DataTypeSignature

libuavcan/src/data_type.cpp

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2014 Pavel Kirienko <pavel.kirienko@gmail.com>
+ */
+
+#include <cstdio>
+#include <cassert>
+#include <uavcan/internal/data_type.hpp>
+
+namespace uavcan
+{
+/*
+ * DataTypeSignature
+ */
+void DataTypeSignature::mixin64(uint64_t x)
+{
+    DataTypeSignatureCRC crc = DataTypeSignatureCRC::extend(value_);
+    for (int i = 0; i < 64; i += 8)   // LSB first
+        crc.add((x >> i) & 0xFF);
+    value_ = crc.get();
+}
+
+void DataTypeSignature::extend(DataTypeSignature dts)
+{
+    const uint64_t y = value_;
+    mixin64(dts.get());
+    mixin64(y);
+}
+
+TransferCRC DataTypeSignature::toTransferCRC() const
+{
+    TransferCRC tcrc;
+    for (int i = 0; i < 64; i += 8)    // LSB first
+        tcrc.add((value_ >> i) & 0xFF);
+    return tcrc;
+}
+
+}