[deliverable/binutils-gdb.git] / gdb / cli / cli-decode.h

/* Header file for GDB command decoding library.

   Copyright (c) 2000, 2003, 2007, 2008, 2009, 2010
   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

#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

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.  
     */
    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;

    /* 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".  */
    char **(*completer) (struct cmd_list_element *cmd, char *text, char *word);

    /* 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 **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;
  };

/* API to the manipulation of command lists.  */

extern struct cmd_list_element *add_cmd (char *, enum command_class,
					 void (*fun) (char *, int), char *,
					 struct cmd_list_element **);

extern struct cmd_list_element *add_alias_cmd (char *, char *,
					       enum command_class, int,
					       struct cmd_list_element **);

extern struct cmd_list_element *add_prefix_cmd (char *, enum command_class,
						void (*fun) (char *, int),
						char *,
						struct cmd_list_element **,
						char *, int,
						struct cmd_list_element **);

extern struct cmd_list_element *add_abbrev_prefix_cmd (char *,
						       enum command_class,
						       void (*fun) (char *,
								    int),
						       char *,
						       struct cmd_list_element
						       **, char *, int,
						       struct cmd_list_element
						       **);

/* Set the commands corresponding callback.  */

extern void set_cmd_cfunc (struct cmd_list_element *cmd,
			   void (*cfunc) (char *args, int from_tty));

extern void set_cmd_sfunc (struct cmd_list_element *cmd,
			   void (*sfunc) (char *args, int from_tty,
					  struct cmd_list_element * c));

extern void set_cmd_completer (struct cmd_list_element *cmd,
			       char **(*completer) (struct cmd_list_element *self,
						    char *text, char *word));

/* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
   around in cmd objects to test the value of the commands sfunc().  */
extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
			 void (*cfunc) (char *args, int from_tty));

/* Access to the command's local context.  */
extern void set_cmd_context (struct cmd_list_element *cmd, void *context);
extern void *get_cmd_context (struct cmd_list_element *cmd);

extern struct cmd_list_element *lookup_cmd (char **,
					    struct cmd_list_element *, char *,
					    int, int);

extern struct cmd_list_element *lookup_cmd_1 (char **,
					      struct cmd_list_element *,
					      struct cmd_list_element **,
					      int);

extern struct cmd_list_element *
  deprecate_cmd (struct cmd_list_element *, char * );

extern void
  deprecated_cmd_warning (char **);

extern int
  lookup_cmd_composition (char *text,
                        struct cmd_list_element **alias,
                        struct cmd_list_element **prefix_cmd,
                        struct cmd_list_element **cmd);

extern struct cmd_list_element *add_com (char *, enum command_class,
					 void (*fun) (char *, int), char *);

extern struct cmd_list_element *add_com_alias (char *, char *,
					       enum command_class, int);

extern struct cmd_list_element *add_info (char *, void (*fun) (char *, int),
					  char *);

extern struct cmd_list_element *add_info_alias (char *, char *, int);

extern char **complete_on_cmdlist (struct cmd_list_element *, char *, char *);

extern char **complete_on_enum (const char *enumlist[], char *, char *);

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 help_list (struct cmd_list_element *, char *,
		       enum command_class, 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 *);


