muldiv.h File Reference

Header for muldiv.c. More...

#include "lib/cc/torint.h"

Go to the source code of this file.

Macros
#define	CEIL_DIV(a, b)   (((a)+((b)-1))/(b))

Functions
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)

Detailed Description

Header for muldiv.c.

Definition in file muldiv.h.

Macro Definition Documentation

CEIL_DIV

#define CEIL_DIV	(		a,
			b
	)		(((a)+((b)-1))/(b))

Definition at line 28 of file muldiv.h.

Function Documentation

round_to_next_multiple_of()

unsigned round_to_next_multiple_of	(	unsigned	number,
		unsigned	divisor
	)

Return the lowest x such that x is at least number, and x modulo divisor == 0. If no such x can be expressed as an unsigned, return UINT_MAX. Asserts if divisor is zero.

Definition at line 21 of file muldiv.c.

Referenced by geoip_get_client_history(), geoip_get_request_history(), and rate_limit_log().

round_uint32_to_next_multiple_of()

uint32_t round_uint32_to_next_multiple_of	(	uint32_t	number,
		uint32_t	divisor
	)

Return the lowest x such that x is at least number, and x modulo divisor == 0. If no such x can be expressed as a uint32_t, return UINT32_MAX. Asserts if divisor is zero.

Definition at line 35 of file muldiv.c.

Referenced by geoip_format_dirreq_stats(), and rep_hist_format_exit_stats().

round_uint64_to_next_multiple_of()

uint64_t round_uint64_to_next_multiple_of	(	uint64_t	number,
		uint64_t	divisor
	)

Return the lowest x such that x is at least number, and x modulo divisor == 0. If no such x can be expressed as a uint64_t, return UINT64_MAX. Asserts if divisor is zero.

Definition at line 50 of file muldiv.c.

Referenced by geoip_get_transport_history(), rep_hist_format_exit_stats(), and rep_hist_format_hs_stats().

simplify_fraction64()

void simplify_fraction64	(	uint64_t *	numer,
		uint64_t *	denom
	)

Definition at line 89 of file muldiv.c.

tor_mul_u64_nowrap()

uint64_t tor_mul_u64_nowrap	(	uint64_t	a,
		uint64_t	b
	)

Return the unsigned integer product of a and b. If overflow is detected, return UINT64_MAX instead.

Definition at line 75 of file muldiv.c.

Referenced by config_parse_units().