Represents an encrypted fixed-point number. More...

#include <Efixedpoint.h>

Inheritance diagram for computefhe::Efixedpoint:

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Collaboration diagram for computefhe::Efixedpoint:

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Public Member Functions
	Efixedpoint ()
	Default constructor. Initializes a "zero" encrypted fixed-point value.

	Efixedpoint (size_t n_digits, size_t n_frac, bool is_signed)
	Constructs a "zero" Efixedpoint with specific bitsize.

	Efixedpoint (double d, size_t n_digits, size_t n_frac, bool is_signed)
	Constructs and encrypts a plaintext double.

	Efixedpoint (const FixedPoint &fp, size_t n_frac, bool is_signed)
	Wraps an existing FixedPoint bit-vector as a fixed-point number.

	Efixedpoint (const Efixedpoint &other)
	Copy constructor.

	Efixedpoint (const Einteger &other)
	Conversion constructor from an Einteger. The resulting fixed-point number will have a fractional part of 0 bits.

size_t	getFracSize () const
	Gets the number of bits used for the fractional part.

void	setFracSize (size_t)
	Manually adjusts the fractional size metadata.

virtual const Einteger	operator== (const Efixedpoint &) const
	Encrypted equality comparison (ciphertext-ciphertext).

virtual const Einteger	operator!= (const Efixedpoint &) const
	Encrypted inequality comparison (ciphertext-ciphertext).

virtual const Einteger	operator> (const Efixedpoint &) const
	Encrypted greater-than comparison (ciphertext-ciphertext).

virtual const Einteger	operator>= (const Efixedpoint &) const
	Encrypted greater-than-or-equal comparison (ciphertext-ciphertext).

virtual const Einteger	operator< (const Efixedpoint &) const
	Encrypted less-than comparison (ciphertext-ciphertext).

virtual const Einteger	operator<= (const Efixedpoint &) const
	Encrypted less-than-or-equal comparison (ciphertext-ciphertext).

virtual const Einteger	operator== (double) const
	Encrypted equality comparison with plaintext double.

virtual const Einteger	operator!= (double) const
	Encrypted inequality comparison with plaintext double.

virtual const Einteger	operator> (double) const
	Encrypted greater-than comparison with plaintext double.

virtual const Einteger	operator>= (double) const
	Encrypted greater-than-or-equal comparison with plaintext double.

virtual const Einteger	operator< (double) const
	Encrypted less-than comparison with plaintext double.

virtual const Einteger	operator<= (double) const
	Encrypted less-than-or-equal comparison with plaintext double.

virtual const Efixedpoint	operator+ (const Efixedpoint &) const
	Encrypted addition (ciphertext-ciphertext).

virtual const Efixedpoint	operator+= (const Efixedpoint &)
	Encrypted addition assignment (ciphertext-ciphertext).

virtual const Efixedpoint	operator- (const Efixedpoint &) const
	Encrypted subtraction (ciphertext-ciphertext).

virtual const Efixedpoint	operator-= (const Efixedpoint &)
	Encrypted subtraction assignment (ciphertext-ciphertext).

virtual const Efixedpoint	operator* (const Efixedpoint &) const
	Encrypted multiplication (ciphertext-ciphertext). Resulting frac_size is sum of inputs.

virtual const Efixedpoint	*operator=** (const Efixedpoint &)
	Encrypted multiplication assignment (ciphertext-ciphertext).

virtual const Efixedpoint	operator/ (const Efixedpoint &) const
	Encrypted division (ciphertext-ciphertext).

virtual const Efixedpoint	operator/= (const Efixedpoint &)
	Encrypted division assignment (ciphertext-ciphertext).

virtual const Efixedpoint	operator+ (double) const
	Encrypted addition with plaintext double.

virtual const Efixedpoint	operator+= (double)
	Encrypted addition assignment with plaintext double.

virtual const Efixedpoint	operator- (double) const
	Encrypted subtraction with plaintext double.

virtual const Efixedpoint	operator-= (double)
	Encrypted subtraction assignment with plaintext double.

