1 /* Handle lists of commands, their decoding and documentation, for GDB.
3 Copyright (c) 1986, 1989, 1990, 1991, 1998, 2000, 2001, 2002, 2004, 2007,
4 2008, 2009 Free Software Foundation, Inc.
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.
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.
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/>. */
22 #include "gdb_regex.h"
23 #include "gdb_string.h"
24 #include "completer.h"
27 #include "cli/cli-cmds.h"
28 #include "cli/cli-decode.h"
31 #include "tui/tui.h" /* For tui_active et.al. */
34 #include "gdb_assert.h"
36 /* Prototypes for local functions */
38 static void undef_cmd_error (char *, char *);
40 static struct cmd_list_element *delete_cmd (char *name,
41 struct cmd_list_element **list,
42 struct cmd_list_element **prehook,
43 struct cmd_list_element **prehookee,
44 struct cmd_list_element **posthook,
45 struct cmd_list_element **posthookee);
47 static struct cmd_list_element *find_cmd (char *command,
49 struct cmd_list_element *clist,
50 int ignore_help_classes,
53 static void help_all (struct ui_file *stream);
56 print_help_for_command (struct cmd_list_element *c, char *prefix, int recurse,
57 struct ui_file *stream);
60 /* Set the callback function for the specified command. For each both
61 the commands callback and func() are set. The latter set to a
62 bounce function (unless cfunc / sfunc is NULL that is). */
65 do_cfunc (struct cmd_list_element *c, char *args, int from_tty)
67 c->function.cfunc (args, from_tty); /* Ok. */
71 set_cmd_cfunc (struct cmd_list_element *cmd, cmd_cfunc_ftype *cfunc)
77 cmd->function.cfunc = cfunc; /* Ok. */
81 do_sfunc (struct cmd_list_element *c, char *args, int from_tty)
83 c->function.sfunc (args, from_tty, c); /* Ok. */
87 set_cmd_sfunc (struct cmd_list_element *cmd, cmd_sfunc_ftype *sfunc)
93 cmd->function.sfunc = sfunc; /* Ok. */
97 cmd_cfunc_eq (struct cmd_list_element *cmd,
98 void (*cfunc) (char *args, int from_tty))
100 return cmd->func == do_cfunc && cmd->function.cfunc == cfunc;
104 set_cmd_context (struct cmd_list_element *cmd, void *context)
106 cmd->context = context;
110 get_cmd_context (struct cmd_list_element *cmd)
116 cmd_type (struct cmd_list_element *cmd)
122 set_cmd_completer (struct cmd_list_element *cmd,
123 char **(*completer) (struct cmd_list_element *self,
124 char *text, char *word))
126 cmd->completer = completer; /* Ok. */
130 /* Add element named NAME.
131 CLASS is the top level category into which commands are broken down
133 FUN should be the function to execute the command;
134 it will get a character string as argument, with leading
135 and trailing blanks already eliminated.
137 DOC is a documentation string for the command.
138 Its first line should be a complete sentence.
139 It should start with ? for a command that is an abbreviation
140 or with * for a command that most users don't need to know about.
142 Add this command to command list *LIST.
144 Returns a pointer to the added command (not necessarily the head
147 struct cmd_list_element *
148 add_cmd (char *name, enum command_class class, void (*fun) (char *, int),
149 char *doc, struct cmd_list_element **list)
151 struct cmd_list_element *c
152 = (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element));
153 struct cmd_list_element *p, *iter;
155 /* Turn each alias of the old command into an alias of the new
157 c->aliases = delete_cmd (name, list, &c->hook_pre, &c->hookee_pre,
158 &c->hook_post, &c->hookee_post);
159 for (iter = c->aliases; iter; iter = iter->alias_chain)
160 iter->cmd_pointer = c;
162 c->hook_pre->hookee_pre = c;
164 c->hookee_pre->hook_pre = c;
166 c->hook_post->hookee_post = c;
168 c->hookee_post->hook_post = c;
170 if (*list == NULL || strcmp ((*list)->name, name) >= 0)
178 while (p->next && strcmp (p->next->name, name) <= 0)
188 set_cmd_cfunc (c, fun);
189 set_cmd_context (c, NULL);
192 c->replacement = NULL;
193 c->pre_show_hook = NULL;
195 c->prefixlist = NULL;
196 c->prefixname = NULL;
197 c->allow_unknown = 0;
199 set_cmd_completer (c, make_symbol_completion_list_fn);
201 c->type = not_set_cmd;
203 c->var_type = var_boolean;
205 c->user_commands = NULL;
206 c->cmd_pointer = NULL;
207 c->alias_chain = NULL;
212 /* Deprecates a command CMD.
213 REPLACEMENT is the name of the command which should be used in place
214 of this command, or NULL if no such command exists.
