text: /* Copyright (c) 2003-2004, Roger Dingledine
   * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
   * Copyright (c) 2007-2021, The Tor Project, Inc. */
  /* See LICENSE for licensing information */
  
  /**
   * \file muldiv.h
   *
   * \brief Header for muldiv.c
   **/
  
  #ifndef TOR_INTMATH_MULDIV_H
  #define TOR_INTMATH_MULDIV_H
  
  #include "lib/cc/torint.h"
  
  unsigned round_to_next_multiple_of(unsigned number, unsigned divisor);
  uint32_t round_uint32_to_next_multiple_of(uint32_t number, uint32_t divisor);
  uint64_t round_uint64_to_next_multiple_of(uint64_t number, uint64_t divisor);
  
  uint64_t tor_mul_u64_nowrap(uint64_t a, uint64_t b);
  
  void simplify_fraction64(uint64_t *numer, uint64_t *denom);
  
  /* Compute the CEIL of <b>a</b> divided by <b>b</b>, for nonnegative <b>a</b>
   * and positive <b>b</b>.  Works on integer types only. Not defined if a+(b-1)
   * can overflow. */
  #define CEIL_DIV(a,b) (((a)+((b)-1))/(b))
  
  #endif /* !defined(TOR_INTMATH_MULDIV_H) */
  