virtual const Efixedpoint	operator* (double) const
	Encrypted multiplication with plaintext double.

virtual const Efixedpoint	*operator=** (double)
	Encrypted multiplication assignment with plaintext double.

virtual const Efixedpoint	operator/ (double) const
	Encrypted division with plaintext double.

virtual const Efixedpoint	operator/= (double)
	Encrypted division assignment with plaintext double.

const Efixedpoint	operator- () const
	Encrypted unary negation.

const Efixedpoint	operator++ ()
	Pre-increment.

const Efixedpoint	operator++ (int)
	Post-increment.

const Efixedpoint	operator-- ()
	Pre-decrement.

const Efixedpoint	operator-- (int)
	Post-decrement.

const Efixedpoint	operator<< (int) const
	Bitwise left shift.

const Efixedpoint	operator<<= (int)
	Bitwise left shift assignment.

const Efixedpoint	operator>> (int) const
	Bitwise right shift.

const Efixedpoint	operator>>= (int)
	Bitwise right shift assignment.

Efixedpoint &	operator= (const Efixedpoint &)
	Assignment from another Efixedpoint.

Efixedpoint &	operator= (double)
	Assignment from a plaintext double (encrypts the value).

virtual	operator double () const
	Explicit conversion to a decrypted double.

Einteger	toInteger () const
	Converts fixed-point to integer by truncating the fractional part.

virtual const Einteger	operator== (const Einteger &) const
	Encrypted equality comparison with another Einteger.

virtual const Einteger	operator== (uint64_t) const
	Encrypted equality comparison with a plaintext `uint64_t`.

virtual const Einteger	operator!= (const Einteger &) const
	Encrypted inequality comparison with another Einteger.

virtual const Einteger	operator!= (uint64_t) const
	Encrypted inequality comparison with a plaintext `uint64_t`.

virtual const Einteger	operator> (const Einteger &) const
	Encrypted greater-than comparison with another Einteger.

virtual const Einteger	operator> (uint64_t) const
	Encrypted greater-than comparison with a plaintext `uint64_t`.

virtual const Einteger	operator>= (const Einteger &) const
	Encrypted greater-than-or-equal comparison with another Einteger.

virtual const Einteger	operator>= (uint64_t) const
	Encrypted greater-than-or-equal comparison with a plaintext `uint64_t`.

virtual const Einteger	operator< (const Einteger &) const
	Encrypted less-than comparison with another Einteger.

virtual const Einteger	operator< (uint64_t) const
	Encrypted less-than comparison with a plaintext `uint64_t`.

virtual const Einteger	operator<= (const Einteger &) const
	Encrypted less-than-or-equal comparison with another Einteger.

virtual const Einteger	operator<= (uint64_t) const
	Encrypted less-than-or-equal comparison with a plaintext `uint64_t`.

virtual const Einteger	operator+ (const Einteger &) const
	Encrypted addition with another Einteger.

virtual const Einteger	operator+ (uint64_t) const
	Encrypted addition with a plaintext `uint64_t`.

virtual const Einteger	operator+= (const Einteger &)
	Encrypted addition assignment with another Einteger.

virtual const Einteger	operator+= (uint64_t)
	Encrypted addition assignment with a plaintext `uint64_t`.

virtual const Einteger	operator- (const Einteger &) const
	Encrypted subtraction with another Einteger.

virtual const Einteger	operator- (uint64_t) const
	Encrypted subtraction with a plaintext `uint64_t`.

const Einteger	operator- () const
	Encrypted unary negation (two's complement).

virtual const Einteger	operator-= (const Einteger &)
	Encrypted subtraction assignment with another Einteger.

virtual const Einteger	operator-= (uint64_t)
	Encrypted subtraction assignment with a plaintext `uint64_t`.

virtual const Einteger	operator* (const Einteger &) const
	Encrypted multiplication with another Einteger.

virtual const Einteger	operator* (uint64_t) const
	Encrypted multiplication with a plaintext `uint64_t`.

virtual const Einteger	operator*= (const Einteger &)
	Encrypted multiplication assignment with another Einteger.

virtual const Einteger	operator*= (uint64_t)
	Encrypted multiplication assignment with a plaintext `uint64_t`.

virtual const Einteger	operator/ (const Einteger &) const
	Encrypted division with another Einteger.

virtual const Einteger	operator/ (uint64_t) const
	Encrypted division with a plaintext `uint64_t`.

virtual const Einteger	operator/= (const Einteger &)
	Encrypted division assignment with another Einteger.

virtual const Einteger	operator/= (uint64_t)
	Encrypted division assignment with a plaintext `uint64_t`.

