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"
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 fprint_setshow_ftype *fprint_setshow,
335 cmd_sfunc_ftype *set_func,
336 cmd_sfunc_ftype *show_func,
337 struct cmd_list_element **set_list,
338 struct cmd_list_element **show_list,
339 struct cmd_list_element **set_result,
340 struct cmd_list_element **show_result)
342 struct cmd_list_element *set;
343 struct cmd_list_element *show;
347 if (help_doc != NULL)
349 full_set_doc = xstrprintf ("%s\n%s", set_doc, help_doc);
350 full_show_doc = xstrprintf ("%s\n%s", show_doc, help_doc);
354 full_set_doc = xstrdup (set_doc);
355 full_show_doc = xstrdup (show_doc);
357 set = add_set_or_show_cmd (name, set_cmd, class, var_type, var,
358 full_set_doc, set_list);
359 if (set_func != NULL)
360 set_cmd_sfunc (set, set_func);
361 show = add_set_or_show_cmd (name, show_cmd, class, var_type, var,
362 full_show_doc, show_list);
363 show->fprint_setshow = fprint_setshow;
365 if (show_func != NULL)
366 set_cmd_sfunc (show, show_func);
368 if (set_result != NULL)
370 if (show_result != NULL)
374 struct cmd_list_element *
375 add_set_cmd (char *name,
376 enum command_class class,
380 struct cmd_list_element **list)
382 return add_set_or_show_cmd (name, set_cmd, class, var_type, var, doc, list);
385 /* Add element named NAME to command list LIST (the list for set
386 or some sublist thereof).
387 CLASS is as in add_cmd.
388 ENUMLIST is a list of strings which may follow NAME.
389 VAR is address of the variable which will contain the matching string
391 DOC is the documentation string. */
393 struct cmd_list_element *
394 add_set_enum_cmd (char *name,
395 enum command_class class,
396 const char *enumlist[],
399 struct cmd_list_element **list)
401 struct cmd_list_element *c
402 = add_set_cmd (name, class, var_enum, var, doc, list);
408 /* Add element named NAME to command list LIST (the list for set or
409 some sublist thereof). CLASS is as in add_cmd. ENUMLIST is a list
410 of strings which may follow NAME. VAR is address of the variable
411 which will contain the matching string (from ENUMLIST). */
414 add_setshow_enum_cmd (char *name,
415 enum command_class class,
416 const char *enumlist[],
419 const char *show_doc,
420 const char *help_doc,
421 fprint_setshow_ftype *fprint_setshow,
422 cmd_sfunc_ftype *set_func,
423 cmd_sfunc_ftype *show_func,
424 struct cmd_list_element **set_list,
425 struct cmd_list_element **show_list)
427 struct cmd_list_element *c;
428 add_setshow_cmd_full (name, class, var_enum, var,
429 set_doc, show_doc, help_doc,
437 /* Add an auto-boolean command named NAME to both the set and show
438 command list lists. CLASS is as in add_cmd. VAR is address of the
439 variable which will contain the value. DOC is the documentation
440 string. FUNC is the corresponding callback. */
442 add_setshow_auto_boolean_cmd (char *name,
443 enum command_class class,
444 enum auto_boolean *var,
445 const char *set_doc, const char *show_doc,
446 const char *help_doc,
447 fprint_setshow_ftype *fprint_setshow,
448 cmd_sfunc_ftype *set_func,
449 cmd_sfunc_ftype *show_func,
450 struct cmd_list_element **set_list,
451 struct cmd_list_element **show_list)
453 static const char *auto_boolean_enums[] = { "on", "off", "auto", NULL };
454 struct cmd_list_element *c;
455 add_setshow_cmd_full (name, class, var_auto_boolean, var,
456 set_doc, show_doc, help_doc, fprint_setshow,
460 c->enums = auto_boolean_enums;
463 /* Add element named NAME to both the set and show command LISTs (the
464 list for set/show or some sublist thereof). CLASS is as in
465 add_cmd. VAR is address of the variable which will contain the
