This is a C++11 table-driven CRC calculator. The table is a constant expression suitable for ROM, generated using the constexpr table library. The CRC algorithm is also constexpr, so the check code for static messages can be evaluated at compile time. Here are examples for using the library:
#include <crc.hpp>
BOOST_AUTO_TEST_CASE( hello_world )
{
char message[] = "hello world";
BOOST_CHECK_EQUAL
( crc<32,koopman32()>().process_bytes("hello world", sizeof(message))
, 0x367bbd89
);
}
static_assert
( crc<32,koopman32(),0xffffffff>().process_cstring(u8"Γεια σας κόσμο") == 0x725e7825
, "Koopman32 CRC using initial remainder 0xffffffff value for 'Γεια σας κόσμο' should be 0x725e7825"
);
The constexpr-crc library is a header only library, so there is no object file to build or link. The library depends on Boost to calculate an integer type. A Boost Build Jamfile is included that builds the unit test.
The library requires compiler support for aggregate initialization. Version 4.7 or higher of GCC will work.