279 lines
9.8 KiB
C
279 lines
9.8 KiB
C
/* Header file for command-reading library command.c.
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Copyright (C) 1986, 1989, 1990, 2000 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#if !defined (COMMAND_H)
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#define COMMAND_H 1
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/* Command classes are top-level categories into which commands are broken
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down for "help" purposes.
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Notes on classes: class_alias is for alias commands which are not
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abbreviations of the original command. class-pseudo is for
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commands which are not really commands nor help topics ("stop"). */
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enum command_class
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{
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/* Special args to help_list */
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class_deprecated, all_classes = -2, all_commands = -1,
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/* Classes of commands */
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no_class = -1, class_run = 0, class_vars, class_stack,
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class_files, class_support, class_info, class_breakpoint, class_trace,
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class_alias, class_obscure, class_user, class_maintenance,
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class_pseudo, class_tui, class_xdb,
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};
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/* Not a set/show command. Note that some commands which begin with
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"set" or "show" might be in this category, if their syntax does
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not fall into one of the following categories. */
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typedef enum cmd_types
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{
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not_set_cmd,
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set_cmd,
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show_cmd
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}
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cmd_types;
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/* Types of "set" or "show" command. */
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typedef enum var_types
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{
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/* "on" or "off". *VAR is an integer which is nonzero for on,
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zero for off. */
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var_boolean,
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/* Unsigned Integer. *VAR is an unsigned int. The user can type 0
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to mean "unlimited", which is stored in *VAR as UINT_MAX. */
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var_uinteger,
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/* Like var_uinteger but signed. *VAR is an int. The user can type 0
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to mean "unlimited", which is stored in *VAR as INT_MAX. */
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var_integer,
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/* String which the user enters with escapes (e.g. the user types \n and
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it is a real newline in the stored string).
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*VAR is a malloc'd string, or NULL if the string is empty. */
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var_string,
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/* String which stores what the user types verbatim.
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*VAR is a malloc'd string, or NULL if the string is empty. */
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var_string_noescape,
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/* String which stores a filename.
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*VAR is a malloc'd string, or NULL if the string is empty. */
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var_filename,
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/* ZeroableInteger. *VAR is an int. Like Unsigned Integer except
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that zero really means zero. */
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var_zinteger,
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/* Enumerated type. Can only have one of the specified values. *VAR is a
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char pointer to the name of the element that we find. */
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var_enum
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}
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var_types;
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/* This structure records one command'd definition. */
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struct cmd_list_element
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{
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/* Points to next command in this list. */
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struct cmd_list_element *next;
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/* Name of this command. */
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char *name;
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/* Command class; class values are chosen by application program. */
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enum command_class class;
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/* Function definition of this command.
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NO_FUNCTION for command class names and for help topics that
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are not really commands. */
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union
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{
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/* If type is not_set_cmd, call it like this: */
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void (*cfunc) PARAMS ((char *args, int from_tty));
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/* If type is cmd_set or show_cmd, first set the variables, and
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then call this. */
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void (*sfunc) PARAMS ((char *args, int from_tty,
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struct cmd_list_element * c));
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}
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function;
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#define NO_FUNCTION ((void (*) PARAMS((char *args, int from_tty))) 0)
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/* Documentation of this command (or help topic).
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First line is brief documentation; remaining lines form, with it,
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the full documentation. First line should end with a period.
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Entire string should also end with a period, not a newline. */
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char *doc;
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/* Hook for another command to be executed before this command. */
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struct cmd_list_element *hook;
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/* Nonzero identifies a prefix command. For them, the address
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of the variable containing the list of subcommands. */
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struct cmd_list_element **prefixlist;
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/* For prefix commands only:
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String containing prefix commands to get here: this one
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plus any others needed to get to it. Should end in a space.
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It is used before the word "command" in describing the
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commands reached through this prefix. */
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char *prefixname;
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/* For prefix commands only:
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nonzero means do not get an error if subcommand is not
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recognized; call the prefix's own function in that case. */
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char allow_unknown;
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/* Nonzero says this is an abbreviation, and should not
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be mentioned in lists of commands.
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This allows "br<tab>" to complete to "break", which it
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otherwise wouldn't. */
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char abbrev_flag;
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/* Completion routine for this command. TEXT is the text beyond
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what was matched for the command itself (leading whitespace is
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skipped). It stops where we are supposed to stop completing
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(rl_point) and is '\0' terminated.