466 value. SET_DOC and SHOW_DOC are the documentation strings. */
468 add_setshow_boolean_cmd (char *name, enum command_class class, int *var,
469 const char *set_doc, const char *show_doc,
470 const char *help_doc,
471 fprint_setshow_ftype *fprint_setshow,
472 cmd_sfunc_ftype *set_func,
473 cmd_sfunc_ftype *show_func,
474 struct cmd_list_element **set_list,
475 struct cmd_list_element **show_list)
477 static const char *boolean_enums[] = { "on", "off", NULL };
478 struct cmd_list_element *c;
479 add_setshow_cmd_full (name, class, var_boolean, var,
480 set_doc, show_doc, help_doc, fprint_setshow,
484 c->enums = boolean_enums;
487 /* Add element named NAME to both the set and show command LISTs (the
488 list for set/show or some sublist thereof). */
490 add_setshow_filename_cmd (char *name, enum command_class class,
492 const char *set_doc, const char *show_doc,
493 const char *help_doc,
494 fprint_setshow_ftype *fprint_setshow,
495 cmd_sfunc_ftype *set_func,
496 cmd_sfunc_ftype *show_func,
497 struct cmd_list_element **set_list,
498 struct cmd_list_element **show_list)
500 add_setshow_cmd_full (name, class, var_filename, var,
501 set_doc, show_doc, help_doc, fprint_setshow,
507 /* Add element named NAME to both the set and show command LISTs (the
508 list for set/show or some sublist thereof). */
510 add_setshow_string_cmd (char *name, enum command_class class,
512 const char *set_doc, const char *show_doc,
513 const char *help_doc,
514 fprint_setshow_ftype *fprint_setshow,
515 cmd_sfunc_ftype *set_func,
516 cmd_sfunc_ftype *show_func,
517 struct cmd_list_element **set_list,
518 struct cmd_list_element **show_list)
520 add_setshow_cmd_full (name, class, var_string, var,
521 set_doc, show_doc, help_doc, fprint_setshow,
527 /* Add element named NAME to both the set and show command LISTs (the
528 list for set/show or some sublist thereof). CLASS is as in
529 add_cmd. VAR is address of the variable which will contain the
530 value. SET_DOC and SHOW_DOC are the documentation strings. */
532 add_setshow_uinteger_cmd (char *name, enum command_class class,
534 const char *set_doc, const char *show_doc,
535 const char *help_doc,
536 fprint_setshow_ftype *fprint_setshow,
537 cmd_sfunc_ftype *set_func,
538 cmd_sfunc_ftype *show_func,
539 struct cmd_list_element **set_list,
540 struct cmd_list_element **show_list)
542 add_setshow_cmd_full (name, class, var_uinteger, var,
543 set_doc, show_doc, help_doc, fprint_setshow,
549 /* Add element named NAME to both the set and show command LISTs (the
550 list for set/show or some sublist thereof). CLASS is as in
551 add_cmd. VAR is address of the variable which will contain the
552 value. SET_DOC and SHOW_DOC are the documentation strings. */
554 add_setshow_zinteger_cmd (char *name, enum command_class class,
556 const char *set_doc, const char *show_doc,
557 const char *help_doc,
558 fprint_setshow_ftype *fprint_setshow,
559 cmd_sfunc_ftype *set_func,
560 cmd_sfunc_ftype *show_func,
561 struct cmd_list_element **set_list,
562 struct cmd_list_element **show_list)
564 add_setshow_cmd_full (name, class, var_zinteger, var,
565 set_doc, show_doc, help_doc, fprint_setshow,
571 /* Where SETCMD has already been added, add the corresponding show
572 command to LIST and return a pointer to the added command (not
573 necessarily the head of LIST). */
574 /* NOTE: cagney/2002-03-17: The original version of
575 deprecated_add_show_from_set used memcpy() to clone `set' into
576 `show'. This meant that in addition to all the needed fields (var,
577 name, et.al.) some unnecessary fields were copied (namely the
578 callback function). The function explictly copies relevant fields.
