2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * @file type_identify.c
22 * @brief Representation of types.
23 * @author Goetz Lindenmaier
42 /* The hash set for types. */
43 static pset *type_table = NULL;
45 /* hash and compare types */
46 static hash_types_func_t *hash_types_func;
47 static compare_types_func_t *compare_types_func;
49 int compare_names (const void *tp1, const void *tp2) {
50 ir_type *t1 = (ir_type *) tp1;
51 ir_type *t2 = (ir_type *) tp2;
54 (t1->type_op != t2->type_op ||
55 t1->name != t2->name ) );
58 /* stuff for comparing two types. */
59 int compare_strict(const void *tp1, const void *tp2) {
60 const ir_type *t1 = tp1;
61 const ir_type *t2 = tp2;
65 /* stuff to compute a hash value for a type. */
66 int firm_hash_name(ir_type *tp) {
67 unsigned h = (unsigned)PTR_TO_INT(tp->type_op);
68 h = 9*h + (unsigned)PTR_TO_INT(tp->name);
72 /* The function that hashes a type. */
73 ir_type *mature_type(ir_type *tp) {
78 o = pset_insert (type_table, tp, hash_types_func(tp) );
79 if (!o || o == tp) return tp;
80 exchange_types(tp, o);
86 /* The function that hashes a type. */
87 ir_type *mature_type_free(ir_type *tp) {
92 o = pset_insert (type_table, tp, hash_types_func(tp) );
93 if (!o || o == tp) return tp;
95 free_type_entities(tp);
101 /* The function that hashes a type. */
102 ir_type *mature_type_free_entities(ir_type *tp) {
107 o = pset_insert (type_table, tp, hash_types_func(tp) );
108 if (!o || o == tp) return tp;
110 free_type_entities(tp);
111 exchange_types(tp, o);
116 /* initialize this module */
117 void init_type_identify(type_identify_if_t *ti_if) {
118 compare_types_func = ti_if && ti_if->cmp ? ti_if->cmp : compare_strict;
119 hash_types_func = ti_if && ti_if->hash ? ti_if->hash : firm_hash_name;
121 type_table = new_pset (compare_types_func, 8);