39f224af48
The posix 'sh' specification defines vi-mode editing quite tightly. The netbsd libedit code (used by sh to do this) was missing several features, there were also minor errors in others. Compare netbsd sh to the definition available from: http://www.opengroup.org/onlinepubs/007904975/utilities/sh.html In particular the following were not supported: U - undo all changes to line | - goto column Y - yank to end of line y - yank # - comment out current line @ - take input from shell alias [1] G - goto numbered line in history buffer v - edit history line with vi _ - append word from last input line . - redo last command Other minor changes have also been made. [1] This needs the shell to define an appropriate routine to return the text of the alias. There is no requirement that such a function exist.
635 lines
15 KiB
C
635 lines
15 KiB
C
/* $NetBSD: search.c,v 1.13 2002/11/15 14:32:34 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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 1.13 2002/11/15 14:32:34 christos Exp $");
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#endif
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#endif /* not lint && not SCCSID */
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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 = (char *) el_malloc(EL_BUFSIZ);
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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((ptr_t) 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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#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) != NULL)
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return (1);
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#if defined(REGEX)
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if (regcomp(&re, pat, 0) == 0) {
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rv = regexec(&re, str, 0, NULL, 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(pat)) != NULL) {
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rv = regexec(re, str);
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free((ptr_t) 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(pat) != NULL)
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return (0);
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else
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return (re_exec(str) == 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 = 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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int 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) / sizeof(char) + 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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el->el_search.patbuf[el->el_search.patlen++] = '.';
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el->el_search.patbuf[el->el_search.patlen++] = '*';
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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[1];
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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 (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 - 3)
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term_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 ED_DELETE_PREV_CHAR:
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if (el->el_search.patlen > 1)
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done++;
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else
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term_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[1];; cp++)
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if (cp >= &el->el_search.patbuf[el->el_search.patlen]) {
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el->el_line.cursor +=
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el->el_search.patlen - 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 - 3) {
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term_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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term_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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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;
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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 > 1 && 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,
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&el->el_search.patbuf[1],
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newdir)) == 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 = 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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&el->el_search.patbuf[1],
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newdir);
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}
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}
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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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term_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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int tmplen;
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tmplen = 0;
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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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el->el_line.buffer[0] = '\0';
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el->el_line.lastchar = el->el_line.buffer;
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el->el_line.cursor = el->el_line.buffer;
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el->el_search.patdir = dir;
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c_insert(el, 2); /* prompt + '\n' */
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*el->el_line.cursor++ = '\n';
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*el->el_line.cursor++ = dir == ED_SEARCH_PREV_HISTORY ? '/' : '?';
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re_refresh(el);
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#ifdef ANCHOR
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#define LEN 2
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#else
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#define LEN 0
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#endif
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tmplen = c_gets(el, &tmpbuf[LEN]) + 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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el->el_line.buffer[0] = '\0';
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el->el_line.lastchar = el->el_line.buffer;
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el->el_line.cursor = el->el_line.buffer;
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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) - 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++] = '*';
|
|
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);
|
|
} else {
|
|
if (ch == 0033) {
|
|
re_refresh(el);
|
|
*el->el_line.lastchar++ = '\n';
|
|
*el->el_line.lastchar = '\0';
|
|
re_goto_bottom(el);
|
|
return (CC_NEWLINE);
|
|
} else
|
|
return (CC_REFRESH);
|
|
}
|
|
}
|
|
|
|
|
|
/* ce_search_line():
|
|
* Look for a pattern inside a line
|
|
*/
|
|
protected el_action_t
|
|
ce_search_line(EditLine *el, char *pattern, int dir)
|
|
{
|
|
char *cp;
|
|
|
|
if (dir == ED_SEARCH_PREV_HISTORY) {
|
|
for (cp = el->el_line.cursor; cp >= el->el_line.buffer; cp--)
|
|
if (el_match(cp, pattern)) {
|
|
el->el_line.cursor = cp;
|
|
return (CC_NORM);
|
|
}
|
|
return (CC_ERROR);
|
|
} else {
|
|
for (cp = el->el_line.cursor; *cp != '\0' &&
|
|
cp < el->el_line.limit; cp++)
|
|
if (el_match(cp, pattern)) {
|
|
el->el_line.cursor = cp;
|
|
return (CC_NORM);
|
|
}
|
|
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, 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 (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;
|
|
}
|