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-rw-r--r--usr.bin/vi/vi/v_switch.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/usr.bin/vi/vi/v_switch.c b/usr.bin/vi/vi/v_switch.c
new file mode 100644
index 000000000000..abdd128f0936
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+++ b/usr.bin/vi/vi/v_switch.c
@@ -0,0 +1,95 @@
+/*-
+ * Copyright (c) 1992, 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[] = "@(#)v_switch.c 8.7 (Berkeley) 3/8/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <queue.h>
+#include <sys/time.h>
+
+#include <bitstring.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <termios.h>
+
+#include <db.h>
+#include <regex.h>
+
+#include "vi.h"
+#include "vcmd.h"
+#include "excmd.h"
+
+/*
+ * v_switch -- ^^
+ * Switch to the previous file.
+ */
+int
+v_switch(sp, ep, vp)
+ SCR *sp;
+ EXF *ep;
+ VICMDARG *vp;
+{
+ EXCMDARG cmd;
+ char *name;
+
+ /*
+ * Try the alternate file name, then the previous file
+ * name. Use the real name, not the user's current name.
+ */
+ if (sp->alt_name != NULL)
+ name = sp->alt_name;
+ else if (sp->p_frp != NULL)
+ name = sp->p_frp->name;
+ else {
+ msgq(sp, M_ERR, "No previous file to edit.");
+ return (1);
+ }
+
+ /* If autowrite is set, write out the file. */
+ if (F_ISSET(ep, F_MODIFIED))
+ if (O_ISSET(sp, O_AUTOWRITE)) {
+ if (file_write(sp, ep, NULL, NULL, NULL, FS_ALL))
+ return (1);
+ } else {
+ msgq(sp, M_ERR,
+ "Modified since last write; write or use :edit! to override.");
+ return (1);
+ }
+
+ SETCMDARG(cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0, name);
+ return (sp->s_ex_cmd(sp, ep, &cmd, &vp->m_final));
+}