1447 lines
41 KiB
C
1447 lines
41 KiB
C
/* Handle lists of commands, their decoding and documentation, for GDB.
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Copyright 1986, 1989, 1990, 1991, 1998, 2000, 2001, 2002 Free
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Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include <ctype.h>
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#include "gdb_regex.h"
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#include "ui-out.h"
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#include "cli/cli-cmds.h"
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#include "cli/cli-decode.h"
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#include "gdb_assert.h"
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/* Prototypes for local functions */
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static void undef_cmd_error (char *, char *);
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static struct cmd_list_element *find_cmd (char *command,
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int len,
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struct cmd_list_element *clist,
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int ignore_help_classes,
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int *nfound);
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static void help_all (struct ui_file *stream);
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/* Set the callback function for the specified command. For each both
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the commands callback and func() are set. The latter set to a
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bounce function (unless cfunc / sfunc is NULL that is). */
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static void
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do_cfunc (struct cmd_list_element *c, char *args, int from_tty)
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{
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c->function.cfunc (args, from_tty); /* Ok. */
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}
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void
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set_cmd_cfunc (struct cmd_list_element *cmd,
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void (*cfunc) (char *args, int from_tty))
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{
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if (cfunc == NULL)
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cmd->func = NULL;
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else
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cmd->func = do_cfunc;
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cmd->function.cfunc = cfunc; /* Ok. */
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}
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static void
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do_sfunc (struct cmd_list_element *c, char *args, int from_tty)
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{
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c->function.sfunc (args, from_tty, c); /* Ok. */
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}
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void
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set_cmd_sfunc (struct cmd_list_element *cmd,
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void (*sfunc) (char *args, int from_tty,
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struct cmd_list_element * c))
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{
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if (sfunc == NULL)
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cmd->func = NULL;
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else
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cmd->func = do_sfunc;
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cmd->function.sfunc = sfunc; /* Ok. */
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}
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int
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cmd_cfunc_eq (struct cmd_list_element *cmd,
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void (*cfunc) (char *args, int from_tty))
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{
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return cmd->func == do_cfunc && cmd->function.cfunc == cfunc;
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}
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void
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set_cmd_context (struct cmd_list_element *cmd, void *context)
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{
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cmd->context = context;
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}
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void *
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get_cmd_context (struct cmd_list_element *cmd)
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{
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return cmd->context;
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}
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enum cmd_types
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cmd_type (struct cmd_list_element *cmd)
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{
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return cmd->type;
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}
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void
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set_cmd_completer (struct cmd_list_element *cmd,
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char **(*completer) (char *text, char *word))
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{
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cmd->completer = completer; /* Ok. */
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}
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/* Add element named NAME.
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CLASS is the top level category into which commands are broken down
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for "help" purposes.
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FUN should be the function to execute the command;
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it will get a character string as argument, with leading
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and trailing blanks already eliminated.
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DOC is a documentation string for the command.
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Its first line should be a complete sentence.
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It should start with ? for a command that is an abbreviation
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or with * for a command that most users don't need to know about.
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Add this command to command list *LIST.
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Returns a pointer to the added command (not necessarily the head
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of *LIST). */
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struct cmd_list_element *
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add_cmd (char *name, enum command_class class, void (*fun) (char *, int),
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char *doc, struct cmd_list_element **list)
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{
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register struct cmd_list_element *c
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= (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element));
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struct cmd_list_element *p;
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delete_cmd (name, list);
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if (*list == NULL || strcmp ((*list)->name, name) >= 0)
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{
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c->next = *list;
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*list = c;
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}
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else
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{
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p = *list;
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while (p->next && strcmp (p->next->name, name) <= 0)
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{
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p = p->next;
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}
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c->next = p->next;
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p->next = c;
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}
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c->name = name;
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c->class = class;
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set_cmd_cfunc (c, fun);
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set_cmd_context (c, NULL);
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c->doc = doc;
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c->flags = 0;
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c->replacement = NULL;
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c->pre_show_hook = NULL;
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c->hook_pre = NULL;
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c->hook_post = NULL;
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c->hook_in = 0;
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c->prefixlist = NULL;
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c->prefixname = NULL;
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c->allow_unknown = 0;
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c->abbrev_flag = 0;
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set_cmd_completer (c, make_symbol_completion_list);
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c->type = not_set_cmd;
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c->var = NULL;
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c->var_type = var_boolean;
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c->enums = NULL;
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c->user_commands = NULL;
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c->hookee_pre = NULL;
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c->hookee_post = NULL;
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c->cmd_pointer = NULL;
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return c;
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}
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/* Same as above, except that the abbrev_flag is set. */
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/* Note: Doesn't seem to be used anywhere currently. */
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struct cmd_list_element *
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add_abbrev_cmd (char *name, enum command_class class, void (*fun) (char *, int),
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char *doc, struct cmd_list_element **list)
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{
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register struct cmd_list_element *c
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= add_cmd (name, class, fun, doc, list);
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c->abbrev_flag = 1;
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return c;
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}
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/* Deprecates a command CMD.
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REPLACEMENT is the name of the command which should be used in place
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of this command, or NULL if no such command exists.
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This function does not check to see if command REPLACEMENT exists
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since gdb may not have gotten around to adding REPLACEMENT when this
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function is called.
