muldiv.h (960B)
1 /* Copyright (c) 2003-2004, Roger Dingledine 2 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. 3 * Copyright (c) 2007-2021, The Tor Project, Inc. */ 4 /* See LICENSE for licensing information */ 5 6 /** 7 * \file muldiv.h 8 * 9 * \brief Header for muldiv.c 10 **/ 11 12 #ifndef TOR_INTMATH_MULDIV_H 13 #define TOR_INTMATH_MULDIV_H 14 15 #include "lib/cc/torint.h" 16 17 unsigned round_to_next_multiple_of(unsigned number, unsigned divisor); 18 uint32_t round_uint32_to_next_multiple_of(uint32_t number, uint32_t divisor); 19 uint64_t round_uint64_to_next_multiple_of(uint64_t number, uint64_t divisor); 20 21 uint64_t tor_mul_u64_nowrap(uint64_t a, uint64_t b); 22 23 void simplify_fraction64(uint64_t *numer, uint64_t *denom); 24 25 /* Compute the CEIL of <b>a</b> divided by <b>b</b>, for nonnegative <b>a</b> 26 * and positive <b>b</b>. Works on integer types only. Not defined if a+(b-1) 27 * can overflow. */ 28 #define CEIL_DIV(a,b) (((a)+((b)-1))/(b)) 29 30 #endif /* !defined(TOR_INTMATH_MULDIV_H) */