gdb/cli/cli-decode.h

   1 /* Header file for GDB command decoding library.
   2
   3    Copyright (c) 2000, 2003, 2007 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 3 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, see <http://www.gnu.org/licenses/>.  */
  17
  18 #if !defined (CLI_DECODE_H)
  19 #define CLI_DECODE_H 1
  20
  21 #include "command.h"
  22
  23 struct re_pattern_buffer;
  24
  25 #if 0
  26 /* FIXME: cagney/2002-03-17: Once cmd_type() has been removed, ``enum
  27    cmd_types'' can be moved from "command.h" to "cli-decode.h".  */
  28 /* Not a set/show command.  Note that some commands which begin with
  29    "set" or "show" might be in this category, if their syntax does
  30    not fall into one of the following categories.  */
  31 typedef enum cmd_types
  32   {
  33     not_set_cmd,
  34     set_cmd,
  35     show_cmd
  36   }
  37 cmd_types;
  38 #endif
  39
  40 /* This structure records one command'd definition.  */
  41
  42
  43 /* This flag is used by the code executing commands to warn the user
  44    the first time a deprecated command is used, see the 'flags' field in
  45    the following struct.
  46 */
  47 #define CMD_DEPRECATED            0x1
  48 #define DEPRECATED_WARN_USER      0x2
  49 #define MALLOCED_REPLACEMENT      0x4
  50
  51 struct cmd_list_element
  52   {
  53     /* Points to next command in this list.  */
  54     struct cmd_list_element *next;
  55
  56     /* Name of this command.  */
  57     char *name;
  58
  59     /* Command class; class values are chosen by application program.  */
  60     enum command_class class;
  61
  62     /* Function definition of this command.  NULL for command class
  63        names and for help topics that are not really commands.  NOTE:
  64        cagney/2002-02-02: This function signature is evolving.  For
  65        the moment suggest sticking with either set_cmd_cfunc() or
  66        set_cmd_sfunc().  */
  67     void (*func) (struct cmd_list_element *c, char *args, int from_tty);
  68     /* The command's real callback.  At present func() bounces through
  69        to one of the below.  */
  70     union
  71       {
  72         /* If type is not_set_cmd, call it like this: */
  73         cmd_cfunc_ftype *cfunc;
  74         /* If type is set_cmd or show_cmd, first set the variables,
  75            and then call this: */
  76         cmd_sfunc_ftype *sfunc;
  77       }
  78     function;
  79
  80     /* Local state (context) for this command.  This can be anything.  */
  81     void *context;
  82
  83     /* Documentation of this command (or help topic).
  84        First line is brief documentation; remaining lines form, with it,
  85        the full documentation.  First line should end with a period.
  86        Entire string should also end with a period, not a newline.  */
  87     char *doc;
  88
  89     /* For set/show commands.  A method for printing the output to the
  90        specified stream.  */
  91     show_value_ftype *show_value_func;
  92
  93     /* flags : a bitfield
  94
  95        bit 0: (LSB) CMD_DEPRECATED, when 1 indicated that this command
  96        is deprecated. It may be removed from gdb's command set in the
  97        future.
  98
  99        bit 1: DEPRECATED_WARN_USER, the user needs to be warned that
 100        this is a deprecated command.  The user should only be warned
 101        the first time a command is used.
 102
 103        bit 2: MALLOCED_REPLACEMENT, when functions are deprecated at
 104        compile time (this is the way it should, in general, be done)
 105        the memory containing the replacement string is statically
 106        allocated.  In some cases it makes sense to deprecate commands
 107        at runtime (the testsuite is one example).  In this case the
 108        memory for replacement is malloc'ed.  When a command is
 109        undeprecated or re-deprecated at runtime we don't want to risk
 110        calling free on statically allocated memory, so we check this
 111        flag.
