Rev 1787 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2004 Jakub Jermar |
| 1 | jermar | 3 | * All rights reserved. |
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 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 |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 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 |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 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 |
||
| 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 |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 1757 | jermar | 29 | /** @addtogroup genericadt |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
||
| 32 | |||
| 1248 | jermar | 33 | /** |
| 1704 | cejka | 34 | * @file |
| 1248 | jermar | 35 | * @brief Functions completing doubly linked circular list implementaion. |
| 36 | * |
||
| 37 | * This file contains some of the functions implementing doubly linked circular lists. |
||
| 38 | * However, this ADT is mostly implemented in @ref list.h. |
||
| 39 | */ |
||
| 40 | |||
| 788 | jermar | 41 | #include <adt/list.h> |
| 1 | jermar | 42 | |
| 62 | decky | 43 | /** Check for membership |
| 44 | * |
||
| 45 | * Check whether link is contained in the list head. |
||
| 46 | * The membership is defined as pointer equivalence. |
||
| 47 | * |
||
| 48 | * @param link Item to look for. |
||
| 49 | * @param head List to look in. |
||
| 50 | * |
||
| 67 | decky | 51 | * @return true if link is contained in head, false otherwise. |
| 62 | decky | 52 | * |
| 53 | */ |
||
| 67 | decky | 54 | bool list_member(const link_t *link, const link_t *head) |
| 1 | jermar | 55 | { |
| 67 | decky | 56 | bool found = false; |
| 1 | jermar | 57 | link_t *hlp = head->next; |
| 58 | |||
| 59 | while (hlp != head) { |
||
| 60 | if (hlp == link) { |
||
| 67 | decky | 61 | found = true; |
| 1 | jermar | 62 | break; |
| 63 | } |
||
| 64 | hlp = hlp->next; |
||
| 65 | } |
||
| 66 | |||
| 67 | return found; |
||
| 68 | } |
||
| 69 | |||
| 62 | decky | 70 | |
| 71 | /** Concatenate two lists |
||
| 72 | * |
||
| 73 | * Concatenate lists head1 and head2, producing a single |
||
| 74 | * list head1 containing items from both (in head1, head2 |
||
| 75 | * order) and empty list head2. |
||
| 76 | * |
||
| 77 | * @param head1 First list and concatenated output |
||
| 78 | * @param head2 Second list and empty output. |
||
| 79 | * |
||
| 80 | */ |
||
| 1 | jermar | 81 | void list_concat(link_t *head1, link_t *head2) |
| 82 | { |
||
| 83 | if (list_empty(head2)) |
||
| 84 | return; |
||
| 85 | |||
| 86 | head2->next->prev = head1->prev; |
||
| 87 | head2->prev->next = head1; |
||
| 88 | head1->prev->next = head2->next; |
||
| 89 | head1->prev = head2->prev; |
||
| 90 | list_initialize(head2); |
||
| 91 | } |
||
| 1702 | cejka | 92 | |
| 1757 | jermar | 93 | /** @} |
| 1702 | cejka | 94 | */ |