1 files changed, 34 insertions, 0 deletions
diff --git a/lib/pbdrv/pb-write.c b/lib/pbdrv/pb-write.c
index 65a2932..752a4ac 100644
--- a/lib/pbdrv/pb-write.c
+++ b/lib/pbdrv/pb-write.c
@@ -1 +1,35 @@
+#include <mpack.h>
+
 #include "pb-write.h"
+
+typedef struct {
+	mpack_writer_t writer;
+	pbdrv_buf_t buf;
+} pbdrv_writer_t;
+
+static pbdrv_writer_t pbdrv_write_init() {
+	pbdrv_writer_t writer;
+	mpack_writer_init_growable(&writer.writer, &writer.buf.data, &writer.buf.size);
+	return writer;
+}
+
+static pbdrv_buf_t pbdrv_write_finish(pbdrv_writer_t * writer) {
+	if (mpack_writer_destroy(&writer->writer) != mpack_ok) {
+		writer->buf.data = NULL;
+		writer->buf.size = 0;
+	}
+	return writer->buf;
+}
+
+static void pbdrv_write_msg_header(pbdrv_writer_t * writer, pb_msg_header_t header) {
+	mpack_write_u8(&writer->writer, header.type);
+	mpack_write_u16(&writer->writer, header.sender);
+}
+
+pbdrv_buf_t pbdrv_write_cmd_req_set_state(pb_cmd_req_set_state_t data) {
+	pbdrv_writer_t writer = pbdrv_write_init();
+	pbdrv_write_msg_header(&writer, data.header);
+	mpack_write_u8(&writer.writer, data.state);
+	return pbdrv_write_finish(&writer);
+}
+