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

/* Header file for GDB command decoding library.

   Copyright (c) 2000, 2003 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 2 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, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.  */

#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 it's 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) (char *text, char *word);

    /* 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;
  };

/* 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) (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 delete_cmd (char *, struct cmd_list_element **);

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
10f9c213	3	Copyright (c) 2000, 2003 Free Software Foundation, Inc.
d318976c FN	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the Free Software
10f9c213 EZ	17	Foundation, Inc., 51 Franklin Street, Fifth Floor,
10f9c213 EZ	18	Boston, MA 02110-1301, USA. */
d318976c FN	19
	20	#if !defined (CLI_DECODE_H)
	21	#define CLI_DECODE_H 1
	22
18a642a1	23	#include "command.h"
d318976c	24
8fe84d01 MK	25	struct re_pattern_buffer;
8fe84d01 MK	26
18a642a1 AC	27	#if 0
	28	/* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum
	29	cmd_types'' can be moved from "command.h" to "cli-decode.h". */
d318976c FN	30	/* Not a set/show command. Note that some commands which begin with
	31	"set" or "show" might be in this category, if their syntax does
	32	not fall into one of the following categories. */
	33	typedef enum cmd_types
	34	{
	35	not_set_cmd,
	36	set_cmd,
	37	show_cmd
	38	}
	39	cmd_types;
18a642a1	40	#endif
d318976c FN	41
	42	/* This structure records one command'd definition. */
	43
	44
	45	/* This flag is used by the code executing commands to warn the user
	46	the first time a deprecated command is used, see the 'flags' field in
	47	the following struct.
	48	*/
	49	#define CMD_DEPRECATED 0x1
	50	#define DEPRECATED_WARN_USER 0x2
	51	#define MALLOCED_REPLACEMENT 0x4
	52
	53	struct cmd_list_element
	54	{
	55	/* Points to next command in this list. */
	56	struct cmd_list_element *next;
	57
	58	/* Name of this command. */
	59	char *name;
	60
	61	/* Command class; class values are chosen by application program. */
	62	enum command_class class;
	63
e00d1dc8	64	/* Function definition of this command. NULL for command class
9f60d481 AC	65	names and for help topics that are not really commands. NOTE:
	66	cagney/2002-02-02: This function signature is evolving. For
	67	the moment suggest sticking with either set_cmd_cfunc() or
	68	set_cmd_sfunc(). */
	69	void (func) (struct cmd_list_element c, char *args, int from_tty);
	70	/* The command's real callback. At present func() bounces through
	71	to one of the below. */
d318976c FN	72	union
d318976c FN	73	{
9773a94b AC	74	/* If type is not_set_cmd, call it like this: */
	75	cmd_cfunc_ftype *cfunc;
	76	/* If type is set_cmd or show_cmd, first set the variables,
	77	and then call this: */
	78	cmd_sfunc_ftype *sfunc;
d318976c FN	79	}
d318976c FN	80	function;
d318976c	81
7d0766f3 AC	82	/* Local state (context) for this command. This can be anything. */
	83	void *context;
	84
d318976c FN	85	/* Documentation of this command (or help topic).
	86	First line is brief documentation; remaining lines form, with it,
	87	the full documentation. First line should end with a period.
	88	Entire string should also end with a period, not a newline. */
	89	char *doc;
	90
335cca0d AC	91	/* For set/show commands. A method for printing the output to the
335cca0d AC	92	specified stream. */
08546159	93	show_value_ftype *show_value_func;
335cca0d	94
d318976c FN	95	/* flags : a bitfield
	96
	97	bit 0: (LSB) CMD_DEPRECATED, when 1 indicated that this command
	98	is deprecated. It may be removed from gdb's command set in the
	99	future.
	100
	101	bit 1: DEPRECATED_WARN_USER, the user needs to be warned that
	102	this is a deprecated command. The user should only be warned
