Easy CRC checksums with Boost

The Boost CRC library makes it painless to compute the CRC checksum on data.  For HDL designers, the library can be useful in generating test vectors for use in testbenches for CRC modules.  The Boost documentation provides a complicated example program that shows how to use the library, but I stripped it down to create an even simpler example of how to use do a CCITT CRC-16 checksum.

#include <boost/crc.hpp>
#include <boost/integer.hpp>
#include <cassert>

int main(int argc, char *argv[])
  unsigned char const test_data[] = { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 };
  std::size_t const test_data_len = sizeof(test_data) /   sizeof(test_data[0]);
  boost::uint16_t const expected_result = 0x29B1;

  boost::crc_ccitt_type checksum_agent;
  checksum_agent.process_bytes(test_data, test_data_len);

  assert(checksum_agent.checksum() == expected_result);
  return 0;

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