Fix style in some header files.

* Enums must by typedef'd.
* Comments at end of `#define` must be `//` comments.
* Typedef structs must not be anonymous.
* `;` at the end of a `#define` is invalid.
* Callback typedefs must list their parameter names.
* No nested structs.
* No inline use of function pointer types. Only typedef'd callback types
  are allowed.
* Enum types are spelled in Camelsnake_Case.
* The argument to `#error` must be a string literal.

1 files changed, 3 insertions, 2 deletions

diff --git a/toxcore/friend_requests.h b/toxcore/friend_requests.h
index 97cd3164..77c3af68 100644
--- a/toxcore/friend_requests.h
+++ b/toxcore/friend_requests.h
@@ -41,14 +41,15 @@ uint32_t get_nospam(const Friend_Requests *fr);
  */
 int remove_request_received(Friend_Requests *fr, const uint8_t *real_pk);
 
-typedef void fr_friend_request_cb(void *, const uint8_t *, const uint8_t *, size_t, void *);
+typedef void fr_friend_request_cb(void *object, const uint8_t *public_key, const uint8_t *message, size_t length,
+                                  void *user_data);
 
 /* Set the function that will be executed when a friend request for us is received.
  *  Function format is function(uint8_t * public_key, uint8_t * data, size_t length, void * userdata)
  */
 void callback_friendrequest(Friend_Requests *fr, fr_friend_request_cb *function, void *object);
 
-typedef int filter_function_cb(const uint8_t *, void *);
+typedef int filter_function_cb(const uint8_t *public_key, void *user_data);
 
 /* Set the function used to check if a friend request should be displayed to the user or not.
  * Function format is int function(uint8_t * public_key, void * userdata)