gdb/command.h

   1 /* Header file for command-reading library command.c.
   2
   3    Copyright 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1999,
   4    2000, 2002, 2004 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 2 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, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #if !defined (COMMAND_H)
  22 #define COMMAND_H 1
  23
  24 /* Command classes are top-level categories into which commands are broken
  25    down for "help" purposes.
  26    Notes on classes: class_alias is for alias commands which are not
  27    abbreviations of the original command.  class-pseudo is for
  28    commands which are not really commands nor help topics ("stop").  */
  29
  30 enum command_class
  31 {
  32   /* Special args to help_list */
  33   class_deprecated, all_classes = -2, all_commands = -1,
  34   /* Classes of commands */
  35   no_class = -1, class_run = 0, class_vars, class_stack,
  36   class_files, class_support, class_info, class_breakpoint, class_trace,
  37   class_alias, class_obscure, class_user, class_maintenance,
  38   class_pseudo, class_tui, class_xdb
  39 };
  40
  41 /* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum
  42    cmd_types'' can be moved from "command.h" to "cli-decode.h".  */
  43 /* Not a set/show command.  Note that some commands which begin with
  44    "set" or "show" might be in this category, if their syntax does
  45    not fall into one of the following categories.  */
  46 typedef enum cmd_types
  47   {
  48     not_set_cmd,
  49     set_cmd,
  50     show_cmd
  51   }
  52 cmd_types;
  53
  54 /* Types of "set" or "show" command.  */
  55 typedef enum var_types
  56   {
  57     /* "on" or "off".  *VAR is an integer which is nonzero for on,
  58        zero for off.  */
  59     var_boolean,
  60
  61     /* "on" / "true" / "enable" or "off" / "false" / "disable" or
  62        "auto.  *VAR is an ``enum auto_boolean''.  NOTE: In general a
  63        custom show command will need to be implemented - one that for
  64        "auto" prints both the "auto" and the current auto-selected
  65        value. */
  66     var_auto_boolean,
  67
  68     /* Unsigned Integer.  *VAR is an unsigned int.  The user can type 0
  69        to mean "unlimited", which is stored in *VAR as UINT_MAX.  */
  70     var_uinteger,
  71
  72     /* Like var_uinteger but signed.  *VAR is an int.  The user can type 0
  73        to mean "unlimited", which is stored in *VAR as INT_MAX.  */
  74     var_integer,
  75
  76     /* String which the user enters with escapes (e.g. the user types \n and
  77        it is a real newline in the stored string).
  78        *VAR is a malloc'd string, or NULL if the string is empty.  */
  79     var_string,
  80     /* String which stores what the user types verbatim.
  81        *VAR is a malloc'd string, or NULL if the string is empty.  */
  82     var_string_noescape,
  83     /* String which stores a filename.
  84        *VAR is a malloc'd string, or NULL if the string is empty.  */
  85     var_filename,
  86     /* ZeroableInteger.  *VAR is an int.  Like Unsigned Integer except
  87        that zero really means zero.  */
  88     var_zinteger,
  89     /* Enumerated type.  Can only have one of the specified values.  *VAR is a
  90        char pointer to the name of the element that we find.  */
  91     var_enum
  92   }
  93 var_types;
  94
  95 /* This structure records one command'd definition.  */
  96 struct cmd_list_element;
  97
  98 /* Forward-declarations of the entry-points of cli/cli-decode.c.  */
  99
 100 extern struct cmd_list_element *add_cmd (char *, enum command_class,
 101                                          void (*fun) (char *, int), char *,
 102                                          struct cmd_list_element **);
 103
 104 extern struct cmd_list_element *add_alias_cmd (char *, char *,
 105                                                enum command_class, int,
 106                                                struct cmd_list_element **);
 107
 108 extern struct cmd_list_element *add_prefix_cmd (char *, enum command_class,
 109                                                 void (*fun) (char *, int),
 110                                                 char *,
 111                                                 struct cmd_list_element **,
 112                                                 char *, int,
 113                                                 struct cmd_list_element **);
 114
 115 extern struct cmd_list_element *add_abbrev_prefix_cmd (char *,
 116                                                        enum command_class,
 117                                                        void (*fun) (char *,
 118                                                                     int),
 119                                                        char *,
 120                                                        struct cmd_list_element
 121                                                        **, char *, int,
 122                                                        struct cmd_list_element
 123                                                        **);
 124
 125 /* Set the commands corresponding callback.  */
 126
 127 typedef void cmd_cfunc_ftype (char *args, int from_tty);
 128 extern void set_cmd_cfunc (struct cmd_list_element *cmd,
 129                            cmd_cfunc_ftype *cfunc);
 130
 131 typedef void cmd_sfunc_ftype (char *args, int from_tty,
 132                               struct cmd_list_element *c);
 133 extern void set_cmd_sfunc (struct cmd_list_element *cmd,
 134                            cmd_sfunc_ftype *sfunc);
 135
 136 extern void set_cmd_completer (struct cmd_list_element *cmd,
 137                                char **(*completer) (char *text, char *word));
 138
 139 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
 140    around in cmd objects to test the value of the commands sfunc().  */
 141 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
 142                          void (*cfunc) (char *args, int from_tty));
 143
 144 /* Each command object has a local context attached to it. .  */
 145 extern void set_cmd_context (struct cmd_list_element *cmd, void *context);
 146 extern void *get_cmd_context (struct cmd_list_element *cmd);
 147
 148
 149 /* Execute CMD's pre/post hook.  Throw an error if the command fails.