579 For a `set' and `show' command to share the same callback, the
580 caller must set both explicitly. */
581 struct cmd_list_element *
582 deprecated_add_show_from_set (struct cmd_list_element *setcmd,
583 struct cmd_list_element **list)
586 const static char setstring[] = "Set ";
588 /* Create a doc string by replacing "Set " at the start of the
589 `set'' command's doco with "Show ". */
590 gdb_assert (strncmp (setcmd->doc, setstring, sizeof (setstring) - 1) == 0);
591 doc = concat ("Show ", setcmd->doc + sizeof (setstring) - 1, NULL);
593 /* Insert the basic command. */
594 return add_set_or_show_cmd (setcmd->name, show_cmd, setcmd->class,
595 setcmd->var_type, setcmd->var, doc, list);
598 /* Remove the command named NAME from the command list. */
601 delete_cmd (char *name, struct cmd_list_element **list)
603 struct cmd_list_element *c;
604 struct cmd_list_element *p;
606 while (*list && strcmp ((*list)->name, name) == 0)
608 if ((*list)->hookee_pre)
609 (*list)->hookee_pre->hook_pre = 0; /* Hook slips out of its mouth */
610 if ((*list)->hookee_post)
611 (*list)->hookee_post->hook_post = 0; /* Hook slips out of its bottom */
618 for (c = *list; c->next;)
620 if (strcmp (c->next->name, name) == 0)
622 if (c->next->hookee_pre)
623 c->next->hookee_pre->hook_pre = 0; /* hooked cmd gets away. */
624 if (c->next->hookee_post)
625 c->next->hookee_post->hook_post = 0; /* remove post hook */
626 /* :( no fishing metaphore */
636 /* Shorthands to the commands above. */
638 /* Add an element to the list of info subcommands. */
640 struct cmd_list_element *
641 add_info (char *name, void (*fun) (char *, int), char *doc)
643 return add_cmd (name, no_class, fun, doc, &infolist);
646 /* Add an alias to the list of info subcommands. */
648 struct cmd_list_element *
649 add_info_alias (char *name, char *oldname, int abbrev_flag)
651 return add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
654 /* Add an element to the list of commands. */
656 struct cmd_list_element *
657 add_com (char *name, enum command_class class, void (*fun) (char *, int),
660 return add_cmd (name, class, fun, doc, &cmdlist);
663 /* Add an alias or abbreviation command to the list of commands. */
665 struct cmd_list_element *
666 add_com_alias (char *name, char *oldname, enum command_class class,
669 return add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
672 /* Recursively walk the commandlist structures, and print out the
673 documentation of commands that match our regex in either their
674 name, or their documentation.
677 apropos_cmd (struct ui_file *stream, struct cmd_list_element *commandlist,
678 struct re_pattern_buffer *regex, char *prefix)
680 struct cmd_list_element *c;
681 int returnvalue=1; /*Needed to avoid double printing*/
682 /* Walk through the commands */
683 for (c=commandlist;c;c=c->next)
687 /* Try to match against the name*/
688 returnvalue=re_search(regex,c->name,strlen(c->name),0,strlen(c->name),NULL);
689 if (returnvalue >= 0)
691 /* Stolen from help_cmd_list. We don't directly use
692 * help_cmd_list because it doesn't let us print out
695 fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
696 print_doc_line (stream, c->doc);
697 fputs_filtered ("\n", stream);
698 returnvalue=0; /*Set this so we don't print it again.*/
701 if (c->doc != NULL && returnvalue != 0)
703 /* Try to match against documentation */
704 if (re_search(regex,c->doc,strlen(c->doc),0,strlen(c->doc),NULL) >=0)
706 /* Stolen from help_cmd_list. We don't directly use
707 * help_cmd_list because it doesn't let us print out
710 fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
711 print_doc_line (stream, c->doc);
712 fputs_filtered ("\n", stream);
715 /* Check if this command has subcommands */
716 if (c->prefixlist != NULL)
718 /* Recursively call ourselves on the subcommand list,
719 passing the right prefix in.
721 apropos_cmd (stream,*c->prefixlist,regex,c->prefixname);
726 /* This command really has to deal with two things:
727 * 1) I want documentation on *this string* (usually called by
728 * "help commandname").
729 * 2) I want documentation on *this list* (usually called by
730 * giving a command that requires subcommands. Also called by saying
733 * I am going to split this into two seperate comamnds, help_cmd and
738 help_cmd (char *command, struct ui_file *stream)
740 struct cmd_list_element *c;
741 extern struct cmd_list_element *cmdlist;
745 help_list (cmdlist, "", all_classes, stream);
749 if (strcmp (command, "all") == 0)
755 c = lookup_cmd (&command, cmdlist, "", 0, 0);
760 /* There are three cases here.
761 If c->prefixlist is nonzero, we have a prefix command.
762 Print its documentation, then list its subcommands.
764 If c->func is non NULL, we really have a command. Print its
765 documentation and return.
