--- /dev/null
+/* readline.c -- a general facility for reading lines of input
+ with emacs style editing and completion. */
+
+/* Copyright (C) 1987-2013 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 (HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#include <sys/types.h>
+#include "posixstat.h"
+#include <fcntl.h>
+#if defined (HAVE_SYS_FILE_H)
+# include <sys/file.h>
+#endif /* HAVE_SYS_FILE_H */
+
+#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>
+#include "posixjmp.h"
+#include <errno.h>
+
+#if !defined (errno)
+extern int errno;
+#endif /* !errno */
+
+/* System-specific feature definitions and include files. */
+#include "rldefs.h"
+#include "rlmbutil.h"
+
+#if defined (__EMX__)
+# define INCL_DOSPROCESS
+# include <os2.h>
+#endif /* __EMX__ */
+
+/* Some standard library routines. */
+#include "readline.h"
+#include "history.h"
+
+#include "rlprivate.h"
+#include "rlshell.h"
+#include "xmalloc.h"
+
+#ifndef RL_LIBRARY_VERSION
+# define RL_LIBRARY_VERSION "5.1"
+#endif
+
+#ifndef RL_READLINE_VERSION
+# define RL_READLINE_VERSION 0x0501
+#endif
+
+extern void _rl_free_history_entry PARAMS((HIST_ENTRY *));
+
+#if defined (COLOR_SUPPORT)
+extern void _rl_parse_colors PARAMS((void)); /* XXX */
+#endif
+
+
+/* Forward declarations used in this file. */
+static char *readline_internal PARAMS((void));
+static void readline_initialize_everything PARAMS((void));
+
+static void bind_arrow_keys_internal PARAMS((Keymap));
+static void bind_arrow_keys PARAMS((void));
+
+static void readline_default_bindings PARAMS((void));
+static void reset_default_bindings PARAMS((void));
+
+static int _rl_subseq_result PARAMS((int, Keymap, int, int));
+static int _rl_subseq_getchar PARAMS((int));
+
+/* **************************************************************** */
+/* */
+/* Line editing input utility */
+/* */
+/* **************************************************************** */
+
+const char *rl_library_version = RL_LIBRARY_VERSION;
+
+int rl_readline_version = RL_READLINE_VERSION;
+
+/* True if this is `real' readline as opposed to some stub substitute. */
+int rl_gnu_readline_p = 1;
+
+/* A pointer to the keymap that is currently in use.
+ By default, it is the standard emacs keymap. */
+Keymap _rl_keymap = emacs_standard_keymap;
+
+/* The current style of editing. */
+int rl_editing_mode = emacs_mode;
+
+/* The current insert mode: input (the default) or overwrite */
+int rl_insert_mode = RL_IM_DEFAULT;
+
+/* Non-zero if we called this function from _rl_dispatch(). It's present
+ so functions can find out whether they were called from a key binding
+ or directly from an application. */
+int rl_dispatching;
+
+/* Non-zero if the previous command was a kill command. */
+int _rl_last_command_was_kill = 0;
+
+/* The current value of the numeric argument specified by the user. */
+int rl_numeric_arg = 1;
+
+/* Non-zero if an argument was typed. */
+int rl_explicit_arg = 0;
+
+/* Temporary value used while generating the argument. */
+int rl_arg_sign = 1;
+
+/* Non-zero means we have been called at least once before. */
+static int rl_initialized;
+
+#if 0
+/* If non-zero, this program is running in an EMACS buffer. */
+static int running_in_emacs;
+#endif
+
+/* Flags word encapsulating the current readline state. */
+int rl_readline_state = RL_STATE_NONE;
+
+/* The current offset in the current input line. */
+int rl_point;
+
+/* Mark in the current input line. */
+int rl_mark;
+
+/* Length of the current input line. */
+int rl_end;
+
+/* Make this non-zero to return the current input_line. */
+int rl_done;
+
+/* The last function executed by readline. */
+rl_command_func_t *rl_last_func = (rl_command_func_t *)NULL;
+
+/* Top level environment for readline_internal (). */
+procenv_t _rl_top_level;
+
+/* The streams we interact with. */
+FILE *_rl_in_stream, *_rl_out_stream;
+
+/* The names of the streams that we do input and output to. */
+FILE *rl_instream = (FILE *)NULL;
+FILE *rl_outstream = (FILE *)NULL;
+
+/* Non-zero means echo characters as they are read. Defaults to no echo;
+ set to 1 if there is a controlling terminal, we can get its attributes,
+ and the attributes include `echo'. Look at rltty.c:prepare_terminal_settings
+ for the code that sets it. */
+int _rl_echoing_p = 0;
+
+/* Current prompt. */
+char *rl_prompt = (char *)NULL;
+int rl_visible_prompt_length = 0;
