1 /* parens.c -- Implemenation of matching parenthesis feature. */
3 /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
5 This file is part of the GNU Readline Library, a library for
6 reading lines of text with interactive input and history editing.
8 The GNU Readline Library is free software; you can redistribute it
9 and/or modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 1, or
11 (at your option) any later version.
13 The GNU Readline Library is distributed in the hope that it will be
14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 The GNU General Public License is often shipped with GNU software, and
19 is generally kept in a file called COPYING or LICENSE. If you do not
20 have a copy of the license, write to the Free Software Foundation,
21 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include <sys/types.h>
28 /* Non-zero means try to blink the matching open parenthesis when the
29 close parenthesis is inserted. */
31 int rl_blink_matching_paren
= 1;
33 int rl_blink_matching_paren
= 0;
36 static int find_matching_open ();
38 rl_insert_close (count
, invoking_key
)
39 int count
, invoking_key
;
41 extern int rl_explicit_arg
;
43 if (rl_explicit_arg
|| !rl_blink_matching_paren
)
44 rl_insert (count
, invoking_key
);
48 int orig_point
, match_point
, ready
;
52 rl_insert (1, invoking_key
);
55 find_matching_open (rl_line_buffer
, rl_point
- 2, invoking_key
);
57 /* Emacs might message or ring the bell here, but I don't. */
62 FD_SET (fileno (rl_instream
), &readfds
);
66 orig_point
= rl_point
;
67 rl_point
= match_point
;
69 ready
= select (1, &readfds
, (fd_set
*)NULL
, (fd_set
*)NULL
, &timer
);
70 rl_point
= orig_point
;
72 rl_insert (count
, invoking_key
);
78 find_matching_open (string
, from
, closer
)
83 int opener
, level
, delimiter
;
87 case ']': opener
= '['; break;
88 case '}': opener
= '{'; break;
89 case ')': opener
= '('; break;
94 level
= 1; /* The closer passed in counts as 1. */
95 delimiter
= 0; /* Delimited state unknown. */
97 for (i
= from
; i
> -1; i
--)
99 if (delimiter
&& (string
[i
] == delimiter
))
101 else if ((string
[i
] == '\'') || (string
[i
] == '"'))
102 delimiter
= rl_line_buffer
[i
];
103 else if (!delimiter
&& (string
[i
] == closer
))
105 else if (!delimiter
&& (string
[i
] == opener
))
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