767 If c->func is NULL, we have a class name. Print its
768 documentation (as if it were a command) and then set class to the
769 number of this class so that the commands in the class will be
772 fputs_filtered (c->doc, stream);
773 fputs_filtered ("\n", stream);
775 if (c->prefixlist == 0 && c->func != NULL)
777 fprintf_filtered (stream, "\n");
779 /* If this is a prefix command, print it's subcommands */
781 help_list (*c->prefixlist, c->prefixname, all_commands, stream);
783 /* If this is a class name, print all of the commands in the class */
785 help_list (cmdlist, "", c->class, stream);
787 if (c->hook_pre || c->hook_post)
788 fprintf_filtered (stream,
789 "\nThis command has a hook (or hooks) defined:\n");
792 fprintf_filtered (stream,
793 "\tThis command is run after : %s (pre hook)\n",
796 fprintf_filtered (stream,
797 "\tThis command is run before : %s (post hook)\n",
802 * Get a specific kind of help on a command list.
805 * CMDTYPE is the prefix to use in the title string.
806 * CLASS is the class with which to list the nodes of this list (see
807 * documentation for help_cmd_list below), As usual, ALL_COMMANDS for
808 * everything, ALL_CLASSES for just classes, and non-negative for only things
809 * in a specific class.
810 * and STREAM is the output stream on which to print things.
811 * If you call this routine with a class >= 0, it recurses.
814 help_list (struct cmd_list_element *list, char *cmdtype,
815 enum command_class class, struct ui_file *stream)
818 char *cmdtype1, *cmdtype2;
820 /* If CMDTYPE is "foo ", CMDTYPE1 gets " foo" and CMDTYPE2 gets "foo sub" */
821 len = strlen (cmdtype);
822 cmdtype1 = (char *) alloca (len + 1);
824 cmdtype2 = (char *) alloca (len + 4);
829 strncpy (cmdtype1 + 1, cmdtype, len - 1);
831 strncpy (cmdtype2, cmdtype, len - 1);
832 strcpy (cmdtype2 + len - 1, " sub");
835 if (class == all_classes)
836 fprintf_filtered (stream, "List of classes of %scommands:\n\n", cmdtype2);
838 fprintf_filtered (stream, "List of %scommands:\n\n", cmdtype2);
840 help_cmd_list (list, class, cmdtype, (int) class >= 0, stream);
842 if (class == all_classes)
844 fprintf_filtered (stream, "\n\
845 Type \"help%s\" followed by a class name for a list of commands in ",
848 fprintf_filtered (stream, "that class.");
851 fprintf_filtered (stream, "\nType \"help%s\" followed by %scommand name ",
854 fputs_filtered ("for ", stream);
856 fputs_filtered ("full ", stream);
858 fputs_filtered ("documentation.\n", stream);
859 fputs_filtered ("Command name abbreviations are allowed if unambiguous.\n",
864 help_all (struct ui_file *stream)
866 struct cmd_list_element *c;
867 extern struct cmd_list_element *cmdlist;
869 for (c = cmdlist; c; c = c->next)
873 /* If this is a prefix command, print it's subcommands */
875 help_cmd_list (*c->prefixlist, all_commands, c->prefixname, 0, stream);
877 /* If this is a class name, print all of the commands in the class */
878 else if (c->func == NULL)
879 help_cmd_list (cmdlist, c->class, "", 0, stream);
883 /* Print only the first line of STR on STREAM. */
885 print_doc_line (struct ui_file *stream, char *str)
887 static char *line_buffer = 0;
888 static int line_size;
894 line_buffer = (char *) xmalloc (line_size);
898 while (*p && *p != '\n' && *p != '.' && *p != ',')
900 if (p - str > line_size - 1)
902 line_size = p - str + 1;
904 line_buffer = (char *) xmalloc (line_size);
906 strncpy (line_buffer, str, p - str);
907 line_buffer[p - str] = '\0';
908 if (islower (line_buffer[0]))
909 line_buffer[0] = toupper (line_buffer[0]);
910 ui_out_text (uiout, line_buffer);
914 * Implement a help command on command list LIST.
915 * RECURSE should be non-zero if this should be done recursively on
916 * all sublists of LIST.
917 * PREFIX is the prefix to print before each command name.
918 * STREAM is the stream upon which the output should be written.
920 * A non-negative class number to list only commands in that
922 * ALL_COMMANDS to list all commands in list.
923 * ALL_CLASSES to list all classes in list.
925 * Note that RECURSE will be active on *all* sublists, not just the
926 * ones selected by the criteria above (ie. the selection mechanism
927 * is at the low level, not the high-level).