#endif /* !defined (CLI_DECODE_H) */
Commit	Line	Data
d318976c	1	/* Header file for GDB command decoding library.
1bac305b	2
4c38e0a4 JB	3	Copyright (c) 2000, 2003, 2007, 2008, 2009, 2010
4c38e0a4 JB	4	Free Software Foundation, Inc.
d318976c FN	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
a9762ec7	8	the Free Software Foundation; either version 3 of the License, or
d318976c FN	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
a9762ec7	17	along with this program. If not, see <http://www.gnu.org/licenses/>. */
d318976c FN	18
	19	#if !defined (CLI_DECODE_H)
	20	#define CLI_DECODE_H 1
	21
18a642a1	22	#include "command.h"
d318976c	23
8fe84d01 MK	24	struct re_pattern_buffer;
8fe84d01 MK	25
18a642a1 AC	26	#if 0
	27	/* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum
	28	cmd_types'' can be moved from "command.h" to "cli-decode.h". */
d318976c FN	29	/* Not a set/show command. Note that some commands which begin with
	30	"set" or "show" might be in this category, if their syntax does
	31	not fall into one of the following categories. */
	32	typedef enum cmd_types
	33	{
	34	not_set_cmd,
	35	set_cmd,
	36	show_cmd
	37	}
	38	cmd_types;
18a642a1	39	#endif
d318976c FN	40
	41	/* This structure records one command'd definition. */
	42
	43
	44	/* This flag is used by the code executing commands to warn the user
	45	the first time a deprecated command is used, see the 'flags' field in
	46	the following struct.
	47	*/
	48	#define CMD_DEPRECATED 0x1
	49	#define DEPRECATED_WARN_USER 0x2
	50	#define MALLOCED_REPLACEMENT 0x4
	51
	52	struct cmd_list_element
	53	{
	54	/* Points to next command in this list. */
	55	struct cmd_list_element *next;
	56
	57	/* Name of this command. */
	58	char *name;
	59
	60	/* Command class; class values are chosen by application program. */
	61	enum command_class class;
	62
e00d1dc8	63	/* Function definition of this command. NULL for command class
9f60d481 AC	64	names and for help topics that are not really commands. NOTE:
	65	cagney/2002-02-02: This function signature is evolving. For
	66	the moment suggest sticking with either set_cmd_cfunc() or
	67	set_cmd_sfunc(). */
	68	void (func) (struct cmd_list_element c, char *args, int from_tty);
	69	/* The command's real callback. At present func() bounces through
	70	to one of the below. */
d318976c FN	71	union
d318976c FN	72	{
9773a94b AC	73	/* If type is not_set_cmd, call it like this: */
	74	cmd_cfunc_ftype *cfunc;
	75	/* If type is set_cmd or show_cmd, first set the variables,
	76	and then call this: */
	77	cmd_sfunc_ftype *sfunc;
d318976c FN	78	}
d318976c FN	79	function;
d318976c	80
7d0766f3 AC	81	/* Local state (context) for this command. This can be anything. */
	82	void *context;
	83
d318976c FN	84	/* Documentation of this command (or help topic).
	85	First line is brief documentation; remaining lines form, with it,
	86	the full documentation. First line should end with a period.
	87	Entire string should also end with a period, not a newline. */
	88	char *doc;
	89
335cca0d AC	90	/* For set/show commands. A method for printing the output to the
335cca0d AC	91	specified stream. */
08546159	92	show_value_ftype *show_value_func;
335cca0d	93
d318976c FN	94	/* flags : a bitfield
	95
	96	bit 0: (LSB) CMD_DEPRECATED, when 1 indicated that this command
	97	is deprecated. It may be removed from gdb's command set in the
	98	future.
	99
	100	bit 1: DEPRECATED_WARN_USER, the user needs to be warned that
	101	this is a deprecated command. The user should only be warned
	102	the first time a command is used.
	103
	104	bit 2: MALLOCED_REPLACEMENT, when functions are deprecated at
	105	compile time (this is the way it should, in general, be done)
	106	the memory containing the replacement string is statically
	107	allocated. In some cases it makes sense to deprecate commands
	108	at runtime (the testsuite is one example). In this case the
	109	memory for replacement is malloc'ed. When a command is
	110	undeprecated or re-deprecated at runtime we don't want to risk
