1 /* Handle lists of commands, their decoding and documentation, for GDB.
3 Copyright 1986, 1989, 1990, 1991, 1998, 2000, 2001, 2002, 2004 Free
4 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 2 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, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
24 #include "gdb_regex.h"
25 #include "gdb_string.h"
26 #include "completer.h"
29 #include "cli/cli-cmds.h"
30 #include "cli/cli-decode.h"
33 #include "tui/tui.h" /* For tui_active et.al. */
36 #include "gdb_assert.h"
38 /* Prototypes for local functions */
40 static void undef_cmd_error (char *, char *);
42 static struct cmd_list_element *find_cmd (char *command,
44 struct cmd_list_element *clist,
45 int ignore_help_classes,
48 static void help_all (struct ui_file *stream);
50 /* Set the callback function for the specified command. For each both
51 the commands callback and func() are set. The latter set to a
52 bounce function (unless cfunc / sfunc is NULL that is). */
55 do_cfunc (struct cmd_list_element *c, char *args, int from_tty)
57 c->function.cfunc (args, from_tty); /* Ok. */
61 set_cmd_cfunc (struct cmd_list_element *cmd, cmd_cfunc_ftype *cfunc)
67 cmd->function.cfunc = cfunc; /* Ok. */
71 do_sfunc (struct cmd_list_element *c, char *args, int from_tty)
73 c->function.sfunc (args, from_tty, c); /* Ok. */
77 set_cmd_sfunc (struct cmd_list_element *cmd, cmd_sfunc_ftype *sfunc)
83 cmd->function.sfunc = sfunc; /* Ok. */
87 cmd_cfunc_eq (struct cmd_list_element *cmd,
88 void (*cfunc) (char *args, int from_tty))
90 return cmd->func == do_cfunc && cmd->function.cfunc == cfunc;
94 set_cmd_context (struct cmd_list_element *cmd, void *context)
96 cmd->context = context;
100 get_cmd_context (struct cmd_list_element *cmd)
106 cmd_type (struct cmd_list_element *cmd)
112 set_cmd_completer (struct cmd_list_element *cmd,
113 char **(*completer) (char *text, char *word))
115 cmd->completer = completer; /* Ok. */
119 /* Add element named NAME.
120 CLASS is the top level category into which commands are broken down
122 FUN should be the function to execute the command;
123 it will get a character string as argument, with leading
124 and trailing blanks already eliminated.
126 DOC is a documentation string for the command.
127 Its first line should be a complete sentence.
128 It should start with ? for a command that is an abbreviation
129 or with * for a command that most users don't need to know about.
131 Add this command to command list *LIST.
133 Returns a pointer to the added command (not necessarily the head
136 struct cmd_list_element *
137 add_cmd (char *name, enum command_class class, void (*fun) (char *, int),
138 char *doc, struct cmd_list_element **list)
140 struct cmd_list_element *c
141 = (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element));
142 struct cmd_list_element *p;
144 delete_cmd (name, list);
146 if (*list == NULL || strcmp ((*list)->name, name) >= 0)
154 while (p->next && strcmp (p->next->name, name) <= 0)
164 set_cmd_cfunc (c, fun);
165 set_cmd_context (c, NULL);
168 c->replacement = NULL;
169 c->pre_show_hook = NULL;
173 c->prefixlist = NULL;
174 c->prefixname = NULL;
175 c->allow_unknown = 0;
177 set_cmd_completer (c, make_symbol_completion_list);
178 c->type = not_set_cmd;
180 c->var_type = var_boolean;
182 c->user_commands = NULL;
183 c->hookee_pre = NULL;
184 c->hookee_post = NULL;
185 c->cmd_pointer = NULL;
190 /* Deprecates a command CMD.
191 REPLACEMENT is the name of the command which should be used in place
192 of this command, or NULL if no such command exists.
194 This function does not check to see if command REPLACEMENT exists
195 since gdb may not have gotten around to adding REPLACEMENT when this
198 Returns a pointer to the deprecated command. */
200 struct cmd_list_element *
201 deprecate_cmd (struct cmd_list_element *cmd, char *replacement)
203 cmd->flags |= (CMD_DEPRECATED | DEPRECATED_WARN_USER);
205 if (replacement != NULL)
206 cmd->replacement = replacement;
208 cmd->replacement = NULL;
213 struct cmd_list_element *
214 add_alias_cmd (char *name, char *oldname, enum command_class class,
215 int abbrev_flag, struct cmd_list_element **list)
217 /* Must do this since lookup_cmd tries to side-effect its first arg */
219 struct cmd_list_element *old;
220 struct cmd_list_element *c;
221 copied_name = (char *) alloca (strlen (oldname) + 1);
222 strcpy (copied_name, oldname);
223 old = lookup_cmd (&copied_name, *list, "", 1, 1);
227 delete_cmd (name, list);
231 c = add_cmd (name, class, NULL, old->doc, list);
232 /* NOTE: Both FUNC and all the FUNCTIONs need to be copied. */
234 c->function = old->function;
235 c->prefixlist = old->prefixlist;
236 c->prefixname = old->prefixname;
237 c->allow_unknown = old->allow_unknown;
238 c->abbrev_flag = abbrev_flag;
239 c->cmd_pointer = old;
243 /* Like add_cmd but adds an element for a command prefix:
244 a name that should be followed by a subcommand to be looked up
245 in another command list. PREFIXLIST should be the address
246 of the variable containing that list. */
248 struct cmd_list_element *
249 add_prefix_cmd (char *name, enum command_class class, void (*fun) (char *, int),
250 char *doc, struct cmd_list_element **prefixlist,
251 char *prefixname, int allow_unknown,
252 struct cmd_list_element **list)
254 struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
255 c->prefixlist = prefixlist;
256 c->prefixname = prefixname;
257 c->allow_unknown = allow_unknown;
261 /* Like add_prefix_cmd but sets the abbrev_flag on the new command. */
263 struct cmd_list_element *
264 add_abbrev_prefix_cmd (char *name, enum command_class class,
265 void (*fun) (char *, int), char *doc,
266 struct cmd_list_element **prefixlist, char *prefixname,
267 int allow_unknown, struct cmd_list_element **list)
269 struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
270 c->prefixlist = prefixlist;
271 c->prefixname = prefixname;
272 c->allow_unknown = allow_unknown;
277 /* This is an empty "cfunc". */
279 not_just_help_class_command (char *args, int from_tty)
283 /* This is an empty "sfunc". */
284 static void empty_sfunc (char *, int, struct cmd_list_element *);
287 empty_sfunc (char *args, int from_tty, struct cmd_list_element *c)
291 /* Add element named NAME to command list LIST (the list for set/show
292 or some sublist thereof).