+
+/* Set to non-zero by calling application if it has already printed rl_prompt
+ and does not want readline to do it the first time. */
+int rl_already_prompted = 0;
+
+/* The number of characters read in order to type this complete command. */
+int rl_key_sequence_length = 0;
+
+/* If non-zero, then this is the address of a function to call just
+ before readline_internal_setup () prints the first prompt. */
+rl_hook_func_t *rl_startup_hook = (rl_hook_func_t *)NULL;
+
+/* If non-zero, this is the address of a function to call just before
+ readline_internal_setup () returns and readline_internal starts
+ reading input characters. */
+rl_hook_func_t *rl_pre_input_hook = (rl_hook_func_t *)NULL;
+
+/* What we use internally. You should always refer to RL_LINE_BUFFER. */
+static char *the_line;
+
+/* The character that can generate an EOF. Really read from
+ the terminal driver... just defaulted here. */
+int _rl_eof_char = CTRL ('D');
+
+/* Non-zero makes this the next keystroke to read. */
+int rl_pending_input = 0;
+
+/* Pointer to a useful terminal name. */
+const char *rl_terminal_name = (const char *)NULL;
+
+/* Non-zero means to always use horizontal scrolling in line display. */
+int _rl_horizontal_scroll_mode = 0;
+
+/* Non-zero means to display an asterisk at the starts of history lines
+ which have been modified. */
+int _rl_mark_modified_lines = 0;
+
+/* The style of `bell' notification preferred. This can be set to NO_BELL,
+ AUDIBLE_BELL, or VISIBLE_BELL. */
+int _rl_bell_preference = AUDIBLE_BELL;
+
+/* String inserted into the line by rl_insert_comment (). */
+char *_rl_comment_begin;
+
+/* Keymap holding the function currently being executed. */
+Keymap rl_executing_keymap;
+
+/* Keymap we're currently using to dispatch. */
+Keymap _rl_dispatching_keymap;
+
+/* Non-zero means to erase entire line, including prompt, on empty input lines. */
+int rl_erase_empty_line = 0;
+
+/* Non-zero means to read only this many characters rather than up to a
+ character bound to accept-line. */
+int rl_num_chars_to_read;
+
+/* Line buffer and maintenance. */
+char *rl_line_buffer = (char *)NULL;
+int rl_line_buffer_len = 0;
+
+/* Key sequence `contexts' */
+_rl_keyseq_cxt *_rl_kscxt = 0;
+
+int rl_executing_key;
+char *rl_executing_keyseq = 0;
+int _rl_executing_keyseq_size = 0;
+
+/* Timeout (specified in milliseconds) when reading characters making up an
+ ambiguous multiple-key sequence */
+int _rl_keyseq_timeout = 500;
+
+#define RESIZE_KEYSEQ_BUFFER() \
+ do \
+ { \
+ if (rl_key_sequence_length + 2 >= _rl_executing_keyseq_size) \
+ { \
+ _rl_executing_keyseq_size += 16; \
+ rl_executing_keyseq = xrealloc (rl_executing_keyseq, _rl_executing_keyseq_size); \
+ } \
+ } \
+ while (0);
+
+/* Forward declarations used by the display, termcap, and history code. */
+
+/* **************************************************************** */
+/* */
+/* `Forward' declarations */
+/* */
+/* **************************************************************** */
+
+/* Non-zero means do not parse any lines other than comments and
+ parser directives. */
+unsigned char _rl_parsing_conditionalized_out = 0;
+
+/* Non-zero means to convert characters with the meta bit set to
+ escape-prefixed characters so we can indirect through
+ emacs_meta_keymap or vi_escape_keymap. */
+int _rl_convert_meta_chars_to_ascii = 1;
+
+/* Non-zero means to output characters with the meta bit set directly
+ rather than as a meta-prefixed escape sequence. */
+int _rl_output_meta_chars = 0;
+
+/* Non-zero means to look at the termios special characters and bind
+ them to equivalent readline functions at startup. */
+int _rl_bind_stty_chars = 1;
+
+/* Non-zero means to go through the history list at every newline (or
+ whenever rl_done is set and readline returns) and revert each line to
+ its initial state. */
+int _rl_revert_all_at_newline = 0;
+
+/* Non-zero means to honor the termios ECHOCTL bit and echo control
+ characters corresponding to keyboard-generated signals. */
+int _rl_echo_control_chars = 1;
+
+/* Non-zero means to prefix the displayed prompt with a character indicating
+ the editing mode: @ for emacs, : for vi-command, + for vi-insert. */
+int _rl_show_mode_in_prompt = 0;
+
+/* **************************************************************** */
+/* */
+/* Top Level Functions */
+/* */