	103	the first time a command is used.
	104
	105	bit 2: MALLOCED_REPLACEMENT, when functions are deprecated at
	106	compile time (this is the way it should, in general, be done)
	107	the memory containing the replacement string is statically
	108	allocated. In some cases it makes sense to deprecate commands
	109	at runtime (the testsuite is one example). In this case the
	110	memory for replacement is malloc'ed. When a command is
	111	undeprecated or re-deprecated at runtime we don't want to risk
	112	calling free on statically allocated memory, so we check this
	113	flag.
	114	*/
	115	int flags;
	116
4e18e2de	117	/* If this command is deprecated, this is the replacement name. */
d318976c FN	118	char *replacement;
d318976c FN	119
552c04a7 TT	120	/* If this command represents a show command, then this function
	121	is called before the variable's value is examined. */
	122	void (pre_show_hook) (struct cmd_list_element c);
	123
d318976c FN	124	/* Hook for another command to be executed before this command. */
	125	struct cmd_list_element *hook_pre;
	126
	127	/* Hook for another command to be executed after this command. */
	128	struct cmd_list_element *hook_post;
	129
4e18e2de MS	130	/* Flag that specifies if this command is already running it's hook. */
4e18e2de MS	131	/* Prevents the possibility of hook recursion. */
d318976c FN	132	int hook_in;
	133
	134	/* Nonzero identifies a prefix command. For them, the address
	135	of the variable containing the list of subcommands. */
	136	struct cmd_list_element **prefixlist;
	137
	138	/* For prefix commands only:
	139	String containing prefix commands to get here: this one
	140	plus any others needed to get to it. Should end in a space.
	141	It is used before the word "command" in describing the
	142	commands reached through this prefix. */
	143	char *prefixname;
	144
	145	/* For prefix commands only:
	146	nonzero means do not get an error if subcommand is not
	147	recognized; call the prefix's own function in that case. */
	148	char allow_unknown;
	149
	150	/* Nonzero says this is an abbreviation, and should not
	151	be mentioned in lists of commands.
	152	This allows "br<tab>" to complete to "break", which it
	153	otherwise wouldn't. */
	154	char abbrev_flag;
	155
	156	/* Completion routine for this command. TEXT is the text beyond
	157	what was matched for the command itself (leading whitespace is
	158	skipped). It stops where we are supposed to stop completing
	159	(rl_point) and is '\0' terminated.
	160
	161	Return value is a malloc'd vector of pointers to possible completions
	162	terminated with NULL. If there are no completions, returning a pointer
	163	to a NULL would work but returning NULL itself is also valid.
	164	WORD points in the same buffer as TEXT, and completions should be
	165	returned relative to this position. For example, suppose TEXT is "foo"
	166	and we want to complete to "foobar". If WORD is "oo", return
	167	"oobar"; if WORD is "baz/foo", return "baz/foobar". */
	168	char *(completer) (char text, char word);
	169
	170	/* Type of "set" or "show" command (or SET_NOT_SET if not "set"
	171	or "show"). */
	172	cmd_types type;
	173
	174	/* Pointer to variable affected by "set" and "show". Doesn't matter
	175	if type is not_set. */
	176	void *var;
	177
	178	/* What kind of variable is VAR? /
	179	var_types var_type;
	180
	181	/* Pointer to NULL terminated list of enumerated values (like argv). */
	182	const char **enums;
	183
	184	/* Pointer to command strings of user-defined commands */
	185	struct command_line *user_commands;
	186
	187	/* Pointer to command that is hooked by this one, (by hook_pre)
	188	so the hook can be removed when this one is deleted. */
	189	struct cmd_list_element *hookee_pre;
	190
	191	/* Pointer to command that is hooked by this one, (by hook_post)
	192	so the hook can be removed when this one is deleted. */
	193	struct cmd_list_element *hookee_post;
	194
	195	/* Pointer to command that is aliased by this one, so the