293 TYPE is set_cmd or show_cmd.
294 CLASS is as in add_cmd.
295 VAR_TYPE is the kind of thing we are setting.
296 VAR is address of the variable being controlled by this command.
297 DOC is the documentation string. */
299 static struct cmd_list_element *
300 add_set_or_show_cmd (char *name,
302 enum command_class class,
306 struct cmd_list_element **list)
308 struct cmd_list_element *c = add_cmd (name, class, NULL, doc, list);
309 gdb_assert (type == set_cmd || type == show_cmd);
311 c->var_type = var_type;
313 /* This needs to be something besides NULL so that this isn't
314 treated as a help class. */
315 set_cmd_sfunc (c, empty_sfunc);
319 /* Add element named NAME to both the command SET_LIST and SHOW_LIST.
320 CLASS is as in add_cmd. VAR_TYPE is the kind of thing we are
321 setting. VAR is address of the variable being controlled by this
322 command. SET_FUNC and SHOW_FUNC are the callback functions (if
323 non-NULL). SET_DOC, SHOW_DOC and HELP_DOC are the documentation
324 strings. PRINT the format string to print the value. SET_RESULT
325 and SHOW_RESULT, if not NULL, are set to the resulting command
329 add_setshow_cmd_full (char *name,
330 enum command_class class,
331 var_types var_type, void *var,
332 const char *set_doc, const char *show_doc,
333 const char *help_doc,
334 cmd_sfunc_ftype *set_func,
335 show_value_ftype *show_func,
336 struct cmd_list_element **set_list,
337 struct cmd_list_element **show_list,
338 struct cmd_list_element **set_result,
339 struct cmd_list_element **show_result)
341 struct cmd_list_element *set;
342 struct cmd_list_element *show;
346 if (help_doc != NULL)
348 full_set_doc = xstrprintf ("%s\n%s", set_doc, help_doc);
349 full_show_doc = xstrprintf ("%s\n%s", show_doc, help_doc);
353 full_set_doc = xstrdup (set_doc);
354 full_show_doc = xstrdup (show_doc);
356 set = add_set_or_show_cmd (name, set_cmd, class, var_type, var,
357 full_set_doc, set_list);
358 if (set_func != NULL)
359 set_cmd_sfunc (set, set_func);
360 show = add_set_or_show_cmd (name, show_cmd, class, var_type, var,
361 full_show_doc, show_list);
362 show->show_value_func = show_func;
364 if (set_result != NULL)
366 if (show_result != NULL)
370 struct cmd_list_element *
371 add_set_cmd (char *name,
372 enum command_class class,
376 struct cmd_list_element **list)
378 return add_set_or_show_cmd (name, set_cmd, class, var_type, var, doc, list);
381 /* Add element named NAME to command list LIST (the list for set
382 or some sublist thereof).