+/* **************************************************************** */
+
+/* Non-zero means treat 0200 bit in terminal input as Meta bit. */
+int _rl_meta_flag = 0; /* Forward declaration */
+
+/* Set up the prompt and expand it. Called from readline() and
+ rl_callback_handler_install (). */
+int
+rl_set_prompt (prompt)
+ const char *prompt;
+{
+ FREE (rl_prompt);
+ rl_prompt = prompt ? savestring (prompt) : (char *)NULL;
+ rl_display_prompt = rl_prompt ? rl_prompt : "";
+
+ rl_visible_prompt_length = rl_expand_prompt (rl_prompt);
+ return 0;
+}
+
+/* Read a line of input. Prompt with PROMPT. An empty PROMPT means
+ none. A return value of NULL means that EOF was encountered. */
+char *
+readline (prompt)
+ const char *prompt;
+{
+ char *value;
+#if 0
+ int in_callback;
+#endif
+
+ /* If we are at EOF return a NULL string. */
+ if (rl_pending_input == EOF)
+ {
+ rl_clear_pending_input ();
+ return ((char *)NULL);
+ }
+
+#if 0
+ /* If readline() is called after installing a callback handler, temporarily
+ turn off the callback state to avoid ensuing messiness. Patch supplied
+ by the gdb folks. XXX -- disabled. This can be fooled and readline
+ left in a strange state by a poorly-timed longjmp. */
+ if (in_callback = RL_ISSTATE (RL_STATE_CALLBACK))
+ RL_UNSETSTATE (RL_STATE_CALLBACK);
+#endif
+
+ rl_set_prompt (prompt);
+
+ rl_initialize ();
+ if (rl_prep_term_function)
+ (*rl_prep_term_function) (_rl_meta_flag);
+
+#if defined (HANDLE_SIGNALS)
+ rl_set_signals ();
+#endif
+
+ value = readline_internal ();
+ if (rl_deprep_term_function)
+ (*rl_deprep_term_function) ();
+
+#if defined (HANDLE_SIGNALS)
+ rl_clear_signals ();
+#endif
+
+#if 0
+ if (in_callback)
+ RL_SETSTATE (RL_STATE_CALLBACK);
+#endif
+
+#if HAVE_DECL_AUDIT_TTY && defined (ENABLE_TTY_AUDIT_SUPPORT)
+ if (value)
+ _rl_audit_tty (value);
+#endif
+
+ return (value);
+}
+
+#if defined (READLINE_CALLBACKS)
+# define STATIC_CALLBACK
+#else
+# define STATIC_CALLBACK static
+#endif
+
+STATIC_CALLBACK void
+readline_internal_setup ()
+{
+ char *nprompt;
+
+ _rl_in_stream = rl_instream;
+ _rl_out_stream = rl_outstream;
+
+ /* Enable the meta key only for the duration of readline(), if this
+ terminal has one and the terminal has been initialized */
+ if (_rl_enable_meta & RL_ISSTATE (RL_STATE_TERMPREPPED))
+ _rl_enable_meta_key ();
+
+ if (rl_startup_hook)
+ (*rl_startup_hook) ();
+
+#if defined (VI_MODE)
+ if (rl_editing_mode == vi_mode)
+ rl_vi_insertion_mode (1, 'i'); /* don't want to reset last */
+#endif /* VI_MODE */
+
+ /* If we're not echoing, we still want to at least print a prompt, because
+ rl_redisplay will not do it for us. If the calling application has a
+ custom redisplay function, though, let that function handle it. */
+ if (_rl_echoing_p == 0 && rl_redisplay_function == rl_redisplay)
+ {
+ if (rl_prompt && rl_already_prompted == 0)
+ {
+ nprompt = _rl_strip_prompt (rl_prompt);
+ fprintf (_rl_out_stream, "%s", nprompt);
+ fflush (_rl_out_stream);
+ xfree (nprompt);
+ }
+ }
+ else
+ {
+ if (rl_prompt && rl_already_prompted)
+ rl_on_new_line_with_prompt ();
+ else
+ rl_on_new_line ();
+ (*rl_redisplay_function) ();
+ }
+
+ if (rl_pre_input_hook)
+ (*rl_pre_input_hook) ();
+
+ RL_CHECK_SIGNALS ();
+}
+
+STATIC_CALLBACK char *
+readline_internal_teardown (eof)
+ int eof;
+{
+ char *temp;
+ HIST_ENTRY *entry;
+
+ RL_CHECK_SIGNALS ();
+
+ /* Restore the original of this history line, iff the line that we
+ are editing was originally in the history, AND the line has changed. */
+ entry = current_history ();
+
+ if (entry && rl_undo_list)
+ {
+ temp = savestring (the_line);
+ rl_revert_line (1, 0);
+ entry = replace_history_entry (where_history (), the_line, (histdata_t)NULL);
+ _rl_free_history_entry (entry);
+
+ strcpy (the_line, temp);
+ xfree (temp);
+ }
+
+ if (_rl_revert_all_at_newline)
+ _rl_revert_all_lines ();
+
+ /* At any rate, it is highly likely that this line has an undo list. Get
+ rid of it now. */
+ if (rl_undo_list)
+ rl_free_undo_list ();
+
+ /* Disable the meta key, if this terminal has one and we were told to use it.
+ The check whether or not we sent the enable string is in
+ _rl_disable_meta_key(); the flag is set in _rl_enable_meta_key */
+ _rl_disable_meta_key ();
+
+ /* Restore normal cursor, if available. */
+ _rl_set_insert_mode (RL_IM_INSERT, 0);
+
+ return (eof ? (char *)NULL : savestring (the_line));
