/lib/nbsd_libedit/search.c
C | 638 lines | 485 code | 65 blank | 88 comment | 140 complexity | bffd8fa5d9eea351d0cbfd7a64efa545 MD5 | raw file
Possible License(s): AGPL-1.0, BSD-3-Clause
- /* $NetBSD: search.c,v 1.24 2010/04/15 00:57:33 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 1.24 2010/04/15 00:57:33 christos Exp $");
- #endif
- #endif /* not lint && not SCCSID */
- /*
- * search.c: History and character search functions
- */
- #include <stdlib.h>
- #if defined(REGEX)
- #include <regex.h>
- #elif defined(REGEXP)
- #include <regexp.h>
- #endif
- #include "el.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
- */
- protected 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.patlen = 0;
- el->el_search.patdir = -1;
- el->el_search.chacha = '\0';
- el->el_search.chadir = CHAR_FWD;
- el->el_search.chatflg = 0;
- return (0);
- }
- /* search_end():
- * Initialize the search stuff
- */
- protected void
- search_end(EditLine *el)
- {
- el_free((ptr_t) el->el_search.patbuf);
- el->el_search.patbuf = NULL;
- }
- #ifdef REGEXP
- /* regerror():
- * Handle regular expression errors
- */
- public void
- /*ARGSUSED*/
- regerror(const char *msg)
- {
- }
- #endif
- /* el_match():
- * Return if string matches pattern
- */
- protected int
- el_match(const Char *str, const Char *pat)
- {
- #ifdef WIDECHAR
- static ct_buffer_t conv;
- #endif
- #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 (Strstr(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), 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));
- free((ptr_t) 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
- */
- protected int
- c_hmatch(EditLine *el, const Char *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
- */
- protected 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 = 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) Strncpy(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 = Strlen(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
- */
- protected el_action_t
- ce_inc_search(EditLine *el, int dir)
- {
- static const Char STRfwd[] = {'f', 'w', 'd', '\0'},
- STRbck[] = {'b', 'c', 'k', '\0'};
- static Char pchar = ':';/* ':' = normal, '?' = failed */
- static Char endcmd[2] = {'\0', '\0'};
- Char ch, *ocursor = el->el_line.cursor, oldpchar = pchar;
- const Char *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 (FUN(el,getc)(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)
- term_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
- term_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) {
- term_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)) {
- term_beep(el);
- break;
- }
- break;
- default: /* Terminate and execute cmd */
- endcmd[0] = ch;
- FUN(el,push)(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 = ']';
- cp >= &el->el_search.patbuf[LEN];
- cp--)
- if (*cp == '[' || *cp == ']') {
- ch = *cp;
- break;
- }
- if (el->el_search.patlen > LEN && ch != '[') {
- 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 = 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) {
- term_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.
- */
- protected el_action_t
- cv_search(EditLine *el, int dir)
- {
- Char ch;
- Char tmpbuf[EL_BUFSIZ];
- int 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 ? STR("\n/") : STR("\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) Strncpy(tmpbuf, el->el_search.patbuf,
- sizeof(tmpbuf) / sizeof(*tmpbuf) - 1);
- el->el_search.patbuf[0] = '.';
- el->el_search.patbuf[1] = '*';
- (void) Strncpy(&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) Strncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1);
- el->el_search.patlen = 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
- */
- protected el_action_t
- ce_search_line(EditLine *el, int dir)
- {
- Char *cp = el->el_line.cursor;
- Char *pattern = el->el_search.patbuf;
- Char 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
- */
- protected el_action_t
- cv_repeat_srch(EditLine *el, Int 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
- */
- protected el_action_t
- cv_csearch(EditLine *el, int direction, Int ch, int count, int tflag)
- {
- Char *cp;
- if (ch == 0)
- return CC_ERROR;
- if (ch == -1) {
- Char c;
- if (FUN(el,getc)(el, &c) != 1)
- return ed_end_of_file(el, 0);
- ch = c;
- }
- /* Save for ';' and ',' commands */
- el->el_search.chacha = ch;
- el->el_search.chadir = direction;
- el->el_search.chatflg = tflag;
- cp = el->el_line.cursor;
- while (count--) {
- if (*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 (*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;
- }