Mon, 22 Jul 2013 13:45:49 +0200
changed signature of sstrncat + some documentation for UcxList + new features for UcxList
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 */
29 #include "list.h"
31 UcxList *ucx_list_clone(UcxList *l, copy_func fnc, void *data) {
32 UcxList *ret = NULL;
33 while (l != NULL) {
34 if (fnc != NULL) {
35 ret = ucx_list_append(ret, fnc(l->data, data));
36 } else {
37 ret = ucx_list_append(ret, l->data);
38 }
39 l = l->next;
40 }
41 return ret;
42 }
44 int ucx_list_equals(const UcxList *l1, const UcxList *l2,
45 cmp_func fnc, void* data) {
46 if (l1 == l2) return 1;
48 while (l1 != NULL && l2 != NULL) {
49 if (fnc == NULL) {
50 if (l1->data != l2->data) return 0;
51 } else {
52 if (fnc(l1->data, l2->data, data) != 0) return 0;
53 }
54 l1 = l1->next;
55 l2 = l2->next;
56 }
58 return (l1 == NULL && l2 == NULL);
59 }
61 void ucx_list_free(UcxList *l) {
62 UcxList *e = l, *f;
63 while (e != NULL) {
64 f = e;
65 e = e->next;
66 free(f);
67 }
68 }
70 UcxList *ucx_list_append(UcxList *l, void *data) {
71 UcxList *nl = (UcxList*) malloc(sizeof(UcxList));
72 if (nl == NULL) return NULL;
74 nl->data = data;
75 nl->next = NULL;
76 if (l == NULL) {
77 nl->prev = NULL;
78 return nl;
79 } else {
80 UcxList *t = ucx_list_last(l);
81 t->next = nl;
82 nl->prev = t;
83 return l;
84 }
85 }
87 UcxList *ucx_list_prepend(UcxList *l, void *data) {
88 UcxList *nl = ucx_list_append(NULL, data);
89 if (nl == NULL) return NULL;
91 if (l != NULL) {
92 nl->next = l;
93 l->prev = nl;
94 }
95 return nl;
96 }
98 UcxList *ucx_list_concat(UcxList *l1, UcxList *l2) {
99 if (l1 == NULL) {
100 return l2;
101 } else {
102 UcxList *last = ucx_list_last(l1);
103 last->next = l2;
104 l2->prev = last;
105 return l1;
106 }
107 }
109 UcxList *ucx_list_last(const UcxList *l) {
110 if (l == NULL) return NULL;
112 const UcxList *e = l;
113 while (e->next != NULL) {
114 e = e->next;
115 }
116 return (UcxList*)e;
117 }
119 ssize_t ucx_list_indexof(const UcxList *list, const UcxList *elem) {
120 ssize_t index = 0;
121 while (list) {
122 if (list == elem) {
123 return index;
124 }
125 list = list->next;
126 index++;
127 }
128 return -1;
129 }
131 UcxList *ucx_list_get(const UcxList *l, int index) {
132 if (l == NULL) return NULL;
134 const UcxList *e = l;
135 while (e->next != NULL && index > 0) {
136 e = e->next;
137 index--;
138 }
140 return (UcxList*)(index == 0 ? e : NULL);
141 }
143 ssize_t ucx_list_find(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
144 ssize_t index = 0;
145 UCX_FOREACH(e, l) {
146 if (fnc(elem, e->data, cmpdata) == 0) {
147 return index;
148 }
149 index++;
150 }
151 return -1;
152 }
154 int ucx_list_contains(UcxList *l, void *elem, cmp_func fnc, void *cmpdata) {
155 return ucx_list_find(l, elem, fnc, cmpdata) > -1;
156 }
158 size_t ucx_list_size(const UcxList *l) {
159 if (l == NULL) return 0;
161 const UcxList *e = l;
162 size_t s = 1;
163 while (e->next != NULL) {
164 e = e->next;
165 s++;
166 }
168 return s;
169 }
171 UcxList *ucx_list_sort_merge(int length,
172 UcxList* restrict ls, UcxList* restrict le, UcxList* restrict re,
173 cmp_func fnc, void* data) {
175 UcxList** sorted = (UcxList**) malloc(sizeof(UcxList*)*length);
176 UcxList *rc, *lc;
178 lc = ls; rc = le;
179 int n = 0;
180 while (lc && lc != le && rc != re) {
181 if (fnc(lc->data, rc->data, data) <= 0) {
182 sorted[n] = lc;
183 lc = lc->next;
184 } else {
185 sorted[n] = rc;
186 rc = rc->next;
187 }
188 n++;
189 }
190 while (lc && lc != le) {
191 sorted[n] = lc;
192 lc = lc->next;
193 n++;
194 }
195 while (rc && rc != re) {
196 sorted[n] = rc;
197 rc = rc->next;
198 n++;
199 }
201 // Update pointer
202 sorted[0]->prev = NULL;
203 for (int i = 0 ; i < length-1 ; i++) {
204 sorted[i]->next = sorted[i+1];
205 sorted[i+1]->prev = sorted[i];
206 }
207 sorted[length-1]->next = NULL;
209 UcxList *ret = sorted[0];
210 free(sorted);
211 return ret;
212 }
214 UcxList *ucx_list_sort(UcxList *l, cmp_func fnc, void *data) {
215 if (l == NULL) {
216 return NULL;
217 }
219 UcxList *lc;
220 int ln = 1;
222 UcxList *restrict ls = l, *restrict le, *restrict re;
223 lc = ls;
224 while (lc->next != NULL && fnc(lc->next->data, lc->data, data) > 0) {
225 lc = lc->next;
226 ln++;
227 }
228 le = lc->next;
230 if (le == NULL) {
231 return l; // this list is already sorted :)
232 } else {
233 UcxList *rc;
234 int rn = 1;
235 rc = le;
236 while (rc->next != NULL && fnc(rc->next->data, rc->data, data) > 0) {
237 rc = rc->next;
238 rn++;
239 }
240 re = rc->next;
242 // Something left? Sort it!
243 UcxList *remainder = re;
244 size_t remainder_length = ucx_list_size(remainder);
245 if (remainder != NULL) {
246 remainder = ucx_list_sort(remainder, fnc, data);
247 }
249 // {ls,...,le->prev} and {rs,...,re->prev} are sorted - merge them
250 UcxList *sorted = ucx_list_sort_merge(ln+rn,
251 ls, le, re,
252 fnc, data);
254 // merge sorted list with (also sorted) remainder
255 l = ucx_list_sort_merge(ln+rn+remainder_length,
256 sorted, remainder, NULL, fnc, data);
258 return l;
259 }
260 }
262 UcxList *ucx_list_first(const UcxList *l) {
263 if (l == NULL) return NULL;
265 const UcxList *e = l;
266 while (e->prev != NULL) {
267 e = e->prev;
268 }
269 return (UcxList *)e;
270 }
272 UcxList *ucx_list_remove(UcxList *l, UcxList *e) {
273 if (e->prev == NULL) {
274 if(e->next != NULL) {
275 e->next->prev = NULL;
276 l = e->next;
277 } else {
278 l = NULL;
279 }
281 } else {
282 e->prev->next = e->next;
283 e->next->prev = e->prev;
284 }
285 free(e);
286 return l;
287 }