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Returns a pointer to the deprecated command. */
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struct cmd_list_element *
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deprecate_cmd (struct cmd_list_element *cmd, char *replacement)
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{
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cmd->flags |= (CMD_DEPRECATED | DEPRECATED_WARN_USER);
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if (replacement != NULL)
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cmd->replacement = replacement;
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else
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cmd->replacement = NULL;
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return cmd;
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}
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struct cmd_list_element *
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add_alias_cmd (char *name, char *oldname, enum command_class class,
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int abbrev_flag, struct cmd_list_element **list)
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{
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/* Must do this since lookup_cmd tries to side-effect its first arg */
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char *copied_name;
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register struct cmd_list_element *old;
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register struct cmd_list_element *c;
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copied_name = (char *) alloca (strlen (oldname) + 1);
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strcpy (copied_name, oldname);
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old = lookup_cmd (&copied_name, *list, "", 1, 1);
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if (old == 0)
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{
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delete_cmd (name, list);
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return 0;
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}
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c = add_cmd (name, class, NULL, old->doc, list);
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/* NOTE: Both FUNC and all the FUNCTIONs need to be copied. */
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c->func = old->func;
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c->function = old->function;
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c->prefixlist = old->prefixlist;
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c->prefixname = old->prefixname;
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c->allow_unknown = old->allow_unknown;
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c->abbrev_flag = abbrev_flag;
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c->cmd_pointer = old;
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return c;
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}
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/* Like add_cmd but adds an element for a command prefix:
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a name that should be followed by a subcommand to be looked up
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in another command list. PREFIXLIST should be the address
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of the variable containing that list. */
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struct cmd_list_element *
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add_prefix_cmd (char *name, enum command_class class, void (*fun) (char *, int),
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char *doc, struct cmd_list_element **prefixlist,
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char *prefixname, int allow_unknown,
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struct cmd_list_element **list)
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{
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register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
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c->prefixlist = prefixlist;
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c->prefixname = prefixname;
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c->allow_unknown = allow_unknown;
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return c;
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}
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/* Like add_prefix_cmd but sets the abbrev_flag on the new command. */
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struct cmd_list_element *
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add_abbrev_prefix_cmd (char *name, enum command_class class,
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void (*fun) (char *, int), char *doc,
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struct cmd_list_element **prefixlist, char *prefixname,
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int allow_unknown, struct cmd_list_element **list)
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{
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register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list);
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c->prefixlist = prefixlist;
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c->prefixname = prefixname;
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c->allow_unknown = allow_unknown;
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c->abbrev_flag = 1;
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return c;
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}
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/* This is an empty "cfunc". */
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void
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not_just_help_class_command (char *args, int from_tty)
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{
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}
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/* This is an empty "sfunc". */
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static void empty_sfunc (char *, int, struct cmd_list_element *);
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static void
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empty_sfunc (char *args, int from_tty, struct cmd_list_element *c)
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{
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}
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/* Add element named NAME to command list LIST (the list for set/show
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or some sublist thereof).
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TYPE is set_cmd or show_cmd.
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CLASS is as in add_cmd.
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VAR_TYPE is the kind of thing we are setting.
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VAR is address of the variable being controlled by this command.
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DOC is the documentation string. */
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static struct cmd_list_element *
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add_set_or_show_cmd (char *name,
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enum cmd_types type,
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enum command_class class,
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var_types var_type,
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void *var,
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char *doc,
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struct cmd_list_element **list)
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{
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struct cmd_list_element *c = add_cmd (name, class, NULL, doc, list);
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gdb_assert (type == set_cmd || type == show_cmd);
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c->type = type;
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c->var_type = var_type;
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c->var = var;
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/* This needs to be something besides NULL so that this isn't
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treated as a help class. */
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set_cmd_sfunc (c, empty_sfunc);
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return c;
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}
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struct cmd_list_element *
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add_set_cmd (char *name,
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enum command_class class,
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var_types var_type,
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void *var,
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char *doc,
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struct cmd_list_element **list)
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{
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return add_set_or_show_cmd (name, set_cmd, class, var_type, var, doc, list);
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}
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/* Add element named NAME to command list LIST (the list for set
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or some sublist thereof).
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CLASS is as in add_cmd.
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ENUMLIST is a list of strings which may follow NAME.
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VAR is address of the variable which will contain the matching string
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(from ENUMLIST).
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DOC is the documentation string. */
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struct cmd_list_element *
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add_set_enum_cmd (char *name,
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enum command_class class,
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const char *enumlist[],
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const char **var,
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char *doc,
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struct cmd_list_element **list)
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{
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struct cmd_list_element *c
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= add_set_cmd (name, class, var_enum, var, doc, list);
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c->enums = enumlist;
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return c;
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}
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/* Add element named NAME to command list LIST (the list for set
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or some sublist thereof).
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CLASS is as in add_cmd.
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VAR is address of the variable which will contain the value.
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DOC is the documentation string. */
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struct cmd_list_element *
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add_set_auto_boolean_cmd (char *name,
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enum command_class class,
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enum cmd_auto_boolean *var,
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char *doc,
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struct cmd_list_element **list)
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{
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static const char *auto_boolean_enums[] = { "on", "off", "auto", NULL };
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struct cmd_list_element *c;
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c = add_set_cmd (name, class, var_auto_boolean, var, doc, list);
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c->enums = auto_boolean_enums;
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return c;
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}
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/* Add element named NAME to command list LIST (the list for set
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or some sublist thereof).
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CLASS is as in add_cmd.
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VAR is address of the variable which will contain the value.