216 This function does not check to see if command REPLACEMENT exists
217 since gdb may not have gotten around to adding REPLACEMENT when this
220 Returns a pointer to the deprecated command. */
222 struct cmd_list_element *
223 deprecate_cmd (struct cmd_list_element *cmd, char *replacement)
225 cmd->flags |= (CMD_DEPRECATED | DEPRECATED_WARN_USER);
227 if (replacement != NULL)
228 cmd->replacement = replacement;
230 cmd->replacement = NULL;
235 struct cmd_list_element *
236 add_alias_cmd (char *name, char *oldname, enum command_class class,
237 int abbrev_flag, struct cmd_list_element **list)
239 /* Must do this since lookup_cmd tries to side-effect its first arg */
241 struct cmd_list_element *old;
242 struct cmd_list_element *c;
243 copied_name = (char *) alloca (strlen (oldname) + 1);
244 strcpy (copied_name, oldname);
245 old = lookup_cmd (&copied_name, *list, "", 1, 1);
249 struct cmd_list_element *prehook, *prehookee, *posthook, *posthookee;
250 struct cmd_list_element *aliases = delete_cmd (name, list,
251 &prehook, &prehookee,
252 &posthook, &posthookee);
253 /* If this happens, it means a programmer error somewhere. */
254 gdb_assert (!aliases && !prehook && prehookee
255 && !posthook && ! posthookee);
259 c = add_cmd (name, class, NULL, old->doc, list);
260 /* NOTE: Both FUNC and all the FUNCTIONs need to be copied. */
262 c->function = old->function;
263 c->prefixlist = old->prefixlist;
264 c->prefixname = old->prefixname;
265 c->allow_unknown = old->allow_unknown;
266 c->abbrev_flag = abbrev_flag;
267 c->cmd_pointer = old;
268 c->alias_chain = old->aliases;
273 /* Like add_cmd but adds an element for a command prefix:
274 a name that should be followed by a subcommand to be looked up
275 in another command list. PREFIXLIST should be the address
276 of the variable containing that list. */
278 struct cmd_list_element *
279 add_prefix_cmd (char *name, enum command_class class, void (*fun) (char *, int),
280 char *doc, struct cmd_list_element **prefixlist,
281 char *prefixname, int allow_unknown,
282 struct cmd_list_element **list)
284 struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
285 c->prefixlist = prefixlist;
286 c->prefixname = prefixname;
287 c->allow_unknown = allow_unknown;
291 /* Like add_prefix_cmd but sets the abbrev_flag on the new command. */
293 struct cmd_list_element *
294 add_abbrev_prefix_cmd (char *name, enum command_class class,
295 void (*fun) (char *, int), char *doc,
296 struct cmd_list_element **prefixlist, char *prefixname,
297 int allow_unknown, struct cmd_list_element **list)
299 struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
300 c->prefixlist = prefixlist;
301 c->prefixname = prefixname;
302 c->allow_unknown = allow_unknown;
307 /* This is an empty "cfunc". */
309 not_just_help_class_command (char *args, int from_tty)
313 /* This is an empty "sfunc". */
314 static void empty_sfunc (char *, int, struct cmd_list_element *);
317 empty_sfunc (char *args, int from_tty, struct cmd_list_element *c)
321 /* Add element named NAME to command list LIST (the list for set/show
322 or some sublist thereof).
323 TYPE is set_cmd or show_cmd.
324 CLASS is as in add_cmd.
325 VAR_TYPE is the kind of thing we are setting.
326 VAR is address of the variable being controlled by this command.
327 DOC is the documentation string. */
329 static struct cmd_list_element *
330 add_set_or_show_cmd (char *name,
332 enum command_class class,
336 struct cmd_list_element **list)
338 struct cmd_list_element *c = add_cmd (name, class, NULL, doc, list);
339 gdb_assert (type == set_cmd || type == show_cmd);
341 c->var_type = var_type;
343 /* This needs to be something besides NULL so that this isn't
344 treated as a help class. */
345 set_cmd_sfunc (c, empty_sfunc);
349 /* Add element named NAME to both the command SET_LIST and SHOW_LIST.
350 CLASS is as in add_cmd. VAR_TYPE is the kind of thing we are
351 setting. VAR is address of the variable being controlled by this
352 command. SET_FUNC and SHOW_FUNC are the callback functions (if
353 non-NULL). SET_DOC, SHOW_DOC and HELP_DOC are the documentation
354 strings. PRINT the format string to print the value. SET_RESULT
355 and SHOW_RESULT, if not NULL, are set to the resulting command
359 add_setshow_cmd_full (char *name,
360 enum command_class class,
361 var_types var_type, void *var,
362 const char *set_doc, const char *show_doc,
363 const char *help_doc,
364 cmd_sfunc_ftype *set_func,
365 show_value_ftype *show_func,
366 struct cmd_list_element **set_list,
367 struct cmd_list_element **show_list,
368 struct cmd_list_element **set_result,
369 struct cmd_list_element **show_result)
371 struct cmd_list_element *set;
372 struct cmd_list_element *show;
376 if (help_doc != NULL)
378 full_set_doc = xstrprintf ("%s\n%s", set_doc, help_doc);
379 full_show_doc = xstrprintf ("%s\n%s", show_doc, help_doc);
383 full_set_doc = xstrdup (set_doc);
384 full_show_doc = xstrdup (show_doc);
386 set = add_set_or_show_cmd (name, set_cmd, class, var_type, var,
387 full_set_doc, set_list);
388 if (set_func != NULL)
389 set_cmd_sfunc (set, set_func);
390 show = add_set_or_show_cmd (name, show_cmd, class, var_type, var,
391 full_show_doc, show_list);
392 show->show_value_func = show_func;
394 if (set_result != NULL)
396 if (show_result != NULL)
400 /* Add element named NAME to command list LIST (the list for set or
401 some sublist thereof). CLASS is as in add_cmd. ENUMLIST is a list
402 of strings which may follow NAME. VAR is address of the variable
403 which will contain the matching string (from ENUMLIST). */
406 add_setshow_enum_cmd (char *name,
407 enum command_class class,
408 const char *enumlist[],
411 const char *show_doc,
412 const char *help_doc,
413 cmd_sfunc_ftype *set_func,
414 show_value_ftype *show_func,
415 struct cmd_list_element **set_list,
416 struct cmd_list_element **show_list)
418 struct cmd_list_element *c;
419 add_setshow_cmd_full (name, class, var_enum, var,
420 set_doc, show_doc, help_doc,