383 CLASS is as in add_cmd.
384 ENUMLIST is a list of strings which may follow NAME.
385 VAR is address of the variable which will contain the matching string
387 DOC is the documentation string. */
389 struct cmd_list_element *
390 add_set_enum_cmd (char *name,
391 enum command_class class,
392 const char *enumlist[],
395 struct cmd_list_element **list)
397 struct cmd_list_element *c
398 = add_set_cmd (name, class, var_enum, var, doc, list);
404 /* Add element named NAME to command list LIST (the list for set or
405 some sublist thereof). CLASS is as in add_cmd. ENUMLIST is a list
406 of strings which may follow NAME. VAR is address of the variable
407 which will contain the matching string (from ENUMLIST). */
410 add_setshow_enum_cmd (char *name,
411 enum command_class class,
412 const char *enumlist[],
415 const char *show_doc,
416 const char *help_doc,
417 cmd_sfunc_ftype *set_func,
418 show_value_ftype *show_func,
419 struct cmd_list_element **set_list,
420 struct cmd_list_element **show_list)
422 struct cmd_list_element *c;
423 add_setshow_cmd_full (name, class, var_enum, var,
424 set_doc, show_doc, help_doc,
431 /* Add an auto-boolean command named NAME to both the set and show
432 command list lists. CLASS is as in add_cmd. VAR is address of the
433 variable which will contain the value. DOC is the documentation
434 string. FUNC is the corresponding callback. */
436 add_setshow_auto_boolean_cmd (char *name,
437 enum command_class class,
438 enum auto_boolean *var,
439 const char *set_doc, const char *show_doc,
440 const char *help_doc,
441 cmd_sfunc_ftype *set_func,
442 show_value_ftype *show_func,
443 struct cmd_list_element **set_list,
444 struct cmd_list_element **show_list)
446 static const char *auto_boolean_enums[] = { "on", "off", "auto", NULL };
447 struct cmd_list_element *c;
448 add_setshow_cmd_full (name, class, var_auto_boolean, var,
449 set_doc, show_doc, help_doc,
453 c->enums = auto_boolean_enums;
456 /* Add element named NAME to both the set and show command LISTs (the
457 list for set/show or some sublist thereof). CLASS is as in
458 add_cmd. VAR is address of the variable which will contain the
459 value. SET_DOC and SHOW_DOC are the documentation strings. */
461 add_setshow_boolean_cmd (char *name, enum command_class class, int *var,
462 const char *set_doc, const char *show_doc,
463 const char *help_doc,
464 cmd_sfunc_ftype *set_func,
465 show_value_ftype *show_func,
466 struct cmd_list_element **set_list,
467 struct cmd_list_element **show_list)
469 static const char *boolean_enums[] = { "on", "off", NULL };
470 struct cmd_list_element *c;
471 add_setshow_cmd_full (name, class, var_boolean, var,
472 set_doc, show_doc, help_doc,
476 c->enums = boolean_enums;
479 /* Add element named NAME to both the set and show command LISTs (the
480 list for set/show or some sublist thereof). */
482 add_setshow_filename_cmd (char *name, enum command_class class,
484 const char *set_doc, const char *show_doc,
485 const char *help_doc,
486 cmd_sfunc_ftype *set_func,
487 show_value_ftype *show_func,
488 struct cmd_list_element **set_list,
489 struct cmd_list_element **show_list)
491 struct cmd_list_element *set_result;
492 add_setshow_cmd_full (name, class, var_filename, var,
493 set_doc, show_doc, help_doc,
497 set_cmd_completer (set_result, filename_completer);
500 /* Add element named NAME to both the set and show command LISTs (the
501 list for set/show or some sublist thereof). */
503 add_setshow_string_cmd (char *name, enum command_class class,
505 const char *set_doc, const char *show_doc,
506 const char *help_doc,
507 cmd_sfunc_ftype *set_func,
508 show_value_ftype *show_func,
509 struct cmd_list_element **set_list,
510 struct cmd_list_element **show_list)
512 add_setshow_cmd_full (name, class, var_string, var,
513 set_doc, show_doc, help_doc,
519 /* Add element named NAME to both the set and show command LISTs (the
520 list for set/show or some sublist thereof). */
522 add_setshow_string_noescape_cmd (char *name, enum command_class class,
524 const char *set_doc, const char *show_doc,
525 const char *help_doc,
526 cmd_sfunc_ftype *set_func,
527 show_value_ftype *show_func,
528 struct cmd_list_element **set_list,
529 struct cmd_list_element **show_list)
531 add_setshow_cmd_full (name, class, var_string_noescape, var,
532 set_doc, show_doc, help_doc,
538 /* Add element named NAME to both the set and show command LISTs (the
539 list for set/show or some sublist thereof). CLASS is as in
540 add_cmd. VAR is address of the variable which will contain the
541 value. SET_DOC and SHOW_DOC are the documentation strings. */
543 add_setshow_uinteger_cmd (char *name, enum command_class class,
545 const char *set_doc, const char *show_doc,
546 const char *help_doc,
547 cmd_sfunc_ftype *set_func,
548 show_value_ftype *show_func,
549 struct cmd_list_element **set_list,
550 struct cmd_list_element **show_list)
552 add_setshow_cmd_full (name, class, var_uinteger, var,
553 set_doc, show_doc, help_doc,
559 /* Add element named NAME to both the set and show command LISTs (the
560 list for set/show or some sublist thereof). CLASS is as in
561 add_cmd. VAR is address of the variable which will contain the
562 value. SET_DOC and SHOW_DOC are the documentation strings. */
564 add_setshow_zinteger_cmd (char *name, enum command_class class,
566 const char *set_doc, const char *show_doc,
567 const char *help_doc,
568 cmd_sfunc_ftype *set_func,
569 show_value_ftype *show_func,
570 struct cmd_list_element **set_list,
571 struct cmd_list_element **show_list)
573 add_setshow_cmd_full (name, class, var_zinteger, var,
574 set_doc, show_doc, help_doc,
580 /* Where SETCMD has already been added, add the corresponding show
581 command to LIST and return a pointer to the added command (not
582 necessarily the head of LIST). */
583 /* NOTE: cagney/2002-03-17: The original version of
584 deprecated_add_show_from_set used memcpy() to clone `set' into
585 `show'. This meant that in addition to all the needed fields (var,
586 name, et.al.) some unnecessary fields were copied (namely the
587 callback function). The function explictly copies relevant fields.