	111	calling free on statically allocated memory, so we check this
	112	flag.
	113	*/
	114	int flags;
	115
4e18e2de	116	/* If this command is deprecated, this is the replacement name. */
d318976c FN	117	char *replacement;
d318976c FN	118
552c04a7 TT	119	/* If this command represents a show command, then this function
	120	is called before the variable's value is examined. */
	121	void (pre_show_hook) (struct cmd_list_element c);
	122
d318976c FN	123	/* Hook for another command to be executed before this command. */
	124	struct cmd_list_element *hook_pre;
	125
	126	/* Hook for another command to be executed after this command. */
	127	struct cmd_list_element *hook_post;
	128
0fb0cc75	129	/* Flag that specifies if this command is already running its hook. */
4e18e2de	130	/* Prevents the possibility of hook recursion. */
d318976c FN	131	int hook_in;
	132
	133	/* Nonzero identifies a prefix command. For them, the address
	134	of the variable containing the list of subcommands. */
	135	struct cmd_list_element **prefixlist;
	136
	137	/* For prefix commands only:
	138	String containing prefix commands to get here: this one
	139	plus any others needed to get to it. Should end in a space.
	140	It is used before the word "command" in describing the
	141	commands reached through this prefix. */
	142	char *prefixname;
	143
	144	/* For prefix commands only:
	145	nonzero means do not get an error if subcommand is not
	146	recognized; call the prefix's own function in that case. */
	147	char allow_unknown;
	148
	149	/* Nonzero says this is an abbreviation, and should not
	150	be mentioned in lists of commands.
	151	This allows "br<tab>" to complete to "break", which it
	152	otherwise wouldn't. */
	153	char abbrev_flag;
	154
	155	/* Completion routine for this command. TEXT is the text beyond
	156	what was matched for the command itself (leading whitespace is
	157	skipped). It stops where we are supposed to stop completing
	158	(rl_point) and is '\0' terminated.
	159
	160	Return value is a malloc'd vector of pointers to possible completions
	161	terminated with NULL. If there are no completions, returning a pointer
	162	to a NULL would work but returning NULL itself is also valid.
	163	WORD points in the same buffer as TEXT, and completions should be
	164	returned relative to this position. For example, suppose TEXT is "foo"
	165	and we want to complete to "foobar". If WORD is "oo", return
	166	"oobar"; if WORD is "baz/foo", return "baz/foobar". */
d8906c6f TJB	167	char *(completer) (struct cmd_list_element cmd, char text, char *word);
	168
	169	/* Destruction routine for this command. If non-NULL, this is
	170	called when this command instance is destroyed. This may be
	171	used to finalize the CONTEXT field, if needed. */
	172	void (destroyer) (struct cmd_list_element self, void *context);
d318976c FN	173
	174	/* Type of "set" or "show" command (or SET_NOT_SET if not "set"
	175	or "show"). */
	176	cmd_types type;
	177
	178	/* Pointer to variable affected by "set" and "show". Doesn't matter
	179	if type is not_set. */
	180	void *var;
	181
	182	/* What kind of variable is VAR? /
	183	var_types var_type;
	184
	185	/* Pointer to NULL terminated list of enumerated values (like argv). */
	186	const char **enums;
	187
	188	/* Pointer to command strings of user-defined commands */
	189	struct command_line *user_commands;
	190
	191	/* Pointer to command that is hooked by this one, (by hook_pre)
	192	so the hook can be removed when this one is deleted. */
	193	struct cmd_list_element *hookee_pre;
	194
	195	/* Pointer to command that is hooked by this one, (by hook_post)
	196	so the hook can be removed when this one is deleted. */
	197	struct cmd_list_element *hookee_post;
	198
	199	/* Pointer to command that is aliased by this one, so the
	200	aliased command can be located in case it has been hooked. */
	201	struct cmd_list_element *cmd_pointer;
b05dcbb7 TT	202
	203	/* Start of a linked list of all aliases of this command. */
	204	struct cmd_list_element *aliases;
