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Bits_test.c 1.7 KB

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  1. /* vim: set expandtab ts=4 sw=4: */
  2. /*
  3. * You may redistribute this program and/or modify it under the terms of
  4. * the GNU General Public License as published by the Free Software Foundation,
  5. * either version 3 of the License, or (at your option) any later version.
  6. *
  7. * This program is distributed in the hope that it will be useful,
  8. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  10. * GNU General Public License for more details.
  11. *
  12. * You should have received a copy of the GNU General Public License
  13. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  14. */
  15. #include "crypto/random/Random.h"
  16. #include "memory/MallocAllocator.h"
  17. #include "util/Bits.h"
  18. #include "util/Endian.h"
  19. #include <inttypes.h>
  20. #include <stdio.h>
  21. #include "util/Assert.h"
  22. static void log2x64(struct Random* rand)
  23. {
  24. Assert_true(Bits_log2x64(1) == 0);
  25. Assert_true(Bits_log2x64_stupid(1) == Bits_log2x64(1));
  26. Assert_true(Bits_log2x64_stupid(0) == Bits_log2x64(0));
  27. for (int i = 0; i < 1000; i++) {
  28. uint64_t num = Random_uint64(rand);
  29. Assert_true(Bits_log2x64_stupid(num) == Bits_log2x64(num));
  30. }
  31. }
  32. int main()
  33. {
  34. struct Allocator* alloc = MallocAllocator_new(20000);
  35. struct Random* rand = Random_new(alloc, NULL, NULL);
  36. log2x64(rand);
  37. uint64_t x;
  38. Random_bytes(rand, (uint8_t*) &x, 8);
  39. printf("x = 0x%016" PRIx64 "\n", x);
  40. Assert_true(Bits_bitReverse64(Bits_bitReverse64(x)) == x);
  41. Assert_true(
  42. Bits_bitReverse64(Endian_byteSwap64(Bits_bitReverse64(x))) == Endian_byteSwap64(x));
  43. Assert_true(Bits_bitReverse64(1) == ((uint64_t)1)<<63);
  44. Assert_true(Bits_bitReverse64(0) == 0);
  45. Allocator_free(alloc);
  46. return 0;
  47. }