196	aliased command can be located in case it has been hooked. */
197	struct cmd_list_element *cmd_pointer;
198	};
199
200	/* API to the manipulation of command lists. */
201
202	extern struct cmd_list_element add_cmd (char , enum command_class,
203	void (fun) (char , int), char *,
204	struct cmd_list_element **);
205
206	extern struct cmd_list_element add_alias_cmd (char , char *,
207	enum command_class, int,
208	struct cmd_list_element **);
209
210	extern struct cmd_list_element add_prefix_cmd (char , enum command_class,
211	void (fun) (char , int),
212	char *,
213	struct cmd_list_element **,
214	char *, int,
215	struct cmd_list_element **);
216
217	extern struct cmd_list_element add_abbrev_prefix_cmd (char ,
218	enum command_class,
219	void (fun) (char ,
220	int),
221	char *,
222	struct cmd_list_element
223	*, char , int,
224	struct cmd_list_element
225	**);
226
9f60d481 AC	227	/* Set the commands corresponding callback. */
	228
	229	extern void set_cmd_cfunc (struct cmd_list_element *cmd,
	230	void (cfunc) (char args, int from_tty));
	231
	232	extern void set_cmd_sfunc (struct cmd_list_element *cmd,
	233	void (sfunc) (char args, int from_tty,
	234	struct cmd_list_element * c));
	235
5ba2abeb AC	236	extern void set_cmd_completer (struct cmd_list_element *cmd,
	237	char *(completer) (char text, char word));
	238
bbaca940 AC	239	/* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
	240	around in cmd objects to test the value of the commands sfunc(). */
	241	extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
	242	void (cfunc) (char args, int from_tty));
9f60d481	243
7d0766f3 AC	244	/* Access to the command's local context. */
	245	extern void set_cmd_context (struct cmd_list_element cmd, void context);
	246	extern void get_cmd_context (struct cmd_list_element cmd);
	247
d318976c FN	248	extern struct cmd_list_element lookup_cmd (char *,
	249	struct cmd_list_element , char ,
	250	int, int);
	251
	252	extern struct cmd_list_element lookup_cmd_1 (char *,
	253	struct cmd_list_element *,
	254	struct cmd_list_element **,
	255	int);
	256
	257	extern struct cmd_list_element *
	258	deprecate_cmd (struct cmd_list_element , char );
	259
	260	extern void
	261	deprecated_cmd_warning (char **);
	262
	263	extern int
	264	lookup_cmd_composition (char *text,
	265	struct cmd_list_element **alias,
	266	struct cmd_list_element **prefix_cmd,
	267	struct cmd_list_element **cmd);
	268
	269	extern struct cmd_list_element add_com (char , enum command_class,
	270	void (fun) (char , int), char *);
	271
	272	extern struct cmd_list_element add_com_alias (char , char *,
	273	enum command_class, int);
	274
	275	extern struct cmd_list_element add_info (char , void (fun) (char , int),
	276	char *);
	277
	278	extern struct cmd_list_element add_info_alias (char , char *, int);
	279
	280	extern char *complete_on_cmdlist (struct cmd_list_element , char , char );
	281
	282	extern char *complete_on_enum (const char enumlist[], char , char );
	283
	284	extern void delete_cmd (char , struct cmd_list_element *);
	285
	286	extern void help_cmd_list (struct cmd_list_element *, enum command_class,
	287	char , int, struct ui_file );
	288
d318976c FN	289	/* Functions that implement commands about CLI commands. */
	290
	291	extern void help_cmd (char , struct ui_file );
	292
	293	extern void help_list (struct cmd_list_element , char ,
	294	enum command_class, struct ui_file *);
	295
	296	extern void apropos_cmd (struct ui_file , struct cmd_list_element ,
	297	struct re_pattern_buffer , char );
	298
	299	/* Used to mark commands that don't do anything. If we just leave the
	300	function field NULL, the command is interpreted as a help topic, or
	301	as a class of commands. */
	302
	303	extern void not_just_help_class_command (char *arg, int from_tty);
	304
	305	/* Exported to cli/cli-setshow.c */
	306
	307	extern void print_doc_line (struct ui_file , char );
	308
	309
	310	#endif /* !defined (CLI_DECODE_H) */