588 For a `set' and `show' command to share the same callback, the
589 caller must set both explicitly. */
590 struct cmd_list_element *
591 deprecated_add_show_from_set (struct cmd_list_element *setcmd,
592 struct cmd_list_element **list)
595 const static char setstring[] = "Set ";
597 /* Create a doc string by replacing "Set " at the start of the
598 `set'' command's doco with "Show ". */
599 gdb_assert (strncmp (setcmd->doc, setstring, sizeof (setstring) - 1) == 0);
600 doc = concat ("Show ", setcmd->doc + sizeof (setstring) - 1, NULL);
602 /* Insert the basic command. */
603 return add_set_or_show_cmd (setcmd->name, show_cmd, setcmd->class,
604 setcmd->var_type, setcmd->var, doc, list);
607 /* Remove the command named NAME from the command list. */
610 delete_cmd (char *name, struct cmd_list_element **list)
612 struct cmd_list_element *c;
613 struct cmd_list_element *p;
615 while (*list && strcmp ((*list)->name, name) == 0)
617 if ((*list)->hookee_pre)
618 (*list)->hookee_pre->hook_pre = 0; /* Hook slips out of its mouth */
619 if ((*list)->hookee_post)
620 (*list)->hookee_post->hook_post = 0; /* Hook slips out of its bottom */
627 for (c = *list; c->next;)
629 if (strcmp (c->next->name, name) == 0)
631 if (c->next->hookee_pre)
632 c->next->hookee_pre->hook_pre = 0; /* hooked cmd gets away. */
633 if (c->next->hookee_post)
634 c->next->hookee_post->hook_post = 0; /* remove post hook */
635 /* :( no fishing metaphore */
645 /* Shorthands to the commands above. */
647 /* Add an element to the list of info subcommands. */
649 struct cmd_list_element *
650 add_info (char *name, void (*fun) (char *, int), char *doc)
652 return add_cmd (name, no_class, fun, doc, &infolist);
655 /* Add an alias to the list of info subcommands. */
657 struct cmd_list_element *
658 add_info_alias (char *name, char *oldname, int abbrev_flag)
660 return add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
663 /* Add an element to the list of commands. */
665 struct cmd_list_element *
666 add_com (char *name, enum command_class class, void (*fun) (char *, int),
669 return add_cmd (name, class, fun, doc, &cmdlist);
672 /* Add an alias or abbreviation command to the list of commands. */
674 struct cmd_list_element *
675 add_com_alias (char *name, char *oldname, enum command_class class,
678 return add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
681 /* Recursively walk the commandlist structures, and print out the
682 documentation of commands that match our regex in either their
683 name, or their documentation.
686 apropos_cmd (struct ui_file *stream, struct cmd_list_element *commandlist,
687 struct re_pattern_buffer *regex, char *prefix)
689 struct cmd_list_element *c;
690 int returnvalue=1; /*Needed to avoid double printing*/
691 /* Walk through the commands */
692 for (c=commandlist;c;c=c->next)
696 /* Try to match against the name*/
697 returnvalue=re_search(regex,c->name,strlen(c->name),0,strlen(c->name),NULL);
698 if (returnvalue >= 0)
700 /* Stolen from help_cmd_list. We don't directly use
701 * help_cmd_list because it doesn't let us print out
704 fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
705 print_doc_line (stream, c->doc);
706 fputs_filtered ("\n", stream);
707 returnvalue=0; /*Set this so we don't print it again.*/
710 if (c->doc != NULL && returnvalue != 0)
712 /* Try to match against documentation */
713 if (re_search(regex,c->doc,strlen(c->doc),0,strlen(c->doc),NULL) >=0)
715 /* Stolen from help_cmd_list. We don't directly use
716 * help_cmd_list because it doesn't let us print out
719 fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
720 print_doc_line (stream, c->doc);
721 fputs_filtered ("\n", stream);
724 /* Check if this command has subcommands */
725 if (c->prefixlist != NULL)
727 /* Recursively call ourselves on the subcommand list,
728 passing the right prefix in.
730 apropos_cmd (stream,*c->prefixlist,regex,c->prefixname);
735 /* This command really has to deal with two things:
736 * 1) I want documentation on *this string* (usually called by
737 * "help commandname").
738 * 2) I want documentation on *this list* (usually called by
739 * giving a command that requires subcommands. Also called by saying
742 * I am going to split this into two seperate comamnds, help_cmd and
747 help_cmd (char *command, struct ui_file *stream)
749 struct cmd_list_element *c;
750 extern struct cmd_list_element *cmdlist;
754 help_list (cmdlist, "", all_classes, stream);
758 if (strcmp (command, "all") == 0)
764 c = lookup_cmd (&command, cmdlist, "", 0, 0);
769 /* There are three cases here.
770 If c->prefixlist is nonzero, we have a prefix command.
771 Print its documentation, then list its subcommands.
773 If c->func is non NULL, we really have a command. Print its
774 documentation and return.
776 If c->func is NULL, we have a class name. Print its
777 documentation (as if it were a command) and then set class to the
778 number of this class so that the commands in the class will be
781 fputs_filtered (c->doc, stream);
782 fputs_filtered ("\n", stream);
784 if (c->prefixlist == 0 && c->func != NULL)
786 fprintf_filtered (stream, "\n");
788 /* If this is a prefix command, print it's subcommands */
790 help_list (*c->prefixlist, c->prefixname, all_commands, stream);
792 /* If this is a class name, print all of the commands in the class */
794 help_list (cmdlist, "", c->class, stream);
796 if (c->hook_pre || c->hook_post)
797 fprintf_filtered (stream,
798 "\nThis command has a hook (or hooks) defined:\n");
801 fprintf_filtered (stream,
802 "\tThis command is run after : %s (pre hook)\n",
805 fprintf_filtered (stream,
806 "\tThis command is run before : %s (post hook)\n",
811 * Get a specific kind of help on a command list.
