git.ozlabs.org Git - ccan/blob - ccan/crcsync/test/run-crc.c

   1 #include "crcsync/crcsync.h"
   2 #include "crcsync/crcsync.c"
   3 #include "tap/tap.h"
   4
   5 int main(int argc, char *argv[])
   6 {
   7         char buffer[1024];
   8         unsigned int i, j;
   9         uint32_t crcs[12] = { 0xFFFFF, 0xdeadf00d };
  10
  11         plan_tests(3 + 8192);
  12
  13         /* Simple test (we know currently crc of 0s is 0) */
  14         memset(buffer, 0, sizeof(buffer));
  15         crc_of_blocks(buffer, sizeof(buffer), sizeof(buffer), 32, crcs);
  16         ok1(crcs[0] == 0);
  17         crc_of_blocks(buffer, sizeof(buffer), sizeof(buffer)/2, 32, crcs);
  18         ok1(crcs[0] == 0);
  19         ok1(crcs[1] == 0);
  20
  21         /* We know they're using crc32c. */
  22         for (i = 0; i < sizeof(buffer); i++) {
  23                 buffer[i] = i;
  24                 crc_of_blocks(buffer, sizeof(buffer), sizeof(buffer)/7,
  25                               32, crcs);
  26                 for (j = 0; j < sizeof(buffer); j += sizeof(buffer)/7) {
  27                         unsigned int len = sizeof(buffer)/7;
  28                         if (j + len > sizeof(buffer))
  29                                 len = sizeof(buffer) - j;
  30
  31                         ok1(crc32c(0, buffer + j, len) == crcs[j/(sizeof(buffer)/7)]);
  32                 }
  33         }
  34
  35         return exit_status();
  36 }