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DOC is the documentation string. */
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struct cmd_list_element *
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add_set_boolean_cmd (char *name,
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enum command_class class,
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int *var,
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char *doc,
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struct cmd_list_element **list)
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{
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static const char *boolean_enums[] = { "on", "off", NULL };
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struct cmd_list_element *c;
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c = add_set_cmd (name, class, var_boolean, var, doc, list);
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c->enums = boolean_enums;
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return c;
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}
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/* Where SETCMD has already been added, add the corresponding show
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command to LIST and return a pointer to the added command (not
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necessarily the head of LIST). */
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/* NOTE: cagney/2002-03-17: The original version of add_show_from_set
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used memcpy() to clone `set' into `show'. This ment that in
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addition to all the needed fields (var, name, et.al.) some
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unnecessary fields were copied (namely the callback function). The
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function explictly copies relevant fields. For a `set' and `show'
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command to share the same callback, the caller must set both
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explicitly. */
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struct cmd_list_element *
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add_show_from_set (struct cmd_list_element *setcmd,
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struct cmd_list_element **list)
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{
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||
char *doc;
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const static char setstring[] = "Set ";
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||
|
||
/* Create a doc string by replacing "Set " at the start of the
|
||
`set'' command's doco with "Show ". */
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gdb_assert (strncmp (setcmd->doc, setstring, sizeof (setstring) - 1) == 0);
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doc = concat ("Show ", setcmd->doc + sizeof (setstring) - 1, NULL);
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||
|
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/* Insert the basic command. */
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return add_set_or_show_cmd (setcmd->name, show_cmd, setcmd->class,
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setcmd->var_type, setcmd->var, doc, list);
|
||
}
|
||
|
||
/* Remove the command named NAME from the command list. */
|
||
|
||
void
|
||
delete_cmd (char *name, struct cmd_list_element **list)
|
||
{
|
||
register struct cmd_list_element *c;
|
||
struct cmd_list_element *p;
|
||
|
||
while (*list && STREQ ((*list)->name, name))
|
||
{
|
||
if ((*list)->hookee_pre)
|
||
(*list)->hookee_pre->hook_pre = 0; /* Hook slips out of its mouth */
|
||
if ((*list)->hookee_post)
|
||
(*list)->hookee_post->hook_post = 0; /* Hook slips out of its bottom */
|
||
p = (*list)->next;
|
||
xfree (* list);
|
||
*list = p;
|
||
}
|
||
|
||
if (*list)
|
||
for (c = *list; c->next;)
|
||
{
|
||
if (STREQ (c->next->name, name))
|
||
{
|
||
if (c->next->hookee_pre)
|
||
c->next->hookee_pre->hook_pre = 0; /* hooked cmd gets away. */
|
||
if (c->next->hookee_post)
|
||
c->next->hookee_post->hook_post = 0; /* remove post hook */
|
||
/* :( no fishing metaphore */
|
||
p = c->next->next;
|
||
xfree (c->next);
|
||
c->next = p;
|
||
}
|
||
else
|
||
c = c->next;
|
||
}
|
||
}
|
||
|
||
/* Shorthands to the commands above. */
|
||
|
||
/* Add an element to the list of info subcommands. */
|
||
|
||
struct cmd_list_element *
|
||
add_info (char *name, void (*fun) (char *, int), char *doc)
|
||
{
|
||
return add_cmd (name, no_class, fun, doc, &infolist);
|
||
}
|
||
|
||
/* Add an alias to the list of info subcommands. */
|
||
|
||
struct cmd_list_element *
|
||
add_info_alias (char *name, char *oldname, int abbrev_flag)
|
||
{
|
||
return add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
|
||
}
|
||
|
||
/* Add an element to the list of commands. */
|
||
|
||
struct cmd_list_element *
|
||
add_com (char *name, enum command_class class, void (*fun) (char *, int),
|
||
char *doc)
|
||
{
|
||
return add_cmd (name, class, fun, doc, &cmdlist);
|
||
}
|
||
|
||
/* Add an alias or abbreviation command to the list of commands. */
|
||
|
||
struct cmd_list_element *
|
||
add_com_alias (char *name, char *oldname, enum command_class class,
|
||
int abbrev_flag)
|
||
{
|
||
return add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
|
||
}
|
||
|
||
/* Recursively walk the commandlist structures, and print out the
|
||
documentation of commands that match our regex in either their
|
||
name, or their documentation.
|
||
*/
|
||
void
|
||
apropos_cmd (struct ui_file *stream, struct cmd_list_element *commandlist,
|
||
struct re_pattern_buffer *regex, char *prefix)
|
||
{
|
||
register struct cmd_list_element *c;
|
||
int returnvalue=1; /*Needed to avoid double printing*/
|
||
/* Walk through the commands */
|
||
for (c=commandlist;c;c=c->next)
|
||
{
|
||
if (c->name != NULL)
|
||
{
|
||
/* Try to match against the name*/
|
||
returnvalue=re_search(regex,c->name,strlen(c->name),0,strlen(c->name),NULL);
|
||
if (returnvalue >= 0)
|
||
{
|
||
/* Stolen from help_cmd_list. We don't directly use
|
||
* help_cmd_list because it doesn't let us print out
|
||
* single commands
|
||
*/
|
||
fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
|
||
print_doc_line (stream, c->doc);
|
||
fputs_filtered ("\n", stream);
|
||
returnvalue=0; /*Set this so we don't print it again.*/
|
||
}
|
||
}
|
||
if (c->doc != NULL && returnvalue != 0)
|
||
{
|
||
/* Try to match against documentation */
|
||
if (re_search(regex,c->doc,strlen(c->doc),0,strlen(c->doc),NULL) >=0)
|
||
{
|
||
/* Stolen from help_cmd_list. We don't directly use
|
||
* help_cmd_list because it doesn't let us print out
|
||
* single commands
|
||
*/
|
||
fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
|
||
print_doc_line (stream, c->doc);
|
||
fputs_filtered ("\n", stream);
|
||
}
|
||
}
|
||
/* Check if this command has subcommands */
|
||
if (c->prefixlist != NULL)
|
||
{
|
||
/* Recursively call ourselves on the subcommand list,
|
||
passing the right prefix in.
|
||
*/
|
||
apropos_cmd (stream,*c->prefixlist,regex,c->prefixname);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* This command really has to deal with two things:
|
||
* 1) I want documentation on *this string* (usually called by
|
||
* "help commandname").
|
||
* 2) I want documentation on *this list* (usually called by
|
||
* giving a command that requires subcommands. Also called by saying
|
||
* just "help".)
|
||
*
|
||
* I am going to split this into two seperate comamnds, help_cmd and
|
||
* help_list.
|
||
*/
|
||
|
||
void
|
||
help_cmd (char *command, struct ui_file *stream)
|
||
{
|
||
struct cmd_list_element *c;
|
||
extern struct cmd_list_element *cmdlist;
|
||
|
||
if (!command)
|
||
{
|
||
help_list (cmdlist, "", all_classes, stream);
|
||
return;
|
||
}
|
||
|
||
if (strcmp (command, "all") == 0)
|
||
{
|
||
help_all (stream);
|
||
return;
|
||
}
|
||
|
||
c = lookup_cmd (&command, cmdlist, "", 0, 0);
|
||
|
||
if (c == 0)
|
||
return;
|
||
|
||
/* There are three cases here.
|
||
If c->prefixlist is nonzero, we have a prefix command.
|
||
Print its documentation, then list its subcommands.
|
||
|
||
If c->func is non NULL, we really have a command. Print its
|
||
documentation and return.
