/* Line completion stuff for GDB, the GNU debugger.
- Copyright (C) 2000, 2001, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GDB.
/* This can be used for functions which don't want to complete on symbols
but don't want to complete on anything else either. */
char **
-noop_completer (char *text, char *prefix)
+noop_completer (struct cmd_list_element *ignore, char *text, char *prefix)
{
return NULL;
}
/* Complete on filenames. */
char **
-filename_completer (char *text, char *word)
+filename_completer (struct cmd_list_element *ignore, char *text, char *word)
{
int subsequent_name;
char **return_val;
This is intended to be used in commands that set breakpoints etc. */
char **
-location_completer (char *text, char *word)
+location_completer (struct cmd_list_element *ignore, char *text, char *word)
{
int n_syms = 0, n_files = 0;
char ** fn_list = NULL;
return list;
}
-/* Complete on command names. Used by "help". */
-char **
-command_completer (char *text, char *word)
+/* Helper for expression_completer which recursively counts the number
+ of named fields and methods in a structure or union type. */
+static int
+count_struct_fields (struct type *type)
{
- return complete_on_cmdlist (cmdlist, text, word);
+ int i, result = 0;
+
+ CHECK_TYPEDEF (type);
+ for (i = 0; i < TYPE_NFIELDS (type); ++i)
+ {
+ if (i < TYPE_N_BASECLASSES (type))
+ result += count_struct_fields (TYPE_BASECLASS (type, i));
+ else if (TYPE_FIELD_NAME (type, i))
+ ++result;
+ }
+
+ for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
+ {
+ if (TYPE_FN_FIELDLIST_NAME (type, i))
+ ++result;
+ }
+
+ return result;
}
+/* Helper for expression_completer which recursively adds field and
+ method names from TYPE, a struct or union type, to the array
+ OUTPUT. This function assumes that OUTPUT is correctly-sized. */
+static void
+add_struct_fields (struct type *type, int *nextp, char **output,
+ char *fieldname, int namelen)
+{
+ int i;
+ int computed_type_name = 0;
+ char *type_name = NULL;
+
+ CHECK_TYPEDEF (type);
+ for (i = 0; i < TYPE_NFIELDS (type); ++i)
+ {
+ if (i < TYPE_N_BASECLASSES (type))
+ add_struct_fields (TYPE_BASECLASS (type, i), nextp, output,
+ fieldname, namelen);
+ else if (TYPE_FIELD_NAME (type, i)
+ && ! strncmp (TYPE_FIELD_NAME (type, i), fieldname, namelen))
+ {
+ output[*nextp] = xstrdup (TYPE_FIELD_NAME (type, i));
+ ++*nextp;
+ }
+ }
+
+ for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
+ {
+ char *name = TYPE_FN_FIELDLIST_NAME (type, i);
+ if (name && ! strncmp (name, fieldname, namelen))
+ {
+ if (!computed_type_name)
+ {
+ type_name = type_name_no_tag (type);
+ computed_type_name = 1;
+ }
+ /* Omit constructors from the completion list. */
+ if (type_name && strcmp (type_name, name))
+ {
+ output[*nextp] = xstrdup (name);
+ ++*nextp;
+ }
+ }
+ }
+}
+
+/* Complete on expressions. Often this means completing on symbol
+ names, but some language parsers also have support for completing
+ field names. */
+char **
+expression_completer (struct cmd_list_element *ignore, char *text, char *word)
+{
+ struct type *type;
+ char *fieldname, *p;
+
+ /* Perform a tentative parse of the expression, to see whether a
+ field completion is required. */
+ fieldname = NULL;
+ type = parse_field_expression (text, &fieldname);
+ if (fieldname && type)
+ {
+ for (;;)
+ {
+ CHECK_TYPEDEF (type);
+ if (TYPE_CODE (type) != TYPE_CODE_PTR
+ && TYPE_CODE (type) != TYPE_CODE_REF)
+ break;
+ type = TYPE_TARGET_TYPE (type);
+ }
+
+ if (TYPE_CODE (type) == TYPE_CODE_UNION
+ || TYPE_CODE (type) == TYPE_CODE_STRUCT)
+ {
+ int alloc = count_struct_fields (type);
+ int flen = strlen (fieldname);
+ int out = 0;
+ char **result = (char **) xmalloc ((alloc + 1) * sizeof (char *));
+
+ add_struct_fields (type, &out, result, fieldname, flen);
+ result[out] = NULL;
+ xfree (fieldname);
+ return result;
+ }
+ }
+ xfree (fieldname);
+
+ /* Commands which complete on locations want to see the entire
+ argument. */
+ for (p = word;
+ p > text && p[-1] != ' ' && p[-1] != '\t';
+ p--)
+ ;
+
+ /* Not ideal but it is what we used to do before... */
+ return location_completer (ignore, p, word);
+}
/* Here are some useful test cases for completion. FIXME: These should
be put in the test suite. They should be tested with both M-? and TAB.
LINE_BUFFER is available to be looked at; it contains the entire text
of the line. POINT is the offset in that line of the cursor. You
- should pretend that the line ends at POINT. */
-
-char **
-complete_line (const char *text, char *line_buffer, int point)
+ should pretend that the line ends at POINT.
+
+ FOR_HELP is true when completing a 'help' command. In this case,
+ once sub-command completions are exhausted, we simply return NULL.
+ When FOR_HELP is false, we will call a sub-command's completion
+ function. */
+
+static char **
+complete_line_internal (const char *text, char *line_buffer, int point,
+ int for_help)
{
char **list = NULL;
char *tmp_command, *p;
rl_completer_word_break_characters =
gdb_completer_command_word_break_characters;
}
+ else if (for_help)
+ list = NULL;
else if (c->enums)
{
list = complete_on_enum (c->enums, p, word);
p--)
;
}
- list = (*c->completer) (p, word);
+ list = (*c->completer) (c, p, word);
}
}
else
gdb_completer_command_word_break_characters;
}
}
+ else if (for_help)
+ list = NULL;
else
{
/* There is non-whitespace beyond the command. */
p--)
;
}
- list = (*c->completer) (p, word);
+ list = (*c->completer) (c, p, word);
}
}
}
return list;
}
+/* Like complete_line_internal, but always passes 0 for FOR_HELP. */
+
+char **
+complete_line (const char *text, char *line_buffer, int point)
+{
+ return complete_line_internal (text, line_buffer, point, 0);
+}
+
+/* Complete on command names. Used by "help". */
+char **
+command_completer (struct cmd_list_element *ignore, char *text, char *word)
+{
+ return complete_line_internal (word, text, strlen (text), 1);
+}
+
/* Generate completions one by one for the completer. Each time we are
called return another potential completion to the caller.
line_completion just completes on commands or passes the buck to the
if (list)
{
/* Free the storage used by LIST, but not by the strings inside.
- This is because rl_complete_internal () frees the strings. */
+ This is because rl_complete_internal () frees the strings.
+ As complete_line may abort by calling `error' clear LIST now. */
xfree (list);
+ list = NULL;
}
index = 0;
list = complete_line (text, line_buffer, point);