bn_mp_abs.c 1014 B

12345678910111213141516171819202122232425262728293031323334353637383940414243
  1. #include <tommath.h>
  2. #ifdef BN_MP_ABS_C
  3. /* LibTomMath, multiple-precision integer library -- Tom St Denis
  4. *
  5. * LibTomMath is a library that provides multiple-precision
  6. * integer arithmetic as well as number theoretic functionality.
  7. *
  8. * The library was designed directly after the MPI library by
  9. * Michael Fromberger but has been written from scratch with
  10. * additional optimizations in place.
  11. *
  12. * The library is free for all purposes without any express
  13. * guarantee it works.
  14. *
  15. * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
  16. */
  17. /* b = |a|
  18. *
  19. * Simple function copies the input and fixes the sign to positive
  20. */
  21. int
  22. mp_abs (mp_int * a, mp_int * b)
  23. {
  24. int res;
  25. /* copy a to b */
  26. if (a != b) {
  27. if ((res = mp_copy (a, b)) != MP_OKAY) {
  28. return res;
  29. }
  30. }
  31. /* force the sign of b to positive */
  32. b->sign = MP_ZPOS;
  33. return MP_OKAY;
  34. }
  35. #endif
  36. /* $Source: /cvs/libtom/libtommath/bn_mp_abs.c,v $ */
  37. /* $Revision: 1.3 $ */
  38. /* $Date: 2006/03/31 14:18:44 $ */