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1 | /* |
1 | /* |
2 | * Copyright (c) 2004 Jakub Jermar |
2 | * Copyright (c) 2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup libc |
29 | /** @addtogroup libc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <libadt/list.h> |
35 | #include <adt/list.h> |
36 | 36 | ||
37 | 37 | ||
38 | /** Check for membership |
38 | /** Check for membership |
39 | * |
39 | * |
40 | * Check whether link is contained in the list head. |
40 | * Check whether link is contained in the list head. |
41 | * The membership is defined as pointer equivalence. |
41 | * The membership is defined as pointer equivalence. |
42 | * |
42 | * |
43 | * @param link Item to look for. |
43 | * @param link Item to look for. |
44 | * @param head List to look in. |
44 | * @param head List to look in. |
45 | * |
45 | * |
46 | * @return true if link is contained in head, false otherwise. |
46 | * @return true if link is contained in head, false otherwise. |
47 | * |
47 | * |
48 | */ |
48 | */ |
49 | int list_member(const link_t *link, const link_t *head) |
49 | int list_member(const link_t *link, const link_t *head) |
50 | { |
50 | { |
51 | int found = 0; |
51 | int found = 0; |
52 | link_t *hlp = head->next; |
52 | link_t *hlp = head->next; |
53 | 53 | ||
54 | while (hlp != head) { |
54 | while (hlp != head) { |
55 | if (hlp == link) { |
55 | if (hlp == link) { |
56 | found = 1; |
56 | found = 1; |
57 | break; |
57 | break; |
58 | } |
58 | } |
59 | hlp = hlp->next; |
59 | hlp = hlp->next; |
60 | } |
60 | } |
61 | 61 | ||
62 | return found; |
62 | return found; |
63 | } |
63 | } |
64 | 64 | ||
65 | 65 | ||
66 | /** Concatenate two lists |
66 | /** Concatenate two lists |
67 | * |
67 | * |
68 | * Concatenate lists head1 and head2, producing a single |
68 | * Concatenate lists head1 and head2, producing a single |
69 | * list head1 containing items from both (in head1, head2 |
69 | * list head1 containing items from both (in head1, head2 |
70 | * order) and empty list head2. |
70 | * order) and empty list head2. |
71 | * |
71 | * |
72 | * @param head1 First list and concatenated output |
72 | * @param head1 First list and concatenated output |
73 | * @param head2 Second list and empty output. |
73 | * @param head2 Second list and empty output. |
74 | * |
74 | * |
75 | */ |
75 | */ |
76 | void list_concat(link_t *head1, link_t *head2) |
76 | void list_concat(link_t *head1, link_t *head2) |
77 | { |
77 | { |
78 | if (list_empty(head2)) |
78 | if (list_empty(head2)) |
79 | return; |
79 | return; |
80 | 80 | ||
81 | head2->next->prev = head1->prev; |
81 | head2->next->prev = head1->prev; |
82 | head2->prev->next = head1; |
82 | head2->prev->next = head1; |
83 | head1->prev->next = head2->next; |
83 | head1->prev->next = head2->next; |
84 | head1->prev = head2->prev; |
84 | head1->prev = head2->prev; |
85 | list_initialize(head2); |
85 | list_initialize(head2); |
86 | } |
86 | } |
87 | 87 | ||
88 | 88 | ||
89 | /** Count list items |
89 | /** Count list items |
90 | * |
90 | * |
91 | * Return the number of items in the list. |
91 | * Return the number of items in the list. |
92 | * |
92 | * |
93 | * @param link List to count. |
93 | * @param link List to count. |
94 | * |
94 | * |
95 | * @return Number of items in the list. |
95 | * @return Number of items in the list. |
96 | * |
96 | * |
97 | */ |
97 | */ |
98 | unsigned int list_count(const link_t *link) |
98 | unsigned int list_count(const link_t *link) |
99 | { |
99 | { |
100 | unsigned int count = 0; |
100 | unsigned int count = 0; |
101 | link_t *hlp = link->next; |
101 | link_t *hlp = link->next; |
102 | 102 | ||
103 | while (hlp != link) { |
103 | while (hlp != link) { |
104 | count++; |
104 | count++; |
105 | hlp = hlp->next; |
105 | hlp = hlp->next; |
106 | } |
106 | } |
107 | 107 | ||
108 | return count; |
108 | return count; |
109 | } |
109 | } |
110 | 110 | ||
111 | /** @} |
111 | /** @} |
112 | */ |
112 | */ |
113 | 113 |