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

1 files changed, 641 insertions, 0 deletions

diff --git a/bin/cash/libedit/search.c b/bin/cash/libedit/search.c
new file mode 100644
index 00000000..5226cf5f
--- /dev/null
+++ b/bin/cash/libedit/search.c
@@ -0,0 +1,641 @@
+/*	$NetBSD: search.c,v 1.47 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[] = "@(#)search.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: search.c,v 1.47 2016/05/09 21:46:56 christos Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * search.c: History and character search functions
+ */
+#include <stdlib.h>
+#include <string.h>
+#if defined(REGEX)
+#include <regex.h>
+#elif defined(REGEXP)
+#include <regexp.h>
+#endif
+
+#include "el.h"
+#include "common.h"
+#include "fcns.h"
+
+/*
+ * Adjust cursor in vi mode to include the character under it
+ */
+#define	EL_CURSOR(el) \
+    ((el)->el_line.cursor + (((el)->el_map.type == MAP_VI) && \
+			    ((el)->el_map.current == (el)->el_map.alt)))
+
+/* search_init():
+ *	Initialize the search stuff
+ */
+libedit_private int
+search_init(EditLine *el)
+{
+
+	el->el_search.patbuf = el_malloc(EL_BUFSIZ *
+	    sizeof(*el->el_search.patbuf));
+	if (el->el_search.patbuf == NULL)
+		return -1;
+	el->el_search.patbuf[0] = L'\0';
+	el->el_search.patlen = 0;
+	el->el_search.patdir = -1;
+	el->el_search.chacha = L'\0';
+	el->el_search.chadir = CHAR_FWD;
+	el->el_search.chatflg = 0;
+	return 0;
+}
+
+
+/* search_end():
+ *	Initialize the search stuff
+ */
+libedit_private void
+search_end(EditLine *el)
+{
+
+	el_free(el->el_search.patbuf);
+	el->el_search.patbuf = NULL;
+}
+
+
+#ifdef REGEXP
+/* regerror():
+ *	Handle regular expression errors
+ */
+void
+/*ARGSUSED*/
+regerror(const char *msg)
+{
+}
+#endif
+
+
+/* el_match():
+ *	Return if string matches pattern
+ */
+libedit_private int
+el_match(const wchar_t *str, const wchar_t *pat)
+{
+	static ct_buffer_t conv;
+#if defined (REGEX)
+	regex_t re;
+	int rv;
+#elif defined (REGEXP)
+	regexp *rp;
+	int rv;
+#else
+	extern char	*re_comp(const char *);
+	extern int	 re_exec(const char *);
+#endif
+
+	if (wcsstr(str, pat) != 0)
+		return 1;
+
+#if defined(REGEX)
+	if (regcomp(&re, ct_encode_string(pat, &conv), 0) == 0) {
+		rv = regexec(&re, ct_encode_string(str, &conv), (size_t)0, NULL,
+		    0) == 0;
+		regfree(&re);
+	} else {
+		rv = 0;
+	}
+	return rv;
+#elif defined(REGEXP)
+	if ((re = regcomp(ct_encode_string(pat, &conv))) != NULL) {
+		rv = regexec(re, ct_encode_string(str, &conv));
+		el_free(re);
+	} else {
+		rv = 0;
+	}
+	return rv;
+#else
+	if (re_comp(ct_encode_string(pat, &conv)) != NULL)
+		return 0;
+	else
+		return re_exec(ct_encode_string(str, &conv)) == 1;
+#endif
+}
+
+
+/* c_hmatch():
+ *	 return True if the pattern matches the prefix
+ */
+libedit_private int
+c_hmatch(EditLine *el, const wchar_t *str)
+{
+#ifdef SDEBUG
+	(void) fprintf(el->el_errfile, "match `%s' with `%s'\n",
+	    el->el_search.patbuf, str);
+#endif /* SDEBUG */
+
+	return el_match(str, el->el_search.patbuf);
+}
+
+
+/* c_setpat():