814 * CMDTYPE is the prefix to use in the title string.
815 * CLASS is the class with which to list the nodes of this list (see
816 * documentation for help_cmd_list below), As usual, ALL_COMMANDS for
817 * everything, ALL_CLASSES for just classes, and non-negative for only things
818 * in a specific class.
819 * and STREAM is the output stream on which to print things.
820 * If you call this routine with a class >= 0, it recurses.
823 help_list (struct cmd_list_element *list, char *cmdtype,
824 enum command_class class, struct ui_file *stream)
827 char *cmdtype1, *cmdtype2;
829 /* If CMDTYPE is "foo ", CMDTYPE1 gets " foo" and CMDTYPE2 gets "foo sub" */
830 len = strlen (cmdtype);
831 cmdtype1 = (char *) alloca (len + 1);
833 cmdtype2 = (char *) alloca (len + 4);
838 strncpy (cmdtype1 + 1, cmdtype, len - 1);
840 strncpy (cmdtype2, cmdtype, len - 1);
841 strcpy (cmdtype2 + len - 1, " sub");
844 if (class == all_classes)
845 fprintf_filtered (stream, "List of classes of %scommands:\n\n", cmdtype2);
847 fprintf_filtered (stream, "List of %scommands:\n\n", cmdtype2);
849 help_cmd_list (list, class, cmdtype, (int) class >= 0, stream);
851 if (class == all_classes)
853 fprintf_filtered (stream, "\n\
854 Type \"help%s\" followed by a class name for a list of commands in ",
857 fprintf_filtered (stream, "that class.");
860 fprintf_filtered (stream, "\nType \"help%s\" followed by %scommand name ",
863 fputs_filtered ("for ", stream);
865 fputs_filtered ("full ", stream);
867 fputs_filtered ("documentation.\n", stream);
868 fputs_filtered ("Command name abbreviations are allowed if unambiguous.\n",
873 help_all (struct ui_file *stream)
875 struct cmd_list_element *c;
876 extern struct cmd_list_element *cmdlist;
878 for (c = cmdlist; c; c = c->next)
882 /* If this is a prefix command, print it's subcommands */
884 help_cmd_list (*c->prefixlist, all_commands, c->prefixname, 0, stream);
886 /* If this is a class name, print all of the commands in the class */
887 else if (c->func == NULL)
888 help_cmd_list (cmdlist, c->class, "", 0, stream);
892 /* Print only the first line of STR on STREAM. */
894 print_doc_line (struct ui_file *stream, char *str)
896 static char *line_buffer = 0;
897 static int line_size;
903 line_buffer = (char *) xmalloc (line_size);
907 while (*p && *p != '\n' && *p != '.' && *p != ',')
909 if (p - str > line_size - 1)
911 line_size = p - str + 1;
913 line_buffer = (char *) xmalloc (line_size);
915 strncpy (line_buffer, str, p - str);
916 line_buffer[p - str] = '\0';
917 if (islower (line_buffer[0]))
918 line_buffer[0] = toupper (line_buffer[0]);
919 ui_out_text (uiout, line_buffer);
923 * Implement a help command on command list LIST.
924 * RECURSE should be non-zero if this should be done recursively on
925 * all sublists of LIST.
926 * PREFIX is the prefix to print before each command name.
927 * STREAM is the stream upon which the output should be written.
929 * A non-negative class number to list only commands in that
931 * ALL_COMMANDS to list all commands in list.
932 * ALL_CLASSES to list all classes in list.
934 * Note that RECURSE will be active on *all* sublists, not just the
935 * ones selected by the criteria above (ie. the selection mechanism
936 * is at the low level, not the high-level).
939 help_cmd_list (struct cmd_list_element *list, enum command_class class,
940 char *prefix, int recurse, struct ui_file *stream)
942 struct cmd_list_element *c;
944 for (c = list; c; c = c->next)
946 if (c->abbrev_flag == 0 &&
947 (class == all_commands
948 || (class == all_classes && c->func == NULL)
949 || (class == c->class && c->func != NULL)))
951 fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
952 print_doc_line (stream, c->doc);
953 fputs_filtered ("\n", stream);
956 && c->prefixlist != 0
957 && c->abbrev_flag == 0)
958 help_cmd_list (*c->prefixlist, class, c->prefixname, 1, stream);
963 /* Search the input clist for 'command'. Return the command if
964 found (or NULL if not), and return the number of commands
967 static struct cmd_list_element *
968 find_cmd (char *command, int len, struct cmd_list_element *clist,
969 int ignore_help_classes, int *nfound)
971 struct cmd_list_element *found, *c;
973 found = (struct cmd_list_element *) NULL;
975 for (c = clist; c; c = c->next)
976 if (!strncmp (command, c->name, len)
977 && (!ignore_help_classes || c->func))
981 if (c->name[len] == '\0')
990 /* This routine takes a line of TEXT and a CLIST in which to start the
991 lookup. When it returns it will have incremented the text pointer past
992 the section of text it matched, set *RESULT_LIST to point to the list in
993 which the last word was matched, and will return a pointer to the cmd
994 list element which the text matches. It will return NULL if no match at
995 all was possible. It will return -1 (cast appropriately, ick) if ambigous
996 matches are possible; in this case *RESULT_LIST will be set to point to
997 the list in which there are ambiguous choices (and *TEXT will be set to
998 the ambiguous text string).
