1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1998-2016 Zend Technologies Ltd. (http://www.zend.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 2.00 of the Zend license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.zend.com/license/2_00.txt. |
11 | If you did not receive a copy of the Zend license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@zend.com so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Andi Gutmans <andi@zend.com> |
16 | Zeev Suraski <zeev@zend.com> |
17 +----------------------------------------------------------------------+
18 */
19
20 /* $Id$ */
21
22 #include "zend.h"
23 #include "zend_llist.h"
24 #include "zend_qsort.h"
25
zend_llist_init(zend_llist * l,size_t size,llist_dtor_func_t dtor,unsigned char persistent)26 ZEND_API void zend_llist_init(zend_llist *l, size_t size, llist_dtor_func_t dtor, unsigned char persistent)
27 {
28 l->head = NULL;
29 l->tail = NULL;
30 l->count = 0;
31 l->size = size;
32 l->dtor = dtor;
33 l->persistent = persistent;
34 }
35
36
zend_llist_add_element(zend_llist * l,void * element)37 ZEND_API void zend_llist_add_element(zend_llist *l, void *element)
38 {
39 zend_llist_element *tmp = pemalloc(sizeof(zend_llist_element)+l->size-1, l->persistent);
40
41 tmp->prev = l->tail;
42 tmp->next = NULL;
43 if (l->tail) {
44 l->tail->next = tmp;
45 } else {
46 l->head = tmp;
47 }
48 l->tail = tmp;
49 memcpy(tmp->data, element, l->size);
50
51 ++l->count;
52 }
53
54
zend_llist_prepend_element(zend_llist * l,void * element)55 ZEND_API void zend_llist_prepend_element(zend_llist *l, void *element)
56 {
57 zend_llist_element *tmp = pemalloc(sizeof(zend_llist_element)+l->size-1, l->persistent);
58
59 tmp->next = l->head;
60 tmp->prev = NULL;
61 if (l->head) {
62 l->head->prev = tmp;
63 } else {
64 l->tail = tmp;
65 }
66 l->head = tmp;
67 memcpy(tmp->data, element, l->size);
68
69 ++l->count;
70 }
71
72
73 #define DEL_LLIST_ELEMENT(current, l) \
74 if ((current)->prev) {\
75 (current)->prev->next = (current)->next;\
76 } else {\
77 (l)->head = (current)->next;\
78 }\
79 if ((current)->next) {\
80 (current)->next->prev = (current)->prev;\
81 } else {\
82 (l)->tail = (current)->prev;\
83 }\
84 if ((l)->dtor) {\
85 (l)->dtor((current)->data);\
86 }\
87 pefree((current), (l)->persistent);\
88 --l->count;
89
90
zend_llist_del_element(zend_llist * l,void * element,int (* compare)(void * element1,void * element2))91 ZEND_API void zend_llist_del_element(zend_llist *l, void *element, int (*compare)(void *element1, void *element2))
92 {
93 zend_llist_element *current=l->head;
94
95 while (current) {
96 if (compare(current->data, element)) {
97 DEL_LLIST_ELEMENT(current, l);
98 break;
99 }
100 current = current->next;
101 }
102 }
103
104
zend_llist_destroy(zend_llist * l)105 ZEND_API void zend_llist_destroy(zend_llist *l)
106 {
107 zend_llist_element *current=l->head, *next;
108
109 while (current) {
110 next = current->next;
111 if (l->dtor) {
112 l->dtor(current->data);
113 }
114 pefree(current, l->persistent);
115 current = next;
116 }
117
118 l->count = 0;
119 }
120
121
zend_llist_clean(zend_llist * l)122 ZEND_API void zend_llist_clean(zend_llist *l)
123 {
124 zend_llist_destroy(l);
125 l->head = l->tail = NULL;
126 }
127
128
zend_llist_remove_tail(zend_llist * l)129 ZEND_API void *zend_llist_remove_tail(zend_llist *l)
130 {
131 zend_llist_element *old_tail;
132 void *data;
133
134 if ((old_tail = l->tail)) {
135 if (old_tail->prev) {
136 old_tail->prev->next = NULL;
137 } else {
138 l->head = NULL;
139 }
140
141 data = old_tail->data;
142
143 l->tail = old_tail->prev;
144 if (l->dtor) {
145 l->dtor(data);
146 }
147 pefree(old_tail, l->persistent);
148
149 --l->count;
150
151 return data;
152 }
153
154 return NULL;
155 }
156
157
zend_llist_copy(zend_llist * dst,zend_llist * src)158 ZEND_API void zend_llist_copy(zend_llist *dst, zend_llist *src)
159 {
160 zend_llist_element *ptr;
161
162 zend_llist_init(dst, src->size, src->dtor, src->persistent);
163 ptr = src->head;
164 while (ptr) {
165 zend_llist_add_element(dst, ptr->data);
166 ptr = ptr->next;
167 }
168 }
169
170
