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

1 files changed, 512 insertions, 0 deletions

diff --git a/bin/cash/libedit/emacs.c b/bin/cash/libedit/emacs.c
new file mode 100644
index 00000000..0636c28b
--- /dev/null
+++ b/bin/cash/libedit/emacs.c
@@ -0,0 +1,512 @@
+/*	$NetBSD: emacs.c,v 1.36 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[] = "@(#)emacs.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: emacs.c,v 1.36 2016/05/09 21:46:56 christos Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * emacs.c: Emacs functions
+ */
+#include <ctype.h>
+
+#include "el.h"
+#include "emacs.h"
+#include "fcns.h"
+
+/* em_delete_or_list():
+ *	Delete character under cursor or list completions if at end of line
+ *	[^D]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_delete_or_list(EditLine *el, wint_t c)
+{
+
+	if (el->el_line.cursor == el->el_line.lastchar) {
+					/* if I'm at the end */
+		if (el->el_line.cursor == el->el_line.buffer) {
+					/* and the beginning */
+			terminal_writec(el, c);	/* then do an EOF */
+			return CC_EOF;
+		} else {
+			/*
+			 * Here we could list completions, but it is an
+			 * error right now
+			 */
+			terminal_beep(el);
+			return CC_ERROR;
+		}
+	} else {
+		if (el->el_state.doingarg)
+			c_delafter(el, el->el_state.argument);
+		else
+			c_delafter1(el);
+		if (el->el_line.cursor > el->el_line.lastchar)
+			el->el_line.cursor = el->el_line.lastchar;
+				/* bounds check */
+		return CC_REFRESH;
+	}
+}
+
+
+/* em_delete_next_word():
+ *	Cut from cursor to end of current word
+ *	[M-d]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_delete_next_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *cp, *p, *kp;
+
+	if (el->el_line.cursor == el->el_line.lastchar)
+		return CC_ERROR;
+
+	cp = c__next_word(el->el_line.cursor, el->el_line.lastchar,
+	    el->el_state.argument, ce__isword);
+
+	for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++)
+				/* save the text */
+		*kp++ = *p;
+	el->el_chared.c_kill.last = kp;
+
+	c_delafter(el, (int)(cp - el->el_line.cursor));	/* delete after dot */
+	if (el->el_line.cursor > el->el_line.lastchar)
+		el->el_line.cursor = el->el_line.lastchar;
+				/* bounds check */
+	return CC_REFRESH;
+}
+
+
+/* em_yank():
+ *	Paste cut buffer at cursor position
+ *	[^Y]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_yank(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *kp, *cp;
+
+	if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf)
+		return CC_NORM;
+
+	if (el->el_line.lastchar +
+	    (el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >=
+	    el->el_line.limit)
+		return CC_ERROR;
+
+	el->el_chared.c_kill.mark = el->el_line.cursor;
+	cp = el->el_line.cursor;
+
+	/* open the space, */
+	c_insert(el,
+	    (int)(el->el_chared.c_kill.last - el->el_chared.c_kill.buf));
+	/* copy the chars */
+	for (kp = el->el_chared.c_kill.buf; kp < el->el_chared.c_kill.last; kp++)
+		*cp++ = *kp;
+
+	/* if an arg, cursor at beginning else cursor at end */
+	if (el->el_state.argument == 1)
+		el->el_line.cursor = cp;
+
+	return CC_REFRESH;
+}
+
+
+/* em_kill_line():
+ *	Cut the entire line and save in cut buffer
+ *	[^U]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_kill_line(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.lastchar)
+		*kp++ = *cp++;	/* copy it */
+	el->el_chared.c_kill.last = kp;
+				/* zap! -- delete all of it */
+	el->el_line.lastchar = el->el_line.buffer;
+	el->el_line.cursor = el->el_line.buffer;
+	return CC_REFRESH;
+}
+
+
+/* em_kill_region():
+ *	Cut area between mark and cursor and save in cut buffer
+ *	[^W]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_kill_region(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *kp, *cp;
