thin-provisioning-tools/checksum.cc
2011-09-16 10:08:53 +01:00

32 lines
565 B
C++

#include "checksum.h"
#include <boost/crc.hpp>
using namespace base;
//----------------------------------------------------------------
crc32c::crc32c(uint32_t xor_value)
: xor_value_(xor_value),
sum_(0)
{
}
void
crc32c::append(void const *buffer, unsigned len)
{
uint32_t const powers = 0x1EDC6F41;
boost::crc_basic<32> crc(powers, 0xffffffff, 0, true, true);
crc.process_bytes(buffer, len);
sum_ = crc.checksum();
}
uint32_t
crc32c::get_sum() const
{
return sum_ ^ xor_value_;
}
//----------------------------------------------------------------