 112      */
 113     int flags;
 114
 115     /* If this command is deprecated, this is the replacement name.  */
 116     char *replacement;
 117
 118     /* If this command represents a show command, then this function
 119        is called before the variable's value is examined.  */
 120     void (*pre_show_hook) (struct cmd_list_element *c);
 121
 122     /* Hook for another command to be executed before this command.  */
 123     struct cmd_list_element *hook_pre;
 124
 125     /* Hook for another command to be executed after this command.  */
 126     struct cmd_list_element *hook_post;
 127
 128     /* Flag that specifies if this command is already running it's hook.  */
 129     /* Prevents the possibility of hook recursion.  */
 130     int hook_in;
 131
 132     /* Nonzero identifies a prefix command.  For them, the address
 133        of the variable containing the list of subcommands.  */
 134     struct cmd_list_element **prefixlist;
 135
 136     /* For prefix commands only:
 137        String containing prefix commands to get here: this one
 138        plus any others needed to get to it.  Should end in a space.
 139        It is used before the word "command" in describing the
 140        commands reached through this prefix.  */
 141     char *prefixname;
 142
 143     /* For prefix commands only:
 144        nonzero means do not get an error if subcommand is not
 145        recognized; call the prefix's own function in that case.  */
 146     char allow_unknown;
 147
 148     /* Nonzero says this is an abbreviation, and should not
 149        be mentioned in lists of commands.
 150        This allows "br<tab>" to complete to "break", which it
 151        otherwise wouldn't.  */
 152     char abbrev_flag;
 153
 154     /* Completion routine for this command.  TEXT is the text beyond
 155        what was matched for the command itself (leading whitespace is
 156        skipped).  It stops where we are supposed to stop completing
 157        (rl_point) and is '\0' terminated.
 158
 159        Return value is a malloc'd vector of pointers to possible completions
 160        terminated with NULL.  If there are no completions, returning a pointer
 161        to a NULL would work but returning NULL itself is also valid.
 162        WORD points in the same buffer as TEXT, and completions should be
 163        returned relative to this position.  For example, suppose TEXT is "foo"
 164        and we want to complete to "foobar".  If WORD is "oo", return
 165        "oobar"; if WORD is "baz/foo", return "baz/foobar".  */
 166     char **(*completer) (char *text, char *word);
 167
 168     /* Type of "set" or "show" command (or SET_NOT_SET if not "set"
 169        or "show").  */
 170     cmd_types type;
 171
 172     /* Pointer to variable affected by "set" and "show".  Doesn't matter
 173        if type is not_set.  */
 174     void *var;
 175
 176     /* What kind of variable is *VAR?  */
 177     var_types var_type;
 178
 179     /* Pointer to NULL terminated list of enumerated values (like argv).  */
 180     const char **enums;
 181
 182     /* Pointer to command strings of user-defined commands */
 183     struct command_line *user_commands;
 184
 185     /* Pointer to command that is hooked by this one, (by hook_pre)
 186        so the hook can be removed when this one is deleted.  */
 187     struct cmd_list_element *hookee_pre;
 188
 189     /* Pointer to command that is hooked by this one, (by hook_post)
 190        so the hook can be removed when this one is deleted.  */
 191     struct cmd_list_element *hookee_post;
 192
 193     /* Pointer to command that is aliased by this one, so the
 194        aliased command can be located in case it has been hooked.  */
 195     struct cmd_list_element *cmd_pointer;
 196   };
 197
 198 /* API to the manipulation of command lists.  */
 199
 200 extern struct cmd_list_element *add_cmd (char *, enum command_class,
 201                                          void (*fun) (char *, int), char *,
 202                                          struct cmd_list_element **);
 203
 204 extern struct cmd_list_element *add_alias_cmd (char *, char *,
 205                                                enum command_class, int,
 206                                                struct cmd_list_element **);
 207
 208 extern struct cmd_list_element *add_prefix_cmd (char *, enum command_class,
 209                                                 void (*fun) (char *, int),
 210                                                 char *,
 211                                                 struct cmd_list_element **,
