AUtils Class Reference

provides some generic functions for non-standard arithmetic operations

#include <AUtils.h>

List of all members.

Static Public Member Functions
template<class T >
static T	max (T a, T b)
template<class T >
static T	min (T a, T b)
template<class T >
static T	div_roundup (T a, T b)
template<class T >
static T	bminus (T a, T b)
template<class T , T top>
static T	bplus (T a, T b)
template<class T >
static T	bplus (T a, T b, T top)
template<class T , class CTYPE >
static T	modsum (T *s, CTYPE n, T m)
template<class IT , class FT >
static IT	roundup (FT x)
template<class T >
static T	log2_ceil (T n)

---

Member Function Documentation

template<class T >

T AUtils::bminus	(	T	a,
		T	b
	)			[inline, static]

substraction with the modification to return 0 (T()) for negative difference (needs >, -, T())

template<class T >

T AUtils::bplus	(	T	a,
		T	b,
		T	top
	)			[inline, static]

template<class T , T top>

T AUtils::bplus	(	T	a,
		T	b
	)			[inline, static]

addition with the modification to return top for sums that are larger than top

template<class T >

T AUtils::div_roundup	(	T	a,
		T	b
	)			[inline, static]

returns a divided through b rounded up to nearest "integer" (needs =, --, +, /)

template<class T >

T AUtils::log2_ceil

(

T

n

)

[inline, static]

compute 2-logarithm of n (rounded up to nearest int), i.e. number of bits needed to store values from {0,...,n-1}

template<class T >

T AUtils::max	(	T	a,
		T	b
	)			[inline, static]

return the maximum of a and b (needs >)

template<class T >

T AUtils::min	(	T	a,
		T	b
	)			[inline, static]

return the minimum of a and b (needs <)

template<class T , class CTYPE >

T AUtils::modsum	(	T *	s,
		CTYPE	n,
		T	m
	)			[inline, static]

calculate the sum s[0]+...s[n-1] modulo m (needs =, +, % for T and =, CTYPE(), <, ++ for CTYPE)

template<class IT , class FT >

IT AUtils::roundup

(

FT

x

)

[inline, static]

round up x to nearest integer

---

The documentation for this class was generated from the following file:

• AUtils.h