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/* Routines for name->symbol lookups in GDB.
Copyright (C) 2003-2017 Free Software Foundation, Inc.
Contributed by David Carlton <carlton@bactrian.org> and by Kealia,
Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef DICTIONARY_H
#define DICTIONARY_H
#include "symfile.h"
/* An opaque type for dictionaries; only dictionary.c should know
about its innards. */
struct dictionary;
/* Other types needed for declarations. */
struct symbol;
struct obstack;
struct pending;
struct language_defn;
/* The creation functions for various implementations of
dictionaries. */
/* Create a dictionary of symbols of language LANGUAGE implemented via
a fixed-size hashtable. All memory it uses is allocated on
OBSTACK; the environment is initialized from SYMBOL_LIST. */
extern struct dictionary *dict_create_hashed (struct obstack *obstack,
enum language language,
const struct pending
*symbol_list);
/* Create a dictionary of symbols of language LANGUAGE, implemented
via a hashtable that grows as necessary. The dictionary is
initially empty; to add symbols to it, call dict_add_symbol().
Call dict_free() when you're done with it. */
extern struct dictionary *
dict_create_hashed_expandable (enum language language);
/* Create a dictionary of symbols of language LANGUAGE, implemented
via a fixed-size array. All memory it uses is allocated on
OBSTACK; the environment is initialized from the SYMBOL_LIST. The
symbols are ordered in the same order that they're found in
SYMBOL_LIST. */
extern struct dictionary *dict_create_linear (struct obstack *obstack,
enum language language,
const struct pending
*symbol_list);
/* Create a dictionary of symbols of language LANGUAGE, implemented
via an array that grows as necessary. The dictionary is initially
empty; to add symbols to it, call dict_add_symbol(). Call
dict_free() when you're done with it. */
extern struct dictionary *
dict_create_linear_expandable (enum language language);
/* The functions providing the interface to dictionaries. Note that
the most common parts of the interface, namely symbol lookup, are
only provided via iterator functions. */
/* Free the memory used by a dictionary that's not on an obstack. (If
any.) */
extern void dict_free (struct dictionary *dict);
/* Add a symbol to an expandable dictionary. */
extern void dict_add_symbol (struct dictionary *dict, struct symbol *sym);
/* Utility to add a list of symbols to a dictionary. */
extern void dict_add_pending (struct dictionary *dict,
const struct pending *symbol_list);
/* Is the dictionary empty? */
extern int dict_empty (struct dictionary *dict);
/* A type containing data that is used when iterating over all symbols
in a dictionary. Don't ever look at its innards; this type would
be opaque if we didn't need to be able to allocate it on the
stack. */
struct dict_iterator
{
/* The dictionary that this iterator is associated to. */
const struct dictionary *dict;
/* The next two members are data that is used in a way that depends
on DICT's implementation type. */
int index;
struct symbol *current;
};
/* Initialize ITERATOR to point at the first symbol in DICT, and
return that first symbol, or NULL if DICT is empty. */
extern struct symbol *dict_iterator_first (const struct dictionary *dict,
struct dict_iterator *iterator);
/* Advance ITERATOR, and return the next symbol, or NULL if there are
no more symbols. Don't call this if you've previously received
NULL from dict_iterator_first or dict_iterator_next on this
iteration. */
extern struct symbol *dict_iterator_next (struct dict_iterator *iterator);
/* Initialize ITERATOR to point at the first symbol in DICT whose
SYMBOL_SEARCH_NAME is NAME, as tested using COMPARE (which must use
the same conventions as strcmp_iw and be compatible with any
dictionary hashing function), and return that first symbol, or NULL
if there are no such symbols. */
extern struct symbol *dict_iter_match_first (const struct dictionary *dict,
const lookup_name_info &name,
struct dict_iterator *iterator);
/* Advance ITERATOR to point at the next symbol in DICT whose
SYMBOL_SEARCH_NAME is NAME, as tested using COMPARE (see
dict_iter_match_first), or NULL if there are no more such symbols.
Don't call this if you've previously received NULL from
dict_iterator_match_first or dict_iterator_match_next on this
iteration. And don't call it unless ITERATOR was created by a
previous call to dict_iter_match_first with the same NAME and COMPARE. */
extern struct symbol *dict_iter_match_next (const lookup_name_info &name,
struct dict_iterator *iterator);
/* Return some notion of the size of the dictionary: the number of
symbols if we have that, the number of hash buckets otherwise. */
extern int dict_size (const struct dictionary *dict);
/* Macro to loop through all symbols in a dictionary DICT, in no
particular order. ITER is a struct dict_iterator (NOTE: __not__ a
struct dict_iterator *), and SYM points to the current symbol.
It's implemented as a single loop, so you can terminate the loop
early by a break if you desire. */
#define ALL_DICT_SYMBOLS(dict, iter, sym) \
for ((sym) = dict_iterator_first ((dict), &(iter)); \
(sym); \
(sym) = dict_iterator_next (&(iter)))
#endif /* DICTIONARY_H */
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