crccache/test_hash_small_invokations.c

   1 #include <sys/types.h>
   2 #include <crcsync/crcsync.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5
   6
   7 void validate(struct crc_context *crcctx)
   8 {
   9         char *getpos = "XXXXXX0123XXXXXXXXXX456789ABXCDEFZZX"; // same data but starting with two mismatch characters
  10         ssize_t remaining = strlen(getpos);
  11         long rd_block_rslt;
  12         while (remaining != 0)
  13         {
  14                 size_t ndigested = crc_read_block(crcctx, &rd_block_rslt, getpos, (remaining > 3) ? 3: remaining);
  15                 printf("read block rslt: %ld, ndigested: %zd\n", rd_block_rslt, ndigested);
  16                 getpos += ndigested;
  17                 remaining -= ndigested;
  18         }
  19         rd_block_rslt = crc_read_flush(crcctx);
  20         printf("flush rslt: %ld\n", rd_block_rslt);
  21         crc_reset_running_crcs(crcctx);
  22 }
  23
  24 int main(int argc, char *argv[])
  25 {
  26         char *tstdata = "0123456789ABCDEFZ";
  27         size_t nblocks = 4;
  28         uint64_t hashes[nblocks];
  29         size_t datalen = strlen(tstdata);
  30         size_t block_size = datalen/nblocks;
  31         crc_of_blocks(tstdata, datalen, block_size, 64, true, hashes); // set-up hashes
  32
  33
  34         size_t tail_size = block_size + datalen%nblocks;
  35         printf("block_size: %zd, tail_size: %zd, nblocks: %zd\n", block_size, tail_size, nblocks);
  36         struct crc_context *crcctx = crc_context_new(block_size, 64, hashes, nblocks, tail_size);
  37         printf("context initialized\n");
  38
  39         validate(crcctx);
  40         validate(crcctx);
  41
  42         crc_context_free(crcctx);
  43
  44
  45         return 0;
  46 }