crc32

#include <cstdio>

int main(int argc, char **argv)
{
  for (int i = 1; i < argc; i++)
  {
    unsigned int  crc = 0U;
    for (int j = 0; argv[i][j]; j++)
    {
      unsigned char c = argv[i][j];
      for (int k = 0; k < 8; k++, c = c >> 1)
        crc = (crc >> 1) ^ ((0U - ((crc ^ c) & 1U)) & 0xEDB88320U);
    }
    std::printf("'%s': 0x%08X (%u)\n", argv[i], crc, crc);
  }
  return 0;
}