Import /usr/src/lib/libedit from NetBSD 8.0

1 files changed, 1157 insertions, 0 deletions

diff --git a/bin/cash/libedit/vi.c b/bin/cash/libedit/vi.c
new file mode 100644
index 00000000..0c37bfb9
--- /dev/null
+++ b/bin/cash/libedit/vi.c
@@ -0,0 +1,1157 @@
+/*	$NetBSD: vi.c,v 1.62 2016/05/09 21:46:56 christos Exp $	*/
+
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Christos Zoulas of Cornell University.
+ *
+ * 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. 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.
+ */
+
+#include "config.h"
+#if !defined(lint) && !defined(SCCSID)
+#if 0
+static char sccsid[] = "@(#)vi.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: vi.c,v 1.62 2016/05/09 21:46:56 christos Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * vi.c: Vi mode commands.
+ */
+#include <sys/wait.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "el.h"
+#include "common.h"
+#include "emacs.h"
+#include "fcns.h"
+#include "vi.h"
+
+static el_action_t	cv_action(EditLine *, wint_t);
+static el_action_t	cv_paste(EditLine *, wint_t);
+
+/* cv_action():
+ *	Handle vi actions.
+ */
+static el_action_t
+cv_action(EditLine *el, wint_t c)
+{
+
+	if (el->el_chared.c_vcmd.action != NOP) {
+		/* 'cc', 'dd' and (possibly) friends */
+		if (c != (wint_t)el->el_chared.c_vcmd.action)
+			return CC_ERROR;
+
+		if (!(c & YANK))
+			cv_undo(el);
+		cv_yank(el, el->el_line.buffer,
+		    (int)(el->el_line.lastchar - el->el_line.buffer));
+		el->el_chared.c_vcmd.action = NOP;
+		el->el_chared.c_vcmd.pos = 0;
+		if (!(c & YANK)) {
+			el->el_line.lastchar = el->el_line.buffer;
+			el->el_line.cursor = el->el_line.buffer;
+		}
+		if (c & INSERT)
+			el->el_map.current = el->el_map.key;
+
+		return CC_REFRESH;
+	}
+	el->el_chared.c_vcmd.pos = el->el_line.cursor;
+	el->el_chared.c_vcmd.action = c;
+	return CC_ARGHACK;
+}
+
+/* cv_paste():
+ *	Paste previous deletion before or after the cursor
+ */
+static el_action_t
+cv_paste(EditLine *el, wint_t c)
+{
+	c_kill_t *k = &el->el_chared.c_kill;
+	size_t len = (size_t)(k->last - k->buf);
+
+	if (k->buf == NULL || len == 0)
+		return CC_ERROR;
+#ifdef DEBUG_PASTE
+	(void) fprintf(el->el_errfile, "Paste: \"%.*ls\"\n", (int)len,
+	    k->buf);
+#endif
+
+	cv_undo(el);
+
+	if (!c && el->el_line.cursor < el->el_line.lastchar)
+		el->el_line.cursor++;
+
+	c_insert(el, (int)len);
+	if (el->el_line.cursor + len > el->el_line.lastchar)
+		return CC_ERROR;
+	(void) memcpy(el->el_line.cursor, k->buf, len *
+	    sizeof(*el->el_line.cursor));
+
+	return CC_REFRESH;
+}
+
+
+/* vi_paste_next():
+ *	Vi paste previous deletion to the right of the cursor
+ *	[p]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_paste_next(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	return cv_paste(el, 0);
+}
+
+
+/* vi_paste_prev():
+ *	Vi paste previous deletion to the left of the cursor