Public Member Functions inherited from computefhe::Einteger
	Einteger ()
	Default constructor. Initializes an empty or zero-valued encrypted integer.

	Einteger (int64_t d)
	Constructs an Einteger from a plaintext `int64_t`.

	Einteger (size_t n_digits, bool is_signed)
	Constructs an Einteger with a specified number of bits and signedness.

	Einteger (int64_t d, size_t n_digits)
	Constructs an Einteger from a plaintext `int64_t` with a specified number of bits.

	Einteger (uint64_t d, size_t n_digits)
	Constructs an Einteger from a plaintext `uint64_t` with a specified number of bits.

	Einteger (const FixedPoint &fp, bool is_signed)
	Constructs an Einteger from an existing `FixedPoint` object.

	Einteger (const Einteger &other)
	Copy constructor.

virtual	~Einteger ()
	Destructor.

const FixedPoint &	getData () const
	Gets the underlying `FixedPoint` data.

size_t	getSize () const
	Gets the number of bits used to represent the encrypted integer.

bool	isSigned () const
	Checks if the encrypted integer is signed.

virtual const Einteger	operator% (const Einteger &) const
	Encrypted modulo with another Einteger.

virtual const Einteger	operator%= (const Einteger &)
	Encrypted modulo assignment with another Einteger.

virtual const Einteger	operator% (uint64_t) const
	Encrypted modulo with a plaintext `uint64_t`.

virtual const Einteger	operator%= (uint64_t)
	Encrypted modulo assignment with a plaintext `uint64_t`.

const Einteger	operator- () const
	Encrypted unary negation (two's complement).

virtual const Einteger	operator& (const Einteger &) const
	Encrypted bitwise AND with another Einteger.

virtual const Einteger	operator&= (const Einteger &)
	Encrypted bitwise AND assignment with another Einteger.

virtual const Einteger	operator\| (const Einteger &) const
	Encrypted bitwise OR with another Einteger.

virtual const Einteger	operator\|= (const Einteger &)
	Encrypted bitwise OR assignment with another Einteger.

virtual const Einteger	operator^ (const Einteger &) const
	Encrypted bitwise XOR with another Einteger.

virtual const Einteger	operator^= (const Einteger &)
	Encrypted bitwise XOR assignment with another Einteger.

virtual const Einteger	operator& (uint64_t) const
	Encrypted bitwise AND with a plaintext `uint64_t`.

virtual const Einteger	operator&= (uint64_t)
	Encrypted bitwise AND assignment with a plaintext `uint64_t`.

virtual const Einteger	operator\| (uint64_t) const
	Encrypted bitwise OR with a plaintext `uint64_t`.

virtual const Einteger	operator\|= (uint64_t)
	Encrypted bitwise OR assignment with a plaintext `uint64_t`.

virtual const Einteger	operator^ (uint64_t) const
	Encrypted bitwise XOR with a plaintext `uint64_t`.

virtual const Einteger	operator^= (uint64_t)
	Encrypted bitwise XOR assignment with a plaintext `uint64_t`.

virtual const Einteger	operator! () const
	Encrypted logical NOT.

virtual const Einteger	operator~ () const
	Encrypted bitwise NOT (one's complement).

virtual const Einteger	operator&& (const Einteger &) const
	Encrypted logical AND with another Einteger.

virtual const Einteger	operator&& (uint64_t) const
	Encrypted logical AND with a plaintext `uint64_t`.

virtual const Einteger	operator\|\| (const Einteger &) const
	Encrypted logical OR with another Einteger.