 150    If already executing this pre/post hook, or there is no pre/post
 151    hook, the call is silently ignored.  */
 152 extern void execute_cmd_pre_hook (struct cmd_list_element *cmd);
 153 extern void execute_cmd_post_hook (struct cmd_list_element *cmd);
 154
 155 /* Return the type of the command.  */
 156 /* NOTE: cagney/2002-03-17: The deprecated_add_show_from_set()
 157    function clones the set command passed as a parameter.  The clone
 158    operation will include (BUG?) any ``set'' command callback, if
 159    present.  Commands like ``info set'' call all the ``show'' command
 160    callbacks.  Unfortunately, for ``show'' commands cloned from
 161    ``set'', this includes callbacks belonging to ``set'' commands.
 162    Making this worse, this only occures if
 163    deprecated_add_show_from_set() is called after add_cmd_sfunc()
 164    (BUG?).  */
 165 extern enum cmd_types cmd_type (struct cmd_list_element *cmd);
 166
 167
 168 extern struct cmd_list_element *lookup_cmd (char **,
 169                                             struct cmd_list_element *, char *,
 170                                             int, int);
 171
 172 extern struct cmd_list_element *lookup_cmd_1 (char **,
 173                                               struct cmd_list_element *,
 174                                               struct cmd_list_element **,
 175                                               int);
 176
 177 extern struct cmd_list_element *
 178   deprecate_cmd (struct cmd_list_element *, char * );
 179
 180 extern void
 181   deprecated_cmd_warning (char **);
 182
 183 extern int
 184   lookup_cmd_composition (char *text,
 185                         struct cmd_list_element **alias,
 186                         struct cmd_list_element **prefix_cmd,
 187                         struct cmd_list_element **cmd);
 188
 189 extern struct cmd_list_element *add_com (char *, enum command_class,
 190                                          void (*fun) (char *, int), char *);
 191
 192 extern struct cmd_list_element *add_com_alias (char *, char *,
 193                                                enum command_class, int);
 194
 195 extern struct cmd_list_element *add_info (char *, void (*fun) (char *, int),
 196                                           char *);
 197
 198 extern struct cmd_list_element *add_info_alias (char *, char *, int);
 199
 200 extern char **complete_on_cmdlist (struct cmd_list_element *, char *, char *);
 201
 202 extern char **complete_on_enum (const char *enumlist[], char *, char *);
 203
 204 extern void delete_cmd (char *, struct cmd_list_element **);
 205
 206 extern void help_cmd (char *, struct ui_file *);
 207
 208 extern void help_list (struct cmd_list_element *, char *,
 209                        enum command_class, struct ui_file *);
 210
 211 extern void help_cmd_list (struct cmd_list_element *, enum command_class,
 212                            char *, int, struct ui_file *);
 213
 214 extern struct cmd_list_element *add_set_cmd (char *name, enum
 215                                              command_class class,
 216                                              var_types var_type, void *var,
 217                                              char *doc,
 218                                              struct cmd_list_element **list);
 219
 220 extern struct cmd_list_element *add_set_enum_cmd (char *name,
 221                                                   enum command_class class,
 222                                                   const char *enumlist[],
 223                                                   const char **var,
 224                                                   char *doc,
 225                                                   struct cmd_list_element **list);
 226
 227 /* Print the set|show CMD's variable's VALUE on FILE.  Do not include
 228    a trailing "\n".  */
 229 typedef void (fprint_setshow_ftype) (struct cmd_list_element *cmd,
 230                                      struct ui_file *file,
 231                                      const char *value);
 232
 233 /* Method for show a set/show variable's VALUE on FILE.  If this
 234    method isn't supplied deprecated_show_value_hack() is called (which
 235    is not good).  */
 236 typedef void (show_value_ftype) (struct ui_file *file,
 237                                  int from_tty,
 238                                  struct cmd_list_element *cmd,
 239                                  const char *value);
 240 /* NOTE: i18n: This function is not i18n friendly.  Callers should
 241    instead print the value out directly.  */
 242 extern show_value_ftype deprecated_show_value_hack;
 243
 244 extern void add_setshow_enum_cmd (char *name,
 245                                   enum command_class class,
 246                                   const char *enumlist[],
 247                                   const char **var,
 248                                   const char *set_doc,
 249                                   const char *show_doc,
 250                                   const char *help_doc,
 251                                   fprint_setshow_ftype *fprint_setshow,
 252                                   cmd_sfunc_ftype *set_func,
 253                                   show_value_ftype *show_func,
 254                                   struct cmd_list_element **set_list,
 255                                   struct cmd_list_element **show_list);