|
||
|
||
If c->func is NULL, we have a class name. Print its
|
||
documentation (as if it were a command) and then set class to the
|
||
number of this class so that the commands in the class will be
|
||
listed. */
|
||
|
||
fputs_filtered (c->doc, stream);
|
||
fputs_filtered ("\n", stream);
|
||
|
||
if (c->prefixlist == 0 && c->func != NULL)
|
||
return;
|
||
fprintf_filtered (stream, "\n");
|
||
|
||
/* If this is a prefix command, print it's subcommands */
|
||
if (c->prefixlist)
|
||
help_list (*c->prefixlist, c->prefixname, all_commands, stream);
|
||
|
||
/* If this is a class name, print all of the commands in the class */
|
||
if (c->func == NULL)
|
||
help_list (cmdlist, "", c->class, stream);
|
||
|
||
if (c->hook_pre || c->hook_post)
|
||
fprintf_filtered (stream,
|
||
"\nThis command has a hook (or hooks) defined:\n");
|
||
|
||
if (c->hook_pre)
|
||
fprintf_filtered (stream,
|
||
"\tThis command is run after : %s (pre hook)\n",
|
||
c->hook_pre->name);
|
||
if (c->hook_post)
|
||
fprintf_filtered (stream,
|
||
"\tThis command is run before : %s (post hook)\n",
|
||
c->hook_post->name);
|
||
}
|
||
|
||
/*
|
||
* Get a specific kind of help on a command list.
|
||
*
|
||
* LIST is the list.
|
||
* CMDTYPE is the prefix to use in the title string.
|
||
* CLASS is the class with which to list the nodes of this list (see
|
||
* documentation for help_cmd_list below), As usual, ALL_COMMANDS for
|
||
* everything, ALL_CLASSES for just classes, and non-negative for only things
|
||
* in a specific class.
|
||
* and STREAM is the output stream on which to print things.
|
||
* If you call this routine with a class >= 0, it recurses.
|
||
*/
|
||
void
|
||
help_list (struct cmd_list_element *list, char *cmdtype,
|
||
enum command_class class, struct ui_file *stream)
|
||
{
|
||
int len;
|
||
char *cmdtype1, *cmdtype2;
|
||
|
||
/* If CMDTYPE is "foo ", CMDTYPE1 gets " foo" and CMDTYPE2 gets "foo sub" */
|
||
len = strlen (cmdtype);
|
||
cmdtype1 = (char *) alloca (len + 1);
|
||
cmdtype1[0] = 0;
|
||
cmdtype2 = (char *) alloca (len + 4);
|
||
cmdtype2[0] = 0;
|
||
if (len)
|
||
{
|
||
cmdtype1[0] = ' ';
|
||
strncpy (cmdtype1 + 1, cmdtype, len - 1);
|
||
cmdtype1[len] = 0;
|
||
strncpy (cmdtype2, cmdtype, len - 1);
|
||
strcpy (cmdtype2 + len - 1, " sub");
|
||
}
|
||
|
||
if (class == all_classes)
|
||
fprintf_filtered (stream, "List of classes of %scommands:\n\n", cmdtype2);
|
||
else
|
||
fprintf_filtered (stream, "List of %scommands:\n\n", cmdtype2);
|
||
|
||
help_cmd_list (list, class, cmdtype, (int) class >= 0, stream);
|
||
|
||
if (class == all_classes)
|
||
{
|
||
fprintf_filtered (stream, "\n\
|
||
Type \"help%s\" followed by a class name for a list of commands in ",
|
||
cmdtype1);
|
||
wrap_here ("");
|
||
fprintf_filtered (stream, "that class.");
|
||
}
|
||
|
||
fprintf_filtered (stream, "\nType \"help%s\" followed by %scommand name ",
|
||
cmdtype1, cmdtype2);
|
||
wrap_here ("");
|
||
fputs_filtered ("for ", stream);
|
||
wrap_here ("");
|
||
fputs_filtered ("full ", stream);
|
||
wrap_here ("");
|
||
fputs_filtered ("documentation.\n", stream);
|
||
fputs_filtered ("Command name abbreviations are allowed if unambiguous.\n",
|
||
stream);
|
||
}
|
||
|
||
static void
|
||
help_all (struct ui_file *stream)
|
||
{
|
||
struct cmd_list_element *c;
|
||
extern struct cmd_list_element *cmdlist;
|
||
|
||
for (c = cmdlist; c; c = c->next)
|
||
{
|
||
if (c->abbrev_flag)
|
||
continue;
|
||
/* If this is a prefix command, print it's subcommands */
|
||
if (c->prefixlist)
|
||
help_cmd_list (*c->prefixlist, all_commands, c->prefixname, 0, stream);
|
||
|
||
/* If this is a class name, print all of the commands in the class */
|
||
else if (c->func == NULL)
|
||
help_cmd_list (cmdlist, c->class, "", 0, stream);
|
||
}
|
||
}
|
||
|
||
/* Print only the first line of STR on STREAM. */
|
||
void
|
||
print_doc_line (struct ui_file *stream, char *str)
|
||
{
|
||
static char *line_buffer = 0;
|
||
static int line_size;
|
||
register char *p;
|
||
|
||
if (!line_buffer)
|
||
{
|
||
line_size = 80;
|
||
line_buffer = (char *) xmalloc (line_size);
|
||
}
|
||
|
||
p = str;
|
||
while (*p && *p != '\n' && *p != '.' && *p != ',')
|
||
p++;
|
||
if (p - str > line_size - 1)
|
||
{
|
||
line_size = p - str + 1;
|
||
xfree (line_buffer);
|
||
line_buffer = (char *) xmalloc (line_size);
|
||
}
|
||
strncpy (line_buffer, str, p - str);
|
||
line_buffer[p - str] = '\0';
|
||
if (islower (line_buffer[0]))
|
||
line_buffer[0] = toupper (line_buffer[0]);
|
||
ui_out_text (uiout, line_buffer);
|
||
}
|
||
|
||
/*
|
||
* Implement a help command on command list LIST.
|
||
* RECURSE should be non-zero if this should be done recursively on
|
||
* all sublists of LIST.
|
||
* PREFIX is the prefix to print before each command name.
|
||
* STREAM is the stream upon which the output should be written.
|
||
* CLASS should be:
|
||
* A non-negative class number to list only commands in that
|
||
* class.
|
||
* ALL_COMMANDS to list all commands in list.
|
||
* ALL_CLASSES to list all classes in list.