+
+	if (!el->el_chared.c_kill.mark)
+		return CC_ERROR;
+
+	if (el->el_chared.c_kill.mark > el->el_line.cursor) {
+		cp = el->el_line.cursor;
+		kp = el->el_chared.c_kill.buf;
+		while (cp < el->el_chared.c_kill.mark)
+			*kp++ = *cp++;	/* copy it */
+		el->el_chared.c_kill.last = kp;
+		c_delafter(el, (int)(cp - el->el_line.cursor));
+	} else {		/* mark is before cursor */
+		cp = el->el_chared.c_kill.mark;
+		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)(cp - el->el_chared.c_kill.mark));
+		el->el_line.cursor = el->el_chared.c_kill.mark;
+	}
+	return CC_REFRESH;
+}
+
+
+/* em_copy_region():
+ *	Copy area between mark and cursor to cut buffer
+ *	[M-W]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_copy_region(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *kp, *cp;
+
+	if (!el->el_chared.c_kill.mark)
+		return CC_ERROR;
+
+	if (el->el_chared.c_kill.mark > el->el_line.cursor) {
+		cp = el->el_line.cursor;
+		kp = el->el_chared.c_kill.buf;
+		while (cp < el->el_chared.c_kill.mark)
+			*kp++ = *cp++;	/* copy it */
+		el->el_chared.c_kill.last = kp;
+	} else {
+		cp = el->el_chared.c_kill.mark;
+		kp = el->el_chared.c_kill.buf;
+		while (cp < el->el_line.cursor)
+			*kp++ = *cp++;	/* copy it */
+		el->el_chared.c_kill.last = kp;
+	}
+	return CC_NORM;
+}
+
+
+/* em_gosmacs_transpose():
+ *	Exchange the two characters before the cursor
+ *	Gosling emacs transpose chars [^T]
+ */
+libedit_private el_action_t
+em_gosmacs_transpose(EditLine *el, wint_t c)
+{
+
+	if (el->el_line.cursor > &el->el_line.buffer[1]) {
+		/* must have at least two chars entered */
+		c = el->el_line.cursor[-2];
+		el->el_line.cursor[-2] = el->el_line.cursor[-1];
+		el->el_line.cursor[-1] = c;
+		return CC_REFRESH;
+	} else
+		return CC_ERROR;
+}
+
+
+/* em_next_word():
+ *	Move next to end of current word
+ *	[M-f]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_next_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	if (el->el_line.cursor == el->el_line.lastchar)
+		return CC_ERROR;
+
+	el->el_line.cursor = c__next_word(el->el_line.cursor,
+	    el->el_line.lastchar,
+	    el->el_state.argument,
+	    ce__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;
+}
+
+
+/* em_upper_case():
+ *	Uppercase the characters from cursor to end of current word
+ *	[M-u]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_upper_case(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *cp, *ep;
+
+	ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
+	    el->el_state.argument, ce__isword);
+
+	for (cp = el->el_line.cursor; cp < ep; cp++)
+		if (iswlower(*cp))
+			*cp = towupper(*cp);
+
+	el->el_line.cursor = ep;
+	if (el->el_line.cursor > el->el_line.lastchar)
+		el->el_line.cursor = el->el_line.lastchar;
+	return CC_REFRESH;
+}
+
+
+/* em_capitol_case():
+ *	Capitalize the characters from cursor to end of current word
+ *	[M-c]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_capitol_case(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *cp, *ep;
+
+	ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
+	    el->el_state.argument, ce__isword);
+
+	for (cp = el->el_line.cursor; cp < ep; cp++) {
+		if (iswalpha(*cp)) {
+			if (iswlower(*cp))
+				*cp = towupper(*cp);
+			cp++;
+			break;
+		}
+	}
+	for (; cp < ep; cp++)
+		if (iswupper(*cp))
+			*cp = towlower(*cp);
+
+	el->el_line.cursor = ep;
+	if (el->el_line.cursor > el->el_line.lastchar)
+		el->el_line.cursor = el->el_line.lastchar;
+	return CC_REFRESH;
+}
+
+
+/* em_lower_case():
+ *	Lowercase the characters from cursor to end of current word