+ *	[P]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_paste_prev(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	return cv_paste(el, 1);
+}
+
+
+/* vi_prev_big_word():
+ *	Vi move to the previous space delimited word
+ *	[B]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_prev_big_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor == el->el_line.buffer)
+		return CC_ERROR;
+
+	el->el_line.cursor = cv_prev_word(el->el_line.cursor,
+	    el->el_line.buffer,
+	    el->el_state.argument,
+	    cv__isWord);
+
+	if (el->el_chared.c_vcmd.action != NOP) {
+		cv_delfini(el);
+		return CC_REFRESH;
+	}
+	return CC_CURSOR;
+}
+
+
+/* vi_prev_word():
+ *	Vi move to the previous word
+ *	[b]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor == el->el_line.buffer)
+		return CC_ERROR;
+
+	el->el_line.cursor = cv_prev_word(el->el_line.cursor,
+	    el->el_line.buffer,
+	    el->el_state.argument,
+	    cv__isword);
+
+	if (el->el_chared.c_vcmd.action != NOP) {
+		cv_delfini(el);
+		return CC_REFRESH;
+	}
+	return CC_CURSOR;
+}
+
+
+/* vi_next_big_word():
+ *	Vi move to the next space delimited word
+ *	[W]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_next_big_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor >= el->el_line.lastchar - 1)
+		return CC_ERROR;
+
+	el->el_line.cursor = cv_next_word(el, el->el_line.cursor,
+	    el->el_line.lastchar, el->el_state.argument, cv__isWord);
+
+	if (el->el_map.type == MAP_VI)
+		if (el->el_chared.c_vcmd.action != NOP) {
+			cv_delfini(el);
+			return CC_REFRESH;
+		}
+	return CC_CURSOR;
+}
+
+
+/* vi_next_word():
+ *	Vi move to the next word
+ *	[w]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_next_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor >= el->el_line.lastchar - 1)
+		return CC_ERROR;
+
+	el->el_line.cursor = cv_next_word(el, el->el_line.cursor,
+	    el->el_line.lastchar, el->el_state.argument, cv__isword);
+
+	if (el->el_map.type == MAP_VI)
+		if (el->el_chared.c_vcmd.action != NOP) {
+			cv_delfini(el);
+			return CC_REFRESH;
+		}
+	return CC_CURSOR;
+}
+
+
+/* vi_change_case():
+ *	Vi change case of character under the cursor and advance one character
+ *	[~]
+ */
+libedit_private el_action_t
+vi_change_case(EditLine *el, wint_t c)
+{
+	int i;
+
+	if (el->el_line.cursor >= el->el_line.lastchar)
+		return CC_ERROR;
+	cv_undo(el);
+	for (i = 0; i < el->el_state.argument; i++) {
+
+		c = *el->el_line.cursor;
+		if (iswupper(c))
+			*el->el_line.cursor = towlower(c);
+		else if (iswlower(c))
+			*el->el_line.cursor = towupper(c);
+
+		if (++el->el_line.cursor >= el->el_line.lastchar) {
+			el->el_line.cursor--;
+			re_fastaddc(el);
+			break;
+		}
+		re_fastaddc(el);
+	}
+	return CC_NORM;
+}
+
+
+/* vi_change_meta():
+ *	Vi change prefix command
+ *	[c]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_change_meta(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	/*
+         * Delete with insert == change: first we delete and then we leave in
+         * insert mode.
