1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#include <curl/curl.h>
#include "llist.h"
#include "curl_memory.h"
/* this must be the last include file */
#include "memdebug.h"
/*
* @unittest: 1300
*/
void
Curl_llist_init(struct Curl_llist *l, Curl_llist_dtor dtor)
{
l->size = 0;
l->dtor = dtor;
l->head = NULL;
l->tail = NULL;
}
/*
* Curl_llist_insert_next()
*
* Inserts a new list element after the given one 'e'. If the given existing
* entry is NULL and the list already has elements, the new one will be
* inserted first in the list.
*
* The 'ne' argument should be a pointer into the object to store.
*
* @unittest: 1300
*/
void
Curl_llist_insert_next(struct Curl_llist *list, struct Curl_llist_element *e,
const void *p,
struct Curl_llist_element *ne)
{
ne->ptr = (void *) p;
if(list->size == 0) {
list->head = ne;
list->head->prev = NULL;
list->head->next = NULL;
list->tail = ne;
}
else {
/* if 'e' is NULL here, we insert the new element first in the list */
ne->next = e?e->next:list->head;
ne->prev = e;
if(!e) {
list->head->prev = ne;
list->head = ne;
}
else if(e->next) {
e->next->prev = ne;
}
else {
list->tail = ne;
}
if(e)
e->next = ne;
}
++list->size;
}
/*
* @unittest: 1300
*/
void
Curl_llist_remove(struct Curl_llist *list, struct Curl_llist_element *e,
void *user)
{
void *ptr;
if(e == NULL || list->size == 0)
return;
if(e == list->head) {
list->head = e->next;
if(list->head == NULL)
list->tail = NULL;
else
e->next->prev = NULL;
}
else {
if(!e->prev)
list->head = e->next;
else
e->prev->next = e->next;
if(!e->next)
list->tail = e->prev;
else
e->next->prev = e->prev;
}
ptr = e->ptr;
e->ptr = NULL;
e->prev = NULL;
e->next = NULL;
--list->size;
/* call the dtor() last for when it actually frees the 'e' memory itself */
if(list->dtor)
list->dtor(user, ptr);
}
void
Curl_llist_destroy(struct Curl_llist *list, void *user)
{
if(list) {
while(list->size > 0)
Curl_llist_remove(list, list->tail, user);
}
}
size_t
Curl_llist_count(struct Curl_llist *list)
{
return list->size;
}
|