427 /* Add an auto-boolean command named NAME to both the set and show
428 command list lists. CLASS is as in add_cmd. VAR is address of the
429 variable which will contain the value. DOC is the documentation
430 string. FUNC is the corresponding callback. */
432 add_setshow_auto_boolean_cmd (char *name,
433 enum command_class class,
434 enum auto_boolean *var,
435 const char *set_doc, const char *show_doc,
436 const char *help_doc,
437 cmd_sfunc_ftype *set_func,
438 show_value_ftype *show_func,
439 struct cmd_list_element **set_list,
440 struct cmd_list_element **show_list)
442 static const char *auto_boolean_enums[] = { "on", "off", "auto", NULL };
443 struct cmd_list_element *c;
444 add_setshow_cmd_full (name, class, var_auto_boolean, var,
445 set_doc, show_doc, help_doc,
449 c->enums = auto_boolean_enums;
452 /* Add element named NAME to both the set and show command LISTs (the
453 list for set/show or some sublist thereof). CLASS is as in
454 add_cmd. VAR is address of the variable which will contain the
455 value. SET_DOC and SHOW_DOC are the documentation strings. */
457 add_setshow_boolean_cmd (char *name, enum command_class class, int *var,
458 const char *set_doc, const char *show_doc,
459 const char *help_doc,
460 cmd_sfunc_ftype *set_func,
461 show_value_ftype *show_func,
462 struct cmd_list_element **set_list,
463 struct cmd_list_element **show_list)
465 static const char *boolean_enums[] = { "on", "off", NULL };
466 struct cmd_list_element *c;
467 add_setshow_cmd_full (name, class, var_boolean, var,
468 set_doc, show_doc, help_doc,
472 c->enums = boolean_enums;
475 /* Add element named NAME to both the set and show command LISTs (the
476 list for set/show or some sublist thereof). */
478 add_setshow_filename_cmd (char *name, enum command_class class,
480 const char *set_doc, const char *show_doc,
481 const char *help_doc,
482 cmd_sfunc_ftype *set_func,
483 show_value_ftype *show_func,
484 struct cmd_list_element **set_list,
485 struct cmd_list_element **show_list)
487 struct cmd_list_element *set_result;
488 add_setshow_cmd_full (name, class, var_filename, var,
489 set_doc, show_doc, help_doc,
493 set_cmd_completer (set_result, filename_completer);
496 /* Add element named NAME to both the set and show command LISTs (the
497 list for set/show or some sublist thereof). */
499 add_setshow_string_cmd (char *name, enum command_class class,
501 const char *set_doc, const char *show_doc,
502 const char *help_doc,
503 cmd_sfunc_ftype *set_func,
504 show_value_ftype *show_func,
505 struct cmd_list_element **set_list,
506 struct cmd_list_element **show_list)
508 add_setshow_cmd_full (name, class, var_string, var,
509 set_doc, show_doc, help_doc,
515 /* Add element named NAME to both the set and show command LISTs (the
516 list for set/show or some sublist thereof). */
518 add_setshow_string_noescape_cmd (char *name, enum command_class class,
520 const char *set_doc, const char *show_doc,
521 const char *help_doc,
522 cmd_sfunc_ftype *set_func,
523 show_value_ftype *show_func,
524 struct cmd_list_element **set_list,
525 struct cmd_list_element **show_list)
527 add_setshow_cmd_full (name, class, var_string_noescape, var,
528 set_doc, show_doc, help_doc,
534 /* Add element named NAME to both the set and show command LISTs (the
535 list for set/show or some sublist thereof). */
537 add_setshow_optional_filename_cmd (char *name, enum command_class class,
539 const char *set_doc, const char *show_doc,
540 const char *help_doc,
541 cmd_sfunc_ftype *set_func,
542 show_value_ftype *show_func,
543 struct cmd_list_element **set_list,
544 struct cmd_list_element **show_list)
546 struct cmd_list_element *set_result;
548 add_setshow_cmd_full (name, class, var_optional_filename, var,
549 set_doc, show_doc, help_doc,
554 set_cmd_completer (set_result, filename_completer);
558 /* Add element named NAME to both the set and show command LISTs (the
559 list for set/show or some sublist thereof). CLASS is as in
560 add_cmd. VAR is address of the variable which will contain the
561 value. SET_DOC and SHOW_DOC are the documentation strings. */
563 add_setshow_integer_cmd (char *name, enum command_class class,
565 const char *set_doc, const char *show_doc,
566 const char *help_doc,
567 cmd_sfunc_ftype *set_func,
568 show_value_ftype *show_func,
569 struct cmd_list_element **set_list,
570 struct cmd_list_element **show_list)
572 add_setshow_cmd_full (name, class, var_integer, var,
573 set_doc, show_doc, help_doc,
579 /* Add element named NAME to both the set and show command LISTs (the
580 list for set/show or some sublist thereof). CLASS is as in
581 add_cmd. VAR is address of the variable which will contain the
582 value. SET_DOC and SHOW_DOC are the documentation strings. */
584 add_setshow_uinteger_cmd (char *name, enum command_class class,
586 const char *set_doc, const char *show_doc,
587 const char *help_doc,
588 cmd_sfunc_ftype *set_func,
589 show_value_ftype *show_func,
590 struct cmd_list_element **set_list,
591 struct cmd_list_element **show_list)
593 add_setshow_cmd_full (name, class, var_uinteger, var,
594 set_doc, show_doc, help_doc,
600 /* Add element named NAME to both the set and show command LISTs (the
601 list for set/show or some sublist thereof). CLASS is as in
602 add_cmd. VAR is address of the variable which will contain the
603 value. SET_DOC and SHOW_DOC are the documentation strings. */
605 add_setshow_zinteger_cmd (char *name, enum command_class class,
607 const char *set_doc, const char *show_doc,
608 const char *help_doc,
609 cmd_sfunc_ftype *set_func,
610 show_value_ftype *show_func,
611 struct cmd_list_element **set_list,
612 struct cmd_list_element **show_list)
614 add_setshow_cmd_full (name, class, var_zinteger, var,
615 set_doc, show_doc, help_doc,
621 /* Add element named NAME to both the set and show command LISTs (the
622 list for set/show or some sublist thereof). CLASS is as in
623 add_cmd. VAR is address of the variable which will contain the
