Commit | Line | Data |
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f8051b35 JB |
1 | #include <stdlib.h> |
2 | ||
3 | #include "clist.h" | |
4 | ||
5 | link_t* list_new(int value) { | |
8f2b2843 JB |
6 | link_t* link_new; |
7 | link_new = malloc(sizeof(link_t)); | |
8 | link_new->value = value; | |
9 | link_new->next = NULL; | |
10 | return link_new; | |
f8051b35 JB |
11 | } |
12 | ||
13 | link_t* list_append(link_t* head, int value) { | |
14 | ||
15 | if (head == NULL) { | |
16 | return head = list_new(value); | |
17 | } else { | |
18 | link_t* head_first = head; | |
19 | while (head->next != NULL) { | |
20 | head = head->next; | |
21 | } | |
22 | head->next = list_new(value); | |
23 | return head_first; | |
24 | } | |
25 | } | |
26 | ||
27 | link_t* list_prepend(link_t* head, int value) { | |
28 | link_t* first_link = list_new(value); | |
29 | ||
30 | first_link->next = head; | |
31 | return first_link; | |
32 | } | |
33 | ||
0d650b41 JB |
34 | link_t* list_insert(link_t* head, unsigned index, int value) { |
35 | link_t* link_insrt = list_new(value); | |
36 | link_t* head_first = head; | |
37 | //link_t* head_prev = NULL; | |
38 | link_t* head_next = NULL; | |
39 | ||
40 | for (unsigned i = 0; i < index; i++) { | |
41 | head = head->next; | |
42 | } | |
43 | //head_prev = head; | |
44 | head->next = link_insrt; | |
45 | head_next = head->next; | |
46 | head = link_insrt; | |
47 | head->next = head_next; | |
48 | return head_first; | |
49 | } | |
50 | ||
51 | link_t* list_delete(link_t* head, unsigned index) { | |
52 | link_t* head_first = head; | |
53 | link_t* head_prev = NULL; | |
54 | link_t* head_next = NULL; | |
55 | ||
56 | if (index == 0) { | |
57 | head_next = head->next; | |
58 | free(head); | |
59 | head = head_next; | |
60 | return head; | |
61 | } else { | |
62 | for (unsigned i = 0; i < index-1; i++) { | |
63 | head = head->next; | |
64 | } | |
65 | head_prev = head; | |
66 | head = head->next; | |
67 | head_next = head->next; | |
68 | free(head); | |
69 | head = head_prev; | |
70 | head->next = head_next; | |
71 | return head_first; | |
72 | } | |
73 | } | |
74 | ||
f8051b35 | 75 | unsigned list_count(link_t* head) { |
490c6927 | 76 | int count = 0; |
f8051b35 | 77 | |
8f2b2843 | 78 | while (head != NULL) { |
f8051b35 JB |
79 | ++count; |
80 | head = head->next; | |
81 | } | |
82 | return count; | |
83 | } | |
84 | ||
85 | void list_set(link_t* head, unsigned index, int value) { | |
8f2b2843 | 86 | unsigned count = 0; |
f8051b35 | 87 | |
8f2b2843 JB |
88 | while (head != NULL && count < index) { |
89 | ++count; | |
f8051b35 JB |
90 | head = head->next; |
91 | } | |
8f2b2843 | 92 | if (head != NULL) { head->value = value; } |
f8051b35 JB |
93 | } |
94 | ||
95 | int list_get(link_t* head, unsigned index) { | |
8f2b2843 JB |
96 | unsigned count = 0; |
97 | ||
98 | while (head != NULL && count < index) { | |
99 | ++count; | |
100 | head = head->next; | |
101 | } | |
102 | if (head != NULL) { | |
f8051b35 | 103 | return head->value; |
8f2b2843 | 104 | } else { |
f8051b35 JB |
105 | return -1; |
106 | } | |
107 | } | |
108 | ||
109 | void list_clear(link_t* link) { | |
8f2b2843 | 110 | link_t* next_link = NULL; |
f8051b35 JB |
111 | |
112 | while (link != NULL) { | |
8f2b2843 | 113 | next_link = link->next; |
f8051b35 JB |
114 | free(link); |
115 | link = next_link; | |
116 | } | |
117 | } |