 212                                                 char *, int,
 213                                                 struct cmd_list_element **);
 214
 215 extern struct cmd_list_element *add_abbrev_prefix_cmd (char *,
 216                                                        enum command_class,
 217                                                        void (*fun) (char *,
 218                                                                     int),
 219                                                        char *,
 220                                                        struct cmd_list_element
 221                                                        **, char *, int,
 222                                                        struct cmd_list_element
 223                                                        **);
 224
 225 /* Set the commands corresponding callback.  */
 226
 227 extern void set_cmd_cfunc (struct cmd_list_element *cmd,
 228                            void (*cfunc) (char *args, int from_tty));
 229
 230 extern void set_cmd_sfunc (struct cmd_list_element *cmd,
 231                            void (*sfunc) (char *args, int from_tty,
 232                                           struct cmd_list_element * c));
 233
 234 extern void set_cmd_completer (struct cmd_list_element *cmd,
 235                                char **(*completer) (char *text, char *word));
 236
 237 /* HACK: cagney/2002-02-23: Code, mostly in tracepoints.c, grubs
 238    around in cmd objects to test the value of the commands sfunc().  */
 239 extern int cmd_cfunc_eq (struct cmd_list_element *cmd,
 240                          void (*cfunc) (char *args, int from_tty));
 241
 242 /* Access to the command's local context.  */
 243 extern void set_cmd_context (struct cmd_list_element *cmd, void *context);
 244 extern void *get_cmd_context (struct cmd_list_element *cmd);
 245
 246 extern struct cmd_list_element *lookup_cmd (char **,
 247                                             struct cmd_list_element *, char *,
 248                                             int, int);
 249
 250 extern struct cmd_list_element *lookup_cmd_1 (char **,
 251                                               struct cmd_list_element *,
 252                                               struct cmd_list_element **,
 253                                               int);
 254
 255 extern struct cmd_list_element *
 256   deprecate_cmd (struct cmd_list_element *, char * );
 257
 258 extern void
 259   deprecated_cmd_warning (char **);
 260
 261 extern int
 262   lookup_cmd_composition (char *text,
 263                         struct cmd_list_element **alias,
 264                         struct cmd_list_element **prefix_cmd,
 265                         struct cmd_list_element **cmd);
 266
 267 extern struct cmd_list_element *add_com (char *, enum command_class,
 268                                          void (*fun) (char *, int), char *);
 269
 270 extern struct cmd_list_element *add_com_alias (char *, char *,
 271                                                enum command_class, int);
 272
 273 extern struct cmd_list_element *add_info (char *, void (*fun) (char *, int),
 274                                           char *);
 275
 276 extern struct cmd_list_element *add_info_alias (char *, char *, int);
 277
 278 extern char **complete_on_cmdlist (struct cmd_list_element *, char *, char *);
 279
 280 extern char **complete_on_enum (const char *enumlist[], char *, char *);
 281
 282 extern void delete_cmd (char *, struct cmd_list_element **);
 283
 284 extern void help_cmd_list (struct cmd_list_element *, enum command_class,
 285                            char *, int, struct ui_file *);
 286
 287 /* Functions that implement commands about CLI commands. */
 288
 289 extern void help_cmd (char *, struct ui_file *);
 290
 291 extern void help_list (struct cmd_list_element *, char *,
 292                        enum command_class, struct ui_file *);
 293
 294 extern void apropos_cmd (struct ui_file *, struct cmd_list_element *,
 295                          struct re_pattern_buffer *, char *);
 296
 297 /* Used to mark commands that don't do anything.  If we just leave the
 298    function field NULL, the command is interpreted as a help topic, or
 299    as a class of commands.  */
 300
 301 extern void not_just_help_class_command (char *arg, int from_tty);
 302
 303 /* Exported to cli/cli-setshow.c */
 304
 305 extern void print_doc_line (struct ui_file *, char *);
 306
 307
 308 #endif /* !defined (CLI_DECODE_H) */