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authorAndrew Cagney <cagney@redhat.com>2002-08-24 00:11:12 +0000
committerAndrew Cagney <cagney@redhat.com>2002-08-24 00:11:12 +0000
commit56f65f858db82c284f8a7ace20e2b2567e05df25 (patch)
tree70f1f0daf535afd5c32fde3d022be98d1facba36 /readline/misc.c
parent2ba146cd6fea7b7ba17f7dce0476c970e82c5398 (diff)
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dummy commit, get CVS off the branch.
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diff --git a/readline/misc.c b/readline/misc.c
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-/* misc.c -- miscellaneous bindable readline functions. */
-
-/* Copyright (C) 1987-2002 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 2, 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,
- 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#if defined (HAVE_LOCALE_H)
-# include <locale.h>
-#endif
-
-#include <stdio.h>
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-/* Some standard library routines. */
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-#include "rlshell.h"
-#include "xmalloc.h"
-
-static int rl_digit_loop PARAMS((void));
-static void _rl_history_set_point PARAMS((void));
-
-/* Forward declarations used in this file */
-void _rl_free_history_entry PARAMS((HIST_ENTRY *));
-
-/* If non-zero, rl_get_previous_history and rl_get_next_history attempt
- to preserve the value of rl_point from line to line. */
-int _rl_history_preserve_point = 0;
-
-/* Saved target point for when _rl_history_preserve_point is set. Special
- value of -1 means that point is at the end of the line. */
-int _rl_history_saved_point = -1;
-
-/* **************************************************************** */
-/* */
-/* Numeric Arguments */
-/* */
-/* **************************************************************** */
-
-/* Handle C-u style numeric args, as well as M--, and M-digits. */
-static int
-rl_digit_loop ()
-{
- int key, c, sawminus, sawdigits;
-
- rl_save_prompt ();
-
- RL_SETSTATE(RL_STATE_NUMERICARG);
- sawminus = sawdigits = 0;
- while (1)
- {
- if (rl_numeric_arg > 1000000)
- {
- sawdigits = rl_explicit_arg = rl_numeric_arg = 0;
- rl_ding ();
- rl_restore_prompt ();
- rl_clear_message ();
- RL_UNSETSTATE(RL_STATE_NUMERICARG);
- return 1;
- }
- rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg);
- RL_SETSTATE(RL_STATE_MOREINPUT);
- key = c = rl_read_key ();
- RL_UNSETSTATE(RL_STATE_MOREINPUT);
-
- if (c < 0)
- {
- _rl_abort_internal ();
- return -1;
- }
-
- /* If we see a key bound to `universal-argument' after seeing digits,
- it ends the argument but is otherwise ignored. */
- if (_rl_keymap[c].type == ISFUNC &&
- _rl_keymap[c].function == rl_universal_argument)
- {
- if (sawdigits == 0)
- {
- rl_numeric_arg *= 4;
- continue;
- }
- else
- {
- RL_SETSTATE(RL_STATE_MOREINPUT);
- key = rl_read_key ();
- RL_UNSETSTATE(RL_STATE_MOREINPUT);
- rl_restore_prompt ();
- rl_clear_message ();
- RL_UNSETSTATE(RL_STATE_NUMERICARG);
- return (_rl_dispatch (key, _rl_keymap));
- }
- }
-
- c = UNMETA (c);
-
- if (_rl_digit_p (c))
- {
- rl_numeric_arg = rl_explicit_arg ? (rl_numeric_arg * 10) + c - '0' : c - '0';
- sawdigits = rl_explicit_arg = 1;
- }
- else if (c == '-' && rl_explicit_arg == 0)
- {
- rl_numeric_arg = sawminus = 1;
- rl_arg_sign = -1;
- }
- else
- {
- /* Make M-- command equivalent to M--1 command. */
- if (sawminus && rl_numeric_arg == 1 && rl_explicit_arg == 0)
- rl_explicit_arg = 1;
- rl_restore_prompt ();
- rl_clear_message ();
- RL_UNSETSTATE(RL_STATE_NUMERICARG);
- return (_rl_dispatch (key, _rl_keymap));
- }
- }
-
- /*NOTREACHED*/
-}
-
-/* Add the current digit to the argument in progress. */
-int
-rl_digit_argument (ignore, key)
- int ignore, key;
-{
- rl_execute_next (key);
- return (rl_digit_loop ());
-}
-
-/* What to do when you abort reading an argument. */
-int
-rl_discard_argument ()
-{
- rl_ding ();
- rl_clear_message ();
- _rl_init_argument ();
- return 0;
-}
-
-/* Create a default argument. */
-int
-_rl_init_argument ()
-{
- rl_numeric_arg = rl_arg_sign = 1;
- rl_explicit_arg = 0;
- return 0;
-}
-
-/* C-u, universal argument. Multiply the current argument by 4.