930 help_cmd_list (struct cmd_list_element *list, enum command_class class,
931 char *prefix, int recurse, struct ui_file *stream)
933 struct cmd_list_element *c;
935 for (c = list; c; c = c->next)
937 if (c->abbrev_flag == 0 &&
938 (class == all_commands
939 || (class == all_classes && c->func == NULL)
940 || (class == c->class && c->func != NULL)))
942 fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
943 print_doc_line (stream, c->doc);
944 fputs_filtered ("\n", stream);
947 && c->prefixlist != 0
948 && c->abbrev_flag == 0)
949 help_cmd_list (*c->prefixlist, class, c->prefixname, 1, stream);
954 /* Search the input clist for 'command'. Return the command if
955 found (or NULL if not), and return the number of commands
958 static struct cmd_list_element *
959 find_cmd (char *command, int len, struct cmd_list_element *clist,
960 int ignore_help_classes, int *nfound)
962 struct cmd_list_element *found, *c;
964 found = (struct cmd_list_element *) NULL;
966 for (c = clist; c; c = c->next)
967 if (!strncmp (command, c->name, len)
968 && (!ignore_help_classes || c->func))
972 if (c->name[len] == '\0')
981 /* This routine takes a line of TEXT and a CLIST in which to start the
982 lookup. When it returns it will have incremented the text pointer past
983 the section of text it matched, set *RESULT_LIST to point to the list in
984 which the last word was matched, and will return a pointer to the cmd
985 list element which the text matches. It will return NULL if no match at
986 all was possible. It will return -1 (cast appropriately, ick) if ambigous
987 matches are possible; in this case *RESULT_LIST will be set to point to
988 the list in which there are ambiguous choices (and *TEXT will be set to
989 the ambiguous text string).
991 If the located command was an abbreviation, this routine returns the base
992 command of the abbreviation.
994 It does no error reporting whatsoever; control will always return
995 to the superior routine.
997 In the case of an ambiguous return (-1), *RESULT_LIST will be set to point
998 at the prefix_command (ie. the best match) *or* (special case) will be NULL
999 if no prefix command was ever found. For example, in the case of "info a",
1000 "info" matches without ambiguity, but "a" could be "args" or "address", so
1001 *RESULT_LIST is set to the cmd_list_element for "info". So in this case
1002 RESULT_LIST should not be interpeted as a pointer to the beginning of a
1003 list; it simply points to a specific command. In the case of an ambiguous
1004 return *TEXT is advanced past the last non-ambiguous prefix (e.g.
1005 "info t" can be "info types" or "info target"; upon return *TEXT has been
1006 advanced past "info ").
1008 If RESULT_LIST is NULL, don't set *RESULT_LIST (but don't otherwise
1009 affect the operation).
1011 This routine does *not* modify the text pointed to by TEXT.
1013 If IGNORE_HELP_CLASSES is nonzero, ignore any command list elements which
1014 are actually help classes rather than commands (i.e. the function field of
1015 the struct cmd_list_element is NULL). */
1017 struct cmd_list_element *
1018 lookup_cmd_1 (char **text, struct cmd_list_element *clist,
1019 struct cmd_list_element **result_list, int ignore_help_classes)
1022 int len, tmp, nfound;
1023 struct cmd_list_element *found, *c;
1026 while (**text == ' ' || **text == '\t')
1029 /* Treating underscores as part of command words is important
1030 so that "set args_foo()" doesn't get interpreted as
1031 "set args _foo()". */
1032 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1035 *p && (isalnum (*p) || *p == '-' || *p == '_' ||
1038 (*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
1040 (xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
1044 /* If nothing but whitespace, return 0. */
1050 /* *text and p now bracket the first command word to lookup (and
1051 it's length is len). We copy this into a local temporary */
1054 command = (char *) alloca (len + 1);
1055 for (tmp = 0; tmp < len; tmp++)
1057 char x = (*text)[tmp];
1060 command[len] = '\0';
1065 found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
1068 ** We didn't find the command in the entered case, so lower case it
1069 ** and search again.