+         */
+	return cv_action(el, DELETE | INSERT);
+}
+
+
+/* vi_insert_at_bol():
+ *	Vi enter insert mode at the beginning of line
+ *	[I]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_insert_at_bol(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_line.cursor = el->el_line.buffer;
+	cv_undo(el);
+	el->el_map.current = el->el_map.key;
+	return CC_CURSOR;
+}
+
+
+/* vi_replace_char():
+ *	Vi replace character under the cursor with the next character typed
+ *	[r]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_replace_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor >= el->el_line.lastchar)
+		return CC_ERROR;
+
+	el->el_map.current = el->el_map.key;
+	el->el_state.inputmode = MODE_REPLACE_1;
+	cv_undo(el);
+	return CC_ARGHACK;
+}
+
+
+/* vi_replace_mode():
+ *	Vi enter replace mode
+ *	[R]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_replace_mode(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_map.current = el->el_map.key;
+	el->el_state.inputmode = MODE_REPLACE;
+	cv_undo(el);
+	return CC_NORM;
+}
+
+
+/* vi_substitute_char():
+ *	Vi replace character under the cursor and enter insert mode
+ *	[s]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_substitute_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	c_delafter(el, el->el_state.argument);
+	el->el_map.current = el->el_map.key;
+	return CC_REFRESH;
+}
+
+
+/* vi_substitute_line():
+ *	Vi substitute entire line
+ *	[S]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_substitute_line(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	cv_undo(el);
+	cv_yank(el, el->el_line.buffer,
+	    (int)(el->el_line.lastchar - el->el_line.buffer));
+	(void) em_kill_line(el, 0);
+	el->el_map.current = el->el_map.key;
+	return CC_REFRESH;
+}
+
+
+/* vi_change_to_eol():
+ *	Vi change to end of line
+ *	[C]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_change_to_eol(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	cv_undo(el);
+	cv_yank(el, el->el_line.cursor,
+	    (int)(el->el_line.lastchar - el->el_line.cursor));
+	(void) ed_kill_line(el, 0);
+	el->el_map.current = el->el_map.key;
+	return CC_REFRESH;
+}
+
+
+/* vi_insert():
+ *	Vi enter insert mode
+ *	[i]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_insert(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_map.current = el->el_map.key;
+	cv_undo(el);
+	return CC_NORM;
+}
+
+
+/* vi_add():
+ *	Vi enter insert mode after the cursor
+ *	[a]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_add(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	int ret;
+
+	el->el_map.current = el->el_map.key;
+	if (el->el_line.cursor < el->el_line.lastchar) {
+		el->el_line.cursor++;
+		if (el->el_line.cursor > el->el_line.lastchar)
+			el->el_line.cursor = el->el_line.lastchar;
+		ret = CC_CURSOR;
+	} else
+		ret = CC_NORM;
+
+	cv_undo(el);
+
+	return (el_action_t)ret;
+}
+
+
+/* vi_add_at_eol():
+ *	Vi enter insert mode at end of line
+ *	[A]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_add_at_eol(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_map.current = el->el_map.key;
+	el->el_line.cursor = el->el_line.lastchar;
+	cv_undo(el);
+	return CC_CURSOR;
+}
+
+
+/* vi_delete_meta():
+ *	Vi delete prefix command
+ *	[d]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_delete_meta(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	return cv_action(el, DELETE);
+}
+
+
+/* vi_end_big_word():
+ *	Vi move to the end of the current space delimited word
+ *	[E]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_end_big_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor == el->el_line.lastchar)
+		return CC_ERROR;
+
+	el->el_line.cursor = cv__endword(el->el_line.cursor,
+	    el->el_line.lastchar, el->el_state.argument, cv__isWord);
+
+	if (el->el_chared.c_vcmd.action != NOP) {
+		el->el_line.cursor++;
+		cv_delfini(el);
+		return CC_REFRESH;
+	}
+	return CC_CURSOR;
+}
+
+
+/* vi_end_word():
+ *	Vi move to the end of the current word
+ *	[e]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_end_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor == el->el_line.lastchar)
+		return CC_ERROR;
+
+	el->el_line.cursor = cv__endword(el->el_line.cursor,
+	    el->el_line.lastchar, el->el_state.argument, cv__isword);
+
+	if (el->el_chared.c_vcmd.action != NOP) {
+		el->el_line.cursor++;
+		cv_delfini(el);
+		return CC_REFRESH;
+	}