624 value. SET_DOC and SHOW_DOC are the documentation strings. */
626 add_setshow_zuinteger_cmd (char *name, enum command_class class,
628 const char *set_doc, const char *show_doc,
629 const char *help_doc,
630 cmd_sfunc_ftype *set_func,
631 show_value_ftype *show_func,
632 struct cmd_list_element **set_list,
633 struct cmd_list_element **show_list)
635 add_setshow_cmd_full (name, class, var_zuinteger, var,
636 set_doc, show_doc, help_doc,
642 /* Remove the command named NAME from the command list. Return the
643 list commands which were aliased to the deleted command. If the
644 command had no aliases, return NULL. The various *HOOKs are set to
645 the pre- and post-hook commands for the deleted command. If the
646 command does not have a hook, the corresponding out parameter is
649 static struct cmd_list_element *
650 delete_cmd (char *name, struct cmd_list_element **list,
651 struct cmd_list_element **prehook,
652 struct cmd_list_element **prehookee,
653 struct cmd_list_element **posthook,
654 struct cmd_list_element **posthookee)
656 struct cmd_list_element *iter;
657 struct cmd_list_element **previous_chain_ptr;
658 struct cmd_list_element *aliases = NULL;
664 previous_chain_ptr = list;
666 for (iter = *previous_chain_ptr; iter; iter = *previous_chain_ptr)
668 if (strcmp (iter->name, name) == 0)
671 iter->destroyer (iter, iter->context);
672 if (iter->hookee_pre)
673 iter->hookee_pre->hook_pre = 0;
674 *prehook = iter->hook_pre;
675 *prehookee = iter->hookee_pre;
676 if (iter->hookee_post)
677 iter->hookee_post->hook_post = 0;
678 *posthook = iter->hook_post;
679 *posthookee = iter->hookee_post;
681 /* Update the link. */
682 *previous_chain_ptr = iter->next;
684 aliases = iter->aliases;
686 /* If this command was an alias, remove it from the list of
688 if (iter->cmd_pointer)
690 struct cmd_list_element **prevp = &iter->cmd_pointer->aliases;
691 struct cmd_list_element *a = *prevp;
695 prevp = &a->alias_chain;
698 *prevp = iter->alias_chain;
703 /* We won't see another command with the same name. */
707 previous_chain_ptr = &iter->next;
713 /* Shorthands to the commands above. */
715 /* Add an element to the list of info subcommands. */
717 struct cmd_list_element *
718 add_info (char *name, void (*fun) (char *, int), char *doc)
720 return add_cmd (name, no_class, fun, doc, &infolist);
723 /* Add an alias to the list of info subcommands. */
725 struct cmd_list_element *
726 add_info_alias (char *name, char *oldname, int abbrev_flag)
728 return add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
731 /* Add an element to the list of commands. */
733 struct cmd_list_element *
734 add_com (char *name, enum command_class class, void (*fun) (char *, int),
737 return add_cmd (name, class, fun, doc, &cmdlist);
740 /* Add an alias or abbreviation command to the list of commands. */
742 struct cmd_list_element *
743 add_com_alias (char *name, char *oldname, enum command_class class,
746 return add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
749 /* Recursively walk the commandlist structures, and print out the
750 documentation of commands that match our regex in either their
751 name, or their documentation.
754 apropos_cmd (struct ui_file *stream, struct cmd_list_element *commandlist,
755 struct re_pattern_buffer *regex, char *prefix)
757 struct cmd_list_element *c;
758 int returnvalue=1; /*Needed to avoid double printing*/
759 /* Walk through the commands */
760 for (c=commandlist;c;c=c->next)
764 /* Try to match against the name*/
765 returnvalue=re_search(regex,c->name,strlen(c->name),0,strlen(c->name),NULL);
766 if (returnvalue >= 0)
768 print_help_for_command (c, prefix,
769 0 /* don't recurse */, stream);
772 if (c->doc != NULL && returnvalue != 0)
774 /* Try to match against documentation */
775 if (re_search(regex,c->doc,strlen(c->doc),0,strlen(c->doc),NULL) >=0)
777 print_help_for_command (c, prefix,
778 0 /* don't recurse */, stream);
781 /* Check if this command has subcommands */
782 if (c->prefixlist != NULL)
784 /* Recursively call ourselves on the subcommand list,
785 passing the right prefix in.
787 apropos_cmd (stream,*c->prefixlist,regex,c->prefixname);
792 /* This command really has to deal with two things:
793 * 1) I want documentation on *this string* (usually called by
794 * "help commandname").
795 * 2) I want documentation on *this list* (usually called by
796 * giving a command that requires subcommands. Also called by saying
799 * I am going to split this into two seperate comamnds, help_cmd and
804 help_cmd (char *command, struct ui_file *stream)
806 struct cmd_list_element *c;
807 extern struct cmd_list_element *cmdlist;
811 help_list (cmdlist, "", all_classes, stream);
815 if (strcmp (command, "all") == 0)
821 c = lookup_cmd (&command, cmdlist, "", 0, 0);
826 /* There are three cases here.
827 If c->prefixlist is nonzero, we have a prefix command.
828 Print its documentation, then list its subcommands.
830 If c->func is non NULL, we really have a command. Print its
831 documentation and return.
833 If c->func is NULL, we have a class name. Print its
834 documentation (as if it were a command) and then set class to the
835 number of this class so that the commands in the class will be
838 fputs_filtered (c->doc, stream);
839 fputs_filtered ("\n", stream);
841 if (c->prefixlist == 0 && c->func != NULL)
843 fprintf_filtered (stream, "\n");
845 /* If this is a prefix command, print it's subcommands */
847 help_list (*c->prefixlist, c->prefixname, all_commands, stream);
849 /* If this is a class name, print all of the commands in the class */
851 help_list (cmdlist, "", c->class, stream);
853 if (c->hook_pre || c->hook_post)
854 fprintf_filtered (stream,
855 "\nThis command has a hook (or hooks) defined:\n");
858 fprintf_filtered (stream,
859 "\tThis command is run after : %s (pre hook)\n",
862 fprintf_filtered (stream,
863 "\tThis command is run before : %s (post hook)\n",
868 * Get a specific kind of help on a command list.