+}
+
+void
+_rl_internal_char_cleanup ()
+{
+#if defined (VI_MODE)
+ /* In vi mode, when you exit insert mode, the cursor moves back
+ over the previous character. We explicitly check for that here. */
+ if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap)
+ rl_vi_check ();
+#endif /* VI_MODE */
+
+ if (rl_num_chars_to_read && rl_end >= rl_num_chars_to_read)
+ {
+ (*rl_redisplay_function) ();
+ _rl_want_redisplay = 0;
+ rl_newline (1, '\n');
+ }
+
+ if (rl_done == 0)
+ {
+ (*rl_redisplay_function) ();
+ _rl_want_redisplay = 0;
+ }
+
+ /* If the application writer has told us to erase the entire line if
+ the only character typed was something bound to rl_newline, do so. */
+ if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline &&
+ rl_point == 0 && rl_end == 0)
+ _rl_erase_entire_line ();
+}
+
+STATIC_CALLBACK int
+#if defined (READLINE_CALLBACKS)
+readline_internal_char ()
+#else
+readline_internal_charloop ()
+#endif
+{
+ static int lastc, eof_found;
+ int c, code, lk;
+
+ lastc = -1;
+ eof_found = 0;
+
+#if !defined (READLINE_CALLBACKS)
+ while (rl_done == 0)
+ {
+#endif
+ lk = _rl_last_command_was_kill;
+
+#if defined (HAVE_POSIX_SIGSETJMP)
+ code = sigsetjmp (_rl_top_level, 0);
+#else
+ code = setjmp (_rl_top_level);
+#endif
+
+ if (code)
+ {
+ (*rl_redisplay_function) ();
+ _rl_want_redisplay = 0;
+ /* If we get here, we're not being called from something dispatched
+ from _rl_callback_read_char(), which sets up its own value of
+ _rl_top_level (saving and restoring the old, of course), so
+ we can just return here. */
+ if (RL_ISSTATE (RL_STATE_CALLBACK))
+ return (0);
+ }
+
+ if (rl_pending_input == 0)
+ {
+ /* Then initialize the argument and number of keys read. */
+ _rl_reset_argument ();
+ rl_key_sequence_length = 0;
+ rl_executing_keyseq[0] = 0;
+ }
+
+ RL_SETSTATE(RL_STATE_READCMD);
+ c = rl_read_key ();
+ RL_UNSETSTATE(RL_STATE_READCMD);
+
+ /* look at input.c:rl_getc() for the circumstances under which this will
+ be returned; punt immediately on read error without converting it to
+ a newline; assume that rl_read_key has already called the signal
+ handler. */
+ if (c == READERR)
+ {
+#if defined (READLINE_CALLBACKS)
+ RL_SETSTATE(RL_STATE_DONE);
+ return (rl_done = 1);
+#else
+ eof_found = 1;
+ break;
+#endif
+ }
+
+ /* EOF typed to a non-blank line is a <NL>. If we want to change this,
+ to force any existing line to be ignored when read(2) reads EOF,
+ for example, this is the place to change. */
+ if (c == EOF && rl_end)
+ c = NEWLINE;
+
+ /* The character _rl_eof_char typed to blank line, and not as the
+ previous character is interpreted as EOF. */
+ if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end)
+ {
+#if defined (READLINE_CALLBACKS)
+ RL_SETSTATE(RL_STATE_DONE);
+ return (rl_done = 1);
+#else
+ eof_found = 1;
+ break;
+#endif
+ }
+
+ lastc = c;
+ _rl_dispatch ((unsigned char)c, _rl_keymap);
+ RL_CHECK_SIGNALS ();
+
+ /* If there was no change in _rl_last_command_was_kill, then no kill
+ has taken place. Note that if input is pending we are reading
+ a prefix command, so nothing has changed yet. */
+ if (rl_pending_input == 0 && lk == _rl_last_command_was_kill)
+ _rl_last_command_was_kill = 0;
+
+ _rl_internal_char_cleanup ();
+
+#if defined (READLINE_CALLBACKS)
+ return 0;
+#else
+ }
+
+ return (eof_found);
+#endif
+}
+
+#if defined (READLINE_CALLBACKS)
+static int
+readline_internal_charloop ()
+{
+ int eof = 1;
+
+ while (rl_done == 0)
+ eof = readline_internal_char ();
+ return (eof);
+}
+#endif /* READLINE_CALLBACKS */
+
+/* Read a line of input from the global rl_instream, doing output on
+ the global rl_outstream.
+ If rl_prompt is non-null, then that is our prompt. */
+static char *
+readline_internal ()
+{
+ int eof;
+
+ readline_internal_setup ();
+ eof = readline_internal_charloop ();
+ return (readline_internal_teardown (eof));
+}
+
+void
+_rl_init_line_state ()
+{
+ rl_point = rl_end = rl_mark = 0;
+ the_line = rl_line_buffer;
+ the_line[0] = 0;
+}
+
+void
+_rl_set_the_line ()
+{
+ the_line = rl_line_buffer;
+}
+
+#if defined (READLINE_CALLBACKS)
+_rl_keyseq_cxt *
+_rl_keyseq_cxt_alloc ()
+{
+ _rl_keyseq_cxt *cxt;
+
+ cxt = (_rl_keyseq_cxt *)xmalloc (sizeof (_rl_keyseq_cxt));
+
+ cxt->flags = cxt->subseq_arg = cxt->subseq_retval = 0;
+
+ cxt->okey = 0;
+ cxt->ocxt = _rl_kscxt;
+ cxt->childval = 42; /* sentinel value */