1071 if (!found || nfound == 0)
1073 for (tmp = 0; tmp < len; tmp++)
1075 char x = command[tmp];
1076 command[tmp] = isupper (x) ? tolower (x) : x;
1078 found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
1081 /* If nothing matches, we have a simple failure. */
1087 if (result_list != NULL)
1088 /* Will be modified in calling routine
1089 if we know what the prefix command is. */
1091 return (struct cmd_list_element *) -1; /* Ambiguous. */
1094 /* We've matched something on this list. Move text pointer forward. */
1098 if (found->cmd_pointer)
1100 /* We drop the alias (abbreviation) in favor of the command it is
1101 pointing to. If the alias is deprecated, though, we need to
1102 warn the user about it before we drop it. Note that while we
1103 are warning about the alias, we may also warn about the command
1104 itself and we will adjust the appropriate DEPRECATED_WARN_USER
1107 if (found->flags & DEPRECATED_WARN_USER)
1108 deprecated_cmd_warning (&line);
1109 found = found->cmd_pointer;
1111 /* If we found a prefix command, keep looking. */
1113 if (found->prefixlist)
1115 c = lookup_cmd_1 (text, *found->prefixlist, result_list,
1116 ignore_help_classes);
1119 /* Didn't find anything; this is as far as we got. */
1120 if (result_list != NULL)
1121 *result_list = clist;
1124 else if (c == (struct cmd_list_element *) -1)
1126 /* We've gotten this far properly, but the next step
1127 is ambiguous. We need to set the result list to the best
1128 we've found (if an inferior hasn't already set it). */
1129 if (result_list != NULL)
1131 /* This used to say *result_list = *found->prefixlist
1132 If that was correct, need to modify the documentation
1133 at the top of this function to clarify what is supposed
1135 *result_list = found;
1146 if (result_list != NULL)
1147 *result_list = clist;
1152 /* All this hair to move the space to the front of cmdtype */
1155 undef_cmd_error (char *cmdtype, char *q)
1157 error (_("Undefined %scommand: \"%s\". Try \"help%s%.*s\"."),
1160 *cmdtype ? " " : "",
1161 (int) strlen (cmdtype) - 1,
1165 /* Look up the contents of *LINE as a command in the command list LIST.
1166 LIST is a chain of struct cmd_list_element's.
1167 If it is found, return the struct cmd_list_element for that command
1168 and update *LINE to point after the command name, at the first argument.
1169 If not found, call error if ALLOW_UNKNOWN is zero
1170 otherwise (or if error returns) return zero.
1171 Call error if specified command is ambiguous,
1172 unless ALLOW_UNKNOWN is negative.
1173 CMDTYPE precedes the word "command" in the error message.
1175 If INGNORE_HELP_CLASSES is nonzero, ignore any command list
1176 elements which are actually help classes rather than commands (i.e.
1177 the function field of the struct cmd_list_element is 0). */
1179 struct cmd_list_element *
1180 lookup_cmd (char **line, struct cmd_list_element *list, char *cmdtype,
1181 int allow_unknown, int ignore_help_classes)
1183 struct cmd_list_element *last_list = 0;
1184 struct cmd_list_element *c =
1185 lookup_cmd_1 (line, list, &last_list, ignore_help_classes);
1187 /* Note: Do not remove trailing whitespace here because this
1188 would be wrong for complete_command. Jim Kingdon */
1195 error (_("Lack of needed %scommand"), cmdtype);
1198 char *p = *line, *q;
1200 while (isalnum (*p) || *p == '-')
1203 q = (char *) alloca (p - *line + 1);
1204 strncpy (q, *line, p - *line);
1205 q[p - *line] = '\0';
1206 undef_cmd_error (cmdtype, q);
1212 else if (c == (struct cmd_list_element *) -1)
1214 /* Ambigous. Local values should be off prefixlist or called
1216 int local_allow_unknown = (last_list ? last_list->allow_unknown :
1218 char *local_cmdtype = last_list ? last_list->prefixname : cmdtype;
1219 struct cmd_list_element *local_list =
1220 (last_list ? *(last_list->prefixlist) : list);
1222 if (local_allow_unknown < 0)
1225 return last_list; /* Found something. */
1227 return 0; /* Found nothing. */
1231 /* Report as error. */
1236 ((*line)[amb_len] && (*line)[amb_len] != ' '
1237 && (*line)[amb_len] != '\t');
1242 for (c = local_list; c; c = c->next)
1243 if (!strncmp (*line, c->name, amb_len))
1245 if (strlen (ambbuf) + strlen (c->name) + 6 < (int) sizeof ambbuf)
1247 if (strlen (ambbuf))
1248 strcat (ambbuf, ", ");
1249 strcat (ambbuf, c->name);
1253 strcat (ambbuf, "..");
1257 error (_("Ambiguous %scommand \"%s\": %s."), local_cmdtype,
1259 return 0; /* lint */
1264 /* We've got something. It may still not be what the caller
1265 wants (if this command *needs* a subcommand). */
1266 while (**line == ' ' || **line == '\t')
1269 if (c->prefixlist && **line && !c->allow_unknown)
1270 undef_cmd_error (c->prefixname, *line);
1272 /* Seems to be what he wants. Return it. */
1278 /* We are here presumably because an alias or command in *TEXT is
1279 deprecated and a warning message should be generated. This function
1280 decodes *TEXT and potentially generates a warning message as outlined
1283 Example for 'set endian big' which has a fictitious alias 'seb'.
1285 If alias wasn't used in *TEXT, and the command is deprecated:
1286 "warning: 'set endian big' is deprecated."
