gdb/cli/cli-decode.h

   1 /* Header file for GDB command decoding library.
   2
   3    Copyright 2000, 2003 Free Software Foundation, Inc.
   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
  17    Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #if !defined (CLI_DECODE_H)
  21 #define CLI_DECODE_H 1
  22
  23 #include "command.h"
  24
  25 struct re_pattern_buffer;
  26
  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".  */
  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;
  40 #endif
  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
  64     /* Function definition of this command.  NULL for command class
  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.  */
  72     union
  73       {
  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;
  79       }
  80     function;
  81
  82     /* Local state (context) for this command.  This can be anything.  */
  83     void *context;
  84
  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
  91     /* flags : a bitfield
  92
  93        bit 0: (LSB) CMD_DEPRECATED, when 1 indicated that this command
  94        is deprecated. It may be removed from gdb's command set in the
  95        future.
  96
  97        bit 1: DEPRECATED_WARN_USER, the user needs to be warned that
  98        this is a deprecated command.  The user should only be warned
  99        the first time a command is used.
 100
 101        bit 2: MALLOCED_REPLACEMENT, when functions are deprecated at
 102        compile time (this is the way it should, in general, be done)
 103        the memory containing the replacement string is statically
 104        allocated.  In some cases it makes sense to deprecate commands
 105        at runtime (the testsuite is one example).  In this case the
 106        memory for replacement is malloc'ed.  When a command is
 107        undeprecated or re-deprecated at runtime we don't want to risk
 108        calling free on statically allocated memory, so we check this
 109        flag.
 110      */
 111     int flags;
 112
 113     /* if this command is deprecated, this is the replacement name */
 114     char *replacement;
 115
 116     /* If this command represents a show command, then this function
 117        is called before the variable's value is examined.  */
 118     void (*pre_show_hook) (struct cmd_list_element *c);
 119
 120     /* Hook for another command to be executed before this command.  */
 121     struct cmd_list_element *hook_pre;
 122
 123     /* Hook for another command to be executed after this command.  */
 124     struct cmd_list_element *hook_post;
 125
 126     /* Flag that specifies if this command is already running it's hook. */
 127     /* Prevents the possibility of hook recursion. */
 128     int hook_in;
 129
 130     /* Nonzero identifies a prefix command.  For them, the address
 131        of the variable containing the list of subcommands.  */
 132     struct cmd_list_element **prefixlist;
 133
 134     /* For prefix commands only:
 135        String containing prefix commands to get here: this one
 136        plus any others needed to get to it.  Should end in a space.
 137        It is used before the word "command" in describing the
 138        commands reached through this prefix.  */
 139     char *prefixname;
 140
 141     /* For prefix commands only:
 142        nonzero means do not get an error if subcommand is not
 143        recognized; call the prefix's own function in that case.  */
 144     char allow_unknown;
 145
 146     /* Nonzero says this is an abbreviation, and should not
 147        be mentioned in lists of commands.
 148        This allows "br<tab>" to complete to "break", which it
 149        otherwise wouldn't.  */
 150     char abbrev_flag;
 151
 152     /* Completion routine for this command.  TEXT is the text beyond
 153        what was matched for the command itself (leading whitespace is
 154        skipped).  It stops where we are supposed to stop completing
 155        (rl_point) and is '\0' terminated.
 156
 157        Return value is a malloc'd vector of pointers to possible completions
 158        terminated with NULL.  If there are no completions, returning a pointer
 159        to a NULL would work but returning NULL itself is also valid.
 160        WORD points in the same buffer as TEXT, and completions should be
 161        returned relative to this position.  For example, suppose TEXT is "foo"
 162        and we want to complete to "foobar".  If WORD is "oo", return
 163        "oobar"; if WORD is "baz/foo", return "baz/foobar".  */
 164     char **(*completer) (char *text, char *word);
 165
 166     /* Type of "set" or "show" command (or SET_NOT_SET if not "set"
 167        or "show").  */
 168     cmd_types type;
 169
 170     /* Pointer to variable affected by "set" and "show".  Doesn't matter
 171        if type is not_set.  */
 172     void *var;
 173
 174     /* What kind of variable is *VAR?  */
 175     var_types var_type;
 176
 177     /* Pointer to NULL terminated list of enumerated values (like argv).  */
 178     const char **enums;
 179
 180     /* Pointer to command strings of user-defined commands */
 181     struct command_line *user_commands;
 182
 183     /* Pointer to command that is hooked by this one, (by hook_pre)
 184        so the hook can be removed when this one is deleted.  */
 185     struct cmd_list_element *hookee_pre;
 186
 187     /* Pointer to command that is hooked by this one, (by hook_post)
 188        so the hook can be removed when this one is deleted.  */
 189     struct cmd_list_element *hookee_post;
 190
 191     /* Pointer to command that is aliased by this one, so the
 192        aliased command can be located in case it has been hooked.  */
 193     struct cmd_list_element *cmd_pointer;
 194   };
 195
 196 /* API to the manipulation of command lists.  */
 197
 198 extern struct cmd_list_element *add_cmd (char *, enum command_class,
 199                                          void (*fun) (char *, int), char *,
 200                                          struct cmd_list_element **);
 201