- Read a key. If the key has nothing to do with arguments, then
- dispatch on it. If the key is the abort character then abort. */
-int
-rl_universal_argument (count, key)
- int count, key;
-{
- rl_numeric_arg *= 4;
- return (rl_digit_loop ());
-}
-
-/* **************************************************************** */
-/* */
-/* History Utilities */
-/* */
-/* **************************************************************** */
-
-/* We already have a history library, and that is what we use to control
- the history features of readline. This is our local interface to
- the history mechanism. */
-
-/* While we are editing the history, this is the saved
- version of the original line. */
-HIST_ENTRY *_rl_saved_line_for_history = (HIST_ENTRY *)NULL;
-
-/* Set the history pointer back to the last entry in the history. */
-void
-_rl_start_using_history ()
-{
- using_history ();
- if (_rl_saved_line_for_history)
- _rl_free_history_entry (_rl_saved_line_for_history);
-
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
-}
-
-/* Free the contents (and containing structure) of a HIST_ENTRY. */
-void
-_rl_free_history_entry (entry)
- HIST_ENTRY *entry;
-{
- if (entry == 0)
- return;
- if (entry->line)
- free (entry->line);
- free (entry);
-}
-
-/* Perhaps put back the current line if it has changed. */
-int
-rl_maybe_replace_line ()
-{
- HIST_ENTRY *temp;
-
- temp = current_history ();
- /* If the current line has changed, save the changes. */
- if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list))
- {
- temp = replace_history_entry (where_history (), rl_line_buffer, (histdata_t)rl_undo_list);
- free (temp->line);
- free (temp);
- }
- return 0;
-}
-
-/* Restore the _rl_saved_line_for_history if there is one. */
-int
-rl_maybe_unsave_line ()
-{
- if (_rl_saved_line_for_history)
- {
- rl_replace_line (_rl_saved_line_for_history->line, 0);
- rl_undo_list = (UNDO_LIST *)_rl_saved_line_for_history->data;
- _rl_free_history_entry (_rl_saved_line_for_history);
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
- rl_point = rl_end; /* rl_replace_line sets rl_end */
- }
- else
- rl_ding ();
- return 0;
-}
-
-/* Save the current line in _rl_saved_line_for_history. */
-int
-rl_maybe_save_line ()
-{
- if (_rl_saved_line_for_history == 0)
- {
- _rl_saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
- _rl_saved_line_for_history->line = savestring (rl_line_buffer);
- _rl_saved_line_for_history->data = (char *)rl_undo_list;
- }
- return 0;
-}
-
-int
-_rl_free_saved_history_line ()
-{
- if (_rl_saved_line_for_history)
- {
- _rl_free_history_entry (_rl_saved_line_for_history);
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
- }
- return 0;
-}
-
-static void
-_rl_history_set_point ()
-{
- rl_point = (_rl_history_preserve_point && _rl_history_saved_point != -1)
- ? _rl_history_saved_point
- : rl_end;
- if (rl_point > rl_end)
- rl_point = rl_end;
-
-#if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- rl_point = 0;
-#endif /* VI_MODE */
-
- if (rl_editing_mode == emacs_mode)
- rl_mark = (rl_point == rl_end ? 0 : rl_end);
-}
-
-void
-rl_replace_from_history (entry, flags)
- HIST_ENTRY *entry;
- int flags; /* currently unused */
-{
- rl_replace_line (entry->line, 0);
- rl_undo_list = (UNDO_LIST *)entry->data;
- rl_point = rl_end;
- rl_mark = 0;
-
-#if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- {
- rl_point = 0;
- rl_mark = rl_end;
- }
-#endif
-}
-
-/* **************************************************************** */
-/* */
-/* History Commands */
-/* */
-/* **************************************************************** */
-
-/* Meta-< goes to the start of the history. */