+	return CC_CURSOR;
+}
+
+
+/* vi_undo():
+ *	Vi undo last change
+ *	[u]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_undo(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	c_undo_t un = el->el_chared.c_undo;
+
+	if (un.len == -1)
+		return CC_ERROR;
+
+	/* switch line buffer and undo buffer */
+	el->el_chared.c_undo.buf = el->el_line.buffer;
+	el->el_chared.c_undo.len = el->el_line.lastchar - el->el_line.buffer;
+	el->el_chared.c_undo.cursor =
+	    (int)(el->el_line.cursor - el->el_line.buffer);
+	el->el_line.limit = un.buf + (el->el_line.limit - el->el_line.buffer);
+	el->el_line.buffer = un.buf;
+	el->el_line.cursor = un.buf + un.cursor;
+	el->el_line.lastchar = un.buf + un.len;
+
+	return CC_REFRESH;
+}
+
+
+/* vi_command_mode():
+ *	Vi enter command mode (use alternative key bindings)
+ *	[<ESC>]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_command_mode(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	/* [Esc] cancels pending action */
+	el->el_chared.c_vcmd.action = NOP;
+	el->el_chared.c_vcmd.pos = 0;
+
+	el->el_state.doingarg = 0;
+
+	el->el_state.inputmode = MODE_INSERT;
+	el->el_map.current = el->el_map.alt;
+#ifdef VI_MOVE
+	if (el->el_line.cursor > el->el_line.buffer)
+		el->el_line.cursor--;
+#endif
+	return CC_CURSOR;
+}
+
+
+/* vi_zero():
+ *	Vi move to the beginning of line
+ *	[0]
+ */
+libedit_private el_action_t
+vi_zero(EditLine *el, wint_t c)
+{
+
+	if (el->el_state.doingarg)
+		return ed_argument_digit(el, c);
+
+	el->el_line.cursor = el->el_line.buffer;
+	if (el->el_chared.c_vcmd.action != NOP) {
+		cv_delfini(el);
+		return CC_REFRESH;
+	}
+	return CC_CURSOR;
+}
+
+
+/* vi_delete_prev_char():
+ *	Vi move to previous character (backspace)
+ *	[^H] in insert mode only
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_delete_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor <= el->el_line.buffer)
+		return CC_ERROR;
+
+	c_delbefore1(el);
+	el->el_line.cursor--;
+	return CC_REFRESH;
+}
+
+
+/* vi_list_or_eof():
+ *	Vi list choices for completion or indicate end of file if empty line
+ *	[^D]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_list_or_eof(EditLine *el, wint_t c)
+{
+
+	if (el->el_line.cursor == el->el_line.lastchar) {
+		if (el->el_line.cursor == el->el_line.buffer) {
+			terminal_writec(el, c);	/* then do a EOF */
+			return CC_EOF;
+		} else {
+			/*
+			 * Here we could list completions, but it is an
+			 * error right now
+			 */
+			terminal_beep(el);
+			return CC_ERROR;
+		}
+	} else {
+#ifdef notyet
+		re_goto_bottom(el);
+		*el->el_line.lastchar = '\0';	/* just in case */
+		return CC_LIST_CHOICES;
+#else
+		/*
+		 * Just complain for now.
+		 */
+		terminal_beep(el);
+		return CC_ERROR;
+#endif
+	}
+}
+
+
+/* vi_kill_line_prev():
+ *	Vi cut from beginning of line to cursor
+ *	[^U]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_kill_line_prev(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *kp, *cp;
+
+	cp = el->el_line.buffer;
+	kp = el->el_chared.c_kill.buf;
+	while (cp < el->el_line.cursor)
+		*kp++ = *cp++;	/* copy it */
+	el->el_chared.c_kill.last = kp;
+	c_delbefore(el, (int)(el->el_line.cursor - el->el_line.buffer));
+	el->el_line.cursor = el->el_line.buffer;	/* zap! */
+	return CC_REFRESH;
+}
+
+
+/* vi_search_prev():
+ *	Vi search history previous
+ *	[?]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_search_prev(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	return cv_search(el, ED_SEARCH_PREV_HISTORY);
+}
+
+
+/* vi_search_next():
+ *	Vi search history next
+ *	[/]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_search_next(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	return cv_search(el, ED_SEARCH_NEXT_HISTORY);
+}
+
+
+/* vi_repeat_search_next():
+ *	Vi repeat current search in the same search direction
+ *	[n]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_repeat_search_next(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_search.patlen == 0)
+		return CC_ERROR;
+	else
+		return cv_repeat_srch(el, el->el_search.patdir);
+}
+
+
+/* vi_repeat_search_prev():
+ *	Vi repeat current search in the opposite search direction
+ *	[N]
+ */
+/*ARGSUSED*/
+libedit_private el_action_t
+vi_repeat_search_prev(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_search.patlen == 0)
+		return CC_ERROR;
+	else
+		return (cv_repeat_srch(el,
+		    el->el_search.patdir == ED_SEARCH_PREV_HISTORY ?
