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comparison: ucx/list.c

ucx/list.c

changeset 0
1f419bd32da1
child 29
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-1:000000000000 0:1f419bd32da1
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2013 Olaf Wintermann. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "list.h"
30
31 UcxList *ucx_list_clone(UcxList *l, copy_func fnc, void *data) {
32 return ucx_list_clone_a(ucx_default_allocator(), l, fnc, data);
33 }
34
35 UcxList *ucx_list_clone_a(UcxAllocator *alloc, UcxList *l,
36 copy_func fnc, void *data) {
37 UcxList *ret = NULL;
38 while (l) {
39 if (fnc) {
40 ret = ucx_list_append_a(alloc, ret, fnc(l->data, data));
41 } else {
42 ret = ucx_list_append_a(alloc, ret, l->data);
43 }
44 l = l->next;
45 }
46 return ret;
47 }
48
49 int ucx_list_equals(const UcxList *l1, const UcxList *l2,
50 cmp_func fnc, void* data) {
51 if (l1 == l2) return 1;
52
53 while (l1 != NULL && l2 != NULL) {
54 if (fnc == NULL) {
55 if (l1->data != l2->data) return 0;
56 } else {
57 if (fnc(l1->data, l2->data, data) != 0) return 0;
58 }
59 l1 = l1->next;
60 l2 = l2->next;
61 }
62
63 return (l1 == NULL && l2 == NULL);
64 }
65
66 void ucx_list_free(UcxList *l) {
67 ucx_list_free_a(ucx_default_allocator(), l);
68 }
69
70 void ucx_list_free_a(UcxAllocator *alloc, UcxList *l) {
71 UcxList *e = l, *f;
72 while (e != NULL) {
73 f = e;
74 e = e->next;
75 alloc->free(alloc->pool, f);
76 }
77 }
78
79 UcxList *ucx_list_append(UcxList *l, void *data) {
80 return ucx_list_append_a(ucx_default_allocator(), l, data);
81 }
82
83 UcxList *ucx_list_append_a(UcxAllocator *alloc, UcxList *l, void *data) {
84 UcxList *nl = (UcxList*) alloc->malloc(alloc->pool, sizeof(UcxList));
85 if (!nl) {
86 return NULL;
87 }
88
89 nl->data = data;
90 nl->next = NULL;
91 if (l) {
92 UcxList *t = ucx_list_last(l);
93 t->next = nl;
94 nl->prev = t;
95 return l;
96 } else {
97 nl->prev = NULL;
98 return nl;
99 }
100 }
101
102 UcxList *ucx_list_prepend(UcxList *l, void *data) {
103 return ucx_list_prepend_a(ucx_default_allocator(), l, data);
104 }
105
106 UcxList *ucx_list_prepend_a(UcxAllocator *alloc, UcxList *l, void *data) {
107 UcxList *nl = ucx_list_append_a(alloc, NULL, data);
108 if (!nl) {
109 return NULL;
110 }
111 l = ucx_list_first(l);
112
113 if (l) {
114 nl->next = l;
115 l->prev = nl;
116 }
117 return nl;
118 }
119
120 UcxList *ucx_list_concat(UcxList *l1, UcxList *l2) {
121 if (l1) {
122 UcxList *last = ucx_list_last(l1);
123 last->next = l2;
124 l2->prev = last;
125 return l1;
126 } else {
127 return l2;
128 }
129 }
130
131 UcxList *ucx_list_last(const UcxList *l) {
132 if (l == NULL) return NULL;
133
134 const UcxList *e = l;
135 while (e->next != NULL) {
136 e = e->next;
137 }
138 return (UcxList*)e;
139 }
140
141 ssize_t ucx_list_indexof(const UcxList *list, const UcxList *elem) {
142 ssize_t index = 0;
143 while (list) {
144 if (list == elem) {
145 return index;
146 }
147 list = list->next;
148 index++;
149 }
150 return -1;
151 }
152
153 UcxList *ucx_list_get(const UcxList *l, int index) {
154 if (l == NULL) return NULL;
155
156 const UcxList *e = l;
157 while (e->next && index > 0) {
158 e = e->next;
159 index--;
160 }
161
162 return (UcxList*)(index == 0 ? e : NULL);
163 }
164
165 ssize_t ucx_list_find(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