 202 extern struct cmd_list_element *add_alias_cmd (char *, char *,
 203                                                enum command_class, int,
 204                                                struct cmd_list_element **);
 205
 206 extern struct cmd_list_element *add_prefix_cmd (char *, enum command_class,
 207                                                 void (*fun) (char *, int),
 208                                                 char *,
 209                                                 struct cmd_list_element **,
 210                                                 char *, int,
 211                                                 struct cmd_list_element **);
 212
 213 extern struct cmd_list_element *add_abbrev_prefix_cmd (char *,
 214                                                        enum command_class,
 215                                                        void (*fun) (char *,
 216                                                                     int),
 217                                                        char *,
 218                                                        struct cmd_list_element
 219                                                        **, char *, int,
 220                                                        struct cmd_list_element
 221                                                        **);
 222
 223 /* Set the commands corresponding callback.  */
 224
 225 extern void set_cmd_cfunc (struct cmd_list_element *cmd,
 226                            void (*cfunc) (char *args, int from_tty));
 227
 228 extern void set_cmd_sfunc (struct cmd_list_element *cmd,
 229                            void (*sfunc) (char *args, int from_tty,
 230                                           struct cmd_list_element * c));
 231
 232 extern void set_cmd_completer (struct cmd_list_element *cmd,
 233                                char **(*completer) (char *text, char *word));
 234
 235 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
 236    around in cmd objects to test the value of the commands sfunc().  */
 237 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
 238                          void (*cfunc) (char *args, int from_tty));
 239
 240 /* Access to the command's local context.  */
 241 extern void set_cmd_context (struct cmd_list_element *cmd, void *context);
 242 extern void *get_cmd_context (struct cmd_list_element *cmd);
 243
 244 extern struct cmd_list_element *lookup_cmd (char **,
 245                                             struct cmd_list_element *, char *,
 246                                             int, int);
 247
 248 extern struct cmd_list_element *lookup_cmd_1 (char **,
 249                                               struct cmd_list_element *,
 250                                               struct cmd_list_element **,
 251                                               int);
 252
 253 extern struct cmd_list_element *
 254   deprecate_cmd (struct cmd_list_element *, char * );
 255
 256 extern void
 257   deprecated_cmd_warning (char **);
 258
 259 extern int
 260   lookup_cmd_composition (char *text,
 261                         struct cmd_list_element **alias,
 262                         struct cmd_list_element **prefix_cmd,
 263                         struct cmd_list_element **cmd);
 264
 265 extern struct cmd_list_element *add_com (char *, enum command_class,
 266                                          void (*fun) (char *, int), char *);
 267
 268 extern struct cmd_list_element *add_com_alias (char *, char *,
 269                                                enum command_class, int);
 270
 271 extern struct cmd_list_element *add_info (char *, void (*fun) (char *, int),
 272                                           char *);
 273
 274 extern struct cmd_list_element *add_info_alias (char *, char *, int);
 275
 276 extern char **complete_on_cmdlist (struct cmd_list_element *, char *, char *);
 277
 278 extern char **complete_on_enum (const char *enumlist[], char *, char *);
 279
 280 extern void delete_cmd (char *, struct cmd_list_element **);
 281
 282 extern void help_cmd_list (struct cmd_list_element *, enum command_class,
 283                            char *, int, struct ui_file *);
 284
 285 extern struct cmd_list_element *add_set_cmd (char *name, enum
 286                                              command_class class,
 287                                              var_types var_type, void *var,
 288                                              char *doc,
 289                                              struct cmd_list_element **list);
 290
 291 extern struct cmd_list_element *add_set_enum_cmd (char *name,
 292                                                   enum command_class class,
 293                                                   const char *enumlist[],
 294                                                   const char **var,
 295                                                   char *doc,
 296                                                   struct cmd_list_element **list);
 297
 298 extern struct cmd_list_element *add_show_from_set (struct cmd_list_element *,
 299                                                    struct cmd_list_element
 300                                                    **);
 301
 302 /* Functions that implement commands about CLI commands. */
 303
 304 extern void help_cmd (char *, struct ui_file *);
 305
 306 extern void help_list (struct cmd_list_element *, char *,
 307                        enum command_class, struct ui_file *);
 308
 309 extern void apropos_cmd (struct ui_file *, struct cmd_list_element *,
 310                          struct re_pattern_buffer *, char *);
 311
 312 /* Used to mark commands that don't do anything.  If we just leave the
 313    function field NULL, the command is interpreted as a help topic, or
 314    as a class of commands.  */
 315
 316 extern void not_just_help_class_command (char *arg, int from_tty);
 317
 318 /* Exported to cli/cli-setshow.c */
 319
 320 extern void print_doc_line (struct ui_file *, char *);
 321
 322
 323 #endif /* !defined (CLI_DECODE_H) */