+
+ return cxt;
+}
+
+void
+_rl_keyseq_cxt_dispose (cxt)
+ _rl_keyseq_cxt *cxt;
+{
+ xfree (cxt);
+}
+
+void
+_rl_keyseq_chain_dispose ()
+{
+ _rl_keyseq_cxt *cxt;
+
+ while (_rl_kscxt)
+ {
+ cxt = _rl_kscxt;
+ _rl_kscxt = _rl_kscxt->ocxt;
+ _rl_keyseq_cxt_dispose (cxt);
+ }
+}
+#endif
+
+static int
+_rl_subseq_getchar (key)
+ int key;
+{
+ int k;
+
+ if (key == ESC)
+ RL_SETSTATE(RL_STATE_METANEXT);
+ RL_SETSTATE(RL_STATE_MOREINPUT);
+ k = rl_read_key ();
+ RL_UNSETSTATE(RL_STATE_MOREINPUT);
+ if (key == ESC)
+ RL_UNSETSTATE(RL_STATE_METANEXT);
+
+ return k;
+}
+
+#if defined (READLINE_CALLBACKS)
+int
+_rl_dispatch_callback (cxt)
+ _rl_keyseq_cxt *cxt;
+{
+ int nkey, r;
+
+ /* For now */
+ /* The first time this context is used, we want to read input and dispatch
+ on it. When traversing the chain of contexts back `up', we want to use
+ the value from the next context down. We're simulating recursion using
+ a chain of contexts. */
+ if ((cxt->flags & KSEQ_DISPATCHED) == 0)
+ {
+ nkey = _rl_subseq_getchar (cxt->okey);
+ if (nkey < 0)
+ {
+ _rl_abort_internal ();
+ return -1;
+ }
+ r = _rl_dispatch_subseq (nkey, cxt->dmap, cxt->subseq_arg);
+ cxt->flags |= KSEQ_DISPATCHED;
+ }
+ else
+ r = cxt->childval;
+
+ /* For now */
+ if (r != -3) /* don't do this if we indicate there will be other matches */
+ r = _rl_subseq_result (r, cxt->oldmap, cxt->okey, (cxt->flags & KSEQ_SUBSEQ));
+
+ RL_CHECK_SIGNALS ();
+ /* We only treat values < 0 specially to simulate recursion. */
+ if (r >= 0 || (r == -1 && (cxt->flags & KSEQ_SUBSEQ) == 0)) /* success! or failure! */
+ {
+ _rl_keyseq_chain_dispose ();
+ RL_UNSETSTATE (RL_STATE_MULTIKEY);
+ return r;
+ }
+
+ if (r != -3) /* magic value that says we added to the chain */
+ _rl_kscxt = cxt->ocxt;
+ if (_rl_kscxt)
+ _rl_kscxt->childval = r;
+ if (r != -3)
+ _rl_keyseq_cxt_dispose (cxt);
+
+ return r;
+}
+#endif /* READLINE_CALLBACKS */
+
+/* Do the command associated with KEY in MAP.
+ If the associated command is really a keymap, then read
+ another key, and dispatch into that map. */
+int
+_rl_dispatch (key, map)
+ register int key;
+ Keymap map;
+{
+ _rl_dispatching_keymap = map;
+ return _rl_dispatch_subseq (key, map, 0);
+}
+
+int
+_rl_dispatch_subseq (key, map, got_subseq)
+ register int key;
+ Keymap map;
+ int got_subseq;
+{
+ int r, newkey;
+ char *macro;
+ rl_command_func_t *func;
+#if defined (READLINE_CALLBACKS)
+ _rl_keyseq_cxt *cxt;
+#endif
+
+ if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii)
+ {
+ if (map[ESC].type == ISKMAP)
+ {
+ if (RL_ISSTATE (RL_STATE_MACRODEF))
+ _rl_add_macro_char (ESC);
+ RESIZE_KEYSEQ_BUFFER ();
+ rl_executing_keyseq[rl_key_sequence_length++] = ESC;
+ map = FUNCTION_TO_KEYMAP (map, ESC);
+ key = UNMETA (key);
+ return (_rl_dispatch (key, map));
+ }
+ else
+ rl_ding ();
+ return 0;
+ }
+
+ if (RL_ISSTATE (RL_STATE_MACRODEF))
+ _rl_add_macro_char (key);
+
+ r = 0;
+ switch (map[key].type)
+ {
+ case ISFUNC:
+ func = map[key].function;
+ if (func)
+ {
+ /* Special case rl_do_lowercase_version (). */
+ if (func == rl_do_lowercase_version)
+ /* Should we do anything special if key == ANYOTHERKEY? */
+ return (_rl_dispatch (_rl_to_lower (key), map));
+
+ rl_executing_keymap = map;
+ rl_executing_key = key;
+
+ RESIZE_KEYSEQ_BUFFER();
+ rl_executing_keyseq[rl_key_sequence_length++] = key;
+ rl_executing_keyseq[rl_key_sequence_length] = '\0';
+
+ rl_dispatching = 1;
+ RL_SETSTATE(RL_STATE_DISPATCHING);
+ r = (*func) (rl_numeric_arg * rl_arg_sign, key);
+ RL_UNSETSTATE(RL_STATE_DISPATCHING);
+ rl_dispatching = 0;
+
+ /* If we have input pending, then the last command was a prefix
+ command. Don't change the state of rl_last_func. Otherwise,
+ remember the last command executed in this variable. */
+ if (rl_pending_input == 0 && map[key].function != rl_digit_argument)
+ rl_last_func = map[key].function;
+
+ RL_CHECK_SIGNALS ();
+ }
+ else if (map[ANYOTHERKEY].function)
+ {
+ /* OK, there's no function bound in this map, but there is a
+ shadow function that was overridden when the current keymap
+ was created. Return -2 to note that. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ return -2;
+ }
+ else if (got_subseq)
+ {
+ /* Return -1 to note that we're in a subsequence, but we don't
+ have a matching key, nor was one overridden. This means
+ we need to back up the recursion chain and find the last