1288 If alias was used, and only the alias is deprecated:
1289 "warning: 'seb' an alias for the command 'set endian big' is deprecated."
1291 If alias was used and command is deprecated (regardless of whether the
1292 alias itself is deprecated:
1294 "warning: 'set endian big' (seb) is deprecated."
1296 After the message has been sent, clear the appropriate flags in the
1297 command and/or the alias so the user is no longer bothered.
1301 deprecated_cmd_warning (char **text)
1303 struct cmd_list_element *alias = NULL;
1304 struct cmd_list_element *prefix_cmd = NULL;
1305 struct cmd_list_element *cmd = NULL;
1306 struct cmd_list_element *c;
1309 if (!lookup_cmd_composition (*text, &alias, &prefix_cmd, &cmd))
1310 /* return if text doesn't evaluate to a command */
1313 if (!((alias ? (alias->flags & DEPRECATED_WARN_USER) : 0)
1314 || (cmd->flags & DEPRECATED_WARN_USER) ) )
1315 /* return if nothing is deprecated */
1318 printf_filtered ("Warning:");
1320 if (alias && !(cmd->flags & CMD_DEPRECATED))
1321 printf_filtered (" '%s', an alias for the", alias->name);
1323 printf_filtered (" command '");
1326 printf_filtered ("%s", prefix_cmd->prefixname);
1328 printf_filtered ("%s", cmd->name);
1330 if (alias && (cmd->flags & CMD_DEPRECATED))
1331 printf_filtered ("' (%s) is deprecated.\n", alias->name);
1333 printf_filtered ("' is deprecated.\n");
1336 /* if it is only the alias that is deprecated, we want to indicate the
1337 new alias, otherwise we'll indicate the new command */
1339 if (alias && !(cmd->flags & CMD_DEPRECATED))
1341 if (alias->replacement)
1342 printf_filtered ("Use '%s'.\n\n", alias->replacement);
1344 printf_filtered ("No alternative known.\n\n");
1348 if (cmd->replacement)
1349 printf_filtered ("Use '%s'.\n\n", cmd->replacement);
1351 printf_filtered ("No alternative known.\n\n");
1354 /* We've warned you, now we'll keep quiet */
1356 alias->flags &= ~DEPRECATED_WARN_USER;
1358 cmd->flags &= ~DEPRECATED_WARN_USER;
1363 /* Look up the contents of LINE as a command in the command list 'cmdlist'.
1364 Return 1 on success, 0 on failure.
1366 If LINE refers to an alias, *alias will point to that alias.
1368 If LINE is a postfix command (i.e. one that is preceeded by a prefix
1369 command) set *prefix_cmd.
1371 Set *cmd to point to the command LINE indicates.
1373 If any of *alias, *prefix_cmd, or *cmd cannot be determined or do not
1374 exist, they are NULL when we return.
1378 lookup_cmd_composition (char *text,
1379 struct cmd_list_element **alias,
1380 struct cmd_list_element **prefix_cmd,
1381 struct cmd_list_element **cmd)
1384 int len, tmp, nfound;
1385 struct cmd_list_element *cur_list;
1386 struct cmd_list_element *prev_cmd;
1395 /* Go through as many command lists as we need to
1396 to find the command TEXT refers to. */
1400 while (*text == ' ' || *text == '\t')
1403 /* Treating underscores as part of command words is important
1404 so that "set args_foo()" doesn't get interpreted as
1405 "set args _foo()". */
1406 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1409 *p && (isalnum (*p) || *p == '-' || *p == '_' ||
1412 (*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
1414 (xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
1418 /* If nothing but whitespace, return. */
1424 /* text and p now bracket the first command word to lookup (and
1425 it's length is len). We copy this into a local temporary */
1427 command = (char *) alloca (len + 1);
1428 for (tmp = 0; tmp < len; tmp++)
1433 command[len] = '\0';
1438 *cmd = find_cmd (command, len, cur_list, 1, &nfound);
1440 /* We didn't find the command in the entered case, so lower case it
1443 if (!*cmd || nfound == 0)
1445 for (tmp = 0; tmp < len; tmp++)
1447 char x = command[tmp];
1448 command[tmp] = isupper (x) ? tolower (x) : x;
1450 *cmd = find_cmd (command, len, cur_list, 1, &nfound);
1453 if (*cmd == (struct cmd_list_element *) -1)
1455 return 0; /* ambiguous */
1459 return 0; /* nothing found */
1462 if ((*cmd)->cmd_pointer)
1464 /* cmd was actually an alias, we note that an alias was used
1465 (by assigning *alais) and we set *cmd.
