usb: add ds client api

libraries/libvapours/include/vapours/results.hpp

@@ -59,6 +59,7 @@
 #include <vapours/results/svc_results.hpp>
 #include <vapours/results/time_results.hpp>
 #include <vapours/results/updater_results.hpp>
+#include <vapours/results/usb_results.hpp>
 #include <vapours/results/vi_results.hpp>
 
 /* Unofficial. */

libraries/libvapours/include/vapours/results/usb_results.hpp

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <vapours/results/results_common.hpp>
+
+namespace ams::usb {
+
+    R_DEFINE_NAMESPACE_RESULT_MODULE(140);
+
+    R_DEFINE_ERROR_RESULT(NotInitialized,       0);
+    R_DEFINE_ERROR_RESULT(AlreadyInitialized,   1);
+
+    R_DEFINE_ERROR_RANGE(InvalidParameter, 100, 199);
+        R_DEFINE_ERROR_RESULT(AlignmentError, 103);
+
+    R_DEFINE_ERROR_RESULT(OperationDenied,    201);
+    R_DEFINE_ERROR_RESULT(MemAllocFailure,    202);
+    R_DEFINE_ERROR_RESULT(ResourceBusy,       206);
+    R_DEFINE_ERROR_RESULT(InternalStateError, 207);
+
+    R_DEFINE_ERROR_RESULT(TransactionError,   401);
+    R_DEFINE_ERROR_RESULT(Interrupted,        409);
+
+}