+ *	[M-l]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_lower_case(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *cp, *ep;
+
+	ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
+	    el->el_state.argument, ce__isword);
+
+	for (cp = el->el_line.cursor; cp < ep; cp++)
+		if (iswupper(*cp))
+			*cp = towlower(*cp);
+
+	el->el_line.cursor = ep;
+	if (el->el_line.cursor > el->el_line.lastchar)
+		el->el_line.cursor = el->el_line.lastchar;
+	return CC_REFRESH;
+}
+
+
+/* em_set_mark():
+ *	Set the mark at cursor
+ *	[^@]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_set_mark(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_chared.c_kill.mark = el->el_line.cursor;
+	return CC_NORM;
+}
+
+
+/* em_exchange_mark():
+ *	Exchange the cursor and mark
+ *	[^X^X]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_exchange_mark(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *cp;
+
+	cp = el->el_line.cursor;
+	el->el_line.cursor = el->el_chared.c_kill.mark;
+	el->el_chared.c_kill.mark = cp;
+	return CC_CURSOR;
+}
+
+
+/* em_universal_argument():
+ *	Universal argument (argument times 4)
+ *	[^U]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_universal_argument(EditLine *el, wint_t c __attribute__((__unused__)))
+{				/* multiply current argument by 4 */
+
+	if (el->el_state.argument > 1000000)
+		return CC_ERROR;
+	el->el_state.doingarg = 1;
+	el->el_state.argument *= 4;
+	return CC_ARGHACK;
+}
+
+
+/* em_meta_next():
+ *	Add 8th bit to next character typed
+ *	[<ESC>]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_meta_next(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_state.metanext = 1;
+	return CC_ARGHACK;
+}
+
+
+/* em_toggle_overwrite():
+ *	Switch from insert to overwrite mode or vice versa
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_toggle_overwrite(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_state.inputmode = (el->el_state.inputmode == MODE_INSERT) ?
+	    MODE_REPLACE : MODE_INSERT;
+	return CC_NORM;
+}
+
+
+/* em_copy_prev_word():
+ *	Copy current word to cursor
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_copy_prev_word(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+	wchar_t *cp, *oldc, *dp;
+
+	if (el->el_line.cursor == el->el_line.buffer)
+		return CC_ERROR;
+
+	oldc = el->el_line.cursor;
+	/* does a bounds check */
+	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
+	    el->el_state.argument, ce__isword);
+
+	c_insert(el, (int)(oldc - cp));
+	for (dp = oldc; cp < oldc && dp < el->el_line.lastchar; cp++)
+		*dp++ = *cp;
+
+	el->el_line.cursor = dp;/* put cursor at end */
+
+	return CC_REFRESH;
+}
+
+
+/* em_inc_search_next():
+ *	Emacs incremental next search
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_inc_search_next(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_search.patlen = 0;
+	return ce_inc_search(el, ED_SEARCH_NEXT_HISTORY);
+}
+
+
+/* em_inc_search_prev():
+ *	Emacs incremental reverse search
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_inc_search_prev(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	el->el_search.patlen = 0;
+	return ce_inc_search(el, ED_SEARCH_PREV_HISTORY);
+}
+
+
+/* em_delete_prev_char():
+ *	Delete the character to the left of the cursor
+ *	[^?]
+ */
+libedit_private el_action_t
+/*ARGSUSED*/
+em_delete_prev_char(EditLine *el, wint_t c __attribute__((__unused__)))
+{
+
+	if (el->el_line.cursor <= el->el_line.buffer)
+		return CC_ERROR;
+
+	if (el->el_state.doingarg)
+		c_delbefore(el, el->el_state.argument);
+	else
+		c_delbefore1(el);
+	el->el_line.cursor -= el->el_state.argument;
+	if (el->el_line.cursor < el->el_line.buffer)
+		el->el_line.cursor = el->el_line.buffer;
+	return CC_REFRESH;
+}