+		    ED_SEARCH_NEXT_HISTORY : ED_SEARCH_PREV_HISTORY));
+}
+
+
+/* vi_next_char():
+ *	Vi move to the character specified next
+ *	[f]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	return cv_csearch(el, CHAR_FWD, -1, el->el_state.argument, 0);
+}
+
+
+/* vi_prev_char():
+ *	Vi move to the character specified previous
+ *	[F]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	return cv_csearch(el, CHAR_BACK, -1, el->el_state.argument, 0);
+}
+
+
+/* vi_to_next_char():
+ *	Vi move up to the character specified next
+ *	[t]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_to_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	return cv_csearch(el, CHAR_FWD, -1, el->el_state.argument, 1);
+}
+
+
+/* vi_to_prev_char():
+ *	Vi move up to the character specified previous
+ *	[T]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_to_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	return cv_csearch(el, CHAR_BACK, -1, el->el_state.argument, 1);
+}
+
+
+/* vi_repeat_next_char():
+ *	Vi repeat current character search in the same search direction
+ *	[;]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_repeat_next_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	return cv_csearch(el, el->el_search.chadir, el->el_search.chacha,
+		el->el_state.argument, el->el_search.chatflg);
+}
+
+
+/* vi_repeat_prev_char():
+ *	Vi repeat current character search in the opposite search direction
+ *	[,]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_repeat_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	el_action_t r;
+	int dir = el->el_search.chadir;
+
+	r = cv_csearch(el, -dir, el->el_search.chacha,
+		el->el_state.argument, el->el_search.chatflg);
+	el->el_search.chadir = dir;
+	return r;
+}
+
+
+/* vi_match():
+ *	Vi go to matching () {} or []
+ *	[%]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_match(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	const wchar_t match_chars[] = L"()[]{}";
+	wchar_t *cp;
+	size_t delta, i, count;
+	wchar_t o_ch, c_ch;
+
+	*el->el_line.lastchar = '\0';		/* just in case */
+
+	i = wcscspn(el->el_line.cursor, match_chars);
+	o_ch = el->el_line.cursor[i];
+	if (o_ch == 0)
+		return CC_ERROR;
+	delta = (size_t)(wcschr(match_chars, o_ch) - match_chars);
+	c_ch = match_chars[delta ^ 1];
+	count = 1;
+	delta = 1 - (delta & 1) * 2;
+
+	for (cp = &el->el_line.cursor[i]; count; ) {
+		cp += delta;
+		if (cp < el->el_line.buffer || cp >= el->el_line.lastchar)
+			return CC_ERROR;
+		if (*cp == o_ch)
+			count++;
+		else if (*cp == c_ch)
+			count--;
+	}
+
+	el->el_line.cursor = cp;
+
+	if (el->el_chared.c_vcmd.action != NOP) {
+		/* NB posix says char under cursor should NOT be deleted
+		   for -ve delta - this is different to netbsd vi. */
+		if (delta > 0)
+			el->el_line.cursor++;
+		cv_delfini(el);
+		return CC_REFRESH;
+	}
+	return CC_CURSOR;
+}
+
+/* vi_undo_line():
+ *	Vi undo all changes to line
+ *	[U]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_undo_line(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	cv_undo(el);
+	return hist_get(el);
+}
+
+/* vi_to_column():
+ *	Vi go to specified column
+ *	[|]
+ * NB netbsd vi goes to screen column 'n', posix says nth character
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_to_column(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_line.cursor = el->el_line.buffer;
+	el->el_state.argument--;
+	return ed_next_char(el, 0);
+}
+
+/* vi_yank_end():
+ *	Vi yank to end of line
+ *	[Y]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_yank_end(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	cv_yank(el, el->el_line.cursor,
+	    (int)(el->el_line.lastchar - el->el_line.cursor));
+	return CC_REFRESH;
+}
+
+/* vi_yank():
+ *	Vi yank
+ *	[y]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_yank(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	return cv_action(el, YANK);
+}
+
+/* vi_comment_out():
+ *	Vi comment out current command
+ *	[#]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_comment_out(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_line.cursor = el->el_line.buffer;
+	c_insert(el, 1);
+	*el->el_line.cursor = '#';
+	re_refresh(el);
+	return ed_newline(el, 0);
+}
+
+/* vi_alias():
+ *	Vi include shell alias
+ *	[@]
+ * NB: posix implies that we should enter insert mode, however
+ * this is against historical precedent...