	205
	206	/* Link pointer for aliases on an alias list. */
	207	struct cmd_list_element *alias_chain;
d318976c FN	208	};
	209
	210	/* API to the manipulation of command lists. */
	211
	212	extern struct cmd_list_element add_cmd (char , enum command_class,
	213	void (fun) (char , int), char *,
	214	struct cmd_list_element **);
	215
	216	extern struct cmd_list_element add_alias_cmd (char , char *,
	217	enum command_class, int,
	218	struct cmd_list_element **);
	219
	220	extern struct cmd_list_element add_prefix_cmd (char , enum command_class,
	221	void (fun) (char , int),
	222	char *,
	223	struct cmd_list_element **,
	224	char *, int,
	225	struct cmd_list_element **);
	226
	227	extern struct cmd_list_element add_abbrev_prefix_cmd (char ,
	228	enum command_class,
	229	void (fun) (char ,
	230	int),
	231	char *,
	232	struct cmd_list_element
	233	*, char , int,
	234	struct cmd_list_element
	235	**);
	236
9f60d481 AC	237	/* Set the commands corresponding callback. */
	238
	239	extern void set_cmd_cfunc (struct cmd_list_element *cmd,
	240	void (cfunc) (char args, int from_tty));
	241
	242	extern void set_cmd_sfunc (struct cmd_list_element *cmd,
	243	void (sfunc) (char args, int from_tty,
	244	struct cmd_list_element * c));
	245
5ba2abeb	246	extern void set_cmd_completer (struct cmd_list_element *cmd,
d8906c6f TJB	247	char *(completer) (struct cmd_list_element *self,
d8906c6f TJB	248	char text, char word));
5ba2abeb	249
bbaca940 AC	250	/* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
	251	around in cmd objects to test the value of the commands sfunc(). */
	252	extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
	253	void (cfunc) (char args, int from_tty));
9f60d481	254
7d0766f3 AC	255	/* Access to the command's local context. */
	256	extern void set_cmd_context (struct cmd_list_element cmd, void context);
	257	extern void get_cmd_context (struct cmd_list_element cmd);
	258
d318976c FN	259	extern struct cmd_list_element lookup_cmd (char *,
	260	struct cmd_list_element , char ,
	261	int, int);
	262
	263	extern struct cmd_list_element lookup_cmd_1 (char *,
	264	struct cmd_list_element *,
	265	struct cmd_list_element **,
	266	int);
	267
	268	extern struct cmd_list_element *
	269	deprecate_cmd (struct cmd_list_element , char );
	270
	271	extern void
	272	deprecated_cmd_warning (char **);
	273
	274	extern int
	275	lookup_cmd_composition (char *text,
	276	struct cmd_list_element **alias,
	277	struct cmd_list_element **prefix_cmd,
	278	struct cmd_list_element **cmd);
	279
	280	extern struct cmd_list_element add_com (char , enum command_class,
	281	void (fun) (char , int), char *);
	282
	283	extern struct cmd_list_element add_com_alias (char , char *,
	284	enum command_class, int);
	285
	286	extern struct cmd_list_element add_info (char , void (fun) (char , int),
	287	char *);
	288
	289	extern struct cmd_list_element add_info_alias (char , char *, int);
	290
	291	extern char *complete_on_cmdlist (struct cmd_list_element , char , char );
	292
	293	extern char *complete_on_enum (const char enumlist[], char , char );
	294
d318976c FN	295	extern void help_cmd_list (struct cmd_list_element *, enum command_class,
	296	char , int, struct ui_file );
	297
d318976c FN	298	/* Functions that implement commands about CLI commands. */
	299
	300	extern void help_cmd (char , struct ui_file );
	301
	302	extern void help_list (struct cmd_list_element , char ,
	303	enum command_class, struct ui_file *);
	304
	305	extern void apropos_cmd (struct ui_file , struct cmd_list_element ,
	306	struct re_pattern_buffer , char );
	307
	308	/* Used to mark commands that don't do anything. If we just leave the
	309	function field NULL, the command is interpreted as a help topic, or
	310	as a class of commands. */
	311
	312	extern void not_just_help_class_command (char *arg, int from_tty);
	313
	314	/* Exported to cli/cli-setshow.c */
	315
	316	extern void print_doc_line (struct ui_file , char );
	317
	318
	319	#endif /* !defined (CLI_DECODE_H) */