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author | Per Bothner <per@bothner.com> | 1994-01-16 03:39:57 +0000 |
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committer | Per Bothner <per@bothner.com> | 1994-01-16 03:39:57 +0000 |
commit | 5e98bbab1738932aeeb251684bba6aa550f5885a (patch) | |
tree | e51fd93e8d56b82ea1e55ab8cece5ecb2c0af014 /readline/parens.c | |
parent | 8b564df836ca7baffe636c1a16658cdcb6388080 (diff) | |
download | gdb-5e98bbab1738932aeeb251684bba6aa550f5885a.zip gdb-5e98bbab1738932aeeb251684bba6aa550f5885a.tar.gz gdb-5e98bbab1738932aeeb251684bba6aa550f5885a.tar.bz2 |
Merge in changes from bash-1.13. The most obvious one is
that the file readline.c has been split into multiple files.
* bind.c, complete.c, dispay.c, isearch.c, parens.c, rldefs.h,
rltty.c, search.c signals.c, tilde.c, tilde.h, xmalloc.c: New files.
Diffstat (limited to 'readline/parens.c')
-rw-r--r-- | readline/parens.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/readline/parens.c b/readline/parens.c new file mode 100644 index 0000000..2c96012 --- /dev/null +++ b/readline/parens.c @@ -0,0 +1,115 @@ +/* parens.c -- Implemenation of matching parenthesis feature. */ + +/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. + + This file is part of the GNU Readline Library, a library for + reading lines of text with interactive input and history editing. + + The GNU Readline Library 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 1, or + (at your option) any later version. + + The GNU Readline Library 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. + + The GNU General Public License is often shipped with GNU software, and + is generally kept in a file called COPYING or LICENSE. If you do not + have a copy of the license, write to the Free Software Foundation, + 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include <stdio.h> +#include <sys/types.h> +#include <sys/time.h> +#include "readline.h" + +/* Non-zero means try to blink the matching open parenthesis when the + close parenthesis is inserted. */ +#if defined (FD_SET) +int rl_blink_matching_paren = 1; +#else /* !FD_SET */ +int rl_blink_matching_paren = 0; +#endif /* !FD_SET */ + +static int find_matching_open (); + +rl_insert_close (count, invoking_key) + int count, invoking_key; +{ + extern int rl_explicit_arg; + + if (rl_explicit_arg || !rl_blink_matching_paren) + rl_insert (count, invoking_key); + else + { +#if defined (FD_SET) + int orig_point, match_point, ready; + struct timeval timer; + fd_set readfds; + + rl_insert (1, invoking_key); + rl_redisplay (); + 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; + + FD_ZERO (&readfds); + FD_SET (fileno (rl_instream), &readfds); + timer.tv_sec = 1; + timer.tv_usec = 500; + + orig_point = rl_point; + rl_point = match_point; + rl_redisplay (); + ready = select (1, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timer); + rl_point = orig_point; +#else /* !FD_SET */ + rl_insert (count, invoking_key); +#endif /* !FD_SET */ + } +} + +static int +find_matching_open (string, from, closer) + char *string; + int from, 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 ((string[i] == '\'') || (string[i] == '"')) + delimiter = rl_line_buffer[i]; + else if (!delimiter && (string[i] == closer)) + level++; + else if (!delimiter && (string[i] == opener)) + level--; + + if (!level) + break; + } + return (i); +} + + + |