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/* Header file for GDB command decoding library.
Copyright (c) 2000-2013 Free Software Foundation, Inc.
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (CLI_DECODE_H)
#define CLI_DECODE_H 1
/* This file defines the private interfaces for any code implementing
command internals. */
/* Include the public interfaces. */
#include "command.h"
struct re_pattern_buffer;
#if 0
/* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum
cmd_types'' can be moved from "command.h" to "cli-decode.h". */
/* Not a set/show command. Note that some commands which begin with
"set" or "show" might be in this category, if their syntax does
not fall into one of the following categories. */
typedef enum cmd_types
{
not_set_cmd,
set_cmd,
show_cmd
}
cmd_types;
#endif
/* This structure records one command'd definition. */
/* This flag is used by the code executing commands to warn the user
the first time a deprecated command is used, see the 'flags' field
in the following struct.
*/
#define CMD_DEPRECATED 0x1
#define DEPRECATED_WARN_USER 0x2
#define MALLOCED_REPLACEMENT 0x4
#define DOC_ALLOCATED 0x8
struct cmd_list_element
{
/* Points to next command in this list. */
struct cmd_list_element *next;
/* Name of this command. */
char *name;
/* Command class; class values are chosen by application program. */
enum command_class class;
/* Function definition of this command. NULL for command class
names and for help topics that are not really commands. NOTE:
cagney/2002-02-02: This function signature is evolving. For
the moment suggest sticking with either set_cmd_cfunc() or
set_cmd_sfunc(). */
void (*func) (struct cmd_list_element *c, char *args, int from_tty);
/* The command's real callback. At present func() bounces through
to one of the below. */
union
{
/* If type is not_set_cmd, call it like this: */
cmd_cfunc_ftype *cfunc;
/* If type is set_cmd or show_cmd, first set the variables,
and then call this: */
cmd_sfunc_ftype *sfunc;
}
function;
/* Local state (context) for this command. This can be anything. */
void *context;
/* Documentation of this command (or help topic).
First line is brief documentation; remaining lines form, with it,
the full documentation. First line should end with a period.
Entire string should also end with a period, not a newline. */
char *doc;
/* For set/show commands. A method for printing the output to the
specified stream. */
show_value_ftype *show_value_func;
/* flags : a bitfield
bit 0: (LSB) CMD_DEPRECATED, when 1 indicated that this command
is deprecated. It may be removed from gdb's command set in the
future.
bit 1: DEPRECATED_WARN_USER, the user needs to be warned that
this is a deprecated command. The user should only be warned
the first time a command is used.
bit 2: MALLOCED_REPLACEMENT, when functions are deprecated at
compile time (this is the way it should, in general, be done)
the memory containing the replacement string is statically
allocated. In some cases it makes sense to deprecate commands
at runtime (the testsuite is one example). In this case the
memory for replacement is malloc'ed. When a command is
undeprecated or re-deprecated at runtime we don't want to risk
calling free on statically allocated memory, so we check this
flag.
bit 3: DOC_ALLOCATED, set if the doc field should be xfree'd. */
int flags;
/* If this command is deprecated, this is the replacement name. */
char *replacement;
/* If this command represents a show command, then this function
is called before the variable's value is examined. */
void (*pre_show_hook) (struct cmd_list_element *c);
/* Hook for another command to be executed before this command. */
struct cmd_list_element *hook_pre;
/* Hook for another command to be executed after this command. */
struct cmd_list_element *hook_post;
/* Flag that specifies if this command is already running its hook. */
/* Prevents the possibility of hook recursion. */
int hook_in;
/* Nonzero identifies a prefix command. For them, the address
of the variable containing the list of subcommands. */
struct cmd_list_element **prefixlist;
/* For prefix commands only:
String containing prefix commands to get here: this one
plus any others needed to get to it. Should end in a space.
It is used before the word "command" in describing the
commands reached through this prefix. */
char *prefixname;
/* For prefix commands only:
nonzero means do not get an error if subcommand is not
recognized; call the prefix's own function in that case. */
char allow_unknown;
/* The prefix command of this command. */
struct cmd_list_element *prefix;
/* Nonzero says this is an abbreviation, and should not
be mentioned in lists of commands.
This allows "br<tab>" to complete to "break", which it
otherwise wouldn't. */
char abbrev_flag;
/* Completion routine for this command. TEXT is the text beyond
what was matched for the command itself (leading whitespace is
skipped). It stops where we are supposed to stop completing
(rl_point) and is '\0' terminated.
Return value is a malloc'd vector of pointers to possible
completions terminated with NULL. If there are no completions,
returning a pointer to a NULL would work but returning NULL
itself is also valid. WORD points in the same buffer as TEXT,
and completions should be returned relative to this position.
For example, suppose TEXT is "foo" and we want to complete to
"foobar". If WORD is "oo", return "oobar"; if WORD is
"baz/foo", return "baz/foobar". */
completer_ftype *completer;
/* Destruction routine for this command. If non-NULL, this is
called when this command instance is destroyed. This may be
used to finalize the CONTEXT field, if needed. */
void (*destroyer) (struct cmd_list_element *self, void *context);
/* Type of "set" or "show" command (or SET_NOT_SET if not "set"
or "show"). */
cmd_types type;
/* Pointer to variable affected by "set" and "show". Doesn't
matter if type is not_set. */
void *var;
/* What kind of variable is *VAR? */
var_types var_type;
/* Pointer to NULL terminated list of enumerated values (like
argv). */
const char *const *enums;
/* Pointer to command strings of user-defined commands */
struct command_line *user_commands;
/* Pointer to command that is hooked by this one, (by hook_pre)
so the hook can be removed when this one is deleted. */
struct cmd_list_element *hookee_pre;
/* Pointer to command that is hooked by this one, (by hook_post)
so the hook can be removed when this one is deleted. */
struct cmd_list_element *hookee_post;
/* Pointer to command that is aliased by this one, so the
aliased command can be located in case it has been hooked. */
struct cmd_list_element *cmd_pointer;
/* Start of a linked list of all aliases of this command. */
struct cmd_list_element *aliases;
/* Link pointer for aliases on an alias list. */
struct cmd_list_element *alias_chain;
};
extern void help_cmd_list (struct cmd_list_element *, enum command_class,
char *, int, struct ui_file *);
/* Functions that implement commands about CLI commands. */
extern void help_cmd (char *, struct ui_file *);
extern void apropos_cmd (struct ui_file *, struct cmd_list_element *,
struct re_pattern_buffer *, char *);
/* Used to mark commands that don't do anything. If we just leave the
function field NULL, the command is interpreted as a help topic, or
as a class of commands. */
extern void not_just_help_class_command (char *arg, int from_tty);
/* Exported to cli/cli-setshow.c */
extern void print_doc_line (struct ui_file *, char *);
extern const char * const auto_boolean_enums[];
#endif /* !defined (CLI_DECODE_H) */
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