5836a818ec
This reverts commitb558ff043d. This reverts commit4a11f20659. The initial import commit failed to retain local changes made to readline's configure.in (and the commit message erroneously stated that there were no local changes that needed to be reapplied). Also the import caused a couple of build errors and a scattering of testsuite regressions throughout many arches. It's probably better to start over with this import, hopefully more carefully next time.
697 lines
20 KiB
C
697 lines
20 KiB
C
/* isearch.c - incremental searching */
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/* **************************************************************** */
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/* */
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/* I-Search and Searching */
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/* */
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/* **************************************************************** */
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/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library (Readline), a library
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for reading lines of text with interactive input and history editing.
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Readline is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Readline is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Readline. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <sys/types.h>
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#include <stdio.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif
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#include "rldefs.h"
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#include "rlmbutil.h"
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#include "readline.h"
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#include "history.h"
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#include "rlprivate.h"
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#include "xmalloc.h"
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/* Variables exported to other files in the readline library. */
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char *_rl_isearch_terminators = (char *)NULL;
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_rl_search_cxt *_rl_iscxt = 0;
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/* Variables imported from other files in the readline library. */
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extern HIST_ENTRY *_rl_saved_line_for_history;
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static int rl_search_history PARAMS((int, int));
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static _rl_search_cxt *_rl_isearch_init PARAMS((int));
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static void _rl_isearch_fini PARAMS((_rl_search_cxt *));
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static int _rl_isearch_cleanup PARAMS((_rl_search_cxt *, int));
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/* Last line found by the current incremental search, so we don't `find'
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identical lines many times in a row. Now part of isearch context. */
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/* static char *prev_line_found; */
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/* Last search string and its length. */
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static char *last_isearch_string;
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static int last_isearch_string_len;
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static char * const default_isearch_terminators = "\033\012";
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_rl_search_cxt *
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_rl_scxt_alloc (type, flags)
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int type, flags;
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{
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_rl_search_cxt *cxt;
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cxt = (_rl_search_cxt *)xmalloc (sizeof (_rl_search_cxt));
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cxt->type = type;
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cxt->sflags = flags;
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cxt->search_string = 0;
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cxt->search_string_size = cxt->search_string_index = 0;
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cxt->lines = 0;
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cxt->allocated_line = 0;
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cxt->hlen = cxt->hindex = 0;
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cxt->save_point = rl_point;
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cxt->save_mark = rl_mark;
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cxt->save_line = where_history ();
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cxt->last_found_line = cxt->save_line;
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cxt->prev_line_found = 0;
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cxt->save_undo_list = 0;
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cxt->keymap = _rl_keymap;
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cxt->okeymap = _rl_keymap;
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cxt->history_pos = 0;
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cxt->direction = 0;
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cxt->lastc = 0;
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cxt->sline = 0;
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cxt->sline_len = cxt->sline_index = 0;
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cxt->search_terminators = 0;
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return cxt;
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}
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void
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_rl_scxt_dispose (cxt, flags)
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_rl_search_cxt *cxt;
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int flags;
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{
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FREE (cxt->search_string);
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FREE (cxt->allocated_line);
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FREE (cxt->lines);
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xfree (cxt);
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}
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/* Search backwards through the history looking for a string which is typed
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interactively. Start with the current line. */
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int
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rl_reverse_search_history (sign, key)
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int sign, key;
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{
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return (rl_search_history (-sign, key));
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}
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/* Search forwards through the history looking for a string which is typed
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interactively. Start with the current line. */
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int
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rl_forward_search_history (sign, key)
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int sign, key;
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{
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return (rl_search_history (sign, key));
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}
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/* Display the current state of the search in the echo-area.