1000 If the located command was an abbreviation, this routine returns the base
1001 command of the abbreviation.
1003 It does no error reporting whatsoever; control will always return
1004 to the superior routine.
1006 In the case of an ambiguous return (-1), *RESULT_LIST will be set to point
1007 at the prefix_command (ie. the best match) *or* (special case) will be NULL
1008 if no prefix command was ever found. For example, in the case of "info a",
1009 "info" matches without ambiguity, but "a" could be "args" or "address", so
1010 *RESULT_LIST is set to the cmd_list_element for "info". So in this case
1011 RESULT_LIST should not be interpeted as a pointer to the beginning of a
1012 list; it simply points to a specific command. In the case of an ambiguous
1013 return *TEXT is advanced past the last non-ambiguous prefix (e.g.
1014 "info t" can be "info types" or "info target"; upon return *TEXT has been
1015 advanced past "info ").
1017 If RESULT_LIST is NULL, don't set *RESULT_LIST (but don't otherwise
1018 affect the operation).
1020 This routine does *not* modify the text pointed to by TEXT.
1022 If IGNORE_HELP_CLASSES is nonzero, ignore any command list elements which
1023 are actually help classes rather than commands (i.e. the function field of
1024 the struct cmd_list_element is NULL). */
1026 struct cmd_list_element *
1027 lookup_cmd_1 (char **text, struct cmd_list_element *clist,
1028 struct cmd_list_element **result_list, int ignore_help_classes)
1031 int len, tmp, nfound;
1032 struct cmd_list_element *found, *c;
1035 while (**text == ' ' || **text == '\t')
1038 /* Treating underscores as part of command words is important
1039 so that "set args_foo()" doesn't get interpreted as
1040 "set args _foo()". */
1041 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1044 *p && (isalnum (*p) || *p == '-' || *p == '_' ||
1047 (*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
1049 (xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
1053 /* If nothing but whitespace, return 0. */
1059 /* *text and p now bracket the first command word to lookup (and
1060 it's length is len). We copy this into a local temporary */
1063 command = (char *) alloca (len + 1);
1064 for (tmp = 0; tmp < len; tmp++)
1066 char x = (*text)[tmp];
1069 command[len] = '\0';
1074 found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
1077 ** We didn't find the command in the entered case, so lower case it
1078 ** and search again.
1080 if (!found || nfound == 0)
1082 for (tmp = 0; tmp < len; tmp++)
1084 char x = command[tmp];
1085 command[tmp] = isupper (x) ? tolower (x) : x;
1087 found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
1090 /* If nothing matches, we have a simple failure. */
1096 if (result_list != NULL)
1097 /* Will be modified in calling routine
1098 if we know what the prefix command is. */
1100 return (struct cmd_list_element *) -1; /* Ambiguous. */
1103 /* We've matched something on this list. Move text pointer forward. */
1107 if (found->cmd_pointer)
1109 /* We drop the alias (abbreviation) in favor of the command it is
1110 pointing to. If the alias is deprecated, though, we need to
1111 warn the user about it before we drop it. Note that while we
1112 are warning about the alias, we may also warn about the command
1113 itself and we will adjust the appropriate DEPRECATED_WARN_USER
1116 if (found->flags & DEPRECATED_WARN_USER)
1117 deprecated_cmd_warning (&line);
1118 found = found->cmd_pointer;
1120 /* If we found a prefix command, keep looking. */
1122 if (found->prefixlist)
1124 c = lookup_cmd_1 (text, *found->prefixlist, result_list,
1125 ignore_help_classes);
1128 /* Didn't find anything; this is as far as we got. */
1129 if (result_list != NULL)
1130 *result_list = clist;
1133 else if (c == (struct cmd_list_element *) -1)
1135 /* We've gotten this far properly, but the next step
1136 is ambiguous. We need to set the result list to the best
1137 we've found (if an inferior hasn't already set it). */
1138 if (result_list != NULL)
1140 /* This used to say *result_list = *found->prefixlist
1141 If that was correct, need to modify the documentation
1142 at the top of this function to clarify what is supposed
1144 *result_list = found;
1155 if (result_list != NULL)
1156 *result_list = clist;
1161 /* All this hair to move the space to the front of cmdtype */
1164 undef_cmd_error (char *cmdtype, char *q)
1166 error (_("Undefined %scommand: \"%s\". Try \"help%s%.*s\"."),
1169 *cmdtype ? " " : "",
1170 (int) strlen (cmdtype) - 1,
1174 /* Look up the contents of *LINE as a command in the command list LIST.
1175 LIST is a chain of struct cmd_list_element's.
1176 If it is found, return the struct cmd_list_element for that command
1177 and update *LINE to point after the command name, at the first argument.
1178 If not found, call error if ALLOW_UNKNOWN is zero
1179 otherwise (or if error returns) return zero.
1180 Call error if specified command is ambiguous,
1181 unless ALLOW_UNKNOWN is negative.
1182 CMDTYPE precedes the word "command" in the error message.
1184 If INGNORE_HELP_CLASSES is nonzero, ignore any command list
1185 elements which are actually help classes rather than commands (i.e.
