Anurag Singh | 6ec1206 | 2012-10-02 09:59:01 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are |
| 6 | * met: |
| 7 | * * * Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * * Redistributions in binary form must reproduce the above |
| 10 | * copyright notice, this list of conditions and the following |
| 11 | * disclaimer in the documentation and/or other materials provided |
| 12 | * with the distribution. |
Duy Truong | 7022245 | 2013-02-10 06:35:11 -0800 | [diff] [blame] | 13 | * * Neither the name of The Linux Foundation nor the names of its |
Anurag Singh | 6ec1206 | 2012-10-02 09:59:01 -0700 | [diff] [blame] | 14 | * contributors may be used to endorse or promote products derived |
| 15 | * from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 21 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 22 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 24 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 26 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 27 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include <stdio.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <string.h> |
| 33 | |
| 34 | #include "list.h" |
Rashed Abdel-Tawab | 9c14c9f | 2017-12-26 23:11:03 +0200 | [diff] [blame^] | 35 | #include <log/log.h> |
Anurag Singh | 6ec1206 | 2012-10-02 09:59:01 -0700 | [diff] [blame] | 36 | |
| 37 | int init_list_head(struct list_node *head) |
| 38 | { |
| 39 | if (head == NULL) |
| 40 | return -1; |
| 41 | |
| 42 | memset(head, 0, sizeof(*head)); |
| 43 | |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | struct list_node *add_list_node(struct list_node *head, void *data) |
| 48 | { |
| 49 | /* Create a new list_node. And put 'data' into it. */ |
| 50 | struct list_node *new_node; |
| 51 | |
| 52 | if (head == NULL) { |
| 53 | return NULL; |
| 54 | } |
| 55 | |
| 56 | if (!(new_node = malloc(sizeof(struct list_node)))) { |
| 57 | return NULL; |
| 58 | } |
| 59 | |
| 60 | new_node->data = data; |
| 61 | new_node->next = head->next; |
| 62 | new_node->compare = head->compare; |
| 63 | new_node->dump = head->dump; |
| 64 | head->next = new_node; |
| 65 | |
| 66 | return new_node; |
| 67 | } |
| 68 | |
| 69 | int is_list_empty(struct list_node *head) |
| 70 | { |
| 71 | return (head == NULL || head->next == NULL); |
| 72 | } |
| 73 | |
| 74 | /* |
| 75 | * Delink and de-allocate 'node'. |
| 76 | */ |
| 77 | int remove_list_node(struct list_node *head, struct list_node *del_node) |
| 78 | { |
| 79 | struct list_node *current_node; |
| 80 | struct list_node *saved_node; |
| 81 | |
| 82 | if (head == NULL || head->next == NULL) { |
| 83 | return -1; |
| 84 | } |
| 85 | |
| 86 | current_node = head->next; |
| 87 | saved_node = head; |
| 88 | |
| 89 | while (current_node && current_node != del_node) { |
| 90 | saved_node = current_node; |
| 91 | current_node = current_node->next; |
| 92 | } |
| 93 | |
| 94 | if (saved_node) { |
| 95 | if (current_node) { |
| 96 | saved_node->next = current_node->next; |
| 97 | } else { |
| 98 | /* Node not found. */ |
| 99 | return -1; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | if (del_node) { |
| 104 | free(del_node); |
| 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | void dump_list(struct list_node *head) |
| 111 | { |
| 112 | struct list_node *current_node = head; |
| 113 | |
| 114 | if (head == NULL) |
| 115 | return; |
| 116 | |
| 117 | printf("List:\n"); |
| 118 | |
| 119 | while ((current_node = current_node->next)) { |
| 120 | if (current_node->dump) { |
| 121 | current_node->dump(current_node->data); |
| 122 | } |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | struct list_node *find_node(struct list_node *head, void *comparison_data) |
| 127 | { |
| 128 | struct list_node *current_node = head; |
| 129 | |
| 130 | if (head == NULL) |
| 131 | return NULL; |
| 132 | |
| 133 | while ((current_node = current_node->next)) { |
| 134 | if (current_node->compare) { |
| 135 | if (current_node->compare(current_node->data, |
| 136 | comparison_data) == 0) { |
| 137 | /* Match found. Return current_node. */ |
| 138 | return current_node; |
| 139 | } |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | /* No match found. */ |
| 144 | return NULL; |
| 145 | } |