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SEARCH_STRING contains the string that is being searched for,
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DIRECTION is zero for forward, or non-zero for reverse,
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WHERE is the history list number of the current line. If it is
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-1, then this line is the starting one. */
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static void
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rl_display_search (search_string, reverse_p, where)
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char *search_string;
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int reverse_p, where;
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{
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char *message;
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int msglen, searchlen;
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searchlen = (search_string && *search_string) ? strlen (search_string) : 0;
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message = (char *)xmalloc (searchlen + 33);
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msglen = 0;
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#if defined (NOTDEF)
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if (where != -1)
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{
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sprintf (message, "[%d]", where + history_base);
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msglen = strlen (message);
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}
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#endif /* NOTDEF */
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message[msglen++] = '(';
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if (reverse_p)
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{
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strcpy (message + msglen, "reverse-");
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msglen += 8;
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}
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strcpy (message + msglen, "i-search)`");
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msglen += 10;
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if (search_string)
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{
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strcpy (message + msglen, search_string);
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msglen += searchlen;
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}
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strcpy (message + msglen, "': ");
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rl_message ("%s", message);
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xfree (message);
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(*rl_redisplay_function) ();
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}
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static _rl_search_cxt *
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_rl_isearch_init (direction)
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int direction;
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{
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_rl_search_cxt *cxt;
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register int i;
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HIST_ENTRY **hlist;
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cxt = _rl_scxt_alloc (RL_SEARCH_ISEARCH, 0);
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if (direction < 0)
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cxt->sflags |= SF_REVERSE;
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cxt->search_terminators = _rl_isearch_terminators ? _rl_isearch_terminators
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: default_isearch_terminators;
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/* Create an arrary of pointers to the lines that we want to search. */
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hlist = history_list ();
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rl_maybe_replace_line ();
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i = 0;
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if (hlist)
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for (i = 0; hlist[i]; i++);
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/* Allocate space for this many lines, +1 for the current input line,
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and remember those lines. */
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cxt->lines = (char **)xmalloc ((1 + (cxt->hlen = i)) * sizeof (char *));
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for (i = 0; i < cxt->hlen; i++)
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cxt->lines[i] = hlist[i]->line;
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if (_rl_saved_line_for_history)
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cxt->lines[i] = _rl_saved_line_for_history->line;
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else
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{
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/* Keep track of this so we can free it. */
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cxt->allocated_line = (char *)xmalloc (1 + strlen (rl_line_buffer));
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strcpy (cxt->allocated_line, &rl_line_buffer[0]);
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cxt->lines[i] = cxt->allocated_line;
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}
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cxt->hlen++;
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/* The line where we start the search. */
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cxt->history_pos = cxt->save_line;
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rl_save_prompt ();
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/* Initialize search parameters. */
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cxt->search_string = (char *)xmalloc (cxt->search_string_size = 128);
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cxt->search_string[cxt->search_string_index = 0] = '\0';
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/* Normalize DIRECTION into 1 or -1. */
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cxt->direction = (direction >= 0) ? 1 : -1;
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cxt->sline = rl_line_buffer;
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cxt->sline_len = strlen (cxt->sline);
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cxt->sline_index = rl_point;
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_rl_iscxt = cxt; /* save globally */
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return cxt;
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}
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static void
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_rl_isearch_fini (cxt)
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_rl_search_cxt *cxt;
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{
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/* First put back the original state. */
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strcpy (rl_line_buffer, cxt->lines[cxt->save_line]);
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rl_restore_prompt ();
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/* Save the search string for possible later use. */
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FREE (last_isearch_string);
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last_isearch_string = cxt->search_string;
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last_isearch_string_len = cxt->search_string_index;
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cxt->search_string = 0;
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if (cxt->last_found_line < cxt->save_line)
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rl_get_previous_history (cxt->save_line - cxt->last_found_line, 0);
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else
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rl_get_next_history (cxt->last_found_line - cxt->save_line, 0);
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/* If the string was not found, put point at the end of the last matching
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line. If last_found_line == orig_line, we didn't find any matching
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history lines at all, so put point back in its original position. */
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if (cxt->sline_index < 0)
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{
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if (cxt->last_found_line == cxt->save_line)
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cxt->sline_index = cxt->save_point;
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else
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cxt->sline_index = strlen (rl_line_buffer);
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rl_mark = cxt->save_mark;
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}
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rl_point = cxt->sline_index;
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/* Don't worry about where to put the mark here; rl_get_previous_history
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and rl_get_next_history take care of it. */
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rl_clear_message ();
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}
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int
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_rl_search_getchar (cxt)
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_rl_search_cxt *cxt;
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{
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int c;
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/* Read a key and decide how to proceed. */
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RL_SETSTATE(RL_STATE_MOREINPUT);
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c = cxt->lastc = rl_read_key ();
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RL_UNSETSTATE(RL_STATE_MOREINPUT);
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#if defined (HANDLE_MULTIBYTE)
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if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
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c = cxt->lastc = _rl_read_mbstring (cxt->lastc, cxt->mb, MB_LEN_MAX);
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#endif
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return c;
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}
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/* Process just-read character C according to isearch context CXT. Return
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-1 if the caller should just free the context and return, 0 if we should
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break out of the loop, and 1 if we should continue to read characters. */
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int
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_rl_isearch_dispatch (cxt, c)
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_rl_search_cxt *cxt;
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int c;
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{
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int n, wstart, wlen, limit, cval;
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rl_command_func_t *f;
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f = (rl_command_func_t *)NULL;
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if (c < 0)
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{
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cxt->sflags |= SF_FAILED;
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cxt->history_pos = cxt->last_found_line;
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return -1;
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}
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/* If we are moving into a new keymap, modify cxt->keymap and go on.
