644 lines
15 KiB
C
644 lines
15 KiB
C
/* $NetBSD: search.c,v 1.31 2016/01/30 04:02:51 christos Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Christos Zoulas of Cornell University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "config.h"
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#if !defined(lint) && !defined(SCCSID)
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#if 0
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static char sccsid[] = "@(#)search.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: search.c,v 1.31 2016/01/30 04:02:51 christos Exp $");
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#endif
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#endif /* not lint && not SCCSID */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* search.c: History and character search functions
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*/
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#include <stdlib.h>
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#if defined(REGEX)
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#include <regex.h>
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#elif defined(REGEXP)
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#include <regexp.h>
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#endif
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#include "el.h"
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/*
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* Adjust cursor in vi mode to include the character under it
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*/
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#define EL_CURSOR(el) \
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((el)->el_line.cursor + (((el)->el_map.type == MAP_VI) && \
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((el)->el_map.current == (el)->el_map.alt)))
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/* search_init():
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* Initialize the search stuff
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*/
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protected int
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search_init(EditLine *el)
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{
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el->el_search.patbuf = el_malloc(EL_BUFSIZ *
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sizeof(*el->el_search.patbuf));
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if (el->el_search.patbuf == NULL)
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return -1;
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el->el_search.patlen = 0;
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el->el_search.patdir = -1;
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el->el_search.chacha = '\0';
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el->el_search.chadir = CHAR_FWD;
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el->el_search.chatflg = 0;
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return 0;
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}
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/* search_end():
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* Initialize the search stuff
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*/
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protected void
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search_end(EditLine *el)
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{
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el_free(el->el_search.patbuf);
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el->el_search.patbuf = NULL;
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}
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#ifdef REGEXP
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/* regerror():
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* Handle regular expression errors
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*/
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public void
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/*ARGSUSED*/
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regerror(const char *msg)
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{
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}
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#endif
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/* el_match():
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* Return if string matches pattern
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*/
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protected int
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el_match(const Char *str, const Char *pat)
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{
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#ifdef WIDECHAR
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static ct_buffer_t conv;
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#endif
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#if defined (REGEX)
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regex_t re;
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int rv;
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#elif defined (REGEXP)
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regexp *rp;
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int rv;
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#else
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extern char *re_comp(const char *);
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extern int re_exec(const char *);
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#endif
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if (Strstr(str, pat) != 0)
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return 1;
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#if defined(REGEX)
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if (regcomp(&re, ct_encode_string(pat, &conv), 0) == 0) {
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rv = regexec(&re, ct_encode_string(str, &conv), (size_t)0, NULL,
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0) == 0;
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regfree(&re);
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} else {
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rv = 0;
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}
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return rv;
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#elif defined(REGEXP)
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if ((re = regcomp(ct_encode_string(pat, &conv))) != NULL) {
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rv = regexec(re, ct_encode_string(str, &conv));
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el_free(re);
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} else {
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rv = 0;
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}
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return rv;
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#else
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if (re_comp(ct_encode_string(pat, &conv)) != NULL)
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return 0;
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else
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return re_exec(ct_encode_string(str, &conv)) == 1;
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#endif
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}
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/* c_hmatch():
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* return True if the pattern matches the prefix
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*/
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protected int
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c_hmatch(EditLine *el, const Char *str)
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{
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#ifdef SDEBUG
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(void) fprintf(el->el_errfile, "match `%s' with `%s'\n",
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el->el_search.patbuf, str);
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#endif /* SDEBUG */
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return el_match(str, el->el_search.patbuf);
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}
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/* c_setpat():
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* Set the history seatch pattern
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*/
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protected void
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c_setpat(EditLine *el)
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{
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if (el->el_state.lastcmd != ED_SEARCH_PREV_HISTORY &&
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el->el_state.lastcmd != ED_SEARCH_NEXT_HISTORY) {
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el->el_search.patlen =
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(size_t)(EL_CURSOR(el) - el->el_line.buffer);
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if (el->el_search.patlen >= EL_BUFSIZ)
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el->el_search.patlen = EL_BUFSIZ - 1;
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if (el->el_search.patlen != 0) {
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(void) Strncpy(el->el_search.patbuf, el->el_line.buffer,
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el->el_search.patlen);
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el->el_search.patbuf[el->el_search.patlen] = '\0';
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} else
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el->el_search.patlen = Strlen(el->el_search.patbuf);
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}
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#ifdef SDEBUG
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(void) fprintf(el->el_errfile, "\neventno = %d\n",
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el->el_history.eventno);
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(void) fprintf(el->el_errfile, "patlen = %d\n", el->el_search.patlen);
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(void) fprintf(el->el_errfile, "patbuf = \"%s\"\n",
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el->el_search.patbuf);
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(void) fprintf(el->el_errfile, "cursor %d lastchar %d\n",
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EL_CURSOR(el) - el->el_line.buffer,
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el->el_line.lastchar - el->el_line.buffer);
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#endif
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}
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/* ce_inc_search():
