Fix compiler errors

src/client.c

@@ -1,4 +1,14 @@
 
+void http_client_conn_init(HTTP_ClientConn *conn)
+{
+    // TODO
+}
+
+void http_client_conn_free(HTTP_ClientConn *conn)
+{
+    // TODO
+}
+
 int http_client_init(HTTP_Client *client)
 {
     client->num_conns = 0;
@@ -35,22 +45,26 @@ int http_client_wakeup(HTTP_Client *client)
     return 0;
 }
 
-int http_client_get_builder(HTTP_Client *client, HTTP_RequestBuilder *builder)
+int http_client_get_builder(HTTP_Client *client,
+    HTTP_Response *response, HTTP_RequestBuilder *builder)
 {
     // TODO
 }
 
-void http_request_builder_line(HTTP_RequestBuilder builder, xxxx)
+void http_request_builder_url(HTTP_RequestBuilder builder,
+    HTTP_String url)
 {
     // TODO
 }
 
-void http_request_builder_header(HTTP_RequestBuilder builder, String str)
+void http_request_builder_header(HTTP_RequestBuilder builder,
+    HTTP_String str)
 {
     // TODO
 }
 
-void http_request_builder_body(HTTP_RequestBuilder builder, String str)
+void http_request_builder_body(HTTP_RequestBuilder builder,
+    HTTP_String str)
 {
     // TODO
 }
@@ -61,18 +75,19 @@ int http_request_builder_send(HTTP_RequestBuilder builder)
 }
 
 int http_client_register_events(HTTP_Client *client,
-    struct pollfd *polled, int max_polled)
+    EventRegister *reg)
 {
-    return socket_manager_register_events(
-        &client->sockets, polled, max_polled);
+    if (socket_manager_register_events(&client->sockets, reg) < 0)
+        return -1;
+    return 0;
 }
 
 int http_client_process_events(HTTP_Client *client,
-    struct pollfd *polled, int num_polled)
+    EventRegister *reg)
 {
     SocketEvent events[HTTP_CLIENT_CAPACITY];
     int num_events = socket_manager_translate_events(
-        &client->sockets, polled, num_polled);
+        &client->sockets, events, reg);
 
     for (int i = 0; i < num_events; i++) {
 
@@ -92,9 +107,9 @@ int http_client_process_events(HTTP_Client *client,
 }
 
 bool http_client_next_response(HTTP_Client *client,
-    HTTP_Response **response);
+    HTTP_Response **response)
 {
-    if (server->num_ready == 0)
+    if (client->num_ready == 0)
         return false;
 
     HTTP_ClientConn *conn = &client->conns[client->ready_head];