|
||
*
|
||
* Note that RECURSE will be active on *all* sublists, not just the
|
||
* ones selected by the criteria above (ie. the selection mechanism
|
||
* is at the low level, not the high-level).
|
||
*/
|
||
void
|
||
help_cmd_list (struct cmd_list_element *list, enum command_class class,
|
||
char *prefix, int recurse, struct ui_file *stream)
|
||
{
|
||
register struct cmd_list_element *c;
|
||
|
||
for (c = list; c; c = c->next)
|
||
{
|
||
if (c->abbrev_flag == 0 &&
|
||
(class == all_commands
|
||
|| (class == all_classes && c->func == NULL)
|
||
|| (class == c->class && c->func != NULL)))
|
||
{
|
||
fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
|
||
print_doc_line (stream, c->doc);
|
||
fputs_filtered ("\n", stream);
|
||
}
|
||
if (recurse
|
||
&& c->prefixlist != 0
|
||
&& c->abbrev_flag == 0)
|
||
help_cmd_list (*c->prefixlist, class, c->prefixname, 1, stream);
|
||
}
|
||
}
|
||
|
||
|
||
/* Search the input clist for 'command'. Return the command if
|
||
found (or NULL if not), and return the number of commands
|
||
found in nfound */
|
||
|
||
static struct cmd_list_element *
|
||
find_cmd (char *command, int len, struct cmd_list_element *clist,
|
||
int ignore_help_classes, int *nfound)
|
||
{
|
||
struct cmd_list_element *found, *c;
|
||
|
||
found = (struct cmd_list_element *) NULL;
|
||
*nfound = 0;
|
||
for (c = clist; c; c = c->next)
|
||
if (!strncmp (command, c->name, len)
|
||
&& (!ignore_help_classes || c->func))
|
||
{
|
||
found = c;
|
||
(*nfound)++;
|
||
if (c->name[len] == '\0')
|
||
{
|
||
*nfound = 1;
|
||
break;
|
||
}
|
||
}
|
||
return found;
|
||
}
|
||
|
||
/* This routine takes a line of TEXT and a CLIST in which to start the
|
||
lookup. When it returns it will have incremented the text pointer past
|
||
the section of text it matched, set *RESULT_LIST to point to the list in
|
||
which the last word was matched, and will return a pointer to the cmd
|
||
list element which the text matches. It will return NULL if no match at
|
||
all was possible. It will return -1 (cast appropriately, ick) if ambigous
|
||
matches are possible; in this case *RESULT_LIST will be set to point to
|
||
the list in which there are ambiguous choices (and *TEXT will be set to
|
||
the ambiguous text string).
|
||
|
||
If the located command was an abbreviation, this routine returns the base
|
||
command of the abbreviation.
|
||
|
||
It does no error reporting whatsoever; control will always return
|
||
to the superior routine.
|
||
|
||
In the case of an ambiguous return (-1), *RESULT_LIST will be set to point
|
||
at the prefix_command (ie. the best match) *or* (special case) will be NULL
|
||
if no prefix command was ever found. For example, in the case of "info a",
|
||
"info" matches without ambiguity, but "a" could be "args" or "address", so
|
||
*RESULT_LIST is set to the cmd_list_element for "info". So in this case
|
||
RESULT_LIST should not be interpeted as a pointer to the beginning of a
|
||
list; it simply points to a specific command. In the case of an ambiguous
|
||
return *TEXT is advanced past the last non-ambiguous prefix (e.g.
|
||
"info t" can be "info types" or "info target"; upon return *TEXT has been
|
||
advanced past "info ").
|
||
|
||
If RESULT_LIST is NULL, don't set *RESULT_LIST (but don't otherwise
|
||
affect the operation).
|
||
|
||
This routine does *not* modify the text pointed to by TEXT.
|
||
|
||
If IGNORE_HELP_CLASSES is nonzero, ignore any command list elements which
|
||
are actually help classes rather than commands (i.e. the function field of
|
||
the struct cmd_list_element is NULL). */
|
||
|
||
struct cmd_list_element *
|
||
lookup_cmd_1 (char **text, struct cmd_list_element *clist,
|
||
struct cmd_list_element **result_list, int ignore_help_classes)
|
||
{
|
||
char *p, *command;
|
||
int len, tmp, nfound;
|
||
struct cmd_list_element *found, *c;
|
||
char *line = *text;
|
||
|
||
while (**text == ' ' || **text == '\t')
|
||
(*text)++;
|
||
|
||
/* Treating underscores as part of command words is important
|
||
so that "set args_foo()" doesn't get interpreted as
|
||
"set args _foo()". */
|
||
for (p = *text;
|
||
*p && (isalnum (*p) || *p == '-' || *p == '_' ||
|
||
(tui_version &&
|
||
(*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
|
||
(xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
|
||
p++)
|
||
;
|
||
|
||
/* If nothing but whitespace, return 0. */
|
||
if (p == *text)
|
||
return 0;
|
||
|
||
len = p - *text;
|
||
|
||
/* *text and p now bracket the first command word to lookup (and
|
||
it's length is len). We copy this into a local temporary */
|
||
|
||
|
||
command = (char *) alloca (len + 1);
|
||
for (tmp = 0; tmp < len; tmp++)
|
||
{
|
||
char x = (*text)[tmp];
|
||
command[tmp] = x;
|
||
}
|
||
command[len] = '\0';
|
||
|
||
/* Look it up. */
|
||
found = 0;
|
||
nfound = 0;