+ *	Set the history seatch pattern
+ */
+libedit_private void
+c_setpat(EditLine *el)
+{
+	if (el->el_state.lastcmd != ED_SEARCH_PREV_HISTORY &&
+	    el->el_state.lastcmd != ED_SEARCH_NEXT_HISTORY) {
+		el->el_search.patlen =
+		    (size_t)(EL_CURSOR(el) - el->el_line.buffer);
+		if (el->el_search.patlen >= EL_BUFSIZ)
+			el->el_search.patlen = EL_BUFSIZ - 1;
+		if (el->el_search.patlen != 0) {
+			(void) wcsncpy(el->el_search.patbuf, el->el_line.buffer,
+			    el->el_search.patlen);
+			el->el_search.patbuf[el->el_search.patlen] = '\0';
+		} else
+			el->el_search.patlen = wcslen(el->el_search.patbuf);
+	}
+#ifdef SDEBUG
+	(void) fprintf(el->el_errfile, "\neventno = %d\n",
+	    el->el_history.eventno);
+	(void) fprintf(el->el_errfile, "patlen = %d\n", el->el_search.patlen);
+	(void) fprintf(el->el_errfile, "patbuf = \"%s\"\n",
+	    el->el_search.patbuf);
+	(void) fprintf(el->el_errfile, "cursor %d lastchar %d\n",
+	    EL_CURSOR(el) - el->el_line.buffer,
+	    el->el_line.lastchar - el->el_line.buffer);
+#endif
+}
+
+
+/* ce_inc_search():
+ *	Emacs incremental search
+ */
+libedit_private el_action_t
+ce_inc_search(EditLine *el, int dir)
+{
+	static const wchar_t STRfwd[] = L"fwd", STRbck[] = L"bck";
+	static wchar_t pchar = L':';  /* ':' = normal, '?' = failed */
+	static wchar_t endcmd[2] = {'\0', '\0'};
+	wchar_t *ocursor = el->el_line.cursor, oldpchar = pchar, ch;
+	const wchar_t *cp;
+
+	el_action_t ret = CC_NORM;
+
+	int ohisteventno = el->el_history.eventno;
+	size_t oldpatlen = el->el_search.patlen;
+	int newdir = dir;
+	int done, redo;
+
+	if (el->el_line.lastchar + sizeof(STRfwd) /
+	    sizeof(*el->el_line.lastchar) + 2 +
+	    el->el_search.patlen >= el->el_line.limit)
+		return CC_ERROR;
+
+	for (;;) {
+
+		if (el->el_search.patlen == 0) {	/* first round */
+			pchar = ':';
+#ifdef ANCHOR
+#define	LEN	2
+			el->el_search.patbuf[el->el_search.patlen++] = '.';
+			el->el_search.patbuf[el->el_search.patlen++] = '*';
+#else
+#define	LEN	0
+#endif
+		}
+		done = redo = 0;
+		*el->el_line.lastchar++ = '\n';
+		for (cp = (newdir == ED_SEARCH_PREV_HISTORY) ? STRbck : STRfwd;
+		    *cp; *el->el_line.lastchar++ = *cp++)
+			continue;
+		*el->el_line.lastchar++ = pchar;
+		for (cp = &el->el_search.patbuf[LEN];
+		    cp < &el->el_search.patbuf[el->el_search.patlen];
+		    *el->el_line.lastchar++ = *cp++)
+			continue;
+		*el->el_line.lastchar = '\0';
+		re_refresh(el);
+
+		if (el_wgetc(el, &ch) != 1)
+			return ed_end_of_file(el, 0);
+
+		switch (el->el_map.current[(unsigned char) ch]) {
+		case ED_INSERT:
+		case ED_DIGIT:
+			if (el->el_search.patlen >= EL_BUFSIZ - LEN)
+				terminal_beep(el);
+			else {
+				el->el_search.patbuf[el->el_search.patlen++] =
+				    ch;
+				*el->el_line.lastchar++ = ch;
+				*el->el_line.lastchar = '\0';
+				re_refresh(el);
+			}
+			break;
+
+		case EM_INC_SEARCH_NEXT:
+			newdir = ED_SEARCH_NEXT_HISTORY;
+			redo++;
+			break;
+
+		case EM_INC_SEARCH_PREV:
+			newdir = ED_SEARCH_PREV_HISTORY;
+			redo++;
+			break;
+
+		case EM_DELETE_PREV_CHAR:
+		case ED_DELETE_PREV_CHAR:
+			if (el->el_search.patlen > LEN)
+				done++;
+			else
+				terminal_beep(el);
+			break;
+
+		default:
+			switch (ch) {
+			case 0007:	/* ^G: Abort */
+				ret = CC_ERROR;
+				done++;
+				break;
+
+			case 0027:	/* ^W: Append word */
+			/* No can do if globbing characters in pattern */
+				for (cp = &el->el_search.patbuf[LEN];; cp++)
+				    if (cp >= &el->el_search.patbuf[
+					el->el_search.patlen]) {
+					el->el_line.cursor +=
+					    el->el_search.patlen - LEN - 1;
+					cp = c__next_word(el->el_line.cursor,
+					    el->el_line.lastchar, 1,
+					    ce__isword);
+					while (el->el_line.cursor < cp &&
+					    *el->el_line.cursor != '\n') {
+						if (el->el_search.patlen >=
+						    EL_BUFSIZ - LEN) {
+							terminal_beep(el);
+							break;
+						}
+						el->el_search.patbuf[el->el_search.patlen++] =
+						    *el->el_line.cursor;
+						*el->el_line.lastchar++ =
+						    *el->el_line.cursor++;
+					}
+					el->el_line.cursor = ocursor;
+					*el->el_line.lastchar = '\0';
+					re_refresh(el);
+					break;
+				    } else if (isglob(*cp)) {
+					    terminal_beep(el);
+					    break;
+				    }
+				break;
+
+			default:	/* Terminate and execute cmd */
+				endcmd[0] = ch;
+				el_wpush(el, endcmd);
+				/* FALLTHROUGH */
+
+			case 0033:	/* ESC: Terminate */
+				ret = CC_REFRESH;
+				done++;
+				break;
+			}
+			break;
+		}
+
+		while (el->el_line.lastchar > el->el_line.buffer &&
+		    *el->el_line.lastchar != '\n')
+			*el->el_line.lastchar-- = '\0';
+		*el->el_line.lastchar = '\0';
+
+		if (!done) {
+
+			/* Can't search if unmatched '[' */
+			for (cp = &el->el_search.patbuf[el->el_search.patlen-1],
+			    ch = L']';
+			    cp >= &el->el_search.patbuf[LEN];
+			    cp--)
+				if (*cp == '[' || *cp == ']') {
+					ch = *cp;
+					break;
+				}
+			if (el->el_search.patlen > LEN && ch != L'[') {
+				if (redo && newdir == dir) {
+					if (pchar == '?') { /* wrap around */
+						el->el_history.eventno =
+						    newdir == ED_SEARCH_PREV_HISTORY ? 0 : 0x7fffffff;
+						if (hist_get(el) == CC_ERROR)
+							/* el->el_history.event
+							 * no was fixed by
+							 * first call */
+							(void) hist_get(el);
+						el->el_line.cursor = newdir ==
+						    ED_SEARCH_PREV_HISTORY ?
+						    el->el_line.lastchar :
+						    el->el_line.buffer;
+					} else
+						el->el_line.cursor +=
+						    newdir ==
+						    ED_SEARCH_PREV_HISTORY ?
+						    -1 : 1;
+				}
+#ifdef ANCHOR
+				el->el_search.patbuf[el->el_search.patlen++] =
+				    '.';
+				el->el_search.patbuf[el->el_search.patlen++] =
+				    '*';
+#endif
+				el->el_search.patbuf[el->el_search.patlen] =
+				    '\0';
+				if (el->el_line.cursor < el->el_line.buffer ||
+				    el->el_line.cursor > el->el_line.lastchar ||
+				    (ret = ce_search_line(el, newdir))
+				    == CC_ERROR) {
+					/* avoid c_setpat */
+					el->el_state.lastcmd =
+					    (el_action_t) newdir;
+					ret = (el_action_t)
+					    (newdir == ED_SEARCH_PREV_HISTORY ?