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This can be a problem if c == ESC and we want to terminate the
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incremental search, so we check */
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if (c >= 0 && cxt->keymap[c].type == ISKMAP && strchr (cxt->search_terminators, cxt->lastc) == 0)
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{
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cxt->keymap = FUNCTION_TO_KEYMAP (cxt->keymap, c);
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cxt->sflags |= SF_CHGKMAP;
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/* XXX - we should probably save this sequence, so we can do
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something useful if this doesn't end up mapping to a command. */
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return 1;
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}
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/* Translate the keys we do something with to opcodes. */
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if (c >= 0 && cxt->keymap[c].type == ISFUNC)
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{
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f = cxt->keymap[c].function;
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if (f == rl_reverse_search_history)
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cxt->lastc = (cxt->sflags & SF_REVERSE) ? -1 : -2;
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else if (f == rl_forward_search_history)
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cxt->lastc = (cxt->sflags & SF_REVERSE) ? -2 : -1;
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else if (f == rl_rubout)
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cxt->lastc = -3;
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else if (c == CTRL ('G') || f == rl_abort)
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cxt->lastc = -4;
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else if (c == CTRL ('W') || f == rl_unix_word_rubout) /* XXX */
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cxt->lastc = -5;
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else if (c == CTRL ('Y') || f == rl_yank) /* XXX */
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cxt->lastc = -6;
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}
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/* If we changed the keymap earlier while translating a key sequence into
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a command, restore it now that we've succeeded. */
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if (cxt->sflags & SF_CHGKMAP)
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{
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cxt->keymap = cxt->okeymap;
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cxt->sflags &= ~SF_CHGKMAP;
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}
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/* The characters in isearch_terminators (set from the user-settable
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variable isearch-terminators) are used to terminate the search but
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not subsequently execute the character as a command. The default
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value is "\033\012" (ESC and C-J). */
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if (cxt->lastc > 0 && strchr (cxt->search_terminators, cxt->lastc))
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{
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/* ESC still terminates the search, but if there is pending
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input or if input arrives within 0.1 seconds (on systems
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with select(2)) it is used as a prefix character
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with rl_execute_next. WATCH OUT FOR THIS! This is intended
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to allow the arrow keys to be used like ^F and ^B are used
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to terminate the search and execute the movement command.
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XXX - since _rl_input_available depends on the application-
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settable keyboard timeout value, this could alternatively
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use _rl_input_queued(100000) */
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if (cxt->lastc == ESC && _rl_input_available ())
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rl_execute_next (ESC);
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return (0);
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}
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#define ENDSRCH_CHAR(c) \
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((CTRL_CHAR (c) || META_CHAR (c) || (c) == RUBOUT) && ((c) != CTRL ('G')))
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#if defined (HANDLE_MULTIBYTE)
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if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
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{
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if (cxt->lastc >= 0 && (cxt->mb[0] && cxt->mb[1] == '\0') && ENDSRCH_CHAR (cxt->lastc))
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{
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/* This sets rl_pending_input to LASTC; it will be picked up the next
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time rl_read_key is called. */
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rl_execute_next (cxt->lastc);
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return (0);
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}
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}
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else
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#endif
