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,
   675 Mass Ave, Cambridge, MA 02139, USA. */

#if !defined (_READLINE_H_)
#define _READLINE_H_

#  include "keymaps.h"
#  include "tilde.h"

/* The functions for manipulating the text of the line within readline.
Most of these functions are bound to keys by default. */
extern int
  rl_tilde_expand (),
  rl_beg_of_line (), rl_backward (), rl_delete (), rl_end_of_line (),
  rl_forward (), ding (), rl_backward (), rl_newline (), rl_kill_line (),
  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_quoted_insert (), 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_delete_horizontal_space (), rl_history_search_forward (),
  rl_history_search_backward (), rl_tty_status (), rl_yank_last_arg ();

/* `Public' utility functions. */
extern int rl_insert_text (), rl_delete_text (), rl_kill_text ();
extern int rl_complete_internal ();
extern int rl_expand_prompt ();
extern int rl_initialize ();
extern int rl_set_signals (), rl_clear_signals ();
extern int rl_init_argument (), rl_digit_argument ();
extern int rl_read_key (), rl_getc (), rl_stuff_char ();
extern int maybe_save_line (), maybe_unsave_line (), maybe_replace_line ();
extern int rl_modifying ();

extern int rl_begin_undo_group (), rl_end_undo_group ();
extern void rl_add_undo (), free_undo_list ();
extern int rl_do_undo ();

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

/* 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 (), rl_vi_textmod_command ();
extern int
  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_comment (),
  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 ();

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

extern int rl_arrow_keys(), rl_refresh_line ();

/* 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 {
  char *name;
  Function *function;
} FUNMAP;

extern FUNMAP **funmap;

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

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

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

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

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

/* 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 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;

/* 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;

/* 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;

/* 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

/* 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;

/* Non-zero means that modified history lines are preceded
   with an asterisk. */
extern int rl_show_star;

/* 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;

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

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

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

/* These functions are from complete.c. */
/* 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 ();

/* 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 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_macro_bind (), rl_generic_bind (), rl_variable_bind ();
extern int rl_translate_keyseq ();
extern Function *rl_named_function (), *rl_function_of_keyseq ();
extern int rl_parse_and_bind ();
extern Keymap rl_get_keymap (), rl_get_keymap_by_name ();
extern void rl_set_keymap ();
extern char **rl_invoking_keyseqs (), **rl_invoking_keyseqs_in_map ();
extern void rl_function_dumper ();
extern int rl_read_init_file ();

/* Functions in funmap.c */
extern void rl_list_funmap_names ();
extern void rl_initialize_funmap ();

/* Functions in display.c */
extern void rl_redisplay ();
extern int rl_message (), rl_clear_message ();
extern int rl_reset_line_state ();
extern int rl_character_len ();
extern int rl_show_char ();
extern int crlf (), rl_on_new_line ();
extern int rl_forced_update_display ();

/* Definitions available for use by readline clients. */
#define RL_PROMPT_START_IGNORE  '\001'
#define RL_PROMPT_END_IGNORE    '\002'

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

#endif /* _READLINE_H_ */