1 files changed, 86 insertions, 0 deletions
diff --git a/os/hal/lib/streams/nullstreams.h b/os/hal/lib/streams/nullstreams.h
new file mode 100644
index 000000000..dd5c4e775
--- /dev/null
+++ b/os/hal/lib/streams/nullstreams.h
@@ -0,0 +1,86 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    nullstreams.h
+ * @brief   Null streams structures and macros.
+ 
+ * @addtogroup null_streams
+ * @{
+ */
+
+#ifndef _NULLSTREAMS_H_
+#define _NULLSTREAMS_H_
+
+/*===========================================================================*/
+/* Driver constants.                                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks.                                       */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types.                                         */
+/*===========================================================================*/
+
+/**
+ * @brief   @p NullStream specific data.
+ */
+#define _null_stream_data                                                   \
+  _base_sequential_stream_data
+
+/**
+ * @brief   @p NullStream virtual methods table.
+ */
+struct NullStreamVMT {
+  _base_sequential_stream_methods
+};
+
+/**
+ * @extends BaseSequentialStream
+ *
+ * @brief   Null stream object.
+ */
+typedef struct {
+  /** @brief Virtual Methods Table.*/
+  const struct NullStreamVMT *vmt;
+  _null_stream_data
+} NullStream;
+
+/*===========================================================================*/
+/* Driver macros.                                                            */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void nullObjectInit(NullStream *nsp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _NULLSTREAMS_H_ */
+
+/** @} */