gdb/command.h

   1 /* Header file for command-reading library command.c.
   2
   3    Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000,
   4    2002, 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
   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
   8    the Free Software Foundation; either version 3 of the License, or
   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
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #if !defined (COMMAND_H)
  20 #define COMMAND_H 1
  21
  22 /* Command classes are top-level categories into which commands are broken
  23    down for "help" purposes.
  24    Notes on classes: class_alias is for alias commands which are not
  25    abbreviations of the original command.  class-pseudo is for
  26    commands which are not really commands nor help topics ("stop").  */
  27
  28 enum command_class
  29 {
  30   /* Special args to help_list */
  31   class_deprecated = -3, all_classes = -2, all_commands = -1,
  32   /* Classes of commands */
  33   no_class = -1, class_run = 0, class_vars, class_stack,
  34   class_files, class_support, class_info, class_breakpoint, class_trace,
  35   class_alias, class_obscure, class_user, class_maintenance,
  36   class_pseudo, class_tui, class_xdb
  37 };
  38
  39 /* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum
  40    cmd_types'' can be moved from "command.h" to "cli-decode.h".  */
  41 /* Not a set/show command.  Note that some commands which begin with
  42    "set" or "show" might be in this category, if their syntax does
  43    not fall into one of the following categories.  */
  44 typedef enum cmd_types
  45   {
  46     not_set_cmd,
  47     set_cmd,
  48     show_cmd
  49   }
  50 cmd_types;
  51
  52 /* Types of "set" or "show" command.  */
  53 typedef enum var_types
  54   {
  55     /* "on" or "off".  *VAR is an integer which is nonzero for on,
  56        zero for off.  */
  57     var_boolean,
  58
  59     /* "on" / "true" / "enable" or "off" / "false" / "disable" or
  60        "auto.  *VAR is an ``enum auto_boolean''.  NOTE: In general a
  61        custom show command will need to be implemented - one that for
  62        "auto" prints both the "auto" and the current auto-selected
  63        value. */
  64     var_auto_boolean,
  65
  66     /* Unsigned Integer.  *VAR is an unsigned int.  The user can type 0
  67        to mean "unlimited", which is stored in *VAR as UINT_MAX.  */
  68     var_uinteger,
  69
  70     /* Like var_uinteger but signed.  *VAR is an int.  The user can type 0
  71        to mean "unlimited", which is stored in *VAR as INT_MAX.  */
  72     var_integer,
  73
  74     /* String which the user enters with escapes (e.g. the user types \n and
  75        it is a real newline in the stored string).
  76        *VAR is a malloc'd string, or NULL if the string is empty.  */
  77     var_string,
  78     /* String which stores what the user types verbatim.
  79        *VAR is a malloc'd string, or NULL if the string is empty.  */
  80     var_string_noescape,
  81     /* String which stores a filename.  (*VAR) is a malloc'd string,
  82        or "" if the string was empty.  */
  83     var_optional_filename,
  84     /* String which stores a filename.  (*VAR) is a malloc'd
  85        string.  */
  86     var_filename,
  87     /* ZeroableInteger.  *VAR is an int.  Like Unsigned Integer except
  88        that zero really means zero.  */
  89     var_zinteger,
  90     /* ZeroableUnsignedInteger.  *VAR is an unsigned int.  Zero really
  91        means zero.  */
  92     var_zuinteger,
  93     /* Enumerated type.  Can only have one of the specified values.  *VAR is a
  94        char pointer to the name of the element that we find.  */
  95     var_enum
  96   }
  97 var_types;
  98
  99 /* This structure records one command'd definition.  */
 100 struct cmd_list_element;
 101
 102 /* Forward-declarations of the entry-points of cli/cli-decode.c.  */
 103
 104 extern struct cmd_list_element *add_cmd (char *, enum command_class,
 105                                          void (*fun) (char *, int), char *,
 106                                          struct cmd_list_element **);
 107
 108 extern struct cmd_list_element *add_alias_cmd (char *, char *,
 109                                                enum command_class, int,
 110                                                struct cmd_list_element **);
 111
 112 extern struct cmd_list_element *add_prefix_cmd (char *, enum command_class,
 113                                                 void (*fun) (char *, int),
 114                                                 char *,
 115                                                 struct cmd_list_element **,
 116                                                 char *, int,
 117                                                 struct cmd_list_element **);
 118
 119 extern struct cmd_list_element *add_abbrev_prefix_cmd (char *,
 120                                                        enum command_class,
 121                                                        void (*fun) (char *,
 122                                                                     int),
 123                                                        char *,
 124                                                        struct cmd_list_element
 125                                                        **, char *, int,
 126                                                        struct cmd_list_element
 127                                                        **);
 128
 129 /* Set the commands corresponding callback.  */
 130
 131 typedef void cmd_cfunc_ftype (char *args, int from_tty);
 132 extern void set_cmd_cfunc (struct cmd_list_element *cmd,
 133                            cmd_cfunc_ftype *cfunc);
 134
 135 typedef void cmd_sfunc_ftype (char *args, int from_tty,
 136                               struct cmd_list_element *c);
 137 extern void set_cmd_sfunc (struct cmd_list_element *cmd,
 138                            cmd_sfunc_ftype *sfunc);
 139
 140 extern void set_cmd_completer (struct cmd_list_element *cmd,
 141                                char **(*completer) (struct cmd_list_element *cmd,
 142                                                     char *text, char *word));
 143
 144 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
 145    around in cmd objects to test the value of the commands sfunc().  */
 146 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
 147                          void (*cfunc) (char *args, int from_tty));
 148
 149 /* Each command object has a local context attached to it. .  */
 150 extern void set_cmd_context (struct cmd_list_element *cmd, void *context);
 151 extern void *get_cmd_context (struct cmd_list_element *cmd);
 152
 153
 154 /* Execute CMD's pre/post hook.  Throw an error if the command fails.