871 * CMDTYPE is the prefix to use in the title string.
872 * CLASS is the class with which to list the nodes of this list (see
873 * documentation for help_cmd_list below), As usual, ALL_COMMANDS for
874 * everything, ALL_CLASSES for just classes, and non-negative for only things
875 * in a specific class.
876 * and STREAM is the output stream on which to print things.
877 * If you call this routine with a class >= 0, it recurses.
880 help_list (struct cmd_list_element *list, char *cmdtype,
881 enum command_class class, struct ui_file *stream)
884 char *cmdtype1, *cmdtype2;
886 /* If CMDTYPE is "foo ", CMDTYPE1 gets " foo" and CMDTYPE2 gets "foo sub" */
887 len = strlen (cmdtype);
888 cmdtype1 = (char *) alloca (len + 1);
890 cmdtype2 = (char *) alloca (len + 4);
895 strncpy (cmdtype1 + 1, cmdtype, len - 1);
897 strncpy (cmdtype2, cmdtype, len - 1);
898 strcpy (cmdtype2 + len - 1, " sub");
901 if (class == all_classes)
902 fprintf_filtered (stream, "List of classes of %scommands:\n\n", cmdtype2);
904 fprintf_filtered (stream, "List of %scommands:\n\n", cmdtype2);
906 help_cmd_list (list, class, cmdtype, (int) class >= 0, stream);
908 if (class == all_classes)
910 fprintf_filtered (stream, "\n\
911 Type \"help%s\" followed by a class name for a list of commands in ",
914 fprintf_filtered (stream, "that class.");
916 fprintf_filtered (stream, "\n\
917 Type \"help all\" for the list of all commands.");
920 fprintf_filtered (stream, "\nType \"help%s\" followed by %scommand name ",
923 fputs_filtered ("for ", stream);
925 fputs_filtered ("full ", stream);
927 fputs_filtered ("documentation.\n", stream);
928 fputs_filtered ("Type \"apropos word\" to search "
929 "for commands related to \"word\".\n", stream);
930 fputs_filtered ("Command name abbreviations are allowed if unambiguous.\n",
935 help_all (struct ui_file *stream)
937 struct cmd_list_element *c;
938 extern struct cmd_list_element *cmdlist;
939 int seen_unclassified = 0;
941 for (c = cmdlist; c; c = c->next)
945 /* If this is a class name, print all of the commands in the class */
949 fprintf_filtered (stream, "\nCommand class: %s\n\n", c->name);
950 help_cmd_list (cmdlist, c->class, "", 1, stream);
954 /* While it's expected that all commands are in some class,
955 as a safety measure, we'll print commands outside of any
958 for (c = cmdlist; c; c = c->next)
963 if (c->class == no_class)
965 if (!seen_unclassified)
967 fprintf_filtered (stream, "\nUnclassified commands\n\n");
968 seen_unclassified = 1;
970 print_help_for_command (c, "", 1, stream);
976 /* Print only the first line of STR on STREAM. */
978 print_doc_line (struct ui_file *stream, char *str)
980 static char *line_buffer = 0;
981 static int line_size;
987 line_buffer = (char *) xmalloc (line_size);
991 while (*p && *p != '\n' && *p != '.' && *p != ',')
993 if (p - str > line_size - 1)
995 line_size = p - str + 1;
997 line_buffer = (char *) xmalloc (line_size);
999 strncpy (line_buffer, str, p - str);
1000 line_buffer[p - str] = '\0';
1001 if (islower (line_buffer[0]))
1002 line_buffer[0] = toupper (line_buffer[0]);
1003 ui_out_text (uiout, line_buffer);
1006 /* Print one-line help for command C.
1007 If RECURSE is non-zero, also print one-line descriptions
1008 of all prefixed subcommands. */
1010 print_help_for_command (struct cmd_list_element *c, char *prefix, int recurse,
1011 struct ui_file *stream)
1013 fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
1014 print_doc_line (stream, c->doc);
1015 fputs_filtered ("\n", stream);
1018 && c->prefixlist != 0
1019 && c->abbrev_flag == 0)
1020 /* Subcommands of a prefix command typically have 'all_commands'
1021 as class. If we pass CLASS to recursive invocation,
1022 most often we won't see anything. */
1023 help_cmd_list (*c->prefixlist, all_commands, c->prefixname, 1, stream);
1027 * Implement a help command on command list LIST.
1028 * RECURSE should be non-zero if this should be done recursively on
1029 * all sublists of LIST.
1030 * PREFIX is the prefix to print before each command name.
1031 * STREAM is the stream upon which the output should be written.
1033 * A non-negative class number to list only commands in that
1035 * ALL_COMMANDS to list all commands in list.
1036 * ALL_CLASSES to list all classes in list.
1038 * Note that RECURSE will be active on *all* sublists, not just the
1039 * ones selected by the criteria above (ie. the selection mechanism
1040 * is at the low level, not the high-level).
1043 help_cmd_list (struct cmd_list_element *list, enum command_class class,
1044 char *prefix, int recurse, struct ui_file *stream)
1046 struct cmd_list_element *c;
1048 for (c = list; c; c = c->next)
1050 if (c->abbrev_flag == 0 &&
1051 (class == all_commands
1052 || (class == all_classes && c->func == NULL)
1053 || (class == c->class && c->func != NULL)))
1055 print_help_for_command (c, prefix, recurse, stream);
1057 else if (c->abbrev_flag == 0 && recurse
1058 && class == class_user && c->prefixlist != NULL)
1059 /* User-defined commands may be subcommands. */
1060 help_cmd_list (*c->prefixlist, class, c->prefixname, recurse, stream);
1065 /* Search the input clist for 'command'. Return the command if
1066 found (or NULL if not), and return the number of commands
1069 static struct cmd_list_element *
1070 find_cmd (char *command, int len, struct cmd_list_element *clist,
1071 int ignore_help_classes, int *nfound)
1073 struct cmd_list_element *found, *c;
1075 found = (struct cmd_list_element *) NULL;
1077 for (c = clist; c; c = c->next)
1078 if (!strncmp (command, c->name, len)
1079 && (!ignore_help_classes || c->func))
1083 if (c->name[len] == '\0')
1093 find_command_name_length (const char *text)
1095 const char *p = text;
1097 /* Treating underscores as part of command words is important
1098 so that "set args_foo()" doesn't get interpreted as
1099 "set args _foo()". */
1100 /* Some characters are only used for TUI specific commands. However, they
1101 are always allowed for the sake of consistency.
