CRC32 C or C++ implementation

/* Copyright (C) 1986 Gary S. Brown.  You may use this program, or
   code or tables extracted from it, as desired without restriction.*/

MHASH td = mhash_init(MHASH_CRC32);

 if (td == MHASH_FAILED) return -1; // handle failure

 mhash(td, s, strlen(s));

 unsigned int digest = 0; // crc32 will be stored here

 mhash_deinit(td, &digest);

 // do endian swap here if desired