pm::Integer Class Reference

Integral number of unlimited precision. More...

Inherits __mpz_struct.

Public Member Functions
	Integer (const Integer &b)
	Constructors.
	Integer (const mpz_t &b)
	Copy the value from a third party.
	Integer (mpz_t &&b) noexcept
	Integer (double b)
	conversion
	Integer (const Rational &b)
	Integer (const char *s)
	Recognizes automatically number base 10, 8, or 16, as well as singular values "±inf" and "nan".
	Integer (size_t n, Reserve)
	Reserve space for n bits.
	Integer (gmp_randstate_t rnd, unsigned long bits)
	Fill with a prescribed number of random bits.
	Integer (gmp_randstate_t rnd, const Integer &upper)
	Construct a random number between 0 and upper.
Integer &	operator= (const Integer &b)
	Assignment.
Integer &	operator= (long b)
	Assignment with conversion.
Integer &	operator= (unsigned long b)
	these three are for libnormaliz again
Integer &	operator= (double b)
	Assignment with conversion.
Integer &	operator= (const Rational &b)
	Assignment will fail if b is not integral.
Integer &	copy_from (mpz_srcptr src)
	Assign a copy of data obtained from a third party.
Integer &	set (const char *s)
	Recognizes automatically number base 10, 8, or 16, as well as special values "±inf".
bool	fill_from_file (int fd)
void	swap (Integer &b) noexcept
	Efficiently swapping two Integer objects.
	operator double () const
	Cast to simpler types.
Integer &	operator++ ()
	Increment.
Integer &	operator-- ()
	Decrement.
Integer &	negate () noexcept
	In-place negation.
Integer &	operator+= (const Integer &b)
	Addition.
Integer &	operator-= (const Integer &b)
	Subtraction.
Integer &	operator*= (const Integer &b)
	Multiplication.
Integer &	operator/= (const Integer &b)
	Division with rounding via truncation.
Integer &	operator%= (const Integer &b)
	Remainder of division.
Integer &	div_exact (const Integer &b)
	b != infinity; but 0/0 allowed
Integer &	div_exact (long b)
	0/0 allowed
Integer &	operator<<= (long k)
	Multiply by or divide through 2**k, truncate to zero.
Integer &	operator>>= (long k)
	Divide through or multiply by 2**k, truncate to zero.
bool	bit (unsigned long i) const
	Test for bits.
bool	odd () const
	Parity.
bool	even () const
	Parity.
bool	is_zero () const noexcept
	fast comparison with 0
Int	compare (const Integer &b) const
	Comparison. The magnitude of the return value is arbitrary, only its sign is relevant.
void	read (std::istream &is, bool allow_sign=true)
size_t	strsize (std::ios::fmtflags flags) const
	Calculates the size of the buffer needed to store an ASCII representation of an Integer.
void	putstr (std::ios::fmtflags flags, char *buf) const

Static Public Member Functions
static Integer	infinity (Int sgn) noexcept
	Construct an infinite value with a given sign.
static Integer	fac (long k)
	Factorial.
static Integer	fibonacci (unsigned long k)
	Fibonacci numbers.
static pair< Integer, Integer >	fibonacci2 (unsigned long k)
	k-th and (k-1)-th Fibonacci numbers
static Integer	pow (const Integer &a, long k)
	Power.
static Integer	binom (const Integer &n, long k)
	Binomial coefficient.
static Integer	binom (long n, long k)
	Binomial coefficient.

Protected Member Functions
	Integer (std::nullptr_t)
	uninitialized object
void	parse (const char *s)

Detailed Description

Integral number of unlimited precision.

Powered by GMP.

Constructor & Destructor Documentation

Integer() [1/2]

pm::Integer::Integer ( mpz_t &&  b )

inlineexplicitnoexcept

Steal the value from a third party The source must be re-initialized if it's going to be used afterwards

Integer() [2/2]

pm::Integer::Integer ( const Rational &  b )

inlineexplicit

Construct as a copy of the numerator; b must be integral, otherwise GMP::BadCast exception will be raised

Member Function Documentation

fill_from_file()

bool pm::Integer::fill_from_file

(

int

fd

)

Fill with bits coming from an open file. The current allocated size is preserved (see constructor with Reserve() argument).

Return values

true	if filled successfully, false if eof or read error occured.

parse()

void pm::Integer::parse ( const char *  s )

protected

parse the string and assign the value. throws an exception in case of syntax errors

putstr()

void pm::Integer::putstr	(	std::ios::fmtflags	flags,
		char *	buf
	)		const

Produces a printable representation of an Integer.

Parameters

buf	buffer of size not less than the return value of strsize().

read()

void pm::Integer::read	(	std::istream &	is,
		bool	allow_sign = true
	)

Parameters

allow_sign

whether leading whitespaces and sign are expected

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

• lib/core/include/Integer.h
• lib/core/include/Rational.h