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_alias(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	char alias_name[3];
+	const char *alias_text;
+
+	if (el->el_chared.c_aliasfun == NULL)
+		return CC_ERROR;
+
+	alias_name[0] = '_';
+	alias_name[2] = 0;
+	if (el_getc(el, &alias_name[1]) != 1)
+		return CC_ERROR;
+
+	alias_text = (*el->el_chared.c_aliasfun)(el->el_chared.c_aliasarg,
+	    alias_name);
+	if (alias_text != NULL)
+		el_wpush(el, ct_decode_string(alias_text, &el->el_scratch));
+	return CC_NORM;
+}
+
+/* vi_to_history_line():
+ *	Vi go to specified history file line.
+ *	[G]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_to_history_line(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	int sv_event_no = el->el_history.eventno;
+	el_action_t rval;
+
+
+	if (el->el_history.eventno == 0) {
+		 (void) wcsncpy(el->el_history.buf, el->el_line.buffer,
+		     EL_BUFSIZ);
+		 el->el_history.last = el->el_history.buf +
+			 (el->el_line.lastchar - el->el_line.buffer);
+	}
+
+	/* Lack of a 'count' means oldest, not 1 */
+	if (!el->el_state.doingarg) {
+		el->el_history.eventno = 0x7fffffff;
+		hist_get(el);
+	} else {
+		/* This is brain dead, all the rest of this code counts
+		 * upwards going into the past.  Here we need count in the
+		 * other direction (to match the output of fc -l).
+		 * I could change the world, but this seems to suffice.
+		 */
+		el->el_history.eventno = 1;
+		if (hist_get(el) == CC_ERROR)
+			return CC_ERROR;
+		el->el_history.eventno = 1 + el->el_history.ev.num
+					- el->el_state.argument;
+		if (el->el_history.eventno < 0) {
+			el->el_history.eventno = sv_event_no;
+			return CC_ERROR;
+		}
+	}
+	rval = hist_get(el);
+	if (rval == CC_ERROR)
+		el->el_history.eventno = sv_event_no;
+	return rval;
+}
+
+/* vi_histedit():
+ *	Vi edit history line with vi
+ *	[v]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_histedit(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	int fd;
+	pid_t pid;
+	ssize_t st;
+	int status;
+	char tempfile[] = "/tmp/histedit.XXXXXXXXXX";
+	char *cp = NULL;
+	size_t len;
+	wchar_t *line = NULL;
+
+	if (el->el_state.doingarg) {
+		if (vi_to_history_line(el, 0) == CC_ERROR)
+			return CC_ERROR;
+	}
+
+	fd = mkstemp(tempfile);
+	if (fd < 0)
+		return CC_ERROR;
+	len = (size_t)(el->el_line.lastchar - el->el_line.buffer);
+#define TMP_BUFSIZ (EL_BUFSIZ * MB_LEN_MAX)
+	cp = el_malloc(TMP_BUFSIZ * sizeof(*cp));
+	if (cp == NULL)
+		goto error;
+	line = el_malloc(len * sizeof(*line) + 1);
+	if (line == NULL)
+		goto error;
+	wcsncpy(line, el->el_line.buffer, len);
+	line[len] = '\0';
+	wcstombs(cp, line, TMP_BUFSIZ - 1);
+	cp[TMP_BUFSIZ - 1] = '\0';
+	len = strlen(cp);
+	write(fd, cp, len);
+	write(fd, "\n", (size_t)1);
+	pid = fork();