+ subsequence that is bound to a function. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ return -1;
+ }
+ else
+ {
+#if defined (READLINE_CALLBACKS)
+ RL_UNSETSTATE (RL_STATE_MULTIKEY);
+ _rl_keyseq_chain_dispose ();
+#endif
+ _rl_abort_internal ();
+ return -1;
+ }
+ break;
+
+ case ISKMAP:
+ if (map[key].function != 0)
+ {
+#if defined (VI_MODE)
+ /* The only way this test will be true is if a subsequence has been
+ bound starting with ESC, generally the arrow keys. What we do is
+ check whether there's input in the queue, which there generally
+ will be if an arrow key has been pressed, and, if there's not,
+ just dispatch to (what we assume is) rl_vi_movement_mode right
+ away. This is essentially an input test with a zero timeout (by
+ default) or a timeout determined by the value of `keyseq-timeout' */
+ /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+ takes microseconds, so multiply by 1000 */
+ if (rl_editing_mode == vi_mode && key == ESC && map == vi_insertion_keymap
+ && _rl_input_queued ((_rl_keyseq_timeout > 0) ? _rl_keyseq_timeout*1000 : 0) == 0)
+ return (_rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key)));
+#endif
+
+ RESIZE_KEYSEQ_BUFFER ();
+ rl_executing_keyseq[rl_key_sequence_length++] = key;
+ _rl_dispatching_keymap = FUNCTION_TO_KEYMAP (map, key);
+
+ /* Allocate new context here. Use linked contexts (linked through
+ cxt->ocxt) to simulate recursion */
+#if defined (READLINE_CALLBACKS)
+ if (RL_ISSTATE (RL_STATE_CALLBACK))
+ {
+ /* Return 0 only the first time, to indicate success to
+ _rl_callback_read_char. The rest of the time, we're called
+ from _rl_dispatch_callback, so we return -3 to indicate
+ special handling is necessary. */
+ r = RL_ISSTATE (RL_STATE_MULTIKEY) ? -3 : 0;
+ cxt = _rl_keyseq_cxt_alloc ();
+
+ if (got_subseq)
+ cxt->flags |= KSEQ_SUBSEQ;
+ cxt->okey = key;
+ cxt->oldmap = map;
+ cxt->dmap = _rl_dispatching_keymap;
+ cxt->subseq_arg = got_subseq || cxt->dmap[ANYOTHERKEY].function;
+
+ RL_SETSTATE (RL_STATE_MULTIKEY);
+ _rl_kscxt = cxt;
+
+ return r; /* don't indicate immediate success */
+ }
+#endif
+
+ /* Tentative inter-character timeout for potential multi-key
+ sequences? If no input within timeout, abort sequence and
+ act as if we got non-matching input. */
+ /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+ takes microseconds, so multiply by 1000 */
+ if (_rl_keyseq_timeout > 0 &&
+ (RL_ISSTATE (RL_STATE_INPUTPENDING|RL_STATE_MACROINPUT) == 0) &&
+ _rl_pushed_input_available () == 0 &&
+ _rl_dispatching_keymap[ANYOTHERKEY].function &&
+ _rl_input_queued (_rl_keyseq_timeout*1000) == 0)
+ return (_rl_subseq_result (-2, map, key, got_subseq));
+
+ newkey = _rl_subseq_getchar (key);
+ if (newkey < 0)
+ {
+ _rl_abort_internal ();
+ return -1;
+ }
+
+ r = _rl_dispatch_subseq (newkey, _rl_dispatching_keymap, got_subseq || map[ANYOTHERKEY].function);
+ return _rl_subseq_result (r, map, key, got_subseq);
+ }
+ else
+ {
+ _rl_abort_internal ();
+ return -1;
+ }
+ break;
+
+ case ISMACR:
+ if (map[key].function != 0)
+ {
+ rl_executing_keyseq[rl_key_sequence_length] = '\0';
+ macro = savestring ((char *)map[key].function);
+ _rl_with_macro_input (macro);
+ return 0;
+ }
+ break;
+ }
+#if defined (VI_MODE)
+ if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap &&
+ key != ANYOTHERKEY &&
+ rl_key_sequence_length == 1 && /* XXX */
+ _rl_vi_textmod_command (key))
+ _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign);
+#endif
+
+ return (r);
+}
+
+static int
+_rl_subseq_result (r, map, key, got_subseq)
+ int r;
+ Keymap map;
+ int key, got_subseq;
+{
+ Keymap m;
+ int type, nt;
+ rl_command_func_t *func, *nf;
+
+ if (r == -2)
+ /* We didn't match anything, and the keymap we're indexed into
+ shadowed a function previously bound to that prefix. Call
+ the function. The recursive call to _rl_dispatch_subseq has
+ already taken care of pushing any necessary input back onto
+ the input queue with _rl_unget_char. */
+ {
+ m = _rl_dispatching_keymap;
+ type = m[ANYOTHERKEY].type;
+ func = m[ANYOTHERKEY].function;
+ if (type == ISFUNC && func == rl_do_lowercase_version)
+ r = _rl_dispatch (_rl_to_lower (key), map);
+ else if (type == ISFUNC && func == rl_insert)
+ {
+ /* If the function that was shadowed was self-insert, we
+ somehow need a keymap with map[key].func == self-insert.