1102 The XDB compatibility characters are only allowed when using the right
1103 mode because they clash with other GDB commands - specifically '/' is
1104 used as a suffix for print, examine and display.
1105 Note that this is larger than the character set allowed when creating
1106 user-defined commands. */
1107 while (isalnum (*p) || *p == '-' || *p == '_' ||
1108 /* Characters used by TUI specific commands. */
1109 *p == '+' || *p == '<' || *p == '>' || *p == '$' ||
1110 /* Characters used for XDB compatibility. */
1111 (xdb_commands && (*p == '!' || *p == '/' || *p == '?')))
1117 /* This routine takes a line of TEXT and a CLIST in which to start the
1118 lookup. When it returns it will have incremented the text pointer past
1119 the section of text it matched, set *RESULT_LIST to point to the list in
1120 which the last word was matched, and will return a pointer to the cmd
1121 list element which the text matches. It will return NULL if no match at
1122 all was possible. It will return -1 (cast appropriately, ick) if ambigous
1123 matches are possible; in this case *RESULT_LIST will be set to point to
1124 the list in which there are ambiguous choices (and *TEXT will be set to
1125 the ambiguous text string).
1127 If the located command was an abbreviation, this routine returns the base
1128 command of the abbreviation.
1130 It does no error reporting whatsoever; control will always return
1131 to the superior routine.
1133 In the case of an ambiguous return (-1), *RESULT_LIST will be set to point
1134 at the prefix_command (ie. the best match) *or* (special case) will be NULL
1135 if no prefix command was ever found. For example, in the case of "info a",
1136 "info" matches without ambiguity, but "a" could be "args" or "address", so
1137 *RESULT_LIST is set to the cmd_list_element for "info". So in this case
1138 RESULT_LIST should not be interpeted as a pointer to the beginning of a
1139 list; it simply points to a specific command. In the case of an ambiguous
1140 return *TEXT is advanced past the last non-ambiguous prefix (e.g.
1141 "info t" can be "info types" or "info target"; upon return *TEXT has been
1142 advanced past "info ").
1144 If RESULT_LIST is NULL, don't set *RESULT_LIST (but don't otherwise
1145 affect the operation).
1147 This routine does *not* modify the text pointed to by TEXT.
1149 If IGNORE_HELP_CLASSES is nonzero, ignore any command list elements which
1150 are actually help classes rather than commands (i.e. the function field of
1151 the struct cmd_list_element is NULL). */
1153 struct cmd_list_element *
1154 lookup_cmd_1 (char **text, struct cmd_list_element *clist,
1155 struct cmd_list_element **result_list, int ignore_help_classes)
1158 int len, tmp, nfound;
1159 struct cmd_list_element *found, *c;
1162 while (**text == ' ' || **text == '\t')
1165 /* Identify the name of the command. */
1166 len = find_command_name_length (*text);
1168 /* If nothing but whitespace, return 0. */
1172 /* *text and p now bracket the first command word to lookup (and
1173 it's length is len). We copy this into a local temporary */
1176 command = (char *) alloca (len + 1);
1177 memcpy (command, *text, len);
1178 command[len] = '\0';
1183 found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
1186 ** We didn't find the command in the entered case, so lower case it
1187 ** and search again.
1189 if (!found || nfound == 0)
1191 for (tmp = 0; tmp < len; tmp++)
1193 char x = command[tmp];
1194 command[tmp] = isupper (x) ? tolower (x) : x;
1196 found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
1199 /* If nothing matches, we have a simple failure. */
1205 if (result_list != NULL)
1206 /* Will be modified in calling routine
1207 if we know what the prefix command is. */
1209 return (struct cmd_list_element *) -1; /* Ambiguous. */
1212 /* We've matched something on this list. Move text pointer forward. */
1216 if (found->cmd_pointer)
1218 /* We drop the alias (abbreviation) in favor of the command it is
1219 pointing to. If the alias is deprecated, though, we need to
1220 warn the user about it before we drop it. Note that while we
1221 are warning about the alias, we may also warn about the command
1222 itself and we will adjust the appropriate DEPRECATED_WARN_USER
1225 if (found->flags & DEPRECATED_WARN_USER)
1226 deprecated_cmd_warning (&line);
1227 found = found->cmd_pointer;
1229 /* If we found a prefix command, keep looking. */
1231 if (found->prefixlist)
1233 c = lookup_cmd_1 (text, *found->prefixlist, result_list,
1234 ignore_help_classes);
1237 /* Didn't find anything; this is as far as we got. */
1238 if (result_list != NULL)
1239 *result_list = clist;
1242 else if (c == (struct cmd_list_element *) -1)
1244 /* We've gotten this far properly, but the next step
1245 is ambiguous. We need to set the result list to the best
1246 we've found (if an inferior hasn't already set it). */
1247 if (result_list != NULL)
1249 /* This used to say *result_list = *found->prefixlist
1250 If that was correct, need to modify the documentation
1251 at the top of this function to clarify what is supposed
1253 *result_list = found;
1264 if (result_list != NULL)
1265 *result_list = clist;
1270 /* All this hair to move the space to the front of cmdtype */
1273 undef_cmd_error (char *cmdtype, char *q)
1275 error (_("Undefined %scommand: \"%s\". Try \"help%s%.*s\"."),
1278 *cmdtype ? " " : "",
1279 (int) strlen (cmdtype) - 1,
1283 /* Look up the contents of *LINE as a command in the command list LIST.