1186 the function field of the struct cmd_list_element is 0). */
1188 struct cmd_list_element *
1189 lookup_cmd (char **line, struct cmd_list_element *list, char *cmdtype,
1190 int allow_unknown, int ignore_help_classes)
1192 struct cmd_list_element *last_list = 0;
1193 struct cmd_list_element *c =
1194 lookup_cmd_1 (line, list, &last_list, ignore_help_classes);
1196 /* Note: Do not remove trailing whitespace here because this
1197 would be wrong for complete_command. Jim Kingdon */
1204 error (_("Lack of needed %scommand"), cmdtype);
1207 char *p = *line, *q;
1209 while (isalnum (*p) || *p == '-')
1212 q = (char *) alloca (p - *line + 1);
1213 strncpy (q, *line, p - *line);
1214 q[p - *line] = '\0';
1215 undef_cmd_error (cmdtype, q);
1221 else if (c == (struct cmd_list_element *) -1)
1223 /* Ambigous. Local values should be off prefixlist or called
1225 int local_allow_unknown = (last_list ? last_list->allow_unknown :
1227 char *local_cmdtype = last_list ? last_list->prefixname : cmdtype;
1228 struct cmd_list_element *local_list =
1229 (last_list ? *(last_list->prefixlist) : list);
1231 if (local_allow_unknown < 0)
1234 return last_list; /* Found something. */
1236 return 0; /* Found nothing. */
1240 /* Report as error. */
1245 ((*line)[amb_len] && (*line)[amb_len] != ' '
1246 && (*line)[amb_len] != '\t');
1251 for (c = local_list; c; c = c->next)
1252 if (!strncmp (*line, c->name, amb_len))
1254 if (strlen (ambbuf) + strlen (c->name) + 6 < (int) sizeof ambbuf)
1256 if (strlen (ambbuf))
1257 strcat (ambbuf, ", ");
1258 strcat (ambbuf, c->name);
1262 strcat (ambbuf, "..");
1266 error (_("Ambiguous %scommand \"%s\": %s."), local_cmdtype,
1268 return 0; /* lint */
1273 /* We've got something. It may still not be what the caller
1274 wants (if this command *needs* a subcommand). */
1275 while (**line == ' ' || **line == '\t')
1278 if (c->prefixlist && **line && !c->allow_unknown)
1279 undef_cmd_error (c->prefixname, *line);
1281 /* Seems to be what he wants. Return it. */
1287 /* We are here presumably because an alias or command in *TEXT is
1288 deprecated and a warning message should be generated. This function
1289 decodes *TEXT and potentially generates a warning message as outlined
1292 Example for 'set endian big' which has a fictitious alias 'seb'.
1294 If alias wasn't used in *TEXT, and the command is deprecated:
1295 "warning: 'set endian big' is deprecated."
1297 If alias was used, and only the alias is deprecated:
1298 "warning: 'seb' an alias for the command 'set endian big' is deprecated."
1300 If alias was used and command is deprecated (regardless of whether the
1301 alias itself is deprecated:
1303 "warning: 'set endian big' (seb) is deprecated."
1305 After the message has been sent, clear the appropriate flags in the
1306 command and/or the alias so the user is no longer bothered.
1310 deprecated_cmd_warning (char **text)
1312 struct cmd_list_element *alias = NULL;
1313 struct cmd_list_element *prefix_cmd = NULL;
1314 struct cmd_list_element *cmd = NULL;
1315 struct cmd_list_element *c;
1318 if (!lookup_cmd_composition (*text, &alias, &prefix_cmd, &cmd))
1319 /* return if text doesn't evaluate to a command */
1322 if (!((alias ? (alias->flags & DEPRECATED_WARN_USER) : 0)
1323 || (cmd->flags & DEPRECATED_WARN_USER) ) )
1324 /* return if nothing is deprecated */
1327 printf_filtered ("Warning:");
1329 if (alias && !(cmd->flags & CMD_DEPRECATED))
1330 printf_filtered (" '%s', an alias for the", alias->name);
1332 printf_filtered (" command '");
1335 printf_filtered ("%s", prefix_cmd->prefixname);
1337 printf_filtered ("%s", cmd->name);
1339 if (alias && (cmd->flags & CMD_DEPRECATED))
1340 printf_filtered ("' (%s) is deprecated.\n", alias->name);
1342 printf_filtered ("' is deprecated.\n");
1345 /* if it is only the alias that is deprecated, we want to indicate the
1346 new alias, otherwise we'll indicate the new command */
1348 if (alias && !(cmd->flags & CMD_DEPRECATED))
1350 if (alias->replacement)
1351 printf_filtered ("Use '%s'.\n\n", alias->replacement);
1353 printf_filtered ("No alternative known.\n\n");
1357 if (cmd->replacement)
1358 printf_filtered ("Use '%s'.\n\n", cmd->replacement);
1360 printf_filtered ("No alternative known.\n\n");
1363 /* We've warned you, now we'll keep quiet */
1365 alias->flags &= ~DEPRECATED_WARN_USER;
1367 cmd->flags &= ~DEPRECATED_WARN_USER;
1372 /* Look up the contents of LINE as a command in the command list 'cmdlist'.
1373 Return 1 on success, 0 on failure.
1375 If LINE refers to an alias, *alias will point to that alias.
1377 If LINE is a postfix command (i.e. one that is preceeded by a prefix
1378 command) set *prefix_cmd.
1380 Set *cmd to point to the command LINE indicates.
1382 If any of *alias, *prefix_cmd, or *cmd cannot be determined or do not
1383 exist, they are NULL when we return.