+ Let's use this one. */
+ nt = m[key].type;
+ nf = m[key].function;
+
+ m[key].type = type;
+ m[key].function = func;
+ r = _rl_dispatch (key, m);
+ m[key].type = nt;
+ m[key].function = nf;
+ }
+ else
+ r = _rl_dispatch (ANYOTHERKEY, m);
+ }
+ else if (r && map[ANYOTHERKEY].function)
+ {
+ /* We didn't match (r is probably -1), so return something to
+ tell the caller that it should try ANYOTHERKEY for an
+ overridden function. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -2;
+ }
+ else if (r && got_subseq)
+ {
+ /* OK, back up the chain. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -1;
+ }
+
+ return r;
+}
+
+/* **************************************************************** */
+/* */
+/* Initializations */
+/* */
+/* **************************************************************** */
+
+/* Initialize readline (and terminal if not already). */
+int
+rl_initialize ()
+{
+ /* If we have never been called before, initialize the
+ terminal and data structures. */
+ if (!rl_initialized)
+ {
+ RL_SETSTATE(RL_STATE_INITIALIZING);
+ readline_initialize_everything ();
+ RL_UNSETSTATE(RL_STATE_INITIALIZING);
+ rl_initialized++;
+ RL_SETSTATE(RL_STATE_INITIALIZED);
+ }
+
+ /* Initialize the current line information. */
+ _rl_init_line_state ();
+
+ /* We aren't done yet. We haven't even gotten started yet! */
+ rl_done = 0;
+ RL_UNSETSTATE(RL_STATE_DONE);
+
+ /* Tell the history routines what is going on. */
+ _rl_start_using_history ();
+
+ /* Make the display buffer match the state of the line. */
+ rl_reset_line_state ();
+
+ /* No such function typed yet. */
+ rl_last_func = (rl_command_func_t *)NULL;
+
+ /* Parsing of key-bindings begins in an enabled state. */
+ _rl_parsing_conditionalized_out = 0;
+
+#if defined (VI_MODE)
+ if (rl_editing_mode == vi_mode)
+ _rl_vi_initialize_line ();
+#endif
+
+ /* Each line starts in insert mode (the default). */
+ _rl_set_insert_mode (RL_IM_DEFAULT, 1);
+
+ return 0;
+}
+
+#if 0
+#if defined (__EMX__)
+static void
+_emx_build_environ ()
+{
+ TIB *tibp;
+ PIB *pibp;
+ char *t, **tp;
+ int c;
+
+ DosGetInfoBlocks (&tibp, &pibp);
+ t = pibp->pib_pchenv;
+ for (c = 1; *t; c++)
+ t += strlen (t) + 1;
+ tp = environ = (char **)xmalloc ((c + 1) * sizeof (char *));
+ t = pibp->pib_pchenv;
+ while (*t)
+ {
+ *tp++ = t;
+ t += strlen (t) + 1;
+ }
+ *tp = 0;
+}
+#endif /* __EMX__ */
+#endif
+
+/* Initialize the entire state of the world. */
+static void
+readline_initialize_everything ()
+{
+#if 0
+#if defined (__EMX__)
+ if (environ == 0)
+ _emx_build_environ ();
+#endif
+#endif
+
+#if 0
+ /* Find out if we are running in Emacs -- UNUSED. */
+ running_in_emacs = sh_get_env_value ("EMACS") != (char *)0;
+#endif
+
+ /* Set up input and output if they are not already set up. */
+ if (!rl_instream)
+ rl_instream = stdin;
+
+ if (!rl_outstream)
+ rl_outstream = stdout;
+
+ /* Bind _rl_in_stream and _rl_out_stream immediately. These values
+ may change, but they may also be used before readline_internal ()
+ is called. */
+ _rl_in_stream = rl_instream;
+ _rl_out_stream = rl_outstream;
+
+ /* Allocate data structures. */
+ if (rl_line_buffer == 0)
+ rl_line_buffer = (char *)xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE);
+
+ /* Initialize the terminal interface. */
+ if (rl_terminal_name == 0)
+ rl_terminal_name = sh_get_env_value ("TERM");
+ _rl_init_terminal_io (rl_terminal_name);
+
+ /* Bind tty characters to readline functions. */
+ readline_default_bindings ();
+
+ /* Initialize the function names. */
+ rl_initialize_funmap ();
+
+ /* Decide whether we should automatically go into eight-bit mode. */
+ _rl_init_eightbit ();
+
+ /* Read in the init file. */
+ rl_read_init_file ((char *)NULL);
+
+ /* XXX */
+ if (_rl_horizontal_scroll_mode && _rl_term_autowrap)
+ {
+ _rl_screenwidth--;
+ _rl_screenchars -= _rl_screenheight;
+ }
+
+ /* Override the effect of any `set keymap' assignments in the
+ inputrc file. */
+ rl_set_keymap_from_edit_mode ();
+
+ /* Try to bind a common arrow key prefix, if not already bound. */
+ bind_arrow_keys ();
+
+ /* If the completion parser's default word break characters haven't
+ been set yet, then do so now. */
+ if (rl_completer_word_break_characters == (char *)NULL)
+ rl_completer_word_break_characters = (char *)rl_basic_word_break_characters;
+
+#if defined (COLOR_SUPPORT)
+ if (_rl_colored_stats)
+ _rl_parse_colors ();
+#endif
+
+ rl_executing_keyseq = malloc (_rl_executing_keyseq_size = 16);
+ if (rl_executing_keyseq)
+ rl_executing_keyseq[0] = '\0';
+}
+
+/* If this system allows us to look at the values of the regular
+ input editing characters, then bind them to their readline
+ equivalents, iff the characters are not bound to keymaps. */
+static void
+readline_default_bindings ()
+{
+ if (_rl_bind_stty_chars)
+ rl_tty_set_default_bindings (_rl_keymap);
+}
+
