Initial Commit

.svn/pristine/c3/c3173e147f94545556908fdfbb5a64a9b8e0cd37.svn-base

@@ -0,0 +1,24 @@
+#include <boost/crc.hpp>
+
+extern "C"
+{
+   short crc12 (unsigned char const * data, int length);
+   bool crc12_check (unsigned char const * data, int length);
+}
+
+namespace
+{
+  unsigned long constexpr truncated_polynomial = 0xc06;
+}
+
+// assumes CRC is last 16 bits of the data and is set to zero
+// caller should assign the returned CRC into the message in big endian byte order
+short crc12 (unsigned char const * data, int length)
+{
+    return boost::augmented_crc<12, truncated_polynomial> (data, length);
+}
+
+bool crc12_check (unsigned char const * data, int length)
+{
+   return !boost::augmented_crc<12, truncated_polynomial> (data, length);
+}