argv[0]->len != 0; ++argv)
+			if (file_add(sp, NULL, argv[0]->bp, 0) == NULL)
+				return (1);
+
+		if ((frp = file_first(sp)) == NULL)
+			return (1);
+	} else if ((frp = file_next(sp, sp->a_frp)) == NULL) {
+		msgq(sp, M_ERR, "No more files to edit.");
+		return (1);
+	}
+
+	/*
+	 * There's a tricky sequence, where the user edits two files, e.g.
+	 * "x" and "y".  While in "x", they do ":e y|:f foo", which changes
+	 * the name of that FRP entry.  Then, the :n command finds the file
+	 * "y" with a name change.  If the file name has been changed, get
+	 * a new FREF for the original file name, and make it be the one that
+	 * is displayed in the argument list, not the one with the name change.
+	 */
+	if (frp->cname != NULL) {
+		F_SET(frp, FR_IGNORE);
+		name = frp->name == NULL ? frp->tname : frp->name;
+		if ((frp = file_add(sp, sp->a_frp, name, 0)) == NULL)
+			return (1);
+	}
+	if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
+		return (1);
+	sp->a_frp = frp;
+	F_SET(sp, S_FSWITCH);
+	return (0);
+}
+
+/*
+ * ex_prev -- :prev
+ *	Edit the previous file.
+ */
+int
+ex_prev(sp, ep, cmdp)
+	SCR *sp;
+	EXF *ep;
+	EXCMDARG *cmdp;
+{
+	FREF *frp;
+	char *name;
+
+	MODIFY_RET(sp, ep, F_ISSET(cmdp, E_FORCE));
+
+	if ((frp = file_prev(sp, sp->a_frp)) == NULL) {
+		msgq(sp, M_ERR, "No previous files to edit.");
+		return (1);
+	}
+
+	/* See comment in ex_next(). */
+	if (frp->cname != NULL) {
+		F_SET(frp, FR_IGNORE);
+		name = frp->name == NULL ? frp->tname : frp->name;
+		if ((frp = file_add(sp, frp, name, 0)) == NULL)
+			return (1);
+	}
+	if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
+		return (1);
+	sp->a_frp = frp;
+	F_SET(sp, S_FSWITCH);
+	return (0);
+}
+
+/*
+ * ex_rew -- :rew
+ *	Re-edit the list of files.
+ */
+int
+ex_rew(sp, ep, cmdp)
+	SCR *sp;
+	EXF *ep;
+	EXCMDARG *cmdp;
+{
+	FREF *frp, *tfrp;
+
+	/*
+	 * !!!
+	 * Historic practice -- you can rewind to the current file.
+	 */
+	if ((frp = file_first(sp)) == NULL) {
+		msgq(sp, M_ERR, "No previous files to rewind.");
+		return (1);
+	}
+
+	MODIFY_RET(sp, ep, F_ISSET(cmdp, E_FORCE));
+
+	/*
+	 * !!!
+	 * Historic practice, turn off the edited bit.  The :next and :prev
+	 * code will discard any name changes, so ignore them here.  Start
+	 * at the beginning of the file, too.
+	 */
+	for (tfrp = sp->frefq.cqh_first;
+	    tfrp != (FREF *)&sp->frefq; tfrp = tfrp->q.cqe_next)
+		F_CLR(tfrp, FR_CHANGEWRITE | FR_CURSORSET | FR_EDITED);
+
+	if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
+		return (1);
+	sp->a_frp = frp;
+	F_SET(sp, S_FSWITCH);
+	return (0);
+}
+
+/*
+ * ex_args -- :args
+ *	Display the list of files.
+ */
+int
+ex_args(sp, ep, cmdp)
+	SCR *sp;
+	EXF *ep;
+	EXCMDARG *cmdp;
+{
+	FREF *frp;
+	int cnt, col, iscur, len, nlen, sep;
+	char *name;
+
+	/*
+	 * !!!
+	 * Ignore files that aren't in the "argument" list unless they are the
+	 * one we're currently editing.  I'm not sure this is right, but the
+	 * historic vi behavior of not showing the current file if it was the
+	 * result of a ":e" command, or if the file name was changed was wrong.
+	 * This is actually pretty tricky, don't modify it without thinking it
+	 * through.  There have been a lot of problems in here.
+	 *
+	 * Also, historic practice was to display the original name of the file
+	 * even if the user had used a file command to change the file name.
+	 * Confusing, at best.  We show both names: the original as that's what
+	 * the user will get in a next, prev or rewind, and the new one since
+	 * that's what the user is actually editing now.
+	 *
+	 * When we find the "argument" FREF, i.e. the current location in the
+	 * user's argument list, if it's not the same as the current FREF, we
+	 * display the current FREF as following the argument in the list.
+	 * This means that if the user edits three files, "x", "y" and "z", and
+	 * then does a :e command in the file "x" to edit "z", "z" will appear
+	 * in the list twice.
+	 */
+	col = len = sep = 0;
+	for (cnt = 1, frp = sp->frefq.cqh_first;
+	    frp != (FREF *)&sp->frefq; frp = frp->q.cqe_next) {
+		iscur = 0;
+		/*
+		 * If the last argument FREF structure, and we're editing
+		 * it, set the current bit.  Otherwise, we'll display it,
+		 * then the file we're editing, and the latter will have
+		 * the current bit set.
+		 */
+		if (frp == sp->a_frp) {
+			if (frp == sp->frp && frp->cname == NULL)
+				iscur = 1;
+		} else if (F_ISSET(frp, FR_IGNORE))
+			continue;
+		name = frp->name == NULL ? frp->tname : frp->name;
+		/*
+		 * Mistake.  The user edited a temporary file (vi /tmp), then
+		 * switched to another file (:e file).  The argument FREF is
+		 * pointing to the temporary file, but it doesn't have a name.
+		 * Gracefully recover through the creative use of goto's.
+		 */
+		if (name == NULL)
+			goto testcur;
+extra:		nlen = strlen(name);
+		col += len = nlen + sep + (iscur ? 2 : 0);
+		if (col >= sp->cols - 1) {
+			col = len;
+			sep = 0;
+			(void)ex_printf(EXCOOKIE, "\n");
+		} else if (cnt != 1) {
+			sep = 1;
+			(void)ex_printf(EXCOOKIE, " ");
+		}
+		++cnt;
+
+		if (iscur)
+			(void)ex_printf(EXCOOKIE, "[%s]", name);
+		else {
+			(void)ex_printf(EXCOOKIE, "%s", name);
+testcur:		if (frp == sp->a_frp) {
+				if (frp != sp->frp)
+					name = FILENAME(sp->frp);
+				else
+					name = frp->cname;
+				iscur = 1;
+				goto extra;
+			}
+		}
+	}
+	/* This should never happen; left in because it's been known to. */
+	if (cnt == 1)
+		(void)ex_printf(EXCOOKIE, "No files.\n");
+	else
+		(void)ex_printf(EXCOOKIE, "\n");
+	return (0);
+}