Move readline to the readline/readline subdirectory

[deliverable/binutils-gdb.git] / readline / readline / parens.c

diff --git a/readline/readline/parens.c b/readline/readline/parens.c
new file mode 100644 (file)
index 0000000..af47977
--- /dev/null
+++ b/readline/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);
+}