virtual const Einteger	operator\|\| (uint64_t) const
	Encrypted logical OR with a plaintext `uint64_t`.

const Einteger	operator++ ()
	Pre-increment operator. Increments the encrypted integer by one.

const Einteger	operator++ (int)
	Post-increment operator. Increments the encrypted integer by one.

const Einteger	operator-- ()
	Pre-decrement operator. Decrements the encrypted integer by one.

const Einteger	operator-- (int)
	Post-decrement operator. Decrements the encrypted integer by one.

const Einteger	operator<< (int) const
	Encrypted left shift.

const Einteger	operator<<= (int)
	Encrypted left shift assignment.

const Einteger	operator>> (int) const
	Encrypted right shift.

const Einteger	operator>>= (int)
	Encrypted right shift assignment.

Einteger &	operator= (const Einteger &)
	Assignment operator from another Einteger.

Einteger &	operator= (uint64_t)
	Assignment operator from a plaintext `uint64_t`.

virtual	operator bool () const
	Explicit conversion to decrypted boolean.

virtual	operator int8_t () const
	Explicit conversion to decrypted `int8_t`.

virtual	operator uint8_t () const
	Explicit conversion to decrypted `uint8_t`.

virtual	operator int16_t () const
	Explicit conversion to decrypted `int16_t`.

virtual	operator uint16_t () const
	Explicit conversion to decrypted `uint16_t`.

virtual	operator int32_t () const
	Explicit conversion to decrypted `int32_t`.

virtual	operator uint32_t () const
	Explicit conversion to decrypted `uint32_t`.

virtual	operator int64_t () const
	Explicit conversion to decrypted `int64_t`.

virtual	operator uint64_t () const
	Explicit conversion to decrypted `uint64_t`.

template<class Archive >
void	save (Archive &ar, std::uint32_t const version) const

template<class Archive >
void	load (Archive &ar, std::uint32_t const version)

std::string	SerializedObjectName () const override

Static Protected Member Functions
static FixedPoint	double2fp (double d, size_t n_digits, size_t n_frac)

static void	promote (const Efixedpoint &a, const Efixedpoint &b, FixedPoint &a_out, FixedPoint &b_out, size_t &n_digits_out, size_t &n_frac_out, bool &sign_out)

static FixedPoint	promote (const Efixedpoint &a, size_t n_digits, size_t n_frac)

Static Protected Member Functions inherited from computefhe::Einteger
static int64_t	sign_extend (uint64_t d, size_t n_digits)

static bool	promote (const Einteger &a, const Einteger &b, FixedPoint &a_out, FixedPoint &b_out)

Protected Attributes
size_t	frac_size

Protected Attributes inherited from computefhe::Einteger
FixedPoint	data

size_t	size

bool	sign

Friends
ostream &	operator<< (ostream &out, const Efixedpoint &obj)
	Decrypts and outputs the fixed-point value to a stream.

const Einteger	operator== (double a, const Efixedpoint &b)
	Plaintext-ciphertext equality comparison.

const Einteger	operator!= (double a, const Efixedpoint &b)
	Plaintext-ciphertext inequality comparison.

const Einteger	operator> (double a, const Efixedpoint &b)
	Plaintext-ciphertext greater-than comparison.

const Einteger	operator>= (double a, const Efixedpoint &b)
	Plaintext-ciphertext greater-than-or-equal comparison.

const Einteger	operator< (double a, const Efixedpoint &b)
	Plaintext-ciphertext less-than comparison.

const Einteger	operator<= (double a, const Efixedpoint &b)
	Plaintext-ciphertext less-than-or-equal comparison.

const Efixedpoint	operator+ (double a, const Efixedpoint &b)
	Plaintext-ciphertext addition.

const Efixedpoint	operator- (double a, const Efixedpoint &b)
	Plaintext-ciphertext subtraction.

const Efixedpoint	operator* (double a, const Efixedpoint &b)
	Plaintext-ciphertext multiplication.

const Efixedpoint	operator/ (double a, const Efixedpoint &b)
	Plaintext-ciphertext division.

