muldiv.h 906 B

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  1. /* Copyright (c) 2003-2004, Roger Dingledine
  2. * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
  3. * Copyright (c) 2007-2018, The Tor Project, Inc. */
  4. /* See LICENSE for licensing information */
  5. /**
  6. * \file muldiv.h
  7. *
  8. * \brief Header for muldiv.c
  9. **/
  10. #ifndef TOR_INTMATH_MULDIV_H
  11. #define TOR_INTMATH_MULDIV_H
  12. #include "lib/cc/torint.h"
  13. unsigned round_to_next_multiple_of(unsigned number, unsigned divisor);
  14. uint32_t round_uint32_to_next_multiple_of(uint32_t number, uint32_t divisor);
  15. uint64_t round_uint64_to_next_multiple_of(uint64_t number, uint64_t divisor);
  16. void simplify_fraction64(uint64_t *numer, uint64_t *denom);
  17. /* Compute the CEIL of <b>a</b> divided by <b>b</b>, for nonnegative <b>a</b>
  18. * and positive <b>b</b>. Works on integer types only. Not defined if a+(b-1)
  19. * can overflow. */
  20. #define CEIL_DIV(a,b) (((a)+((b)-1))/(b))
  21. #endif /* !defined(TOR_INTMATH_MULDIV_H) */