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* Emacs incremental search
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*/
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protected el_action_t
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ce_inc_search(EditLine *el, int dir)
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{
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static const Char STRfwd[] = {'f', 'w', 'd', '\0'},
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STRbck[] = {'b', 'c', 'k', '\0'};
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static Char pchar = ':';/* ':' = normal, '?' = failed */
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static Char endcmd[2] = {'\0', '\0'};
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Char ch, *ocursor = el->el_line.cursor, oldpchar = pchar;
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const Char *cp;
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el_action_t ret = CC_NORM;
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int ohisteventno = el->el_history.eventno;
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size_t oldpatlen = el->el_search.patlen;
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int newdir = dir;
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int done, redo;
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if (el->el_line.lastchar + sizeof(STRfwd) /
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sizeof(*el->el_line.lastchar) + 2 +
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el->el_search.patlen >= el->el_line.limit)
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return CC_ERROR;
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for (;;) {
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if (el->el_search.patlen == 0) { /* first round */
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pchar = ':';
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#ifdef ANCHOR
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#define LEN 2
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el->el_search.patbuf[el->el_search.patlen++] = '.';
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el->el_search.patbuf[el->el_search.patlen++] = '*';
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#else
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#define LEN 0
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#endif
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}
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done = redo = 0;
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*el->el_line.lastchar++ = '\n';
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for (cp = (newdir == ED_SEARCH_PREV_HISTORY) ? STRbck : STRfwd;
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*cp; *el->el_line.lastchar++ = *cp++)
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continue;
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*el->el_line.lastchar++ = pchar;
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for (cp = &el->el_search.patbuf[LEN];
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cp < &el->el_search.patbuf[el->el_search.patlen];
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*el->el_line.lastchar++ = *cp++)
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continue;
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*el->el_line.lastchar = '\0';
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re_refresh(el);
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if (FUN(el,getc)(el, &ch) != 1)
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return ed_end_of_file(el, 0);
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switch (el->el_map.current[(unsigned char) ch]) {
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case ED_INSERT:
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case ED_DIGIT:
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if (el->el_search.patlen >= EL_BUFSIZ - LEN)
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terminal_beep(el);
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else {
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el->el_search.patbuf[el->el_search.patlen++] =
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ch;
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*el->el_line.lastchar++ = ch;
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*el->el_line.lastchar = '\0';
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re_refresh(el);
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}
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break;
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case EM_INC_SEARCH_NEXT:
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newdir = ED_SEARCH_NEXT_HISTORY;
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redo++;
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break;
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case EM_INC_SEARCH_PREV:
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newdir = ED_SEARCH_PREV_HISTORY;
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redo++;
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break;
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case EM_DELETE_PREV_CHAR:
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case ED_DELETE_PREV_CHAR:
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if (el->el_search.patlen > LEN)
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done++;
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else
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terminal_beep(el);
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break;
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default:
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switch (ch) {
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case 0007: /* ^G: Abort */
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ret = CC_ERROR;
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done++;
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break;
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case 0027: /* ^W: Append word */
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/* No can do if globbing characters in pattern */
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for (cp = &el->el_search.patbuf[LEN];; cp++)
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if (cp >= &el->el_search.patbuf[
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el->el_search.patlen]) {
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el->el_line.cursor +=
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el->el_search.patlen - LEN - 1;
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cp = c__next_word(el->el_line.cursor,
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el->el_line.lastchar, 1,
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ce__isword);
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while (el->el_line.cursor < cp &&
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*el->el_line.cursor != '\n') {
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if (el->el_search.patlen >=
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EL_BUFSIZ - LEN) {
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terminal_beep(el);
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break;
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}
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el->el_search.patbuf[el->el_search.patlen++] =
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*el->el_line.cursor;
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*el->el_line.lastchar++ =
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*el->el_line.cursor++;
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}
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el->el_line.cursor = ocursor;
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*el->el_line.lastchar = '\0';
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re_refresh(el);
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break;
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} else if (isglob(*cp)) {
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terminal_beep(el);
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break;
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}
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break;
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default: /* Terminate and execute cmd */
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endcmd[0] = ch;
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FUN(el,push)(el, endcmd);
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/* FALLTHROUGH */
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case 0033: /* ESC: Terminate */
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ret = CC_REFRESH;
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done++;
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break;
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}
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break;
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}
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while (el->el_line.lastchar > el->el_line.buffer &&
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*el->el_line.lastchar != '\n')
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*el->el_line.lastchar-- = '\0';
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*el->el_line.lastchar = '\0';
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if (!done) {
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/* Can't search if unmatched '[' */
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for (cp = &el->el_search.patbuf[el->el_search.patlen-1],
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ch = ']';
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cp >= &el->el_search.patbuf[LEN];
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cp--)
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if (*cp == '[' || *cp == ']') {
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ch = *cp;
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break;
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}
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if (el->el_search.patlen > LEN && ch != '[') {
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if (redo && newdir == dir) {
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if (pchar == '?') { /* wrap around */
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el->el_history.eventno =
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newdir == ED_SEARCH_PREV_HISTORY ? 0 : 0x7fffffff;
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if (hist_get(el) == CC_ERROR)
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/* el->el_history.event
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* no was fixed by
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* first call */
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(void) hist_get(el);
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el->el_line.cursor = newdir ==
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ED_SEARCH_PREV_HISTORY ?
