Add serializer service for protobuf
Implements a serializer service for protobuf using nanopb. Adds external
component to fetch nanopb.
Change-Id: I31464be0e38d78bdf543e9f30bd51218e935dc9d
Signed-off-by: Julian Hall <julian.hall@arm.com>
diff --git a/components/service/common/serializer/protobuf/pb_helper.h b/components/service/common/serializer/protobuf/pb_helper.h
new file mode 100644
index 0000000..1f109b0
--- /dev/null
+++ b/components/service/common/serializer/protobuf/pb_helper.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PB_HELPER_H
+#define PB_HELPER_H
+
+#include <pb.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Returns an initialised pb_callback_t structure for encoding a variable length byte array */
+extern pb_callback_t pb_out_byte_array(const pb_bytes_array_t *byte_array);
+
+/* Returns an initialised pb_callback_t structure for decoding a variable length byte array */
+extern pb_callback_t pb_in_byte_array(pb_bytes_array_t *byte_array);
+
+/* Malloc space for a pb_bytes_array_t object with space for the requested number of bytes */
+extern pb_bytes_array_t *pb_malloc_byte_array(size_t num_bytes);
+
+/* Malloc space for a pb_bytes_array_t object containing the given string */
+extern pb_bytes_array_t *pb_malloc_byte_array_containing_string(const char *str);
+
+/* Malloc space for a pb_bytes_array_t object containing the given bytes */
+extern pb_bytes_array_t *pb_malloc_byte_array_containing_bytes(const uint8_t *buf, size_t num_bytes);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* PB_HELPER_H */