diff options
Diffstat (limited to 'libcurl/src/lib/slist.c')
| -rw-r--r-- | libcurl/src/lib/slist.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/libcurl/src/lib/slist.c b/libcurl/src/lib/slist.c new file mode 100644 index 0000000..78ecf54 --- /dev/null +++ b/libcurl/src/lib/slist.c @@ -0,0 +1,143 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * 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
+ * are also available at http://curl.haxx.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 "slist.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/* returns last node in linked list */
+static struct curl_slist *slist_get_last(struct curl_slist *list)
+{
+ struct curl_slist *item;
+
+ /* if caller passed us a NULL, return now */
+ if(!list)
+ return NULL;
+
+ /* loop through to find the last item */
+ item = list;
+ while(item->next) {
+ item = item->next;
+ }
+ return item;
+}
+
+/*
+ * 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 an error occurs, NULL is returned and the string argument is NOT
+ * released.
+ */
+CURL_STATIC struct curl_slist *Curl_slist_append_nodup(struct curl_slist *list, char *data)
+{
+ struct curl_slist *last;
+ struct curl_slist *new_item;
+
+ DEBUGASSERT(data);
+
+ new_item = malloc(sizeof(struct curl_slist));
+ if(!new_item)
+ return NULL;
+
+ 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;
+}
+
+/*
+ * 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(!dupdata)
+ return NULL;
+
+ list = Curl_slist_append_nodup(list, dupdata);
+ if(!list)
+ free(dupdata);
+
+ return list;
+}
+
+/*
+ * Curl_slist_duplicate() duplicates a linked list. It always returns the
+ * address of the first record of the cloned list or NULL in case of an
+ * error (or if the input list was NULL).
+ */
+CURL_STATIC struct curl_slist *Curl_slist_duplicate(struct curl_slist *inlist)
+{
+ struct curl_slist *outlist = NULL;
+ struct curl_slist *tmp;
+
+ while(inlist) {
+ tmp = curl_slist_append(outlist, inlist->data);
+
+ if(!tmp) {
+ curl_slist_free_all(outlist);
+ return NULL;
+ }
+
+ outlist = tmp;
+ inlist = inlist->next;
+ }
+ return outlist;
+}
+
+/* be nice and clean up resources */
+void curl_slist_free_all(struct curl_slist *list)
+{
+ struct curl_slist *next;
+ struct curl_slist *item;
+
+ if(!list)
+ return;
+
+ item = list;
+ do {
+ next = item->next;
+ Curl_safefree(item->data);
+ free(item);
+ item = next;
+ } while(next);
+}
+
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