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el->el_line.lastchar :
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el->el_line.buffer;
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} else
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el->el_line.cursor +=
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newdir ==
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ED_SEARCH_PREV_HISTORY ?
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-1 : 1;
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}
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#ifdef ANCHOR
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el->el_search.patbuf[el->el_search.patlen++] =
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'.';
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el->el_search.patbuf[el->el_search.patlen++] =
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'*';
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#endif
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el->el_search.patbuf[el->el_search.patlen] =
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'\0';
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if (el->el_line.cursor < el->el_line.buffer ||
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el->el_line.cursor > el->el_line.lastchar ||
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(ret = ce_search_line(el, newdir))
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== CC_ERROR) {
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/* avoid c_setpat */
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el->el_state.lastcmd =
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(el_action_t) newdir;
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ret = (el_action_t)
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(newdir == ED_SEARCH_PREV_HISTORY ?
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ed_search_prev_history(el, 0) :
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ed_search_next_history(el, 0));
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if (ret != CC_ERROR) {
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el->el_line.cursor = newdir ==
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ED_SEARCH_PREV_HISTORY ?
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el->el_line.lastchar :
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el->el_line.buffer;
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(void) ce_search_line(el,
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newdir);
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}
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}
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el->el_search.patlen -= LEN;
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el->el_search.patbuf[el->el_search.patlen] =
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'\0';
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if (ret == CC_ERROR) {
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terminal_beep(el);
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if (el->el_history.eventno !=
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ohisteventno) {
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el->el_history.eventno =
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ohisteventno;
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if (hist_get(el) == CC_ERROR)
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return CC_ERROR;
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}
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el->el_line.cursor = ocursor;
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pchar = '?';
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} else {
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pchar = ':';
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}
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}
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ret = ce_inc_search(el, newdir);
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if (ret == CC_ERROR && pchar == '?' && oldpchar == ':')
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/*
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* break abort of failed search at last
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* non-failed
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*/
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ret = CC_NORM;
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}
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if (ret == CC_NORM || (ret == CC_ERROR && oldpatlen == 0)) {
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/* restore on normal return or error exit */
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pchar = oldpchar;
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el->el_search.patlen = oldpatlen;
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if (el->el_history.eventno != ohisteventno) {
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el->el_history.eventno = ohisteventno;
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if (hist_get(el) == CC_ERROR)
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return CC_ERROR;
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}
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el->el_line.cursor = ocursor;
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if (ret == CC_ERROR)
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re_refresh(el);
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}
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if (done || ret != CC_NORM)
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return ret;
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}
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}
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/* cv_search():
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* Vi search.
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*/
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protected el_action_t
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cv_search(EditLine *el, int dir)
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{
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Char ch;
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Char tmpbuf[EL_BUFSIZ];
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ssize_t tmplen;
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#ifdef ANCHOR
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tmpbuf[0] = '.';
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tmpbuf[1] = '*';
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#endif
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tmplen = LEN;
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el->el_search.patdir = dir;
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tmplen = c_gets(el, &tmpbuf[LEN],
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dir == ED_SEARCH_PREV_HISTORY ? STR("\n/") : STR("\n?") );
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if (tmplen == -1)
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return CC_REFRESH;
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tmplen += LEN;
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ch = tmpbuf[tmplen];
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tmpbuf[tmplen] = '\0';
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if (tmplen == LEN) {
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/*
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* Use the old pattern, but wild-card it.
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*/
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if (el->el_search.patlen == 0) {
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re_refresh(el);
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return CC_ERROR;
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}
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#ifdef ANCHOR
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if (el->el_search.patbuf[0] != '.' &&
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el->el_search.patbuf[0] != '*') {
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(void) Strncpy(tmpbuf, el->el_search.patbuf,
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sizeof(tmpbuf) / sizeof(*tmpbuf) - 1);
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el->el_search.patbuf[0] = '.';
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el->el_search.patbuf[1] = '*';
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(void) Strncpy(&el->el_search.patbuf[2], tmpbuf,
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EL_BUFSIZ - 3);
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el->el_search.patlen++;
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el->el_search.patbuf[el->el_search.patlen++] = '.';
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el->el_search.patbuf[el->el_search.patlen++] = '*';
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el->el_search.patbuf[el->el_search.patlen] = '\0';
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}
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#endif
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} else {
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#ifdef ANCHOR
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tmpbuf[tmplen++] = '.';
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tmpbuf[tmplen++] = '*';
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#endif
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tmpbuf[tmplen] = '\0';
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(void) Strncpy(el->el_search.patbuf, tmpbuf, EL_BUFSIZ - 1);
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el->el_search.patlen = (size_t)tmplen;
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}
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el->el_state.lastcmd = (el_action_t) dir; /* avoid c_setpat */
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|
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 == (Int)-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 = (char)tflag;
|
|
|
|
cp = el->el_line.cursor;
|
|
while (count--) {
|
|
if ((Int)*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 ((Int)*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;
|
|
}
|