+					    ed_search_prev_history(el, 0) :
+					    ed_search_next_history(el, 0));
+					if (ret != CC_ERROR) {
+						el->el_line.cursor = newdir ==
+						    ED_SEARCH_PREV_HISTORY ?
+						    el->el_line.lastchar :
+						    el->el_line.buffer;
+						(void) ce_search_line(el,
+						    newdir);
+					}
+				}
+				el->el_search.patlen -= LEN;
+				el->el_search.patbuf[el->el_search.patlen] =
+				    '\0';
+				if (ret == CC_ERROR) {
+					terminal_beep(el);
+					if (el->el_history.eventno !=
+					    ohisteventno) {
+						el->el_history.eventno =
+						    ohisteventno;
+						if (hist_get(el) == CC_ERROR)
+							return CC_ERROR;
+					}
+					el->el_line.cursor = ocursor;
+					pchar = '?';
+				} else {
+					pchar = ':';
+				}
+			}
+			ret = ce_inc_search(el, newdir);
+
+			if (ret == CC_ERROR && pchar == '?' && oldpchar == ':')
+				/*
+				 * break abort of failed search at last
+				 * non-failed
+				 */
+				ret = CC_NORM;
+
+		}
+		if (ret == CC_NORM || (ret == CC_ERROR && oldpatlen == 0)) {
+			/* restore on normal return or error exit */
+			pchar = oldpchar;
+			el->el_search.patlen = oldpatlen;
+			if (el->el_history.eventno != ohisteventno) {
+				el->el_history.eventno = ohisteventno;
+				if (hist_get(el) == CC_ERROR)
+					return CC_ERROR;
+			}
+			el->el_line.cursor = ocursor;
+			if (ret == CC_ERROR)
+				re_refresh(el);
+		}
+		if (done || ret != CC_NORM)
+			return ret;
+	}
+}
+
+
+/* cv_search():
+ *	Vi search.
+ */
+libedit_private el_action_t
+cv_search(EditLine *el, int dir)
+{
+	wchar_t ch;
+	wchar_t tmpbuf[EL_BUFSIZ];
+	ssize_t tmplen;
+
+#ifdef ANCHOR
+	tmpbuf[0] = '.';
+	tmpbuf[1] = '*';
+#endif
+	tmplen = LEN;
+
+	el->el_search.patdir = dir;
+
+	tmplen = c_gets(el, &tmpbuf[LEN],
+		dir == ED_SEARCH_PREV_HISTORY ? L"\n/" : L"\n?" );
+	if (tmplen == -1)
+		return CC_REFRESH;
+
+	tmplen += LEN;
+	ch = tmpbuf[tmplen];
+	tmpbuf[tmplen] = '\0';
+
+	if (tmplen == LEN) {
+		/*
+		 * Use the old pattern, but wild-card it.
+		 */
+		if (el->el_search.patlen == 0) {
+			re_refresh(el);
+			return CC_ERROR;
+		}
+#ifdef ANCHOR
+		if (el->el_search.patbuf[0] != '.' &&
+		    el->el_search.patbuf[0] != '*') {
+			(void) wcsncpy(tmpbuf, el->el_search.patbuf,
+			    sizeof(tmpbuf) / sizeof(*tmpbuf) - 1);
+			el->el_search.patbuf[0] = '.';
+			el->el_search.patbuf[1] = '*';
+			(void) wcsncpy(&el->el_search.patbuf[2], tmpbuf,
+			    EL_BUFSIZ - 3);
+			el->el_search.patlen++;
+			el->el_search.patbuf[el->el_search.patlen++] = '.';
+			el->el_search.patbuf[el->el_search.patlen++] = '*';
+			el->el_search.patbuf[el->el_search.patlen] = '\0';
+		}
+#endif
+	} else {
+#ifdef ANCHOR
+		tmpbuf[tmplen++] = '.';
+		tmpbuf[tmplen++] = '*';
+#endif
+		tmpbuf[tmplen] = '\0';
+		(void) wcsncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1);