1284 LIST is a chain of struct cmd_list_element's.
1285 If it is found, return the struct cmd_list_element for that command
1286 and update *LINE to point after the command name, at the first argument.
1287 If not found, call error if ALLOW_UNKNOWN is zero
1288 otherwise (or if error returns) return zero.
1289 Call error if specified command is ambiguous,
1290 unless ALLOW_UNKNOWN is negative.
1291 CMDTYPE precedes the word "command" in the error message.
1293 If INGNORE_HELP_CLASSES is nonzero, ignore any command list
1294 elements which are actually help classes rather than commands (i.e.
1295 the function field of the struct cmd_list_element is 0). */
1297 struct cmd_list_element *
1298 lookup_cmd (char **line, struct cmd_list_element *list, char *cmdtype,
1299 int allow_unknown, int ignore_help_classes)
1301 struct cmd_list_element *last_list = 0;
1302 struct cmd_list_element *c;
1304 /* Note: Do not remove trailing whitespace here because this
1305 would be wrong for complete_command. Jim Kingdon */
1308 error (_("Lack of needed %scommand"), cmdtype);
1310 c = lookup_cmd_1 (line, list, &last_list, ignore_help_classes);
1317 int len = find_command_name_length (*line);
1319 q = (char *) alloca (len + 1);
1320 strncpy (q, *line, len);
1322 undef_cmd_error (cmdtype, q);
1327 else if (c == (struct cmd_list_element *) -1)
1329 /* Ambigous. Local values should be off prefixlist or called
1331 int local_allow_unknown = (last_list ? last_list->allow_unknown :
1333 char *local_cmdtype = last_list ? last_list->prefixname : cmdtype;
1334 struct cmd_list_element *local_list =
1335 (last_list ? *(last_list->prefixlist) : list);
1337 if (local_allow_unknown < 0)
1340 return last_list; /* Found something. */
1342 return 0; /* Found nothing. */
1346 /* Report as error. */
1351 ((*line)[amb_len] && (*line)[amb_len] != ' '
1352 && (*line)[amb_len] != '\t');
1357 for (c = local_list; c; c = c->next)
1358 if (!strncmp (*line, c->name, amb_len))
1360 if (strlen (ambbuf) + strlen (c->name) + 6 < (int) sizeof ambbuf)
1362 if (strlen (ambbuf))
1363 strcat (ambbuf, ", ");
1364 strcat (ambbuf, c->name);
1368 strcat (ambbuf, "..");
1372 error (_("Ambiguous %scommand \"%s\": %s."), local_cmdtype,
1374 return 0; /* lint */
1379 /* We've got something. It may still not be what the caller
1380 wants (if this command *needs* a subcommand). */
1381 while (**line == ' ' || **line == '\t')
1384 if (c->prefixlist && **line && !c->allow_unknown)
1385 undef_cmd_error (c->prefixname, *line);
1387 /* Seems to be what he wants. Return it. */
1393 /* We are here presumably because an alias or command in *TEXT is
1394 deprecated and a warning message should be generated. This function
1395 decodes *TEXT and potentially generates a warning message as outlined
1398 Example for 'set endian big' which has a fictitious alias 'seb'.
1400 If alias wasn't used in *TEXT, and the command is deprecated:
1401 "warning: 'set endian big' is deprecated."
1403 If alias was used, and only the alias is deprecated:
1404 "warning: 'seb' an alias for the command 'set endian big' is deprecated."
1406 If alias was used and command is deprecated (regardless of whether the
1407 alias itself is deprecated:
1409 "warning: 'set endian big' (seb) is deprecated."
1411 After the message has been sent, clear the appropriate flags in the
1412 command and/or the alias so the user is no longer bothered.
1416 deprecated_cmd_warning (char **text)
1418 struct cmd_list_element *alias = NULL;
1419 struct cmd_list_element *prefix_cmd = NULL;
1420 struct cmd_list_element *cmd = NULL;
1421 struct cmd_list_element *c;
1424 if (!lookup_cmd_composition (*text, &alias, &prefix_cmd, &cmd))
1425 /* return if text doesn't evaluate to a command */
1428 if (!((alias ? (alias->flags & DEPRECATED_WARN_USER) : 0)
1429 || (cmd->flags & DEPRECATED_WARN_USER) ) )
1430 /* return if nothing is deprecated */
1433 printf_filtered ("Warning:");
1435 if (alias && !(cmd->flags & CMD_DEPRECATED))
1436 printf_filtered (" '%s', an alias for the", alias->name);
1438 printf_filtered (" command '");
1441 printf_filtered ("%s", prefix_cmd->prefixname);
1443 printf_filtered ("%s", cmd->name);
1445 if (alias && (cmd->flags & CMD_DEPRECATED))
1446 printf_filtered ("' (%s) is deprecated.\n", alias->name);
1448 printf_filtered ("' is deprecated.\n");
1451 /* if it is only the alias that is deprecated, we want to indicate the
1452 new alias, otherwise we'll indicate the new command */
1454 if (alias && !(cmd->flags & CMD_DEPRECATED))
1456 if (alias->replacement)
1457 printf_filtered ("Use '%s'.\n\n", alias->replacement);
1459 printf_filtered ("No alternative known.\n\n");
1463 if (cmd->replacement)
1464 printf_filtered ("Use '%s'.\n\n", cmd->replacement);
1466 printf_filtered ("No alternative known.\n\n");
1469 /* We've warned you, now we'll keep quiet */
1471 alias->flags &= ~DEPRECATED_WARN_USER;
1473 cmd->flags &= ~DEPRECATED_WARN_USER;
1478 /* Look up the contents of LINE as a command in the command list 'cmdlist'.