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Return value is a malloc'd vector of pointers to possible completions
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terminated with NULL. If there are no completions, returning a pointer
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to a NULL would work but returning NULL itself is also valid.
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WORD points in the same buffer as TEXT, and completions should be
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returned relative to this position. For example, suppose TEXT is "foo"
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and we want to complete to "foobar". If WORD is "oo", return
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"oobar"; if WORD is "baz/foo", return "baz/foobar". */
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char **(*completer) PARAMS ((char *text, char *word));
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/* Type of "set" or "show" command (or SET_NOT_SET if not "set"
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or "show"). */
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cmd_types type;
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/* Pointer to variable affected by "set" and "show". Doesn't matter
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if type is not_set. */
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char *var;
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/* What kind of variable is *VAR? */
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var_types var_type;
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/* Pointer to NULL terminated list of enumerated values (like argv). */
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char **enums;
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/* Pointer to command strings of user-defined commands */
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struct command_line *user_commands;
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/* Pointer to command that is hooked by this one,
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so the hook can be removed when this one is deleted. */
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struct cmd_list_element *hookee;
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/* Pointer to command that is aliased by this one, so the
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aliased command can be located in case it has been hooked. */
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struct cmd_list_element *cmd_pointer;
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};
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/* Forward-declarations of the entry-points of command.c. */
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extern struct cmd_list_element *
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add_cmd PARAMS ((char *, enum command_class, void (*fun) (char *, int),
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char *, struct cmd_list_element **));
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extern struct cmd_list_element *
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add_alias_cmd PARAMS ((char *, char *, enum command_class, int,
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struct cmd_list_element **));
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extern struct cmd_list_element *
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add_prefix_cmd PARAMS ((char *, enum command_class, void (*fun) (char *, int),
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char *, struct cmd_list_element **, char *, int,
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struct cmd_list_element **));
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extern struct cmd_list_element *
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add_abbrev_prefix_cmd PARAMS ((char *, enum command_class,
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void (*fun) (char *, int), char *,
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struct cmd_list_element **, char *, int,
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struct cmd_list_element **));
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extern struct cmd_list_element *
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lookup_cmd PARAMS ((char **, struct cmd_list_element *, char *, int, int));
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extern struct cmd_list_element *
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lookup_cmd_1 PARAMS ((char **, struct cmd_list_element *,
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struct cmd_list_element **, int));
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extern void
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add_com PARAMS ((char *, enum command_class, void (*fun) (char *, int),
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char *));
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extern void
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add_com_alias PARAMS ((char *, char *, enum command_class, int));
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extern void
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add_info PARAMS ((char *, void (*fun) (char *, int), char *));
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extern void
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add_info_alias PARAMS ((char *, char *, int));
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extern char **
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complete_on_cmdlist PARAMS ((struct cmd_list_element *, char *, char *));
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extern char **
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complete_on_enum PARAMS ((char **enumlist, char *, char *));
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extern void
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delete_cmd PARAMS ((char *, struct cmd_list_element **));
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extern void help_cmd (char *, struct ui_file *);
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extern void help_list (struct cmd_list_element *, char *,
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enum command_class, struct ui_file *);
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extern void help_cmd_list (struct cmd_list_element *, enum command_class,
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char *, int, struct ui_file *);
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extern struct cmd_list_element *
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add_set_cmd PARAMS ((char *, enum command_class, var_types, char *, char *,
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struct cmd_list_element **));
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extern struct cmd_list_element *
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add_set_enum_cmd PARAMS ((char *name, enum command_class, char *list[],
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char *var, char *doc, struct cmd_list_element ** c));
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extern struct cmd_list_element *
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add_show_from_set PARAMS ((struct cmd_list_element *,
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struct cmd_list_element **));
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/* Do a "set" or "show" command. ARG is NULL if no argument, or the text
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of the argument, and FROM_TTY is nonzero if this command is being entered
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directly by the user (i.e. these are just like any other
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command). C is the command list element for the command. */
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extern void
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do_setshow_command PARAMS ((char *, int, struct cmd_list_element *));
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/* Do a "show" command for each thing on a command list. */
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extern void
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cmd_show_list PARAMS ((struct cmd_list_element *, int, char *));
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extern void
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error_no_arg PARAMS ((char *));
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extern void
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dont_repeat PARAMS ((void));
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/* Used to mark commands that don't do anything. If we just leave the
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function field NULL, the command is interpreted as a help topic, or
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as a class of commands. */
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extern void
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not_just_help_class_command PARAMS ((char *, int));
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#endif /* !defined (COMMAND_H) */
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