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if (cxt->lastc >= 0 && ENDSRCH_CHAR (cxt->lastc))
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{
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/* This sets rl_pending_input to LASTC; it will be picked up the next
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time rl_read_key is called. */
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rl_execute_next (cxt->lastc);
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return (0);
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}
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/* Now dispatch on the character. `Opcodes' affect the search string or
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state. Other characters are added to the string. */
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switch (cxt->lastc)
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{
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/* search again */
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case -1:
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if (cxt->search_string_index == 0)
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{
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if (last_isearch_string)
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{
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cxt->search_string_size = 64 + last_isearch_string_len;
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cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
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strcpy (cxt->search_string, last_isearch_string);
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cxt->search_string_index = last_isearch_string_len;
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rl_display_search (cxt->search_string, (cxt->sflags & SF_REVERSE), -1);
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break;
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}
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return (1);
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}
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else if (cxt->sflags & SF_REVERSE)
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cxt->sline_index--;
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else if (cxt->sline_index != cxt->sline_len)
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cxt->sline_index++;
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else
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rl_ding ();
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break;
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/* switch directions */
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case -2:
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cxt->direction = -cxt->direction;
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if (cxt->direction < 0)
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cxt->sflags |= SF_REVERSE;
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else
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cxt->sflags &= ~SF_REVERSE;
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break;
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/* delete character from search string. */
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case -3: /* C-H, DEL */
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/* This is tricky. To do this right, we need to keep a
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stack of search positions for the current search, with
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sentinels marking the beginning and end. But this will
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do until we have a real isearch-undo. */
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if (cxt->search_string_index == 0)
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rl_ding ();
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else
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cxt->search_string[--cxt->search_string_index] = '\0';
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break;
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case -4: /* C-G, abort */
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rl_replace_line (cxt->lines[cxt->save_line], 0);
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rl_point = cxt->save_point;
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rl_mark = cxt->save_mark;
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rl_restore_prompt();
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rl_clear_message ();
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return -1;
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case -5: /* C-W */
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/* skip over portion of line we already matched and yank word */
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wstart = rl_point + cxt->search_string_index;
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if (wstart >= rl_end)
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{
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rl_ding ();
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break;
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}
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/* if not in a word, move to one. */
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cval = _rl_char_value (rl_line_buffer, wstart);
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if (_rl_walphabetic (cval) == 0)
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{
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rl_ding ();
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break;
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}
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n = MB_NEXTCHAR (rl_line_buffer, wstart, 1, MB_FIND_NONZERO);;
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while (n < rl_end)
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{
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cval = _rl_char_value (rl_line_buffer, n);
