1
/* parens.c -- implementation of matching parentheses feature. */
3
/* Copyright (C) 1987, 1989, 1992-2009 Free Software Foundation, Inc.
5
This file is part of the GNU Readline Library (Readline), a library
6
for reading lines of text with interactive input and history editing.
8
Readline is free software: you can redistribute it and/or modify
9
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation, either version 3 of the License, or
11
(at your option) any later version.
13
Readline is distributed in the hope that it will be useful,
14
but WITHOUT ANY WARRANTY; without even the implied warranty of
15
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
GNU General Public License for more details.
18
You should have received a copy of the GNU General Public License
19
along with Readline. If not, see <http://www.gnu.org/licenses/>.
22
#define READLINE_LIBRARY
24
#if defined (__TANDEM)
30
#if defined (HAVE_CONFIG_H)
35
#include <sys/types.h>
37
#if defined (HAVE_UNISTD_H)
41
#include "posixselect.h"
43
#if defined (HAVE_STRING_H)
45
#else /* !HAVE_STRING_H */
47
#endif /* !HAVE_STRING_H */
49
#if !defined (strchr) && !defined (__STDC__)
50
extern char *strchr (), *strrchr ();
51
#endif /* !strchr && !__STDC__ */
54
#include "rlprivate.h"
56
static int find_matching_open PARAMS((char *, int, int));
58
/* Non-zero means try to blink the matching open parenthesis when the
59
close parenthesis is inserted. */
60
#if defined (HAVE_SELECT)
61
int rl_blink_matching_paren = 1;
62
#else /* !HAVE_SELECT */
63
int rl_blink_matching_paren = 0;
64
#endif /* !HAVE_SELECT */
66
static int _paren_blink_usec = 500000;
68
/* Change emacs_standard_keymap to have bindings for paren matching when
69
ON_OR_OFF is 1, change them back to self_insert when ON_OR_OFF == 0. */
71
_rl_enable_paren_matching (on_or_off)
76
rl_bind_key_in_map (')', rl_insert_close, emacs_standard_keymap);
77
rl_bind_key_in_map (']', rl_insert_close, emacs_standard_keymap);
78
rl_bind_key_in_map ('}', rl_insert_close, emacs_standard_keymap);
82
rl_bind_key_in_map (')', rl_insert, emacs_standard_keymap);
83
rl_bind_key_in_map (']', rl_insert, emacs_standard_keymap);
84
rl_bind_key_in_map ('}', rl_insert, emacs_standard_keymap);
89
rl_set_paren_blink_timeout (u)
94
o = _paren_blink_usec;
96
_paren_blink_usec = u;
101
rl_insert_close (count, invoking_key)
102
int count, invoking_key;
104
if (rl_explicit_arg || !rl_blink_matching_paren)
105
_rl_insert_char (count, invoking_key);
108
#if defined (HAVE_SELECT)
109
int orig_point, match_point, ready;
110
struct timeval timer;
113
_rl_insert_char (1, invoking_key);
114
(*rl_redisplay_function) ();
116
find_matching_open (rl_line_buffer, rl_point - 2, invoking_key);
118
/* Emacs might message or ring the bell here, but I don't. */
123
FD_SET (fileno (rl_instream), &readfds);
124
USEC_TO_TIMEVAL (_paren_blink_usec, timer);
126
orig_point = rl_point;
127
rl_point = match_point;
128
(*rl_redisplay_function) ();
129
ready = select (1, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timer);
130
rl_point = orig_point;
131
#else /* !HAVE_SELECT */
132
_rl_insert_char (count, invoking_key);
133
#endif /* !HAVE_SELECT */
139
find_matching_open (string, from, closer)
144
int opener, level, delimiter;
148
case ']': opener = '['; break;
149
case '}': opener = '{'; break;
150
case ')': opener = '('; break;
155
level = 1; /* The closer passed in counts as 1. */
156
delimiter = 0; /* Delimited state unknown. */
158
for (i = from; i > -1; i--)
160
if (delimiter && (string[i] == delimiter))
162
else if (rl_basic_quote_characters && strchr (rl_basic_quote_characters, string[i]))
163
delimiter = string[i];
164
else if (!delimiter && (string[i] == closer))
166
else if (!delimiter && (string[i] == opener))