 256
 257 extern void add_setshow_auto_boolean_cmd (char *name,
 258                                           enum command_class class,
 259                                           enum auto_boolean *var,
 260                                           const char *set_doc,
 261                                           const char *show_doc,
 262                                           const char *help_doc,
 263                                           fprint_setshow_ftype *fprint_setshow,
 264                                           cmd_sfunc_ftype *set_func,
 265                                           show_value_ftype *show_func,
 266                                           struct cmd_list_element **set_list,
 267                                           struct cmd_list_element **show_list);
 268
 269 extern void add_setshow_boolean_cmd (char *name,
 270                                      enum command_class class,
 271                                      int *var,
 272                                      const char *set_doc, const char *show_doc,
 273                                      const char *help_doc, fprint_setshow_ftype *fprint_setshow,
 274                                      cmd_sfunc_ftype *set_func,
 275                                      show_value_ftype *show_func,
 276                                      struct cmd_list_element **set_list,
 277                                      struct cmd_list_element **show_list);
 278
 279 extern void add_setshow_filename_cmd (char *name,
 280                                       enum command_class class,
 281                                       char **var,
 282                                       const char *set_doc,
 283                                       const char *show_doc,
 284                                       const char *help_doc,
 285                                       fprint_setshow_ftype *fprint_setshow,
 286                                       cmd_sfunc_ftype *set_func,
 287                                       show_value_ftype *show_func,
 288                                       struct cmd_list_element **set_list,
 289                                       struct cmd_list_element **show_list);
 290
 291 extern void add_setshow_string_cmd (char *name,
 292                                     enum command_class class,
 293                                     char **var,
 294                                     const char *set_doc,
 295                                     const char *show_doc,
 296                                     const char *help_doc,
 297                                     fprint_setshow_ftype *fprint_setshow,
 298                                     cmd_sfunc_ftype *set_func,
 299                                     show_value_ftype *show_func,
 300                                     struct cmd_list_element **set_list,
 301                                     struct cmd_list_element **show_list);
 302
 303 extern void add_setshow_uinteger_cmd (char *name,
 304                                       enum command_class class,
 305                                       unsigned int *var,
 306                                       const char *set_doc,
 307                                       const char *show_doc,
 308                                       const char *help_doc,
 309                                       fprint_setshow_ftype *fprint_setshow,
 310                                       cmd_sfunc_ftype *set_func,
 311                                       show_value_ftype *show_func,
 312                                       struct cmd_list_element **set_list,
 313                                       struct cmd_list_element **show_list);
 314
 315 extern void add_setshow_zinteger_cmd (char *name,
 316                                       enum command_class class,
 317                                       int *var,
 318                                       const char *set_doc,
 319                                       const char *show_doc,
 320                                       const char *help_doc,
 321                                       fprint_setshow_ftype *fprint_setshow,
 322                                       cmd_sfunc_ftype *set_func,
 323                                       show_value_ftype *show_func,
 324                                       struct cmd_list_element **set_list,
 325                                       struct cmd_list_element **show_list);
 326
 327 extern struct cmd_list_element *deprecated_add_show_from_set (struct cmd_list_element *,
 328                                                               struct cmd_list_element **);
 329
 330 /* Do a "show" command for each thing on a command list.  */
 331
 332 extern void cmd_show_list (struct cmd_list_element *, int, char *);
 333
 334 extern NORETURN void error_no_arg (char *) ATTR_NORETURN;
 335
 336 extern void dont_repeat (void);
 337
 338 /* Used to mark commands that don't do anything.  If we just leave the
 339    function field NULL, the command is interpreted as a help topic, or
 340    as a class of commands.  */
 341
 342 extern void not_just_help_class_command (char *, int);
 343
 344 /* check function pointer */
 345 extern int cmd_func_p (struct cmd_list_element *cmd);
 346
 347 /* call the command function */
 348 extern void cmd_func (struct cmd_list_element *cmd, char *args, int from_tty);
 349
 350 #endif /* !defined (COMMAND_H) */