|
||
found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
|
||
|
||
/*
|
||
** We didn't find the command in the entered case, so lower case it
|
||
** and search again.
|
||
*/
|
||
if (!found || nfound == 0)
|
||
{
|
||
for (tmp = 0; tmp < len; tmp++)
|
||
{
|
||
char x = command[tmp];
|
||
command[tmp] = isupper (x) ? tolower (x) : x;
|
||
}
|
||
found = find_cmd (command, len, clist, ignore_help_classes, &nfound);
|
||
}
|
||
|
||
/* If nothing matches, we have a simple failure. */
|
||
if (nfound == 0)
|
||
return 0;
|
||
|
||
if (nfound > 1)
|
||
{
|
||
if (result_list != NULL)
|
||
/* Will be modified in calling routine
|
||
if we know what the prefix command is. */
|
||
*result_list = 0;
|
||
return (struct cmd_list_element *) -1; /* Ambiguous. */
|
||
}
|
||
|
||
/* We've matched something on this list. Move text pointer forward. */
|
||
|
||
*text = p;
|
||
|
||
if (found->cmd_pointer)
|
||
{
|
||
/* We drop the alias (abbreviation) in favor of the command it is
|
||
pointing to. If the alias is deprecated, though, we need to
|
||
warn the user about it before we drop it. Note that while we
|
||
are warning about the alias, we may also warn about the command
|
||
itself and we will adjust the appropriate DEPRECATED_WARN_USER
|
||
flags */
|
||
|
||
if (found->flags & DEPRECATED_WARN_USER)
|
||
deprecated_cmd_warning (&line);
|
||
found = found->cmd_pointer;
|
||
}
|
||
/* If we found a prefix command, keep looking. */
|
||
|
||
if (found->prefixlist)
|
||
{
|
||
c = lookup_cmd_1 (text, *found->prefixlist, result_list,
|
||
ignore_help_classes);
|
||
if (!c)
|
||
{
|
||
/* Didn't find anything; this is as far as we got. */
|
||
if (result_list != NULL)
|
||
*result_list = clist;
|
||
return found;
|
||
}
|
||
else if (c == (struct cmd_list_element *) -1)
|
||
{
|
||
/* We've gotten this far properly, but the next step
|
||
is ambiguous. We need to set the result list to the best
|
||
we've found (if an inferior hasn't already set it). */
|
||
if (result_list != NULL)
|
||
if (!*result_list)
|
||
/* This used to say *result_list = *found->prefixlist
|
||
If that was correct, need to modify the documentation
|
||
at the top of this function to clarify what is supposed
|
||
to be going on. */
|
||
*result_list = found;
|
||
return c;
|
||
}
|
||
else
|
||
{
|
||
/* We matched! */
|
||
return c;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (result_list != NULL)
|
||
*result_list = clist;
|
||
return found;
|
||
}
|
||
}
|
||
|
||
/* All this hair to move the space to the front of cmdtype */
|
||
|
||
static void
|
||
undef_cmd_error (char *cmdtype, char *q)
|
||
{
|
||
error ("Undefined %scommand: \"%s\". Try \"help%s%.*s\".",
|
||
cmdtype,
|
||
q,
|
||
*cmdtype ? " " : "",
|
||
(int) strlen (cmdtype) - 1,
|
||
cmdtype);
|
||
}
|
||
|
||
/* Look up the contents of *LINE as a command in the command list LIST.
|
||
LIST is a chain of struct cmd_list_element's.
|
||
If it is found, return the struct cmd_list_element for that command
|
||
and update *LINE to point after the command name, at the first argument.
|
||
If not found, call error if ALLOW_UNKNOWN is zero
|
||
otherwise (or if error returns) return zero.
|
||
Call error if specified command is ambiguous,
|
||
unless ALLOW_UNKNOWN is negative.
|
||
CMDTYPE precedes the word "command" in the error message.
|
||
|
||
If INGNORE_HELP_CLASSES is nonzero, ignore any command list
|
||
elements which are actually help classes rather than commands (i.e.
|
||
the function field of the struct cmd_list_element is 0). */
|
||
|
||
struct cmd_list_element *
|
||
lookup_cmd (char **line, struct cmd_list_element *list, char *cmdtype,
|
||
int allow_unknown, int ignore_help_classes)
|
||
{
|
||
struct cmd_list_element *last_list = 0;
|
||
struct cmd_list_element *c =
|
||
lookup_cmd_1 (line, list, &last_list, ignore_help_classes);
|
||
|
||
/* Note: Do not remove trailing whitespace here because this
|
||
would be wrong for complete_command. Jim Kingdon */
|
||
|
||
if (!c)
|
||
{
|
||
if (!allow_unknown)
|
||
{
|
||
if (!*line)
|
||
error ("Lack of needed %scommand", cmdtype);
|
||
else
|
||
{
|
||
char *p = *line, *q;
|
||
|
||
while (isalnum (*p) || *p == '-')
|
||
p++;
|
||
|
||
q = (char *) alloca (p - *line + 1);
|
||
strncpy (q, *line, p - *line);
|
||
q[p - *line] = '\0';
|
||
undef_cmd_error (cmdtype, q);
|
||
}
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
else if (c == (struct cmd_list_element *) -1)
|
||
{
|
||
/* Ambigous. Local values should be off prefixlist or called
|
||
values. */
|
||
int local_allow_unknown = (last_list ? last_list->allow_unknown :
|
||
allow_unknown);
|
||
char *local_cmdtype = last_list ? last_list->prefixname : cmdtype;
|
||
struct cmd_list_element *local_list =
|
||
(last_list ? *(last_list->prefixlist) : list);
|
||
|
||
if (local_allow_unknown < 0)
|
||
{
|
||
if (last_list)
|
||
return last_list; /* Found something. */
|
||
else
|
||
return 0; /* Found nothing. */
|
||
}
|
||
else
|
||
{
|
||
/* Report as error. */
|
||
int amb_len;
|
||
char ambbuf[100];
|
||
|
||
for (amb_len = 0;
|
||
((*line)[amb_len] && (*line)[amb_len] != ' '
|
||
&& (*line)[amb_len] != '\t');
|
||
amb_len++)
|
||
;
|
||
|
||
ambbuf[0] = 0;
|
||
for (c = local_list; c; c = c->next)
|
||
if (!strncmp (*line, c->name, amb_len))
|
||
{
|
||
if (strlen (ambbuf) + strlen (c->name) + 6 < (int) sizeof ambbuf)
|
||
{
|
||
if (strlen (ambbuf))
|
||
strcat (ambbuf, ", ");
|
||
strcat (ambbuf, c->name);
|
||
}
|
||
else
|
||
{
|
||
strcat (ambbuf, "..");
|
||
break;
|
||
}
|
||
}
|
||
error ("Ambiguous %scommand \"%s\": %s.", local_cmdtype,
|
||
*line, ambbuf);
|
||
return 0; /* lint */
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We've got something. It may still not be what the caller
|
||
wants (if this command *needs* a subcommand). */
|
||
while (**line == ' ' || **line == '\t')
|
||
(*line)++;
|
||
|
||
if (c->prefixlist && **line && !c->allow_unknown)
|
||
undef_cmd_error (c->prefixname, *line);
|
||
|
||
/* Seems to be what he wants. Return it. */
|
||
return c;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* We are here presumably because an alias or command in *TEXT is
|
||
deprecated and a warning message should be generated. This function
|
||
decodes *TEXT and potentially generates a warning message as outlined
|
||
below.