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if (_rl_walphabetic (cval) == 0)
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break;
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n = MB_NEXTCHAR (rl_line_buffer, n, 1, MB_FIND_NONZERO);;
|
|
}
|
|
wlen = n - wstart + 1;
|
|
if (cxt->search_string_index + wlen + 1 >= cxt->search_string_size)
|
|
{
|
|
cxt->search_string_size += wlen + 1;
|
|
cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
|
|
}
|
|
for (; wstart < n; wstart++)
|
|
cxt->search_string[cxt->search_string_index++] = rl_line_buffer[wstart];
|
|
cxt->search_string[cxt->search_string_index] = '\0';
|
|
break;
|
|
|
|
case -6: /* C-Y */
|
|
/* skip over portion of line we already matched and yank rest */
|
|
wstart = rl_point + cxt->search_string_index;
|
|
if (wstart >= rl_end)
|
|
{
|
|
rl_ding ();
|
|
break;
|
|
}
|
|
n = rl_end - wstart + 1;
|
|
if (cxt->search_string_index + n + 1 >= cxt->search_string_size)
|
|
{
|
|
cxt->search_string_size += n + 1;
|
|
cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
|
|
}
|
|
for (n = wstart; n < rl_end; n++)
|
|
cxt->search_string[cxt->search_string_index++] = rl_line_buffer[n];
|
|
cxt->search_string[cxt->search_string_index] = '\0';
|
|
break;
|
|
|
|
/* Add character to search string and continue search. */
|
|
default:
|
|
if (cxt->search_string_index + 2 >= cxt->search_string_size)
|
|
{
|
|
cxt->search_string_size += 128;
|
|
cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
|
|
}
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
|
|
{
|
|
int j, l;
|
|
for (j = 0, l = strlen (cxt->mb); j < l; )
|
|
cxt->search_string[cxt->search_string_index++] = cxt->mb[j++];
|
|
}
|
|
else
|
|
#endif
|
|
cxt->search_string[cxt->search_string_index++] = c;
|
|
cxt->search_string[cxt->search_string_index] = '\0';
|
|
break;
|
|
}
|
|
|
|
for (cxt->sflags &= ~(SF_FOUND|SF_FAILED);; )
|
|
{
|
|
limit = cxt->sline_len - cxt->search_string_index + 1;
|
|
|
|
/* Search the current line. */
|
|
while ((cxt->sflags & SF_REVERSE) ? (cxt->sline_index >= 0) : (cxt->sline_index < limit))
|
|
{
|
|
if (STREQN (cxt->search_string, cxt->sline + cxt->sline_index, cxt->search_string_index))
|
|
{
|
|
cxt->sflags |= SF_FOUND;
|
|
break;
|
|
}
|
|
else
|
|
cxt->sline_index += cxt->direction;
|
|
}
|
|
if (cxt->sflags & SF_FOUND)
|
|
break;
|
|
|
|
/* Move to the next line, but skip new copies of the line
|
|
we just found and lines shorter than the string we're
|
|
searching for. */
|
|
do
|
|
{
|
|
/* Move to the next line. */
|
|
cxt->history_pos += cxt->direction;
|
|
|
|
/* At limit for direction? */
|
|
if ((cxt->sflags & SF_REVERSE) ? (cxt->history_pos < 0) : (cxt->history_pos == cxt->hlen))
|
|
{
|
|
cxt->sflags |= SF_FAILED;
|
|
break;
|
|
}
|
|
|
|
/* We will need these later. */
|
|
cxt->sline = cxt->lines[cxt->history_pos];
|
|
cxt->sline_len = strlen (cxt->sline);
|
|
}
|
|
while ((cxt->prev_line_found && STREQ (cxt->prev_line_found, cxt->lines[cxt->history_pos])) ||
|
|
(cxt->search_string_index > cxt->sline_len));
|
|
|
|
if (cxt->sflags & SF_FAILED)
|
|
break;
|
|
|
|
/* Now set up the line for searching... */
|
|
cxt->sline_index = (cxt->sflags & SF_REVERSE) ? cxt->sline_len - cxt->search_string_index : 0;
|
|
}
|
|
|
|
if (cxt->sflags & SF_FAILED)
|
|
{
|
|
/* We cannot find the search string. Ding the bell. */
|
|
rl_ding ();
|
|
cxt->history_pos = cxt->last_found_line;
|
|
return 1;
|
|
}
|
|
|
|
/* We have found the search string. Just display it. But don't
|
|
actually move there in the history list until the user accepts
|
|
the location. */
|
|
if (cxt->sflags & SF_FOUND)
|
|
{
|
|
cxt->prev_line_found = cxt->lines[cxt->history_pos];
|
|
rl_replace_line (cxt->lines[cxt->history_pos], 0);
|
|
rl_point = cxt->sline_index;
|
|
cxt->last_found_line = cxt->history_pos;
|
|
rl_display_search (cxt->search_string, (cxt->sflags & SF_REVERSE), (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
_rl_isearch_cleanup (cxt, r)
|
|
_rl_search_cxt *cxt;
|
|
int r;
|
|
{
|
|
if (r >= 0)
|
|
_rl_isearch_fini (cxt);
|
|
_rl_scxt_dispose (cxt, 0);
|
|
_rl_iscxt = 0;
|
|
|
|
RL_UNSETSTATE(RL_STATE_ISEARCH);
|
|
|
|
return (r != 0);
|
|
}
|
|
|
|
/* Search through the history looking for an interactively typed string.
|
|
This is analogous to i-search. We start the search in the current line.
|
|
DIRECTION is which direction to search; >= 0 means forward, < 0 means
|
|
backwards. */
|
|
static int
|
|
rl_search_history (direction, invoking_key)
|
|
int direction, invoking_key;
|
|
{
|
|
_rl_search_cxt *cxt; /* local for now, but saved globally */
|
|
int c, r;
|
|
|
|
RL_SETSTATE(RL_STATE_ISEARCH);
|
|
cxt = _rl_isearch_init (direction);
|
|
|
|
rl_display_search (cxt->search_string, (cxt->sflags & SF_REVERSE), -1);
|
|
|
|
/* If we are using the callback interface, all we do is set up here and
|
|
return. The key is that we leave RL_STATE_ISEARCH set. */
|
|
if (RL_ISSTATE (RL_STATE_CALLBACK))
|
|
return (0);
|
|
|
|
r = -1;
|
|
for (;;)
|
|
{
|
|
c = _rl_search_getchar (cxt);
|
|
/* We might want to handle EOF here (c == 0) */
|
|
r = _rl_isearch_dispatch (cxt, cxt->lastc);
|
|
if (r <= 0)
|
|
break;
|
|
}
|
|
|
|
/* The searching is over. The user may have found the string that she
|
|
was looking for, or else she may have exited a failing search. If
|
|
LINE_INDEX is -1, then that shows that the string searched for was
|
|
not found. We use this to determine where to place rl_point. */
|
|
return (_rl_isearch_cleanup (cxt, r));
|
|
}
|
|
|
|
#if defined (READLINE_CALLBACKS)
|
|
/* Called from the callback functions when we are ready to read a key. The
|
|
callback functions know to call this because RL_ISSTATE(RL_STATE_ISEARCH).
|
|
If _rl_isearch_dispatch finishes searching, this function is responsible
|
|
for turning off RL_STATE_ISEARCH, which it does using _rl_isearch_cleanup. */
|
|
int
|
|
_rl_isearch_callback (cxt)
|
|
_rl_search_cxt *cxt;
|
|
{
|
|
int c, r;
|
|
|
|
c = _rl_search_getchar (cxt);
|
|
/* We might want to handle EOF here */
|
|
r = _rl_isearch_dispatch (cxt, cxt->lastc);
|
|
|
|
return (r <= 0) ? _rl_isearch_cleanup (cxt, r) : 0;
|
|
}
|
|
#endif
|