ccan/crcsync/test/run-roll.c

   1 #include "crcsync/crcsync.h"
   2 #include "crcsync/crcsync.c"
   3 #include "tap/tap.h"
   4 #include <stdlib.h>
   5 #include <stdbool.h>
   6
   7 /* FIXME: ccanize. */
   8 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
   9
  10 static void test_roll(unsigned int wsize)
  11 {
  12         uint8_t data[wsize * 2];
  13         uint64_t uncrc_tab[256];
  14         unsigned int i;
  15
  16         init_uncrc_tab(uncrc_tab, wsize);
  17
  18         for (i = 0; i < ARRAY_SIZE(data); i++)
  19                 data[i] = random();
  20
  21         for (i = 1; i < ARRAY_SIZE(data) - wsize; i++) {
  22                 uint64_t rollcrc, crc;
  23
  24                 crc = crc64_iso(0, data+i, wsize);
  25                 rollcrc = crc_roll(crc64_iso(0, data+i-1, wsize),
  26                                    data[i-1], data[i+wsize-1], uncrc_tab);
  27
  28                 ok(crc == rollcrc, "wsize %u, i %u", wsize, i);
  29         }
  30 }
  31
  32 int main(int argc, char *argv[])
  33 {
  34         plan_tests(100 - 1 + 128 - 1);
  35         test_roll(100);
  36         test_roll(128);
  37         return exit_status();
  38 }