+	switch (pid) {
+	case -1:
+		goto error;
+	case 0:
+		close(fd);
+		execlp("vi", "vi", tempfile, (char *)NULL);
+		exit(0);
+		/*NOTREACHED*/
+	default:
+		while (waitpid(pid, &status, 0) != pid)
+			continue;
+		lseek(fd, (off_t)0, SEEK_SET);
+		st = read(fd, cp, TMP_BUFSIZ - 1);
+		if (st > 0) {
+			cp[st] = '\0';
+			len = (size_t)(el->el_line.limit - el->el_line.buffer);
+			len = mbstowcs(el->el_line.buffer, cp, len);
+			if (len > 0 && el->el_line.buffer[len - 1] == '\n')
+				--len;
+		}
+		else
+			len = 0;
+                el->el_line.cursor = el->el_line.buffer;
+                el->el_line.lastchar = el->el_line.buffer + len;
+		el_free(cp);
+                el_free(line);
+		break;
+	}
+
+	close(fd);
+	unlink(tempfile);
+	/* return CC_REFRESH; */
+	return ed_newline(el, 0);
+error:
+	el_free(line);
+	el_free(cp);
+	close(fd);
+	unlink(tempfile);
+	return CC_ERROR;
+}
+
+/* vi_history_word():
+ *	Vi append word from previous input line
+ *	[_]
+ * Who knows where this one came from!
+ * '_' in vi means 'entire current line', so 'cc' is a synonym for 'c_'
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_history_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	const wchar_t *wp = HIST_FIRST(el);
+	const wchar_t *wep, *wsp;
+	int len;
+	wchar_t *cp;
+	const wchar_t *lim;
+
+	if (wp == NULL)
+		return CC_ERROR;
+
+	wep = wsp = NULL;
+	do {
+		while (iswspace(*wp))
+			wp++;
+		if (*wp == 0)
+			break;
+		wsp = wp;
+		while (*wp && !iswspace(*wp))
+			wp++;
+		wep = wp;
+	} while ((!el->el_state.doingarg || --el->el_state.argument > 0)
+	    && *wp != 0);
+
+	if (wsp == NULL || (el->el_state.doingarg && el->el_state.argument != 0))
+		return CC_ERROR;
+
+	cv_undo(el);
+	len = (int)(wep - wsp);
+	if (el->el_line.cursor < el->el_line.lastchar)
+		el->el_line.cursor++;
+	c_insert(el, len + 1);
+	cp = el->el_line.cursor;
+	lim = el->el_line.limit;
+	if (cp < lim)
+		*cp++ = ' ';
+	while (wsp < wep && cp < lim)
+		*cp++ = *wsp++;
+	el->el_line.cursor = cp;
+
+	el->el_map.current = el->el_map.key;
+	return CC_REFRESH;
+}
+
+/* vi_redo():
+ *	Vi redo last non-motion command
+ *	[.]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+vi_redo(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	c_redo_t *r = &el->el_chared.c_redo;
+
+	if (!el->el_state.doingarg && r->count) {
+		el->el_state.doingarg = 1;
+		el->el_state.argument = r->count;
+	}
+
+	el->el_chared.c_vcmd.pos = el->el_line.cursor;
+	el->el_chared.c_vcmd.action = r->action;
+	if (r->pos != r->buf) {
+		if (r->pos + 1 > r->lim)
+			/* sanity */
+			r->pos = r->lim - 1;
+		r->pos[0] = 0;
+		el_wpush(el, r->buf);
+	}
+
+	el->el_state.thiscmd = r->cmd;
+	el->el_state.thisch = r->ch;
+	return (*el->el_map.func[r->cmd])(el, r->ch);
+}