1479 Return 1 on success, 0 on failure.
1481 If LINE refers to an alias, *alias will point to that alias.
1483 If LINE is a postfix command (i.e. one that is preceeded by a prefix
1484 command) set *prefix_cmd.
1486 Set *cmd to point to the command LINE indicates.
1488 If any of *alias, *prefix_cmd, or *cmd cannot be determined or do not
1489 exist, they are NULL when we return.
1493 lookup_cmd_composition (char *text,
1494 struct cmd_list_element **alias,
1495 struct cmd_list_element **prefix_cmd,
1496 struct cmd_list_element **cmd)
1499 int len, tmp, nfound;
1500 struct cmd_list_element *cur_list;
1501 struct cmd_list_element *prev_cmd;
1510 /* Go through as many command lists as we need to
1511 to find the command TEXT refers to. */
1515 while (*text == ' ' || *text == '\t')
1518 /* Identify the name of the command. */
1519 len = find_command_name_length (text);
1521 /* If nothing but whitespace, return. */
1525 /* text is the start of the first command word to lookup (and
1526 it's length is len). We copy this into a local temporary */
1528 command = (char *) alloca (len + 1);
1529 memcpy (command, text, len);
1530 command[len] = '\0';
1535 *cmd = find_cmd (command, len, cur_list, 1, &nfound);
1537 /* We didn't find the command in the entered case, so lower case it
1540 if (!*cmd || nfound == 0)
1542 for (tmp = 0; tmp < len; tmp++)
1544 char x = command[tmp];
1545 command[tmp] = isupper (x) ? tolower (x) : x;
1547 *cmd = find_cmd (command, len, cur_list, 1, &nfound);
1550 if (*cmd == (struct cmd_list_element *) -1)
1552 return 0; /* ambiguous */
1556 return 0; /* nothing found */
1559 if ((*cmd)->cmd_pointer)
1561 /* cmd was actually an alias, we note that an alias was used
1562 (by assigning *alais) and we set *cmd.
1565 *cmd = (*cmd)->cmd_pointer;
1567 *prefix_cmd = prev_cmd;
1569 if ((*cmd)->prefixlist)
1570 cur_list = *(*cmd)->prefixlist;
1578 /* Helper function for SYMBOL_COMPLETION_FUNCTION. */
1580 /* Return a vector of char pointers which point to the different
1581 possible completions in LIST of TEXT.
1583 WORD points in the same buffer as TEXT, and completions should be
1584 returned relative to this position. For example, suppose TEXT is "foo"
1585 and we want to complete to "foobar". If WORD is "oo", return
1586 "oobar"; if WORD is "baz/foo", return "baz/foobar". */
1589 complete_on_cmdlist (struct cmd_list_element *list, char *text, char *word)
1591 struct cmd_list_element *ptr;
1593 int sizeof_matchlist;
1595 int textlen = strlen (text);
1597 sizeof_matchlist = 10;
1598 matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
1601 for (ptr = list; ptr; ptr = ptr->next)
1602 if (!strncmp (ptr->name, text, textlen)
1603 && !ptr->abbrev_flag
1605 || ptr->prefixlist))
1607 if (matches == sizeof_matchlist)
1609 sizeof_matchlist *= 2;
1610 matchlist = (char **) xrealloc ((char *) matchlist,
1612 * sizeof (char *)));
1615 matchlist[matches] = (char *)
1616 xmalloc (strlen (word) + strlen (ptr->name) + 1);
1618 strcpy (matchlist[matches], ptr->name);
1619 else if (word > text)
1621 /* Return some portion of ptr->name. */
1622 strcpy (matchlist[matches], ptr->name + (word - text));
1626 /* Return some of text plus ptr->name. */
1627 strncpy (matchlist[matches], word, text - word);
1628 matchlist[matches][text - word] = '\0';
1629 strcat (matchlist[matches], ptr->name);
1641 matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
1642 * sizeof (char *)));
1643 matchlist[matches] = (char *) 0;
1649 /* Helper function for SYMBOL_COMPLETION_FUNCTION. */
1651 /* Return a vector of char pointers which point to the different
1652 possible completions in CMD of TEXT.
1654 WORD points in the same buffer as TEXT, and completions should be
1655 returned relative to this position. For example, suppose TEXT is "foo"
1656 and we want to complete to "foobar". If WORD is "oo", return
1657 "oobar"; if WORD is "baz/foo", return "baz/foobar". */
1660 complete_on_enum (const char *enumlist[],
1665 int sizeof_matchlist;
1667 int textlen = strlen (text);
1671 sizeof_matchlist = 10;
1672 matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
1675 for (i = 0; (name = enumlist[i]) != NULL; i++)
1676 if (strncmp (name, text, textlen) == 0)
1678 if (matches == sizeof_matchlist)
1680 sizeof_matchlist *= 2;
1681 matchlist = (char **) xrealloc ((char *) matchlist,
1683 * sizeof (char *)));
1686 matchlist[matches] = (char *)
1687 xmalloc (strlen (word) + strlen (name) + 1);
1689 strcpy (matchlist[matches], name);
1690 else if (word > text)
1692 /* Return some portion of name. */
1693 strcpy (matchlist[matches], name + (word - text));
1697 /* Return some of text plus name. */
1698 strncpy (matchlist[matches], word, text - word);
1699 matchlist[matches][text - word] = '\0';
1700 strcat (matchlist[matches], name);
1712 matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
1713 * sizeof (char *)));
1714 matchlist[matches] = (char *) 0;
1721 /* check function pointer */
1723 cmd_func_p (struct cmd_list_element *cmd)
1725 return (cmd->func != NULL);
1729 /* call the command function */
1731 cmd_func (struct cmd_list_element *cmd, char *args, int from_tty)
1733 if (cmd_func_p (cmd))
1734 (*cmd->func) (cmd, args, from_tty);
1736 error (_("Invalid command"));