Portable very large unsigned integers. More...

#include <dune/common/bigunsignedint.hh>

Public Member Functions
	bigunsignedint ()
	Construct uninitialized. More...

template<typename Signed >
	bigunsignedint (Signed x, typename std::enable_if< std::is_integral< Signed >::value &&std::is_signed< Signed >::value >::type *=0)
	Construct from signed int. More...

	bigunsignedint (std::uintmax_t x)
	Construct from unsigned int. More...

void	print (std::ostream &s) const
	Print number in hex notation. More...

bigunsignedint< k >	operator+ (const bigunsignedint< k > &x) const
	add More...

bigunsignedint< k > &	operator+= (const bigunsignedint< k > &x)

bigunsignedint< k >	operator- (const bigunsignedint< k > &x) const
	subtract More...

bigunsignedint< k > &	operator-= (const bigunsignedint< k > &x)

bigunsignedint< k >	operator* (const bigunsignedint< k > &x) const
	multiply More...

bigunsignedint< k > &	operator*= (const bigunsignedint< k > &x)

bigunsignedint< k > &	operator++ ()
	prefix increment More...

bigunsignedint< k >	operator/ (const bigunsignedint< k > &x) const

bigunsignedint< k > &	operator/= (const bigunsignedint< k > &x)

bigunsignedint< k >	operator% (const bigunsignedint< k > &x) const

bigunsignedint< k > &	operator%= (const bigunsignedint< k > &x)

bigunsignedint< k >	operator & (const bigunsignedint< k > &x) const
	bitwise and More...

bigunsignedint< k > &	operator &= (const bigunsignedint< k > &x)

bigunsignedint< k >	operator^ (const bigunsignedint< k > &x) const
	bitwise exor More...

bigunsignedint< k > &	operator^= (const bigunsignedint< k > &x)

bigunsignedint< k >	operator\| (const bigunsignedint< k > &x) const
	bitwise or More...

bigunsignedint< k > &	operator\|= (const bigunsignedint< k > &x)

bigunsignedint< k >	operator~ () const
	bitwise complement More...

bigunsignedint< k >	operator<< (int i) const
	left shift More...

bigunsignedint< k >	operator>> (int i) const
	right shift More...

bool	operator< (const bigunsignedint< k > &x) const
	less than More...

bool	operator<= (const bigunsignedint< k > &x) const
	less than or equal More...

bool	operator> (const bigunsignedint< k > &x) const
	greater than More...

bool	operator>= (const bigunsignedint< k > &x) const
	greater or equal More...

bool	operator== (const bigunsignedint< k > &x) const
	equal More...

bool	operator!= (const bigunsignedint< k > &x) const
	not equal More...

std::uint_least32_t	touint () const
	export to other types More...

double	todouble () const
	Convert to a double. More...

Static Public Attributes
static constexpr int	bits = std::numeric_limits<std::uint16_t>::digits

static constexpr int	n = k/bits+(k%bits!=0)

static constexpr int	hexdigits = 4

static constexpr int	bitmask = 0xFFFF

static constexpr int	compbitmask = 0xFFFF0000

static constexpr int	overflowmask = 0x1

Friends
class	bigunsignedint< k/2 >

struct	MPITraits< bigunsignedint< k > >

int	bit_width (const bigunsignedint &arg)
	Bit width. More...

int	countl_zero (const bigunsignedint &arg)
	Count left zero bits. More...

std::size_t	hash_value (const bigunsignedint &arg)

Detailed Description

template<int k>
class Dune::bigunsignedint< k >

Portable very large unsigned integers.

Implements (arbitrarily) large unsigned integers to be used as global ids in some grid managers. Size is a template parameter.

Template Parameters

k	Number of bits of the integer type

Member Function Documentation

◆ operator &()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator& ( const bigunsignedint< k > & x ) const

bitwise and

◆ operator &=()

template<int k>

bigunsignedint<k>& Dune::bigunsignedint< k >::operator&= ( const bigunsignedint< k > & x )

◆ operator%()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator% ( const bigunsignedint< k > & x ) const

modulo

Warning: This function is very slow and its usage should be prevented if possible

◆ operator*()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator* ( const bigunsignedint< k > & x ) const

multiply

◆ operator+()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator+ ( const bigunsignedint< k > & x ) const

add

◆ operator-()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator- ( const bigunsignedint< k > & x ) const

subtract

◆ operator/()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator/ ( const bigunsignedint< k > & x ) const

divide

Warning: This function is very slow and its usage should be prevented if possible

◆ operator^()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator^ ( const bigunsignedint< k > & x ) const

bitwise exor

◆ operator|()

template<int k>

bigunsignedint<k> Dune::bigunsignedint< k >::operator| ( const bigunsignedint< k > & x ) const

bitwise or

Friends And Related Function Documentation

◆ bigunsignedint< k/2 >

template<int k>

friend class bigunsignedint< k/2 >

friend

◆ bit_width

template<int k>

int bit_width ( const bigunsignedint< k > & arg )

friend

Bit width.

If x is not zero, calculates the number of bits needed to store the value arg

◆ countl_zero

template<int k>

int countl_zero ( const bigunsignedint< k > & arg )

friend

Count left zero bits.

The number of consecutive 0 bits in the value of arg, starting from the most significant bit

◆ hash_value

template<int k>

std::size_t hash_value ( const bigunsignedint< k > & arg )

friend

◆ MPITraits< bigunsignedint< k > >

template<int k>

friend struct MPITraits< bigunsignedint< k > >

friend

Member Data Documentation

◆ bitmask

template<int k>

constexpr int Dune::bigunsignedint< k >::bitmask = 0xFFFF

static

◆ bits

template<int k>

constexpr int Dune::bigunsignedint< k >::bits = std::numeric_limits<std::uint16_t>::digits

static

◆ compbitmask

template<int k>

constexpr int Dune::bigunsignedint< k >::compbitmask = 0xFFFF0000

static

◆ hexdigits

template<int k>

constexpr int Dune::bigunsignedint< k >::hexdigits = 4

static

◆ n

template<int k>

constexpr int Dune::bigunsignedint< k >::n = k/bits+(k%bits!=0)

static

◆ overflowmask

template<int k>

constexpr int Dune::bigunsignedint< k >::overflowmask = 0x1

static

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

bigunsignedint.hh

Public Member Functions

Static Public Attributes

Friends

Detailed Description

template<int k> class Dune::bigunsignedint< k >

Member Function Documentation

◆ operator &()

◆ operator &=()

◆ operator%()

◆ operator*()

◆ operator+()

◆ operator-()

◆ operator/()

◆ operator^()

◆ operator|()

Friends And Related Function Documentation

◆ bigunsignedint< k/2 >

◆ bit_width

◆ countl_zero

◆ hash_value

◆ MPITraits< bigunsignedint< k > >

Member Data Documentation

◆ bitmask

◆ bits

◆ compbitmask

◆ hexdigits

◆ n

◆ overflowmask

template<int k>
class Dune::bigunsignedint< k >