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readline.h

/* Readline.h -- the names of functions callable from within readline. */

/* 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,
   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */

#if !defined (_READLINE_H_)
#define _READLINE_H_

#ifdef __cplusplus
extern "C" {
#endif

#if defined (READLINE_LIBRARY)
#  include "keymaps.h"
#  include "tilde.h"
#else
#  include <readline/keymaps.h>
#  include <readline/tilde.h>
#endif

/* Readline data structures. */

/* Maintaining the state of undo.  We remember individual deletes and inserts
   on a chain of things to do. */

/* The actions that undo knows how to undo.  Notice that UNDO_DELETE means
   to insert some text, and UNDO_INSERT means to delete some text.   I.e.,
   the code tells undo what to undo, not how to undo it. */
enum undo_code { UNDO_DELETE, UNDO_INSERT, UNDO_BEGIN, UNDO_END };

/* What an element of THE_UNDO_LIST looks like. */
typedef struct undo_list {
  struct undo_list *next;
  int start, end;       /* Where the change took place. */
  char *text;                 /* The text to insert, if undoing a delete. */
  enum undo_code what;        /* Delete, Insert, Begin, End. */
} UNDO_LIST;

/* The current undo list for RL_LINE_BUFFER. */
extern UNDO_LIST *rl_undo_list;

/* The data structure for mapping textual names to code addresses. */
typedef struct _funmap {
  char *name;
  Function *function;
} FUNMAP;

extern FUNMAP **funmap;

/* Functions available to bind to key sequences. */
extern int
  rl_tilde_expand (), rl_set_mark (), rl_exchange_point_and_mark (),
  rl_beg_of_line (), rl_backward (), rl_delete (), rl_end_of_line (),
  rl_forward (), ding (), rl_newline (), rl_kill_line (),
  rl_copy_region_to_kill (), rl_kill_region (), rl_char_search (),
  rl_clear_screen (), rl_get_next_history (), rl_get_previous_history (),
  rl_quoted_insert (), rl_reverse_search_history (), rl_transpose_chars (),
  rl_unix_line_discard (), rl_unix_word_rubout (),
  rl_yank (), rl_rubout (), rl_backward_word (), rl_kill_word (),
  rl_forward_word (), rl_tab_insert (), rl_yank_pop (), rl_yank_nth_arg (),
  rl_backward_kill_word (), rl_backward_kill_line (), rl_transpose_words (),
  rl_complete (), rl_possible_completions (), rl_insert_completions (),
  rl_do_lowercase_version (), rl_kill_full_line (),
  rl_digit_argument (), rl_universal_argument (), rl_abort (),
  rl_undo_command (), rl_revert_line (), rl_beginning_of_history (),
  rl_end_of_history (), rl_forward_search_history (), rl_insert (),
  rl_upcase_word (), rl_downcase_word (), rl_capitalize_word (),
  rl_restart_output (), rl_re_read_init_file (),
  rl_dump_functions (), rl_dump_variables (), rl_dump_macros (),
  rl_delete_horizontal_space (), rl_history_search_forward (),
  rl_history_search_backward (), rl_tty_status (), rl_yank_last_arg (),
  rl_insert_comment (), rl_backward_char_search (),
  rl_copy_forward_word (), rl_copy_backward_word ();

/* Not available unless readline is compiled -DPAREN_MATCHING. */
extern int rl_insert_close ();

/* Not available unless READLINE_CALLBACKS is defined. */
extern void rl_callback_handler_install ();
extern void rl_callback_read_char ();
extern void rl_callback_handler_remove ();

/* These are *both* defined even when VI_MODE is not. */
extern int rl_vi_editing_mode (), rl_emacs_editing_mode ();

/* Non incremental history searching. */
extern int
  rl_noninc_forward_search (), rl_noninc_reverse_search (),
  rl_noninc_forward_search_again (), rl_noninc_reverse_search_again ();

/* Things for vi mode. Not available unless readline is compiled -DVI_MODE. */
extern int rl_vi_check ();
extern int
  rl_vi_undo (), rl_vi_redo (), rl_vi_tilde_expand (),
  rl_vi_movement_mode (), rl_vi_insertion_mode (), rl_vi_arg_digit (),
  rl_vi_prev_word (), rl_vi_next_word (), rl_vi_char_search (),
  rl_vi_eof_maybe (), rl_vi_append_mode (), rl_vi_put (),
  rl_vi_append_eol (), rl_vi_insert_beg (), rl_vi_delete (),
  rl_vi_first_print (), rl_vi_fword (), rl_vi_fWord (), rl_vi_bword (),
  rl_vi_bWord (), rl_vi_eword (), rl_vi_eWord (), rl_vi_end_word (),
  rl_vi_change_case (), rl_vi_match (), rl_vi_bracktype (),
  rl_vi_change_char (), rl_vi_yank_arg (), rl_vi_search (),
  rl_vi_search_again (),  rl_vi_subst (), rl_vi_overstrike (),
  rl_vi_overstrike_delete (), rl_vi_replace(), rl_vi_column (),
  rl_vi_delete_to (), rl_vi_change_to (), rl_vi_yank_to (),
  rl_vi_complete (), rl_vi_fetch_history (), rl_vi_set_mark (),
  rl_vi_goto_mark (), rl_vi_back_to_indent ();

