1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
25 #include <curl/curl.h>
29 /* The last #include files should be: */
30 #include "curl_memory.h"
33 /* returns last node in linked list */
34 static struct curl_slist *slist_get_last(struct curl_slist *list)
36 struct curl_slist *item;
38 /* if caller passed us a NULL, return now */
42 /* loop through to find the last item */
51 * Curl_slist_append_nodup() appends a string to the linked list. Rather than
52 * copying the string in dynamic storage, it takes its ownership. The string
53 * should have been malloc()ated. Curl_slist_append_nodup always returns
54 * the address of the first record, so that you can use this function as an
55 * initialization function as well as an append function.
56 * If an error occurs, NULL is returned and the string argument is NOT
59 struct curl_slist *Curl_slist_append_nodup(struct curl_slist *list, char *data)
61 struct curl_slist *last;
62 struct curl_slist *new_item;
66 new_item = malloc(sizeof(struct curl_slist));
70 new_item->next = NULL;
71 new_item->data = data;
73 /* if this is the first item, then new_item *is* the list */
77 last = slist_get_last(list);
78 last->next = new_item;
83 * curl_slist_append() appends a string to the linked list. It always returns
84 * the address of the first record, so that you can use this function as an
85 * initialization function as well as an append function. If you find this
86 * bothersome, then simply create a separate _init function and call it
87 * appropriately from within the program.
89 struct curl_slist *curl_slist_append(struct curl_slist *list,
92 char *dupdata = strdup(data);
97 list = Curl_slist_append_nodup(list, dupdata);
105 * Curl_slist_duplicate() duplicates a linked list. It always returns the
106 * address of the first record of the cloned list or NULL in case of an
107 * error (or if the input list was NULL).
109 struct curl_slist *Curl_slist_duplicate(struct curl_slist *inlist)
111 struct curl_slist *outlist = NULL;
112 struct curl_slist *tmp;
115 tmp = curl_slist_append(outlist, inlist->data);
118 curl_slist_free_all(outlist);
123 inlist = inlist->next;
128 /* be nice and clean up resources */
129 void curl_slist_free_all(struct curl_slist *list)
131 struct curl_slist *next;
132 struct curl_slist *item;
140 Curl_safefree(item->data);