const Einteger	operator== (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` equality comparison with Einteger.

const Einteger	operator!= (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` inequality comparison with Einteger.

const Einteger	operator> (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` greater-than comparison with Einteger.

const Einteger	operator>= (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` greater-than-or-equal comparison with Einteger.

const Einteger	operator< (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` less-than comparison with Einteger.

const Einteger	operator<= (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` less-than-or-equal comparison with Einteger.

const Einteger	operator+ (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` addition with Einteger.

const Einteger	operator- (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` subtraction with Einteger.

const Einteger	operator* (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` multiplication with Einteger.

const Einteger	operator/ (uint64_t a, const Einteger &b)
	Friend operator for plaintext `uint64_t` division with Einteger.

Additional Inherited Members
Static Public Member Functions inherited from computefhe::Einteger
static FixedPoint	promote (const Einteger &a, size_t s)
	Promotes or truncates an Einteger to a specific bit size.

static uint32_t	SerializedVersion ()

Protected Member Functions inherited from computefhe::Einteger
void	_sync_var ()

void	_desync_var ()

Static Protected Attributes inherited from computefhe::Einteger
static FixedPoint	cached_divident

static FixedPoint	cached_divisor

static FixedPoint	cached_quotient

static FixedPoint	cached_remainder

Detailed Description

Represents an encrypted fixed-point number.

Inherits from Einteger and uses a scaling factor (2^frac_size) to represent fractional values. This class allows for high-level arithmetic and comparison on encrypted real numbers, supporting both signed and unsigned logic.

Constructor & Destructor Documentation

◆ Efixedpoint() [1/3]

computefhe::Efixedpoint::Efixedpoint	(	size_t	n_digits,
		size_t	n_frac,
		bool	is_signed
	)

Constructs a "zero" Efixedpoint with specific bitsize.

Parameters

n_digits	Total number of bits (integer + fractional).
n_frac	Number of bits reserved for the fractional part.
is_signed	Whether to treat the value as a signed two's complement number.

◆ Efixedpoint() [2/3]

computefhe::Efixedpoint::Efixedpoint	(	double	d,
		size_t	n_digits,
		size_t	n_frac,
		bool	is_signed
	)

Constructs and encrypts a plaintext double.

Parameters

d	The plaintext value to encrypt.
n_digits	Total bit width.
n_frac	Fractional bit width.
is_signed	Signedness of the encrypted representation.

◆ Efixedpoint() [3/3]

computefhe::Efixedpoint::Efixedpoint	(	const FixedPoint &	fp,
		size_t	n_frac,
		bool	is_signed
	)

Wraps an existing FixedPoint bit-vector as a fixed-point number.

Parameters

fp	The underlying encrypted bit-vector.
n_frac	Fractional bit width.
is_signed	Signedness.

Member Function Documentation

◆ getFracSize()

size_t computefhe::Efixedpoint::getFracSize ( ) const

Gets the number of bits used for the fractional part.

Returns: fractional bit count.

◆ operator double()

virtual computefhe::Efixedpoint::operator double ( ) const

explicitvirtual

Explicit conversion to a decrypted double.

Reimplemented from computefhe::Einteger.

◆ operator!=() [1/2]

virtual const Einteger computefhe::Einteger::operator!= ( const Einteger & ) const

virtual

Encrypted inequality comparison with another Einteger.

Parameters

other The other encrypted integer.

Returns: An Einteger representing the encrypted boolean result (1 if not equal, 0 if equal).

Reimplemented from computefhe::Einteger.

◆ operator!=() [2/2]

virtual const Einteger computefhe::Einteger::operator!= ( uint64_t ) const

virtual

Encrypted inequality comparison with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: An Einteger representing the encrypted boolean result.

Reimplemented from computefhe::Einteger.

◆ operator*() [1/2]

virtual const Einteger computefhe::Einteger::operator* ( const Einteger & ) const

virtual

Encrypted multiplication with another Einteger.

Parameters

other The other encrypted integer.

Returns: A new Einteger representing the product.

Reimplemented from computefhe::Einteger.