/* Keyboard macro commands. */
extern int rl_start_kbd_macro (), rl_end_kbd_macro ();
extern int rl_call_last_kbd_macro ();
extern void rl_push_macro_input ();

extern int rl_arrow_keys(), rl_refresh_line ();

/* **************************************************************** */
/*                                                  */
/*                Well Published Functions                */
/*                                                  */
/* **************************************************************** */

/* Readline functions. */
/* Read a line of input.  Prompt with PROMPT.  A NULL PROMPT means none. */
extern char *readline ();

/* These functions are from bind.c. */
/* rl_add_defun (char *name, Function *function, int key)
   Add NAME to the list of named functions.  Make FUNCTION
   be the function that gets called.
   If KEY is not -1, then bind it. */
extern int rl_add_defun ();

extern Keymap rl_make_bare_keymap ();
extern Keymap rl_copy_keymap ();
extern Keymap rl_make_keymap ();
extern void rl_discard_keymap ();
extern Keymap rl_get_keymap (), rl_get_keymap_by_name ();
extern void rl_set_keymap ();
extern char *rl_get_keymap_name ();

extern int rl_bind_key (), rl_bind_key_in_map ();
extern int rl_unbind_key (), rl_unbind_key_in_map ();
extern int rl_set_key ();
extern int rl_generic_bind ();
extern int rl_parse_and_bind ();
/* Backwards compatibility, use rl_generic_bind instead. */
extern int rl_macro_bind (), rl_variable_bind ();

extern int rl_read_init_file ();

extern Function *rl_named_function (), *rl_function_of_keyseq ();
extern char **rl_invoking_keyseqs (), **rl_invoking_keyseqs_in_map ();
extern void rl_function_dumper ();
extern void rl_variable_dumper ();
extern void rl_macro_dumper ();
extern void rl_list_funmap_names ();

/* Undocumented in the texinfo manual; not really useful to programs. */
extern int rl_translate_keyseq ();
extern void rl_initialize_funmap ();

/* Functions for undoing. */
extern int rl_begin_undo_group (), rl_end_undo_group ();
extern void rl_add_undo (), free_undo_list ();
extern int rl_do_undo ();
extern int rl_modifying ();

/* Functions for redisplay. */
extern void rl_redisplay ();
extern int rl_forced_update_display ();
extern int rl_clear_message ();
extern int rl_reset_line_state ();
extern int rl_on_new_line ();

#if defined (__STDC__) && defined (USE_VARARGS) && defined (PREFER_STDARG)
extern int rl_message (const char *, ...);
#else
extern int rl_message ();
#endif

/* Undocumented in texinfo manual. */
extern int rl_character_len ();
extern int rl_show_char ();
extern int crlf ();

/* Modifying text. */
extern int rl_insert_text (), rl_delete_text ();
extern int rl_kill_text ();
extern char *rl_copy_text ();

/* `Public' utility functions. */
extern int rl_reset_terminal ();
extern void rl_resize_terminal ();
extern int rl_stuff_char ();
extern int rl_read_key (), rl_getc ();

extern int rl_initialize ();

/* Undocumented. */
extern int rl_expand_prompt ();
extern int rl_set_signals (), rl_clear_signals ();
extern int maybe_save_line (), maybe_unsave_line (), maybe_replace_line ();

/* Completion functions. */
/* These functions are from complete.c. */
extern int rl_complete_internal ();

/* Return an array of strings which are the result of repeatadly calling
   FUNC with TEXT. */
extern char **completion_matches ();
extern char *username_completion_function ();
extern char *filename_completion_function ();

/* **************************************************************** */
/*                                                  */
/*                Well Published Variables                */
/*                                                  */
/* **************************************************************** */

/* The version of this incarnation of the readline library. */
extern char *rl_library_version;

/* The name of the calling program.  You should initialize this to
   whatever was in argv[0].  It is used when parsing conditionals. */
extern char *rl_readline_name;

/* The prompt readline uses.  This is set from the argument to
   readline (), and should not be assigned to directly. */
extern char *rl_prompt;

/* The line buffer that is in use. */
extern char *rl_line_buffer;

/* The location of point, and end. */
extern int rl_point, rl_end;

extern int rl_mark;

extern int rl_done;

extern int rl_pending_input;

/* 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. */
extern int rl_dispatching;

/* The name of the terminal to use. */
extern char *rl_terminal_name;

/* The input and output streams. */
extern FILE *rl_instream, *rl_outstream;

/* If non-zero, then this is the address of a function to call just
   before readline_internal () prints the first prompt. */
extern Function *rl_startup_hook;