-int
-rl_beginning_of_history (count, key)
- int count, key;
-{
- return (rl_get_previous_history (1 + where_history (), key));
-}
-
-/* Meta-> goes to the end of the history. (The current line). */
-int
-rl_end_of_history (count, key)
- int count, key;
-{
- rl_maybe_replace_line ();
- using_history ();
- rl_maybe_unsave_line ();
- return 0;
-}
-
-/* Move down to the next history line. */
-int
-rl_get_next_history (count, key)
- int count, key;
-{
- HIST_ENTRY *temp;
-
- if (count < 0)
- return (rl_get_previous_history (-count, key));
-
- if (count == 0)
- return 0;
-
- rl_maybe_replace_line ();
-
- /* either not saved by rl_newline or at end of line, so set appropriately. */
- if (_rl_history_saved_point == -1 && (rl_point || rl_end))
- _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point;
-
- temp = (HIST_ENTRY *)NULL;
- while (count)
- {
- temp = next_history ();
- if (!temp)
- break;
- --count;
- }
-
- if (temp == 0)
- rl_maybe_unsave_line ();
- else
- {
- rl_replace_from_history (temp, 0);
- _rl_history_set_point ();
- }
- return 0;
-}
-
-/* Get the previous item out of our interactive history, making it the current
- line. If there is no previous history, just ding. */
-int
-rl_get_previous_history (count, key)
- int count, key;
-{
- HIST_ENTRY *old_temp, *temp;
-
- if (count < 0)
- return (rl_get_next_history (-count, key));
-
- if (count == 0)
- return 0;
-
- /* either not saved by rl_newline or at end of line, so set appropriately. */
- if (_rl_history_saved_point == -1 && (rl_point || rl_end))
- _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point;
-
- /* If we don't have a line saved, then save this one. */
- rl_maybe_save_line ();
-
- /* If the current line has changed, save the changes. */
- rl_maybe_replace_line ();
-
- temp = old_temp = (HIST_ENTRY *)NULL;
- while (count)
- {
- temp = previous_history ();
- if (temp == 0)
- break;
-
- old_temp = temp;
- --count;
- }
-
- /* If there was a large argument, and we moved back to the start of the
- history, that is not an error. So use the last value found. */
- if (!temp && old_temp)
- temp = old_temp;
-
- if (temp == 0)
- rl_ding ();
- else
- {
- rl_replace_from_history (temp, 0);
- _rl_history_set_point ();
- }
- return 0;
-}
-
-/* **************************************************************** */
-/* */
-/* Editing Modes */
-/* */
-/* **************************************************************** */
-/* How to toggle back and forth between editing modes. */
-int
-rl_vi_editing_mode (count, key)
- int count, key;
-{
-#if defined (VI_MODE)
- _rl_set_insert_mode (RL_IM_INSERT, 1); /* vi mode ignores insert mode */
- rl_editing_mode = vi_mode;
- rl_vi_insertion_mode (1, key);
-#endif /* VI_MODE */
-
- return 0;
-}
-
-int
-rl_emacs_editing_mode (count, key)
- int count, key;
-{
- rl_editing_mode = emacs_mode;
- _rl_set_insert_mode (RL_IM_INSERT, 1); /* emacs mode default is insert mode */
- _rl_keymap = emacs_standard_keymap;
- return 0;
-}
-
-/* Function for the rest of the library to use to set insert/overwrite mode. */
-void
-_rl_set_insert_mode (im, force)
- int im, force;
-{
-#ifdef CURSOR_MODE
- _rl_set_cursor (im, force);
-#endif
-
- rl_insert_mode = im;
-}
-
-/* Toggle overwrite mode. A positive explicit argument selects overwrite
- mode. A negative or zero explicit argument selects insert mode. */
-int
-rl_overwrite_mode (count, key)
- int count, key;
-{
- if (rl_explicit_arg == 0)
- _rl_set_insert_mode (rl_insert_mode ^ 1, 0);
- else if (count > 0)
- _rl_set_insert_mode (RL_IM_OVERWRITE, 0);
- else
- _rl_set_insert_mode (RL_IM_INSERT, 0);
-
- return 0;
-}