Function for retreiving a list of friend numbers

This should allow clients to sync the Tox friend list with their UI/etc.
lists.

1 files changed, 34 insertions, 0 deletions

diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index f97a3320..90d4e43d 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -1052,3 +1052,37 @@ int Messenger_load(Messenger *m, uint8_t *data, uint32_t length)
 
     return 0;
 }
+
+/* Allocate and return a list of valid friend id's. List must be freed by the
+ * caller.
+ *
+ * retun 0 if success.
+ * return -1 if failure.
+ */
+int get_friendlist(Messenger *m, int **out_list, uint32_t *out_list_length)
+{
+    uint32_t i;
+
+    *out_list_length = 0;
+
+    if (m->numfriends == 0) {
+        *out_list = NULL;
+        return 0;
+    }
+
+    *out_list = malloc(m->numfriends * sizeof(int));
+
+    if (*out_list == NULL) {
+        return -1;
+    }
+
+    for (i = 0; i < m->numfriends; i++) {
+        if (m->friendlist[i].status > 0) {
+            (*out_list)[i] = i;
+            (*out_list_length)++;
+        }
+    }
+
+    return 0;
+}
+