zend_llist_apply_with_del(zend_llist * l,int (* func)(void * data))171 ZEND_API void zend_llist_apply_with_del(zend_llist *l, int (*func)(void *data))
172 {
173 zend_llist_element *element, *next;
174
175 element=l->head;
176 while (element) {
177 next = element->next;
178 if (func(element->data)) {
179 DEL_LLIST_ELEMENT(element, l);
180 }
181 element = next;
182 }
183 }
184
185
zend_llist_apply(zend_llist * l,llist_apply_func_t func TSRMLS_DC)186 ZEND_API void zend_llist_apply(zend_llist *l, llist_apply_func_t func TSRMLS_DC)
187 {
188 zend_llist_element *element;
189
190 for (element=l->head; element; element=element->next) {
191 func(element->data TSRMLS_CC);
192 }
193 }
194
zend_llist_sort(zend_llist * l,llist_compare_func_t comp_func TSRMLS_DC)195 ZEND_API void zend_llist_sort(zend_llist *l, llist_compare_func_t comp_func TSRMLS_DC)
196 {
197 size_t i;
198
199 zend_llist_element **elements;
200 zend_llist_element *element, **ptr;
201
202 if (l->count <= 0) {
203 return;
204 }
205
206 elements = (zend_llist_element **) emalloc(l->count * sizeof(zend_llist_element *));
207
208 ptr = &elements[0];
209
210 for (element=l->head; element; element=element->next) {
211 *ptr++ = element;
212 }
213
214 zend_qsort(elements, l->count, sizeof(zend_llist_element *), (compare_func_t) comp_func TSRMLS_CC);
215
216 l->head = elements[0];
217 elements[0]->prev = NULL;
218
219 for (i = 1; i < l->count; i++) {
220 elements[i]->prev = elements[i-1];
221 elements[i-1]->next = elements[i];
222 }
223 elements[i-1]->next = NULL;
224 l->tail = elements[i-1];
225 efree(elements);
226 }
227
228
zend_llist_apply_with_argument(zend_llist * l,llist_apply_with_arg_func_t func,void * arg TSRMLS_DC)229 ZEND_API void zend_llist_apply_with_argument(zend_llist *l, llist_apply_with_arg_func_t func, void *arg TSRMLS_DC)
230 {
231 zend_llist_element *element;
232
233 for (element=l->head; element; element=element->next) {
234 func(element->data, arg TSRMLS_CC);
235 }
236 }
237
238
zend_llist_apply_with_arguments(zend_llist * l,llist_apply_with_args_func_t func TSRMLS_DC,int num_args,...)239 ZEND_API void zend_llist_apply_with_arguments(zend_llist *l, llist_apply_with_args_func_t func TSRMLS_DC, int num_args, ...)
240 {
241 zend_llist_element *element;
242 va_list args;
243
244 va_start(args, num_args);
245 for (element=l->head; element; element=element->next) {
246 func(element->data, num_args, args TSRMLS_CC);
247 }
248 va_end(args);
249 }
250
251
zend_llist_count(zend_llist * l)252 ZEND_API int zend_llist_count(zend_llist *l)
253 {
254 return l->count;
255 }
256
257
zend_llist_get_first_ex(zend_llist * l,zend_llist_position * pos)258 ZEND_API void *zend_llist_get_first_ex(zend_llist *l, zend_llist_position *pos)
259 {
260 zend_llist_position *current = pos ? pos : &l->traverse_ptr;
261
262 *current = l->head;
263 if (*current) {
264 return (*current)->data;
265 } else {
266 return NULL;
267 }
268 }
269
270
zend_llist_get_last_ex(zend_llist * l,zend_llist_position * pos)271 ZEND_API void *zend_llist_get_last_ex(zend_llist *l, zend_llist_position *pos)
272 {
273 zend_llist_position *current = pos ? pos : &l->traverse_ptr;
274
275 *current = l->tail;
276 if (*current) {
277 return (*current)->data;
278 } else {
279 return NULL;
280 }
281 }
282
283
zend_llist_get_next_ex(zend_llist * l,zend_llist_position * pos)284 ZEND_API void *zend_llist_get_next_ex(zend_llist *l, zend_llist_position *pos)
285 {
286 zend_llist_position *current = pos ? pos : &l->traverse_ptr;
287
288 if (*current) {
289 *current = (*current)->next;
290 if (*current) {
291 return (*current)->data;
292 }
293 }
294 return NULL;
295 }
296
297
zend_llist_get_prev_ex(zend_llist * l,zend_llist_position * pos)298 ZEND_API void *zend_llist_get_prev_ex(zend_llist *l, zend_llist_position *pos)
299 {
300 zend_llist_position *current = pos ? pos : &l->traverse_ptr;
301
302 if (*current) {
303 *current = (*current)->prev;
304 if (*current) {
305 return (*current)->data;
306 }
307 }
308 return NULL;
309 }
310
311 /*
312 * Local variables:
313 * tab-width: 4
314 * c-basic-offset: 4
315 * indent-tabs-mode: t
316 * End:
317 */
318