166 ssize_t index = 0;
167 UCX_FOREACH(e, l) {
168 if (fnc) {
169 if (fnc(elem, e->data, cmpdata) == 0) {
170 return index;
171 }
172 } else {
173 if (elem == e->data) {
174 return index;
175 }
176 }
177 index++;
178 }
179 return -1;
180 }
181
182 int ucx_list_contains(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
183 return ucx_list_find(l, elem, fnc, cmpdata) > -1;
184 }
185
186 size_t ucx_list_size(const UcxList *l) {
187 if (l == NULL) return 0;
188
189 const UcxList *e = l;
190 size_t s = 1;
191 while (e->next != NULL) {
192 e = e->next;
193 s++;
194 }
195
196 return s;
197 }
198
199 UcxList *ucx_list_sort_merge(int length,
200 UcxList* restrict ls, UcxList* restrict le, UcxList* restrict re,
201 cmp_func fnc, void* data) {
202
203 UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
204 UcxList *rc, *lc;
205
206 lc = ls; rc = le;
207 int n = 0;
208 while (lc && lc != le && rc != re) {
209 if (fnc(lc->data, rc->data, data) <= 0) {
210 sorted[n] = lc;
211 lc = lc->next;
212 } else {
213 sorted[n] = rc;
214 rc = rc->next;
215 }
216 n++;
217 }
218 while (lc && lc != le) {
219 sorted[n] = lc;
220 lc = lc->next;
221 n++;
222 }
223 while (rc && rc != re) {
224 sorted[n] = rc;
225 rc = rc->next;
226 n++;
227 }
228
229 // Update pointer
230 sorted[0]->prev = NULL;
231 for (int i = 0 ; i < length-1 ; i++) {
232 sorted[i]->next = sorted[i+1];
233 sorted[i+1]->prev = sorted[i];
234 }
235 sorted[length-1]->next = NULL;
236
237 UcxList *ret = sorted[0];
238 free(sorted);
239 return ret;
240 }
241
242 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
243 if (l == NULL) {
244 return NULL;
245 }
246
247 UcxList *lc;
248 int ln = 1;
249
250 UcxList *restrict ls = l, *restrict le, *restrict re;
251 lc = ls;
252 while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
253 lc = lc->next;
254 ln++;
255 }
256 le = lc->next;
257
258 if (le == NULL) {
259 return l; // this list is already sorted :)
260 } else {
261 UcxList *rc;
262 int rn = 1;
263 rc = le;
264 while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
265 rc = rc->next;
266 rn++;
267 }
268 re = rc->next;
269
270 // Something left? Sort it!
271 UcxList *remainder = re;
272 size_t remainder_length = ucx_list_size(remainder);
273 if (remainder != NULL) {
274 remainder = ucx_list_sort(remainder, fnc, data);
275 }
276
277 // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
278 UcxList *sorted = ucx_list_sort_merge(ln+rn,
279 ls, le, re,
280 fnc, data);
281
282 // merge sorted list with (also sorted) remainder
283 l = ucx_list_sort_merge(ln+rn+remainder_length,
284 sorted, remainder, NULL, fnc, data);
285
286 return l;
287 }
288 }
289
290 UcxList *ucx_list_first(const UcxList *l) {
291 if (!l) {
292 return NULL;
293 }
294
295 const UcxList *e = l;
296 while (e->prev) {
297 e = e->prev;
298 }
299 return (UcxList *)e;
300 }
301
302 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
303 return ucx_list_remove_a(ucx_default_allocator(), l, e);
304 }
305
306 UcxList *ucx_list_remove_a(UcxAllocator *alloc, UcxList *l, UcxList *e) {
307 if (e->prev == NULL) {
308 if(e->next != NULL) {
309 e->next->prev = NULL;
310 l = e->next;
311 } else {
312 l = NULL;
313 }
314
315 } else {
316 e->prev->next = e->next;
317 e->next->prev = e->prev;
318 }
319 alloc->free(alloc->pool, e);
320 return l;
321 }

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