1387 lookup_cmd_composition (char *text,
1388 struct cmd_list_element **alias,
1389 struct cmd_list_element **prefix_cmd,
1390 struct cmd_list_element **cmd)
1393 int len, tmp, nfound;
1394 struct cmd_list_element *cur_list;
1395 struct cmd_list_element *prev_cmd;
1404 /* Go through as many command lists as we need to
1405 to find the command TEXT refers to. */
1409 while (*text == ' ' || *text == '\t')
1412 /* Treating underscores as part of command words is important
1413 so that "set args_foo()" doesn't get interpreted as
1414 "set args _foo()". */
1415 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1418 *p && (isalnum (*p) || *p == '-' || *p == '_' ||
1421 (*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
1423 (xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
1427 /* If nothing but whitespace, return. */
1433 /* text and p now bracket the first command word to lookup (and
1434 it's length is len). We copy this into a local temporary */
1436 command = (char *) alloca (len + 1);
1437 for (tmp = 0; tmp < len; tmp++)
1442 command[len] = '\0';
1447 *cmd = find_cmd (command, len, cur_list, 1, &nfound);
1449 /* We didn't find the command in the entered case, so lower case it
1452 if (!*cmd || nfound == 0)
1454 for (tmp = 0; tmp < len; tmp++)
1456 char x = command[tmp];
1457 command[tmp] = isupper (x) ? tolower (x) : x;
1459 *cmd = find_cmd (command, len, cur_list, 1, &nfound);
1462 if (*cmd == (struct cmd_list_element *) -1)
1464 return 0; /* ambiguous */
1468 return 0; /* nothing found */
1471 if ((*cmd)->cmd_pointer)
1473 /* cmd was actually an alias, we note that an alias was used
1474 (by assigning *alais) and we set *cmd.
1477 *cmd = (*cmd)->cmd_pointer;
1479 *prefix_cmd = prev_cmd;
1481 if ((*cmd)->prefixlist)
1482 cur_list = *(*cmd)->prefixlist;
1490 /* Helper function for SYMBOL_COMPLETION_FUNCTION. */
1492 /* Return a vector of char pointers which point to the different
1493 possible completions in LIST of TEXT.
1495 WORD points in the same buffer as TEXT, and completions should be
1496 returned relative to this position. For example, suppose TEXT is "foo"
1497 and we want to complete to "foobar". If WORD is "oo", return
1498 "oobar"; if WORD is "baz/foo", return "baz/foobar". */
1501 complete_on_cmdlist (struct cmd_list_element *list, char *text, char *word)
1503 struct cmd_list_element *ptr;
1505 int sizeof_matchlist;
1507 int textlen = strlen (text);
1509 sizeof_matchlist = 10;
1510 matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
1513 for (ptr = list; ptr; ptr = ptr->next)
1514 if (!strncmp (ptr->name, text, textlen)
1515 && !ptr->abbrev_flag
1517 || ptr->prefixlist))
1519 if (matches == sizeof_matchlist)
1521 sizeof_matchlist *= 2;
1522 matchlist = (char **) xrealloc ((char *) matchlist,
1524 * sizeof (char *)));
1527 matchlist[matches] = (char *)
1528 xmalloc (strlen (word) + strlen (ptr->name) + 1);
1530 strcpy (matchlist[matches], ptr->name);
1531 else if (word > text)
1533 /* Return some portion of ptr->name. */
1534 strcpy (matchlist[matches], ptr->name + (word - text));
1538 /* Return some of text plus ptr->name. */
1539 strncpy (matchlist[matches], word, text - word);
1540 matchlist[matches][text - word] = '\0';
1541 strcat (matchlist[matches], ptr->name);
1553 matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
1554 * sizeof (char *)));
1555 matchlist[matches] = (char *) 0;
1561 /* Helper function for SYMBOL_COMPLETION_FUNCTION. */
1563 /* Return a vector of char pointers which point to the different
1564 possible completions in CMD of TEXT.
1566 WORD points in the same buffer as TEXT, and completions should be
1567 returned relative to this position. For example, suppose TEXT is "foo"
1568 and we want to complete to "foobar". If WORD is "oo", return
1569 "oobar"; if WORD is "baz/foo", return "baz/foobar". */
1572 complete_on_enum (const char *enumlist[],
1577 int sizeof_matchlist;
1579 int textlen = strlen (text);
1583 sizeof_matchlist = 10;
1584 matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
1587 for (i = 0; (name = enumlist[i]) != NULL; i++)
1588 if (strncmp (name, text, textlen) == 0)
1590 if (matches == sizeof_matchlist)
1592 sizeof_matchlist *= 2;
1593 matchlist = (char **) xrealloc ((char *) matchlist,
1595 * sizeof (char *)));
1598 matchlist[matches] = (char *)
1599 xmalloc (strlen (word) + strlen (name) + 1);
1601 strcpy (matchlist[matches], name);
1602 else if (word > text)
1604 /* Return some portion of name. */
1605 strcpy (matchlist[matches], name + (word - text));
1609 /* Return some of text plus name. */
1610 strncpy (matchlist[matches], word, text - word);
1611 matchlist[matches][text - word] = '\0';
1612 strcat (matchlist[matches], name);
1624 matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
1625 * sizeof (char *)));
1626 matchlist[matches] = (char *) 0;
1633 /* check function pointer */
1635 cmd_func_p (struct cmd_list_element *cmd)
1637 return (cmd->func != NULL);
1641 /* call the command function */
1643 cmd_func (struct cmd_list_element *cmd, char *args, int from_tty)
1645 if (cmd_func_p (cmd))
1646 (*cmd->func) (cmd, args, from_tty);
1648 error (_("Invalid command"));