1468 *cmd = (*cmd)->cmd_pointer;
1470 *prefix_cmd = prev_cmd;
1472 if ((*cmd)->prefixlist)
1473 cur_list = *(*cmd)->prefixlist;
1481 /* Helper function for SYMBOL_COMPLETION_FUNCTION. */
1483 /* Return a vector of char pointers which point to the different
1484 possible completions in LIST of TEXT.
1486 WORD points in the same buffer as TEXT, and completions should be
1487 returned relative to this position. For example, suppose TEXT is "foo"
1488 and we want to complete to "foobar". If WORD is "oo", return
1489 "oobar"; if WORD is "baz/foo", return "baz/foobar". */
1492 complete_on_cmdlist (struct cmd_list_element *list, char *text, char *word)
1494 struct cmd_list_element *ptr;
1496 int sizeof_matchlist;
1498 int textlen = strlen (text);
1500 sizeof_matchlist = 10;
1501 matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
1504 for (ptr = list; ptr; ptr = ptr->next)
1505 if (!strncmp (ptr->name, text, textlen)
1506 && !ptr->abbrev_flag
1508 || ptr->prefixlist))
1510 if (matches == sizeof_matchlist)
1512 sizeof_matchlist *= 2;
1513 matchlist = (char **) xrealloc ((char *) matchlist,
1515 * sizeof (char *)));
1518 matchlist[matches] = (char *)
1519 xmalloc (strlen (word) + strlen (ptr->name) + 1);
1521 strcpy (matchlist[matches], ptr->name);
1522 else if (word > text)
1524 /* Return some portion of ptr->name. */
1525 strcpy (matchlist[matches], ptr->name + (word - text));
1529 /* Return some of text plus ptr->name. */
1530 strncpy (matchlist[matches], word, text - word);
1531 matchlist[matches][text - word] = '\0';
1532 strcat (matchlist[matches], ptr->name);
1544 matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
1545 * sizeof (char *)));
1546 matchlist[matches] = (char *) 0;
1552 /* Helper function for SYMBOL_COMPLETION_FUNCTION. */
1554 /* Return a vector of char pointers which point to the different
1555 possible completions in CMD of TEXT.
1557 WORD points in the same buffer as TEXT, and completions should be
1558 returned relative to this position. For example, suppose TEXT is "foo"
1559 and we want to complete to "foobar". If WORD is "oo", return
1560 "oobar"; if WORD is "baz/foo", return "baz/foobar". */
1563 complete_on_enum (const char *enumlist[],
1568 int sizeof_matchlist;
1570 int textlen = strlen (text);
1574 sizeof_matchlist = 10;
1575 matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
1578 for (i = 0; (name = enumlist[i]) != NULL; i++)
1579 if (strncmp (name, text, textlen) == 0)
1581 if (matches == sizeof_matchlist)
1583 sizeof_matchlist *= 2;
1584 matchlist = (char **) xrealloc ((char *) matchlist,
1586 * sizeof (char *)));
1589 matchlist[matches] = (char *)
1590 xmalloc (strlen (word) + strlen (name) + 1);
1592 strcpy (matchlist[matches], name);
1593 else if (word > text)
1595 /* Return some portion of name. */
1596 strcpy (matchlist[matches], name + (word - text));
1600 /* Return some of text plus name. */
1601 strncpy (matchlist[matches], word, text - word);
1602 matchlist[matches][text - word] = '\0';
1603 strcat (matchlist[matches], name);
1615 matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
1616 * sizeof (char *)));
1617 matchlist[matches] = (char *) 0;
1624 /* check function pointer */
1626 cmd_func_p (struct cmd_list_element *cmd)
1628 return (cmd->func != NULL);
1632 /* call the command function */
1634 cmd_func (struct cmd_list_element *cmd, char *args, int from_tty)
1636 if (cmd_func_p (cmd))
1637 (*cmd->func) (cmd, args, from_tty);
1639 error (_("Invalid command"));