|
||
|
||
Example for 'set endian big' which has a fictitious alias 'seb'.
|
||
|
||
If alias wasn't used in *TEXT, and the command is deprecated:
|
||
"warning: 'set endian big' is deprecated."
|
||
|
||
If alias was used, and only the alias is deprecated:
|
||
"warning: 'seb' an alias for the command 'set endian big' is deprecated."
|
||
|
||
If alias was used and command is deprecated (regardless of whether the
|
||
alias itself is deprecated:
|
||
|
||
"warning: 'set endian big' (seb) is deprecated."
|
||
|
||
After the message has been sent, clear the appropriate flags in the
|
||
command and/or the alias so the user is no longer bothered.
|
||
|
||
*/
|
||
void
|
||
deprecated_cmd_warning (char **text)
|
||
{
|
||
struct cmd_list_element *alias = NULL;
|
||
struct cmd_list_element *prefix_cmd = NULL;
|
||
struct cmd_list_element *cmd = NULL;
|
||
struct cmd_list_element *c;
|
||
char *type;
|
||
|
||
if (!lookup_cmd_composition (*text, &alias, &prefix_cmd, &cmd))
|
||
/* return if text doesn't evaluate to a command */
|
||
return;
|
||
|
||
if (!((alias ? (alias->flags & DEPRECATED_WARN_USER) : 0)
|
||
|| (cmd->flags & DEPRECATED_WARN_USER) ) )
|
||
/* return if nothing is deprecated */
|
||
return;
|
||
|
||
printf_filtered ("Warning:");
|
||
|
||
if (alias && !(cmd->flags & CMD_DEPRECATED))
|
||
printf_filtered (" '%s', an alias for the", alias->name);
|
||
|
||
printf_filtered (" command '");
|
||
|
||
if (prefix_cmd)
|
||
printf_filtered ("%s", prefix_cmd->prefixname);
|
||
|
||
printf_filtered ("%s", cmd->name);
|
||
|
||
if (alias && (cmd->flags & CMD_DEPRECATED))
|
||
printf_filtered ("' (%s) is deprecated.\n", alias->name);
|
||
else
|
||
printf_filtered ("' is deprecated.\n");
|
||
|
||
|
||
/* if it is only the alias that is deprecated, we want to indicate the
|
||
new alias, otherwise we'll indicate the new command */
|
||
|
||
if (alias && !(cmd->flags & CMD_DEPRECATED))
|
||
{
|
||
if (alias->replacement)
|
||
printf_filtered ("Use '%s'.\n\n", alias->replacement);
|
||
else
|
||
printf_filtered ("No alternative known.\n\n");
|
||
}
|
||
else
|
||
{
|
||
if (cmd->replacement)
|
||
printf_filtered ("Use '%s'.\n\n", cmd->replacement);
|
||
else
|
||
printf_filtered ("No alternative known.\n\n");
|
||
}
|
||
|
||
/* We've warned you, now we'll keep quiet */
|
||
if (alias)
|
||
alias->flags &= ~DEPRECATED_WARN_USER;
|
||
|
||
cmd->flags &= ~DEPRECATED_WARN_USER;
|
||
}
|
||
|
||
|
||
|
||
/* Look up the contents of LINE as a command in the command list 'cmdlist'.
|
||
Return 1 on success, 0 on failure.
|
||
|
||
If LINE refers to an alias, *alias will point to that alias.
|
||
|
||
If LINE is a postfix command (i.e. one that is preceeded by a prefix
|
||
command) set *prefix_cmd.
|
||
|
||
Set *cmd to point to the command LINE indicates.
|
||
|
||
If any of *alias, *prefix_cmd, or *cmd cannot be determined or do not
|
||
exist, they are NULL when we return.
|
||
|
||
*/
|
||
int
|
||
lookup_cmd_composition (char *text,
|
||
struct cmd_list_element **alias,
|
||
struct cmd_list_element **prefix_cmd,
|
||
struct cmd_list_element **cmd)
|
||
{
|
||
char *p, *command;
|
||
int len, tmp, nfound;
|
||
struct cmd_list_element *cur_list;
|
||
struct cmd_list_element *prev_cmd;
|
||
*alias = NULL;
|
||
*prefix_cmd = NULL;
|
||
*cmd = NULL;
|
||
|
||
cur_list = cmdlist;
|
||
|
||
while (1)
|
||
{
|
||
/* Go through as many command lists as we need to
|
||
to find the command TEXT refers to. */
|
||
|
||
prev_cmd = *cmd;
|
||
|
||
while (*text == ' ' || *text == '\t')
|
||
(text)++;
|
||
|
||
/* Treating underscores as part of command words is important
|
||
so that "set args_foo()" doesn't get interpreted as
|
||
"set args _foo()". */
|
||
for (p = text;
|
||
*p && (isalnum (*p) || *p == '-' || *p == '_' ||
|
||
(tui_version &&
|
||
(*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
|
||
(xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
|
||
p++)
|
||
;
|
||
|
||
/* If nothing but whitespace, return. */
|
||
if (p == text)
|
||
return 0;
|
||
|
||
len = p - text;
|
||
|
||
/* text and p now bracket the first command word to lookup (and
|
||
it's length is len). We copy this into a local temporary */
|
||
|
||
command = (char *) alloca (len + 1);
|
||
for (tmp = 0; tmp < len; tmp++)
|
||
{
|
||
char x = text[tmp];
|
||
command[tmp] = x;
|
||
}
|
||
command[len] = '\0';
|
||
|
||
/* Look it up. */
|
||
*cmd = 0;
|
||
nfound = 0;
|
||
*cmd = find_cmd (command, len, cur_list, 1, &nfound);
|
||
|
||
/* We didn't find the command in the entered case, so lower case it
|
||
and search again.
