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     /* Enumerated type.  Can only have one of the specified values.  *VAR is a
  91        char pointer to the name of the element that we find.  */
  92     var_enum
  93   }
  94 var_types;
  95
  96 /* This structure records one command'd definition.  */
  97 struct cmd_list_element;
  98
  99 /* Forward-declarations of the entry-points of cli/cli-decode.c.  */
 100
 101 extern struct cmd_list_element *add_cmd (char *, enum command_class,
 102                                          void (*fun) (char *, int), char *,
 103                                          struct cmd_list_element **);
 104
 105 extern struct cmd_list_element *add_alias_cmd (char *, char *,
 106                                                enum command_class, int,
 107                                                struct cmd_list_element **);
 108
 109 extern struct cmd_list_element *add_prefix_cmd (char *, enum command_class,
 110                                                 void (*fun) (char *, int),
 111                                                 char *,
 112                                                 struct cmd_list_element **,
 113                                                 char *, int,
 114                                                 struct cmd_list_element **);
 115
 116 extern struct cmd_list_element *add_abbrev_prefix_cmd (char *,
 117                                                        enum command_class,
 118                                                        void (*fun) (char *,
 119                                                                     int),
 120                                                        char *,
 121                                                        struct cmd_list_element
 122                                                        **, char *, int,
 123                                                        struct cmd_list_element
 124                                                        **);
 125
 126 /* Set the commands corresponding callback.  */
 127
 128 typedef void cmd_cfunc_ftype (char *args, int from_tty);
 129 extern void set_cmd_cfunc (struct cmd_list_element *cmd,
 130                            cmd_cfunc_ftype *cfunc);
 131
 132 typedef void cmd_sfunc_ftype (char *args, int from_tty,
 133                               struct cmd_list_element *c);
 134 extern void set_cmd_sfunc (struct cmd_list_element *cmd,
 135                            cmd_sfunc_ftype *sfunc);
 136
 137 extern void set_cmd_completer (struct cmd_list_element *cmd,
 138                                char **(*completer) (char *text, char *word));
 139
 140 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
 141    around in cmd objects to test the value of the commands sfunc().  */
 142 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
 143                          void (*cfunc) (char *args, int from_tty));
 144
 145 /* Each command object has a local context attached to it. .  */
 146 extern void set_cmd_context (struct cmd_list_element *cmd, void *context);
 147 extern void *get_cmd_context (struct cmd_list_element *cmd);
 148
 149
 150 /* Execute CMD's pre/post hook.  Throw an error if the command fails.
 151    If already executing this pre/post hook, or there is no pre/post
 152    hook, the call is silently ignored.  */
 153 extern void execute_cmd_pre_hook (struct cmd_list_element *cmd);
 154 extern void execute_cmd_post_hook (struct cmd_list_element *cmd);
 155
 156 /* Return the type of the command.  */
 157 extern enum cmd_types cmd_type (struct cmd_list_element *cmd);
 158
 159
 160 extern struct cmd_list_element *lookup_cmd (char **,
 161                                             struct cmd_list_element *, char *,
 162                                             int, int);
 163
 164 extern struct cmd_list_element *lookup_cmd_1 (char **,
 165                                               struct cmd_list_element *,
 166                                               struct cmd_list_element **,
 167                                               int);
 168
 169 extern struct cmd_list_element *
 170   deprecate_cmd (struct cmd_list_element *, char * );
 171
 172 extern void
 173   deprecated_cmd_warning (char **);
 174
 175 extern int
 176   lookup_cmd_composition (char *text,
 177                         struct cmd_list_element **alias,
 178                         struct cmd_list_element **prefix_cmd,
 179                         struct cmd_list_element **cmd);
 180
 181 extern struct cmd_list_element *add_com (char *, enum command_class,
 182                                          void (*fun) (char *, int), char *);
 183
 184 extern struct cmd_list_element *add_com_alias (char *, char *,
 185                                                enum command_class, int);
 186
 187 extern struct cmd_list_element *add_info (char *, void (*fun) (char *, int),
 188                                           char *);
 189
 190 extern struct cmd_list_element *add_info_alias (char *, char *, int);
 191
 192 extern char **complete_on_cmdlist (struct cmd_list_element *, char *, char *);
 193
 194 extern char **complete_on_enum (const char *enumlist[], char *, char *);
 195
 196 extern void help_cmd (char *, struct ui_file *);
 197
 198 extern void help_list (struct cmd_list_element *, char *,
 199                        enum command_class, struct ui_file *);
 200
 201 extern void help_cmd_list (struct cmd_list_element *, enum command_class,
 202                            char *, int, struct ui_file *);
 203
 204 /* NOTE: cagney/2005-02-21: Since every set command should be paired
 205    with a corresponding show command (i.e., add_setshow_*) this call
 206    should not be needed.  Unfortunatly some are not (e.g.,
 207    "maintenance <variable> <value>") and those need to be fixed.  */
 208 extern struct cmd_list_element *deprecated_add_set_cmd (char *name, enum
 209                                                         command_class class,
 210                                                         var_types var_type, void *var,
 211                                                         char *doc,
 212                                                         struct cmd_list_element **list);
 213
 214 /* Method for show a set/show variable's VALUE on FILE.  If this
 215    method isn't supplied deprecated_show_value_hack() is called (which
 216    is not good).  */
 217 typedef void (show_value_ftype) (struct ui_file *file,
 218                                  int from_tty,
 219                                  struct cmd_list_element *cmd,
 220                                  const char *value);
 221 /* NOTE: i18n: This function is not i18n friendly.  Callers should
 222    instead print the value out directly.  */
