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
22 * @author Michael Beck
23 * @brief A linked nodeset.
25 #ifndef _FIRM_IRLINKEDNODESET_H_
26 #define _FIRM_IRLINKEDNODESET_H_
28 #include "firm_types.h"
32 typedef struct ir_lnk_nodeset_entry_t {
33 ir_node *node; /**< the node itself */
34 list_head list; /**< link field for the list iterator */
35 } ir_lnk_nodeset_entry_t;
37 #define HashSet ir_lnk_nodeset_t
38 #define ValueType ir_lnk_nodeset_entry_t
39 #define ADDITIONAL_DATA list_head elem_list; list_head all_iters;
45 #undef ADDITIONAL_DATA
49 typedef struct ir_lnk_nodeset_t ir_lnk_nodeset_t;
50 typedef struct ir_lnk_nodeset_iterator_t {
51 list_head *iter; /**< points to the list head of the last element */
52 const ir_lnk_nodeset_t *nodeset; /**< lithe nodeset of this iterator. */
53 } ir_lnk_nodeset_iterator_t;
56 * Initializes a linked nodeset with default size.
58 * @param nodeset Pointer to allocated space for the nodeset
60 void ir_lnk_nodeset_init(ir_lnk_nodeset_t *nodeset);
63 * Initializes a linked nodeset.
65 * @param nodeset Pointer to allocated space for the nodeset
66 * @param expected_elements Number of elements expected in the nodeset (roughly)
68 void ir_lnk_nodeset_init_size(ir_lnk_nodeset_t *nodeset, size_t expected_elements);
71 * Destroys a nodeset and frees the memory allocated for hashtable. The memory of
72 * the nodeset itself is not freed.
74 * @param nodeset Pointer to the nodeset
76 void ir_lnk_nodeset_destroy(ir_lnk_nodeset_t *nodeset);
79 * Allocates memory for a linked nodeset and initializes the set.
81 * @param expected_elements Number of elements expected in the nodeset (roughly)
82 * @return The initialized nodeset
84 static inline ir_lnk_nodeset_t *ir_lnk_nodeset_new(size_t expected_elements) {
85 ir_lnk_nodeset_t *res = XMALLOC(ir_lnk_nodeset_t);
86 ir_lnk_nodeset_init_size(res, expected_elements);
91 * Destroys a linked nodeset and frees the memory of the nodeset itself.
93 static inline void ir_lnk_nodeset_del(ir_lnk_nodeset_t *nodeset) {
94 ir_lnk_nodeset_destroy(nodeset);
99 * Inserts a node into a linked nodeset.
101 * @param nodeset Pointer to the nodeset
102 * @param node node to insert into the nodeset
103 * @returns 1 if the element has been inserted,
104 * 0 if it was already there
106 int ir_lnk_nodeset_insert(ir_lnk_nodeset_t *nodeset, ir_node *node);
110 * Removes a node from a linked nodeset. Does nothing if the nodeset doesn't contain
113 * @param nodeset Pointer to the nodeset
114 * @param node Node to remove from the nodeset
116 void ir_lnk_nodeset_remove(ir_lnk_nodeset_t *nodeset, const ir_node *node);
119 * Tests whether a linked nodeset contains a specific node.
121 * @param nodeset Pointer to the nodeset
122 * @param node The pointer to find
123 * @returns 1 if nodeset contains the node, 0 else
125 int ir_lnk_nodeset_contains(const ir_lnk_nodeset_t *nodeset, const ir_node *node);
128 * Returns the number of nodes contained in the linked nodeset.
130 * @param nodeset Pointer to the nodeset
131 * @returns Number of nodes contained in the linked nodeset
133 size_t ir_lnk_nodeset_size(const ir_lnk_nodeset_t *nodeset);
136 * Initializes a nodeset iterator. Sets the iterator before the first element in
137 * the linked nodeset.
139 * @param iterator Pointer to already allocated iterator memory
140 * @param nodeset Pointer to the nodeset
142 void ir_lnk_nodeset_iterator_init(ir_lnk_nodeset_iterator_t *iterator,
143 const ir_lnk_nodeset_t *nodeset);
146 * Advances the iterator and returns the current element or NULL if all elements
147 * in the linked nodeset have been processed.
148 * @attention It is not allowed to use ir_lnk_nodeset_insert or ir_lnk_nodeset_remove while
149 * iterating over a nodeset.
151 * @param iterator Pointer to the nodeset iterator.
152 * @returns Next element in the nodeset or NULL
154 ir_node *ir_lnk_nodeset_iterator_next(ir_lnk_nodeset_iterator_t *iterator);
157 * Removes the element the iterator currently points to.
159 * @param nodeset Pointer to the linked nodeset
160 * @param iterator Pointer to the linked nodeset iterator.
162 void ir_lnk_nodeset_remove_iterator(ir_lnk_nodeset_t *nodeset,
163 ir_lnk_nodeset_iterator_t *iterator);
165 #define foreach_ir_lnk_nodeset(nodeset, irn, iter) \
166 for (ir_lnk_nodeset_iterator_init(&iter, nodeset), \
167 irn = ir_lnk_nodeset_iterator_next(&iter); \
168 irn != NULL; irn = ir_lnk_nodeset_iterator_next(&iter))