/* The address of a function to call periodically while Readline is
   awaiting character input, or NULL, for no event handling. */
extern Function *rl_event_hook;

extern Function *rl_getc_function;
extern VFunction *rl_redisplay_function;
extern VFunction *rl_prep_term_function;
extern VFunction *rl_deprep_term_function;

/* Dispatch variables. */
extern Keymap rl_executing_keymap;
extern Keymap rl_binding_keymap;

/* Completion variables. */
/* Pointer to the generator function for completion_matches ().
   NULL means to use filename_entry_function (), the default filename
   completer. */
extern Function *rl_completion_entry_function;

/* If rl_ignore_some_completions_function is non-NULL it is the address
   of a function to call after all of the possible matches have been
   generated, but before the actual completion is done to the input line.
   The function is called with one argument; a NULL terminated array
   of (char *).  If your function removes any of the elements, they
   must be free()'ed. */
extern Function *rl_ignore_some_completions_function;

/* Pointer to alternative function to create matches.
   Function is called with TEXT, START, and END.
   START and END are indices in RL_LINE_BUFFER saying what the boundaries
   of TEXT are.
   If this function exists and returns NULL then call the value of
   rl_completion_entry_function to try to match, otherwise use the
   array of strings returned. */
extern CPPFunction *rl_attempted_completion_function;

/* The basic list of characters that signal a break between words for the
   completer routine.  The initial contents of this variable is what
   breaks words in the shell, i.e. "n\"\\'`@$>". */
extern char *rl_basic_word_break_characters;

/* The list of characters that signal a break between words for
   rl_complete_internal.  The default list is the contents of
   rl_basic_word_break_characters.  */
extern char *rl_completer_word_break_characters;

/* List of characters which can be used to quote a substring of the line.
   Completion occurs on the entire substring, and within the substring   
   rl_completer_word_break_characters are treated as any other character,
   unless they also appear within this list. */
extern char *rl_completer_quote_characters;

/* List of quote characters which cause a word break. */
extern char *rl_basic_quote_characters;

/* List of characters that need to be quoted in filenames by the completer. */
extern char *rl_filename_quote_characters;

/* List of characters that are word break characters, but should be left
   in TEXT when it is passed to the completion function.  The shell uses
   this to help determine what kind of completing to do. */
extern char *rl_special_prefixes;

/* If non-zero, then this is the address of a function to call when
   completing on a directory name.  The function is called with
   the address of a string (the current directory name) as an arg. */
extern Function *rl_directory_completion_hook;

/* Backwards compatibility with previous versions of readline. */
#define rl_symbolic_link_hook rl_directory_completion_hook

/* Non-zero means that the results of the matches are to be treated
   as filenames.  This is ALWAYS zero on entry, and can only be changed
   within a completion entry finder function. */
extern int rl_filename_completion_desired;

/* Non-zero means that the results of the matches are to be quoted using
   double quotes (or an application-specific quoting mechanism) if the
   filename contains any characters in rl_word_break_chars.  This is
   ALWAYS non-zero on entry, and can only be changed within a completion
   entry finder function. */
extern int rl_filename_quoting_desired;

/* Set to a function to quote a filename in an application-specific fashion.
   Called with the text to quote, the type of match found (single or multiple)
   and a pointer to the quoting character to be used, which the function can
   reset if desired. */
extern CPFunction *rl_filename_quoting_function;

/* Function to call to remove quoting characters from a filename.  Called
   before completion is attempted, so the embedded quotes do not interfere
   with matching names in the file system. */
extern CPFunction *rl_filename_dequoting_function;

/* Function to call to decide whether or not a word break character is
   quoted.  If a character is quoted, it does not break words for the
   completer. */
extern Function *rl_char_is_quoted_p;

/* Non-zero means to suppress normal filename completion after the
   user-specified completion function has been called. */
extern int rl_attempted_completion_over;

/* Set to a character describing the type of completion being attempted by
   rl_complete_internal; available for use by application completion
   functions. */
extern int rl_completion_type;

/* Character appended to completed words when at the end of the line.  The
   default is a space.  Nothing is added if this is '\0'. */
extern int rl_completion_append_character;

/* Up to this many items will be displayed in response to a
   possible-completions call.  After that, we ask the user if she
   is sure she wants to see them all.  The default value is 100. */
extern int rl_completion_query_items;

/* If non-zero, then disallow duplicates in the matches. */
extern int rl_ignore_completion_duplicates;

/* If this is non-zero, completion is (temporarily) inhibited, and the
   completion character will be inserted as any other. */
extern int rl_inhibit_completion;
   
/* Definitions available for use by readline clients. */
#define RL_PROMPT_START_IGNORE      '\001'
#define RL_PROMPT_END_IGNORE  '\002'

/* Possible values for do_replace argument to rl_filename_quoting_function,
   called by rl_complete_internal. */
#define NO_MATCH        0
#define SINGLE_MATCH    1
#define MULT_MATCH      2

#if !defined (savestring)
extern char *savestring ();   /* XXX backwards compatibility */
#endif

#ifdef __cplusplus
}
#endif

#endif /* _READLINE_H_ */

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