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-rw-r--r--lib/slist.c61
1 files changed, 39 insertions, 22 deletions
diff --git a/lib/slist.c b/lib/slist.c
index 92c699ec9..8e52c7061 100644
--- a/lib/slist.c
+++ b/lib/slist.c
@@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2013, 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
@@ -46,41 +46,58 @@ static struct curl_slist *slist_get_last(struct curl_slist *list)
}
/*
- * curl_slist_append() appends a string to the linked list. It always returns
+ * Curl_slist_append_nodup() appends a string to the linked list. Rather than
+ * copying the string in dynamic storage, it takes its ownership. The string
+ * should have been malloc()ated. Curl_slist_append_nodup always returns
* the address of the first record, so that you can use this function as an
- * initialization function as well as an append function. If you find this
- * bothersome, then simply create a separate _init function and call it
- * appropriately from within the program.
+ * initialization function as well as an append function.
+ * If an error occurs, NULL is returned and the string argument is NOT
+ * released.
*/
-struct curl_slist *curl_slist_append(struct curl_slist *list,
- const char *data)
+struct curl_slist *Curl_slist_append_nodup(struct curl_slist *list, char *data)
{
struct curl_slist *last;
struct curl_slist *new_item;
+ if(!data)
+ return NULL;
+
new_item = malloc(sizeof(struct curl_slist));
- if(new_item) {
- char *dupdata = strdup(data);
- if(dupdata) {
- new_item->next = NULL;
- new_item->data = dupdata;
- }
- else {
- free(new_item);
- return NULL;
- }
- }
- else
+ if(!new_item)
return NULL;
- if(list) {
+ new_item->next = NULL;
+ new_item->data = data;
+
+ /* if this is the first item, then new_item *is* the list */
+ if(!list)
+ return new_item;
+
last = slist_get_last(list);
last->next = new_item;
return list;
}
- /* if this is the first item, then new_item *is* the list */
- return new_item;
+/*
+ * curl_slist_append() appends a string to the linked list. It always returns
+ * the address of the first record, so that you can use this function as an
+ * initialization function as well as an append function. If you find this
+ * bothersome, then simply create a separate _init function and call it
+ * appropriately from within the program.
+ */
+struct curl_slist *curl_slist_append(struct curl_slist *list,
+ const char *data)
+{
+ char *dupdata = strdup(data);
+
+ if(!data)
+ return NULL;
+
+ list = Curl_slist_append_nodup(list, dupdata);
+ if(!list)
+ free(dupdata);
+
+ return list;
}
/*