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-rw-r--r--lib/readline/parens.c180
1 files changed, 180 insertions, 0 deletions
diff --git a/lib/readline/parens.c b/lib/readline/parens.c
new file mode 100644
index 0000000..af47977
--- /dev/null
+++ b/lib/readline/parens.c
@@ -0,0 +1,180 @@
+/* parens.c -- implementation of matching parentheses feature. */
+
+/* Copyright (C) 1987, 1989, 1992-2015, 2017 Free Software Foundation, Inc.
+
+ This file is part of the GNU Readline Library (Readline), a library
+ for reading lines of text with interactive input and history editing.
+
+ Readline is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Readline is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Readline. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define READLINE_LIBRARY
+
+#if defined (__TANDEM)
+# include <floss.h>
+#endif
+
+#include "rlconf.h"
+
+#if defined (HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <sys/types.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include "posixselect.h"
+
+#if defined (HAVE_STRING_H)
+# include <string.h>
+#else /* !HAVE_STRING_H */
+# include <strings.h>
+#endif /* !HAVE_STRING_H */
+
+#if !defined (strchr) && !defined (__STDC__)
+extern char *strchr (), *strrchr ();
+#endif /* !strchr && !__STDC__ */
+
+#include "readline.h"
+#include "rlprivate.h"
+
+static int find_matching_open PARAMS((char *, int, int));
+
+/* Non-zero means try to blink the matching open parenthesis when the
+ close parenthesis is inserted. */
+int rl_blink_matching_paren = 0;
+
+static int _paren_blink_usec = 500000;
+
+/* Change emacs_standard_keymap to have bindings for paren matching when
+ ON_OR_OFF is 1, change them back to self_insert when ON_OR_OFF == 0. */
+void
+_rl_enable_paren_matching (int on_or_off)
+{
+ if (on_or_off)
+ {
+ /* ([{ */
+ rl_bind_key_in_map (')', rl_insert_close, emacs_standard_keymap);
+ rl_bind_key_in_map (']', rl_insert_close, emacs_standard_keymap);
+ rl_bind_key_in_map ('}', rl_insert_close, emacs_standard_keymap);
+
+#if defined (VI_MODE)
+ /* ([{ */
+ rl_bind_key_in_map (')', rl_insert_close, vi_insertion_keymap);
+ rl_bind_key_in_map (']', rl_insert_close, vi_insertion_keymap);
+ rl_bind_key_in_map ('}', rl_insert_close, vi_insertion_keymap);
+#endif
+ }
+ else
+ {
+ /* ([{ */
+ rl_bind_key_in_map (')', rl_insert, emacs_standard_keymap);
+ rl_bind_key_in_map (']', rl_insert, emacs_standard_keymap);
+ rl_bind_key_in_map ('}', rl_insert, emacs_standard_keymap);
+
+#if defined (VI_MODE)
+ /* ([{ */
+ rl_bind_key_in_map (')', rl_insert, vi_insertion_keymap);
+ rl_bind_key_in_map (']', rl_insert, vi_insertion_keymap);
+ rl_bind_key_in_map ('}', rl_insert, vi_insertion_keymap);
+#endif
+ }
+}
+
+int
+rl_set_paren_blink_timeout (int u)
+{
+ int o;
+
+ o = _paren_blink_usec;
+ if (u > 0)
+ _paren_blink_usec = u;
+ return (o);
+}
+
+int
+rl_insert_close (int count, int invoking_key)
+{
+ if (rl_explicit_arg || !rl_blink_matching_paren)
+ _rl_insert_char (count, invoking_key);
+ else
+ {
+#if defined (HAVE_SELECT)
+ int orig_point, match_point, ready;
+ struct timeval timer;
+ fd_set readfds;
+
+ _rl_insert_char (1, invoking_key);
+ (*rl_redisplay_function) ();
+ match_point =
+ find_matching_open (rl_line_buffer, rl_point - 2, invoking_key);
+
+ /* Emacs might message or ring the bell here, but I don't. */
+ if (match_point < 0)
+ return 1;
+
+ FD_ZERO (&readfds);
+ FD_SET (fileno (rl_instream), &readfds);
+ USEC_TO_TIMEVAL (_paren_blink_usec, timer);
+
+ orig_point = rl_point;
+ rl_point = match_point;
+ (*rl_redisplay_function) ();
+ ready = select (1, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timer);
+ rl_point = orig_point;
+#else /* !HAVE_SELECT */
+ _rl_insert_char (count, invoking_key);
+#endif /* !HAVE_SELECT */
+ }
+ return 0;
+}
+
+static int
+find_matching_open (char *string, int from, int closer)
+{
+ register int i;
+ int opener, level, delimiter;
+
+ switch (closer)
+ {
+ case ']': opener = '['; break;
+ case '}': opener = '{'; break;
+ case ')': opener = '('; break;
+ default:
+ return (-1);
+ }
+
+ level = 1; /* The closer passed in counts as 1. */
+ delimiter = 0; /* Delimited state unknown. */
+
+ for (i = from; i > -1; i--)
+ {
+ if (delimiter && (string[i] == delimiter))
+ delimiter = 0;
+ else if (rl_basic_quote_characters && strchr (rl_basic_quote_characters, string[i]))
+ delimiter = string[i];
+ else if (!delimiter && (string[i] == closer))
+ level++;
+ else if (!delimiter && (string[i] == opener))
+ level--;
+
+ if (!level)
+ break;
+ }
+ return (i);
+}