+/* Reset the default bindings for the terminal special characters we're
+ interested in back to rl_insert and read the new ones. */
+static void
+reset_default_bindings ()
+{
+ if (_rl_bind_stty_chars)
+ {
+ rl_tty_unset_default_bindings (_rl_keymap);
+ rl_tty_set_default_bindings (_rl_keymap);
+ }
+}
+
+/* Bind some common arrow key sequences in MAP. */
+static void
+bind_arrow_keys_internal (map)
+ Keymap map;
+{
+ Keymap xkeymap;
+
+ xkeymap = _rl_keymap;
+ _rl_keymap = map;
+
+#if defined (__MSDOS__)
+ rl_bind_keyseq_if_unbound ("\033[0A", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\033[0B", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\033[0C", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\033[0D", rl_get_next_history);
+#endif
+
+ rl_bind_keyseq_if_unbound ("\033[A", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\033[B", rl_get_next_history);
+ rl_bind_keyseq_if_unbound ("\033[C", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\033[D", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\033[H", rl_beg_of_line);
+ rl_bind_keyseq_if_unbound ("\033[F", rl_end_of_line);
+
+ rl_bind_keyseq_if_unbound ("\033OA", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\033OB", rl_get_next_history);
+ rl_bind_keyseq_if_unbound ("\033OC", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\033OD", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\033OH", rl_beg_of_line);
+ rl_bind_keyseq_if_unbound ("\033OF", rl_end_of_line);
+
+#if defined (__MINGW32__)
+ rl_bind_keyseq_if_unbound ("\340H", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\340P", rl_get_next_history);
+ rl_bind_keyseq_if_unbound ("\340M", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\340K", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\340G", rl_beg_of_line);
+ rl_bind_keyseq_if_unbound ("\340O", rl_end_of_line);
+ rl_bind_keyseq_if_unbound ("\340S", rl_delete);
+ rl_bind_keyseq_if_unbound ("\340R", rl_overwrite_mode);
+
+ /* These may or may not work because of the embedded NUL. */
+ rl_bind_keyseq_if_unbound ("\\000H", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\\000P", rl_get_next_history);
+ rl_bind_keyseq_if_unbound ("\\000M", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\\000K", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\\000G", rl_beg_of_line);
+ rl_bind_keyseq_if_unbound ("\\000O", rl_end_of_line);
+ rl_bind_keyseq_if_unbound ("\\000S", rl_delete);
+ rl_bind_keyseq_if_unbound ("\\000R", rl_overwrite_mode);
+#endif
+
+ _rl_keymap = xkeymap;
+}
+
+/* Try and bind the common arrow key prefixes after giving termcap and
+ the inputrc file a chance to bind them and create `real' keymaps
+ for the arrow key prefix. */
+static void
+bind_arrow_keys ()
+{
+ bind_arrow_keys_internal (emacs_standard_keymap);
+
+#if defined (VI_MODE)
+ bind_arrow_keys_internal (vi_movement_keymap);
+ /* Unbind vi_movement_keymap[ESC] to allow users to repeatedly hit ESC
+ in vi command mode while still allowing the arrow keys to work. */
+ if (vi_movement_keymap[ESC].type == ISKMAP)
+ rl_bind_keyseq_in_map ("\033", (rl_command_func_t *)NULL, vi_movement_keymap);
+ bind_arrow_keys_internal (vi_insertion_keymap);
+#endif
+}
+
+/* **************************************************************** */
+/* */
+/* Saving and Restoring Readline's state */
+/* */
+/* **************************************************************** */
+
+int
+rl_save_state (sp)
+ struct readline_state *sp;
+{
+ if (sp == 0)
+ return -1;
+
+ sp->point = rl_point;
+ sp->end = rl_end;
+ sp->mark = rl_mark;
+ sp->buffer = rl_line_buffer;
+ sp->buflen = rl_line_buffer_len;
+ sp->ul = rl_undo_list;
+ sp->prompt = rl_prompt;
+
+ sp->rlstate = rl_readline_state;
+ sp->done = rl_done;
+ sp->kmap = _rl_keymap;
+
+ sp->lastfunc = rl_last_func;
+ sp->insmode = rl_insert_mode;
+ sp->edmode = rl_editing_mode;
+ sp->kseqlen = rl_key_sequence_length;
+ sp->inf = rl_instream;
+ sp->outf = rl_outstream;
+ sp->pendingin = rl_pending_input;
+ sp->macro = rl_executing_macro;
+
+ sp->catchsigs = rl_catch_signals;
+ sp->catchsigwinch = rl_catch_sigwinch;
+
+ return (0);
+}
+
+int
+rl_restore_state (sp)
+ struct readline_state *sp;
+{
+ if (sp == 0)
+ return -1;
+
+ rl_point = sp->point;
+ rl_end = sp->end;
+ rl_mark = sp->mark;
+ the_line = rl_line_buffer = sp->buffer;
+ rl_line_buffer_len = sp->buflen;
+ rl_undo_list = sp->ul;
+ rl_prompt = sp->prompt;
+
+ rl_readline_state = sp->rlstate;
+ rl_done = sp->done;
+ _rl_keymap = sp->kmap;
+
+ rl_last_func = sp->lastfunc;
+ rl_insert_mode = sp->insmode;
+ rl_editing_mode = sp->edmode;
+ rl_key_sequence_length = sp->kseqlen;
+ rl_instream = sp->inf;
+ rl_outstream = sp->outf;
+ rl_pending_input = sp->pendingin;
+ rl_executing_macro = sp->macro;
+
+ rl_catch_signals = sp->catchsigs;
+ rl_catch_sigwinch = sp->catchsigwinch;
+
+ return (0);
+}
projects / thirdparty / bash.git / commitdiff