 155    If already executing this pre/post hook, or there is no pre/post
 156    hook, the call is silently ignored.  */
 157 extern void execute_cmd_pre_hook (struct cmd_list_element *cmd);
 158 extern void execute_cmd_post_hook (struct cmd_list_element *cmd);
 159
 160 /* Return the type of the command.  */
 161 extern enum cmd_types cmd_type (struct cmd_list_element *cmd);
 162
 163
 164 extern struct cmd_list_element *lookup_cmd (char **,
 165                                             struct cmd_list_element *, char *,
 166                                             int, int);
 167
 168 extern struct cmd_list_element *lookup_cmd_1 (char **,
 169                                               struct cmd_list_element *,
 170                                               struct cmd_list_element **,
 171                                               int);
 172
 173 extern struct cmd_list_element *
 174   deprecate_cmd (struct cmd_list_element *, char * );
 175
 176 extern void
 177   deprecated_cmd_warning (char **);
 178
 179 extern int
 180   lookup_cmd_composition (char *text,
 181                         struct cmd_list_element **alias,
 182                         struct cmd_list_element **prefix_cmd,
 183                         struct cmd_list_element **cmd);
 184
 185 extern struct cmd_list_element *add_com (char *, enum command_class,
 186                                          void (*fun) (char *, int), char *);
 187
 188 extern struct cmd_list_element *add_com_alias (char *, char *,
 189                                                enum command_class, int);
 190
 191 extern struct cmd_list_element *add_info (char *, void (*fun) (char *, int),
 192                                           char *);
 193
 194 extern struct cmd_list_element *add_info_alias (char *, char *, int);
 195
 196 extern char **complete_on_cmdlist (struct cmd_list_element *, char *, char *);
 197
 198 extern char **complete_on_enum (const char *enumlist[], char *, char *);
 199
 200 extern void help_cmd (char *, struct ui_file *);
 201
 202 extern void help_list (struct cmd_list_element *, char *,
 203                        enum command_class, struct ui_file *);
 204
 205 extern void help_cmd_list (struct cmd_list_element *, enum command_class,
 206                            char *, int, struct ui_file *);
 207
 208 /* NOTE: cagney/2005-02-21: Since every set command should be paired
 209    with a corresponding show command (i.e., add_setshow_*) this call
 210    should not be needed.  Unfortunatly some are not (e.g.,
 211    "maintenance <variable> <value>") and those need to be fixed.  */
 212 extern struct cmd_list_element *deprecated_add_set_cmd (char *name, enum
 213                                                         command_class class,
 214                                                         var_types var_type, void *var,
 215                                                         char *doc,
 216                                                         struct cmd_list_element **list);
 217
 218 /* Method for show a set/show variable's VALUE on FILE.  If this
 219    method isn't supplied deprecated_show_value_hack() is called (which
 220    is not good).  */
 221 typedef void (show_value_ftype) (struct ui_file *file,
 222                                  int from_tty,
 223                                  struct cmd_list_element *cmd,
 224                                  const char *value);
 225 /* NOTE: i18n: This function is not i18n friendly.  Callers should
 226    instead print the value out directly.  */
 227 extern show_value_ftype deprecated_show_value_hack;
 228
 229 extern void add_setshow_enum_cmd (char *name,
 230                                   enum command_class class,
 231                                   const char *enumlist[],
 232                                   const char **var,
 233                                   const char *set_doc,
 234                                   const char *show_doc,
 235                                   const char *help_doc,
 236                                   cmd_sfunc_ftype *set_func,
 237                                   show_value_ftype *show_func,
 238                                   struct cmd_list_element **set_list,
 239                                   struct cmd_list_element **show_list);
 240
 241 extern void add_setshow_auto_boolean_cmd (char *name,
 242                                           enum command_class class,
 243                                           enum auto_boolean *var,
 244                                           const char *set_doc,
 245                                           const char *show_doc,
 246                                           const char *help_doc,
 247                                           cmd_sfunc_ftype *set_func,
 248                                           show_value_ftype *show_func,
 249                                           struct cmd_list_element **set_list,
 250                                           struct cmd_list_element **show_list);
 251
 252 extern void add_setshow_boolean_cmd (char *name,
 253                                      enum command_class class,
 254                                      int *var,
 255                                      const char *set_doc, const char *show_doc,
 256                                      const char *help_doc,
 257                                      cmd_sfunc_ftype *set_func,
 258                                      show_value_ftype *show_func,
 259                                      struct cmd_list_element **set_list,
 260                                      struct cmd_list_element **show_list);
 261
 262 extern void add_setshow_filename_cmd (char *name,
 263                                       enum command_class class,
 264                                       char **var,
 265                                       const char *set_doc,
 266                                       const char *show_doc,