|
||
*/
|
||
if (!*cmd || nfound == 0)
|
||
{
|
||
for (tmp = 0; tmp < len; tmp++)
|
||
{
|
||
char x = command[tmp];
|
||
command[tmp] = isupper (x) ? tolower (x) : x;
|
||
}
|
||
*cmd = find_cmd (command, len, cur_list, 1, &nfound);
|
||
}
|
||
|
||
if (*cmd == (struct cmd_list_element *) -1)
|
||
{
|
||
return 0; /* ambiguous */
|
||
}
|
||
|
||
if (*cmd == NULL)
|
||
return 0; /* nothing found */
|
||
else
|
||
{
|
||
if ((*cmd)->cmd_pointer)
|
||
{
|
||
/* cmd was actually an alias, we note that an alias was used
|
||
(by assigning *alais) and we set *cmd.
|
||
*/
|
||
*alias = *cmd;
|
||
*cmd = (*cmd)->cmd_pointer;
|
||
}
|
||
*prefix_cmd = prev_cmd;
|
||
}
|
||
if ((*cmd)->prefixlist)
|
||
cur_list = *(*cmd)->prefixlist;
|
||
else
|
||
return 1;
|
||
|
||
text = p;
|
||
}
|
||
}
|
||
|
||
/* Helper function for SYMBOL_COMPLETION_FUNCTION. */
|
||
|
||
/* Return a vector of char pointers which point to the different
|
||
possible completions in LIST of TEXT.
|
||
|
||
WORD points in the same buffer as TEXT, and completions should be
|
||
returned relative to this position. For example, suppose TEXT is "foo"
|
||
and we want to complete to "foobar". If WORD is "oo", return
|
||
"oobar"; if WORD is "baz/foo", return "baz/foobar". */
|
||
|
||
char **
|
||
complete_on_cmdlist (struct cmd_list_element *list, char *text, char *word)
|
||
{
|
||
struct cmd_list_element *ptr;
|
||
char **matchlist;
|
||
int sizeof_matchlist;
|
||
int matches;
|
||
int textlen = strlen (text);
|
||
|
||
sizeof_matchlist = 10;
|
||
matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
|
||
matches = 0;
|
||
|
||
for (ptr = list; ptr; ptr = ptr->next)
|
||
if (!strncmp (ptr->name, text, textlen)
|
||
&& !ptr->abbrev_flag
|
||
&& (ptr->func
|
||
|| ptr->prefixlist))
|
||
{
|
||
if (matches == sizeof_matchlist)
|
||
{
|
||
sizeof_matchlist *= 2;
|
||
matchlist = (char **) xrealloc ((char *) matchlist,
|
||
(sizeof_matchlist
|
||
* sizeof (char *)));
|
||
}
|
||
|
||
matchlist[matches] = (char *)
|
||
xmalloc (strlen (word) + strlen (ptr->name) + 1);
|
||
if (word == text)
|
||
strcpy (matchlist[matches], ptr->name);
|
||
else if (word > text)
|
||
{
|
||
/* Return some portion of ptr->name. */
|
||
strcpy (matchlist[matches], ptr->name + (word - text));
|
||
}
|
||
else
|
||
{
|
||
/* Return some of text plus ptr->name. */
|
||
strncpy (matchlist[matches], word, text - word);
|
||
matchlist[matches][text - word] = '\0';
|
||
strcat (matchlist[matches], ptr->name);
|
||
}
|
||
++matches;
|
||
}
|
||
|
||
if (matches == 0)
|
||
{
|
||
xfree (matchlist);
|
||
matchlist = 0;
|
||
}
|
||
else
|
||
{
|
||
matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
|
||
* sizeof (char *)));
|
||
matchlist[matches] = (char *) 0;
|
||
}
|
||
|
||
return matchlist;
|
||
}
|
||
|
||
/* Helper function for SYMBOL_COMPLETION_FUNCTION. */
|
||
|
||
/* Return a vector of char pointers which point to the different
|
||
possible completions in CMD of TEXT.
|
||
|
||
WORD points in the same buffer as TEXT, and completions should be
|
||
returned relative to this position. For example, suppose TEXT is "foo"
|
||
and we want to complete to "foobar". If WORD is "oo", return
|
||
"oobar"; if WORD is "baz/foo", return "baz/foobar". */
|
||
|
||
char **
|
||
complete_on_enum (const char *enumlist[],
|
||
char *text,
|
||
char *word)
|
||
{
|
||
char **matchlist;
|
||
int sizeof_matchlist;
|
||
int matches;
|
||
int textlen = strlen (text);
|
||
int i;
|
||
const char *name;
|
||
|
||
sizeof_matchlist = 10;
|
||
matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *));
|
||
matches = 0;
|
||
|
||
for (i = 0; (name = enumlist[i]) != NULL; i++)
|
||
if (strncmp (name, text, textlen) == 0)
|
||
{
|
||
if (matches == sizeof_matchlist)
|
||
{
|
||
sizeof_matchlist *= 2;
|
||
matchlist = (char **) xrealloc ((char *) matchlist,
|
||
(sizeof_matchlist
|
||
* sizeof (char *)));
|
||
}
|
||
|
||
matchlist[matches] = (char *)
|
||
xmalloc (strlen (word) + strlen (name) + 1);
|
||
if (word == text)
|
||
strcpy (matchlist[matches], name);
|
||
else if (word > text)
|
||
{
|
||
/* Return some portion of name. */
|
||
strcpy (matchlist[matches], name + (word - text));
|
||
}
|
||
else
|
||
{
|
||
/* Return some of text plus name. */
|
||
strncpy (matchlist[matches], word, text - word);
|
||
matchlist[matches][text - word] = '\0';
|
||
strcat (matchlist[matches], name);
|
||
}
|
||
++matches;
|
||
}
|
||
|
||
if (matches == 0)
|
||
{
|
||
xfree (matchlist);
|
||
matchlist = 0;
|
||
}
|
||
else
|
||
{
|
||
matchlist = (char **) xrealloc ((char *) matchlist, ((matches + 1)
|
||
* sizeof (char *)));
|
||
matchlist[matches] = (char *) 0;
|
||
}
|
||
|
||
return matchlist;
|
||
}
|
||
|