+		el->el_search.patlen = (size_t)tmplen;
+	}
+	el->el_state.lastcmd = (el_action_t) dir;	/* avoid c_setpat */
+	el->el_line.cursor = el->el_line.lastchar = el->el_line.buffer;
+	if ((dir == ED_SEARCH_PREV_HISTORY ? ed_search_prev_history(el, 0) :
+	    ed_search_next_history(el, 0)) == CC_ERROR) {
+		re_refresh(el);
+		return CC_ERROR;
+	}
+	if (ch == 0033) {
+		re_refresh(el);
+		return ed_newline(el, 0);
+	}
+	return CC_REFRESH;
+}
+
+
+/* ce_search_line():
+ *	Look for a pattern inside a line
+ */
+libedit_private el_action_t
+ce_search_line(EditLine *el, int dir)
+{
+	wchar_t *cp = el->el_line.cursor;
+	wchar_t *pattern = el->el_search.patbuf;
+	wchar_t oc, *ocp;
+#ifdef ANCHOR
+	ocp = &pattern[1];
+	oc = *ocp;
+	*ocp = '^';
+#else
+	ocp = pattern;
+	oc = *ocp;
+#endif
+
+	if (dir == ED_SEARCH_PREV_HISTORY) {
+		for (; cp >= el->el_line.buffer; cp--) {
+			if (el_match(cp, ocp)) {
+				*ocp = oc;
+				el->el_line.cursor = cp;
+				return CC_NORM;
+			}
+		}
+		*ocp = oc;
+		return CC_ERROR;
+	} else {
+		for (; *cp != '\0' && cp < el->el_line.limit; cp++) {
+			if (el_match(cp, ocp)) {
+				*ocp = oc;
+				el->el_line.cursor = cp;
+				return CC_NORM;
+			}
+		}
+		*ocp = oc;
+		return CC_ERROR;
+	}
+}
+
+
+/* cv_repeat_srch():
+ *	Vi repeat search
+ */
+libedit_private el_action_t
+cv_repeat_srch(EditLine *el, wint_t c)
+{
+
+#ifdef SDEBUG
+	(void) fprintf(el->el_errfile, "dir %d patlen %d patbuf %s\n",
+	    c, el->el_search.patlen, ct_encode_string(el->el_search.patbuf));
+#endif
+
+	el->el_state.lastcmd = (el_action_t) c;	/* Hack to stop c_setpat */
+	el->el_line.lastchar = el->el_line.buffer;
+
+	switch (c) {
+	case ED_SEARCH_NEXT_HISTORY:
+		return ed_search_next_history(el, 0);
+	case ED_SEARCH_PREV_HISTORY:
+		return ed_search_prev_history(el, 0);
+	default:
+		return CC_ERROR;
+	}
+}
+
+
+/* cv_csearch():
+ *	Vi character search
+ */
+libedit_private el_action_t
+cv_csearch(EditLine *el, int direction, wint_t ch, int count, int tflag)
+{
+	wchar_t *cp;
+
+	if (ch == 0)
+		return CC_ERROR;
+
+	if (ch == (wint_t)-1) {
+		if (el_wgetc(el, &ch) != 1)
+			return ed_end_of_file(el, 0);
+	}
+
+	/* Save for ';' and ',' commands */
+	el->el_search.chacha = ch;
+	el->el_search.chadir = direction;
+	el->el_search.chatflg = (char)tflag;
+
+	cp = el->el_line.cursor;
+	while (count--) {
+		if ((wint_t)*cp == ch)
+			cp += direction;
+		for (;;cp += direction) {
+			if (cp >= el->el_line.lastchar)
+				return CC_ERROR;
+			if (cp < el->el_line.buffer)
+				return CC_ERROR;
+			if ((wint_t)*cp == ch)
+				break;
+		}
+	}
+
+	if (tflag)
+		cp -= direction;
+
+	el->el_line.cursor = cp;
+
+	if (el->el_chared.c_vcmd.action != NOP) {
+		if (direction > 0)
+			el->el_line.cursor++;
+		cv_delfini(el);
+		return CC_REFRESH;
+	}
+	return CC_CURSOR;
+}