 267                                       const char *help_doc,
 268                                       cmd_sfunc_ftype *set_func,
 269                                       show_value_ftype *show_func,
 270                                       struct cmd_list_element **set_list,
 271                                       struct cmd_list_element **show_list);
 272
 273 extern void add_setshow_string_cmd (char *name,
 274                                     enum command_class class,
 275                                     char **var,
 276                                     const char *set_doc,
 277                                     const char *show_doc,
 278                                     const char *help_doc,
 279                                     cmd_sfunc_ftype *set_func,
 280                                     show_value_ftype *show_func,
 281                                     struct cmd_list_element **set_list,
 282                                     struct cmd_list_element **show_list);
 283
 284 extern void add_setshow_string_noescape_cmd (char *name,
 285                                              enum command_class class,
 286                                              char **var,
 287                                              const char *set_doc,
 288                                              const char *show_doc,
 289                                              const char *help_doc,
 290                                              cmd_sfunc_ftype *set_func,
 291                                              show_value_ftype *show_func,
 292                                              struct cmd_list_element **set_list,
 293                                              struct cmd_list_element **show_list);
 294
 295 extern void add_setshow_optional_filename_cmd (char *name,
 296                                                enum command_class class,
 297                                                char **var,
 298                                                const char *set_doc,
 299                                                const char *show_doc,
 300                                                const char *help_doc,
 301                                                cmd_sfunc_ftype *set_func,
 302                                                show_value_ftype *show_func,
 303                                                struct cmd_list_element **set_list,
 304                                                struct cmd_list_element **show_list);
 305
 306 extern void add_setshow_integer_cmd (char *name,
 307                                      enum command_class class,
 308                                      int *var,
 309                                      const char *set_doc,
 310                                      const char *show_doc,
 311                                      const char *help_doc,
 312                                      cmd_sfunc_ftype *set_func,
 313                                      show_value_ftype *show_func,
 314                                      struct cmd_list_element **set_list,
 315                                      struct cmd_list_element **show_list);
 316
 317 extern void add_setshow_uinteger_cmd (char *name,
 318                                       enum command_class class,
 319                                       unsigned int *var,
 320                                       const char *set_doc,
 321                                       const char *show_doc,
 322                                       const char *help_doc,
 323                                       cmd_sfunc_ftype *set_func,
 324                                       show_value_ftype *show_func,
 325                                       struct cmd_list_element **set_list,
 326                                       struct cmd_list_element **show_list);
 327
 328 extern void add_setshow_zinteger_cmd (char *name,
 329                                       enum command_class class,
 330                                       int *var,
 331                                       const char *set_doc,
 332                                       const char *show_doc,
 333                                       const char *help_doc,
 334                                       cmd_sfunc_ftype *set_func,
 335                                       show_value_ftype *show_func,
 336                                       struct cmd_list_element **set_list,
 337                                       struct cmd_list_element **show_list);
 338
 339 extern void add_setshow_zuinteger_cmd (char *name,
 340                                        enum command_class class,
 341                                        unsigned int *var,
 342                                        const char *set_doc,
 343                                        const char *show_doc,
 344                                        const char *help_doc,
 345                                        cmd_sfunc_ftype *set_func,
 346                                        show_value_ftype *show_func,
 347                                        struct cmd_list_element **set_list,
 348                                        struct cmd_list_element **show_list);
 349
 350 /* Do a "show" command for each thing on a command list.  */
 351
 352 extern void cmd_show_list (struct cmd_list_element *, int, char *);
 353
 354 extern NORETURN void error_no_arg (char *) ATTR_NORETURN;
 355
 356 extern void dont_repeat (void);
 357
 358 /* Used to mark commands that don't do anything.  If we just leave the
 359    function field NULL, the command is interpreted as a help topic, or
 360    as a class of commands.  */
 361
 362 extern void not_just_help_class_command (char *, int);
 363
 364 /* check function pointer */
 365 extern int cmd_func_p (struct cmd_list_element *cmd);
 366
 367 /* call the command function */
 368 extern void cmd_func (struct cmd_list_element *cmd, char *args, int from_tty);
 369
 370 #endif /* !defined (COMMAND_H) */