tests/bits/bitrev_test.c

   1
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <stdint.h>
   5 #include <string.h>
   6
   7 #include <osmocom/core/utils.h>
   8 #include <osmocom/core/bits.h>
   9
  10 static const uint8_t input[] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 };
  11 static const uint8_t exp_out[] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
  12
  13 int main(int argc, char **argv)
  14 {
  15         uint8_t out[ARRAY_SIZE(input)];
  16         unsigned int offs;
  17
  18         for (offs = 0; offs < sizeof(out); offs++) {
  19                 uint8_t *start = out + offs;
  20                 uint8_t len = sizeof(out) - offs;
  21
  22                 memcpy(out, input, sizeof(out));
  23
  24                 printf("INORDER:  %s\n", osmo_hexdump(start, len));
  25                 osmo_revbytebits_buf(start, len);
  26                 printf("REVERSED: %s\n", osmo_hexdump(start, len));
  27                 if (memcmp(start, exp_out + offs, len)) {
  28                         printf("EXPECTED: %s\n", osmo_hexdump(exp_out+offs, len));
  29                         fprintf(stderr, "REVERSED != EXPECTED!\n");
  30                         exit(1);
  31                 }
  32                 printf("\n");
  33         }
  34
  35         return 0;
  36 }