 223 extern show_value_ftype deprecated_show_value_hack;
 224
 225 extern void add_setshow_enum_cmd (char *name,
 226                                   enum command_class class,
 227                                   const char *enumlist[],
 228                                   const char **var,
 229                                   const char *set_doc,
 230                                   const char *show_doc,
 231                                   const char *help_doc,
 232                                   cmd_sfunc_ftype *set_func,
 233                                   show_value_ftype *show_func,
 234                                   struct cmd_list_element **set_list,
 235                                   struct cmd_list_element **show_list);
 236
 237 extern void add_setshow_auto_boolean_cmd (char *name,
 238                                           enum command_class class,
 239                                           enum auto_boolean *var,
 240                                           const char *set_doc,
 241                                           const char *show_doc,
 242                                           const char *help_doc,
 243                                           cmd_sfunc_ftype *set_func,
 244                                           show_value_ftype *show_func,
 245                                           struct cmd_list_element **set_list,
 246                                           struct cmd_list_element **show_list);
 247
 248 extern void add_setshow_boolean_cmd (char *name,
 249                                      enum command_class class,
 250                                      int *var,
 251                                      const char *set_doc, const char *show_doc,
 252                                      const char *help_doc,
 253                                      cmd_sfunc_ftype *set_func,
 254                                      show_value_ftype *show_func,
 255                                      struct cmd_list_element **set_list,
 256                                      struct cmd_list_element **show_list);
 257
 258 extern void add_setshow_filename_cmd (char *name,
 259                                       enum command_class class,
 260                                       char **var,
 261                                       const char *set_doc,
 262                                       const char *show_doc,
 263                                       const char *help_doc,
 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_string_cmd (char *name,
 270                                     enum command_class class,
 271                                     char **var,
 272                                     const char *set_doc,
 273                                     const char *show_doc,
 274                                     const char *help_doc,
 275                                     cmd_sfunc_ftype *set_func,
 276                                     show_value_ftype *show_func,
 277                                     struct cmd_list_element **set_list,
 278                                     struct cmd_list_element **show_list);
 279
 280 extern void add_setshow_string_noescape_cmd (char *name,
 281                                              enum command_class class,
 282                                              char **var,
 283                                              const char *set_doc,
 284                                              const char *show_doc,
 285                                              const char *help_doc,
 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_optional_filename_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                                                cmd_sfunc_ftype *set_func,
 298                                                show_value_ftype *show_func,
 299                                                struct cmd_list_element **set_list,
 300                                                struct cmd_list_element **show_list);
 301
 302 extern void add_setshow_integer_cmd (char *name,
 303                                      enum command_class class,
 304                                      int *var,
 305                                      const char *set_doc,
 306                                      const char *show_doc,
 307                                      const char *help_doc,
 308                                      cmd_sfunc_ftype *set_func,
 309                                      show_value_ftype *show_func,
 310                                      struct cmd_list_element **set_list,
 311                                      struct cmd_list_element **show_list);
 312
 313 extern void add_setshow_uinteger_cmd (char *name,
 314                                       enum command_class class,
 315                                       unsigned int *var,
 316                                       const char *set_doc,
 317                                       const char *show_doc,
 318                                       const char *help_doc,
 319                                       cmd_sfunc_ftype *set_func,
 320                                       show_value_ftype *show_func,
 321                                       struct cmd_list_element **set_list,
 322                                       struct cmd_list_element **show_list);
 323
 324 extern void add_setshow_zinteger_cmd (char *name,
 325                                       enum command_class class,
 326                                       int *var,
 327                                       const char *set_doc,
 328                                       const char *show_doc,
 329                                       const char *help_doc,
 330                                       cmd_sfunc_ftype *set_func,
 331                                       show_value_ftype *show_func,
 332                                       struct cmd_list_element **set_list,
 333                                       struct cmd_list_element **show_list);
 334
 335 /* Do a "show" command for each thing on a command list.  */
 336
 337 extern void cmd_show_list (struct cmd_list_element *, int, char *);
 338
 339 extern NORETURN void error_no_arg (char *) ATTR_NORETURN;
 340
 341 extern void dont_repeat (void);
 342
 343 /* Used to mark commands that don't do anything.  If we just leave the
 344    function field NULL, the command is interpreted as a help topic, or
 345    as a class of commands.  */
 346
 347 extern void not_just_help_class_command (char *, int);
 348
 349 /* check function pointer */
 350 extern int cmd_func_p (struct cmd_list_element *cmd);
 351
 352 /* call the command function */
 353 extern void cmd_func (struct cmd_list_element *cmd, char *args, int from_tty);
 354
 355 #endif /* !defined (COMMAND_H) */