◆ operator*() [2/2]

virtual const Einteger computefhe::Einteger::operator* ( uint64_t ) const

virtual

Encrypted multiplication with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: A new Einteger representing the product.

Reimplemented from computefhe::Einteger.

◆ operator*=() [1/2]

virtual const Einteger computefhe::Einteger::operator*= ( const Einteger & )

virtual

Encrypted multiplication assignment with another Einteger.

Parameters

other The other encrypted integer.

Returns: A reference to this Einteger after multiplication.

Reimplemented from computefhe::Einteger.

◆ operator*=() [2/2]

virtual const Einteger computefhe::Einteger::operator*= ( uint64_t )

virtual

Encrypted multiplication assignment with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: A reference to this Einteger after multiplication.

Reimplemented from computefhe::Einteger.

◆ operator+() [1/2]

virtual const Einteger computefhe::Einteger::operator+ ( const Einteger & ) const

virtual

Encrypted addition with another Einteger.

Parameters

other The other encrypted integer.

Returns: A new Einteger representing the sum.

Reimplemented from computefhe::Einteger.

◆ operator+() [2/2]

virtual const Einteger computefhe::Einteger::operator+ ( uint64_t ) const

virtual

Encrypted addition with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: A new Einteger representing the sum.

Reimplemented from computefhe::Einteger.

◆ operator+=() [1/2]

virtual const Einteger computefhe::Einteger::operator+= ( const Einteger & )

virtual

Encrypted addition assignment with another Einteger.

Parameters

other The other encrypted integer.

Returns: A reference to this Einteger after addition.

Reimplemented from computefhe::Einteger.

◆ operator+=() [2/2]

virtual const Einteger computefhe::Einteger::operator+= ( uint64_t )

virtual

Encrypted addition assignment with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: A reference to this Einteger after addition.

Reimplemented from computefhe::Einteger.

◆ operator-() [1/3]

const Einteger computefhe::Einteger::operator- ( ) const

Encrypted unary negation (two's complement).

Returns: A new Einteger representing the negated value.

◆ operator-() [2/3]

virtual const Einteger computefhe::Einteger::operator- ( const Einteger & ) const

virtual

Encrypted subtraction with another Einteger.

Parameters

other The other encrypted integer.

Returns: A new Einteger representing the difference.

Reimplemented from computefhe::Einteger.

◆ operator-() [3/3]

virtual const Einteger computefhe::Einteger::operator- ( uint64_t ) const

virtual

Encrypted subtraction with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: A new Einteger representing the difference.

Reimplemented from computefhe::Einteger.

◆ operator-=() [1/2]

virtual const Einteger computefhe::Einteger::operator-= ( const Einteger & )

virtual

Encrypted subtraction assignment with another Einteger.

Parameters

other The other encrypted integer.

Returns: A reference to this Einteger after subtraction.

Reimplemented from computefhe::Einteger.

◆ operator-=() [2/2]

virtual const Einteger computefhe::Einteger::operator-= ( uint64_t )

virtual

Encrypted subtraction assignment with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: A reference to this Einteger after subtraction.

Reimplemented from computefhe::Einteger.

◆ operator/() [1/2]

virtual const Einteger computefhe::Einteger::operator/ ( const Einteger & ) const

virtual

Encrypted division with another Einteger.

Parameters

other The other encrypted integer (divisor).

Returns: A new Einteger representing the quotient.

Reimplemented from computefhe::Einteger.

◆ operator/() [2/2]

virtual const Einteger computefhe::Einteger::operator/ ( uint64_t ) const

virtual

Encrypted division with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer (divisor).

Returns: A new Einteger representing the quotient.

Reimplemented from computefhe::Einteger.

◆ operator/=() [1/2]

virtual const Einteger computefhe::Einteger::operator/= ( const Einteger & )

virtual

Encrypted division assignment with another Einteger.

Parameters

other The other encrypted integer (divisor).

Returns: A reference to this Einteger after division.

Reimplemented from computefhe::Einteger.

◆ operator/=() [2/2]

virtual const Einteger computefhe::Einteger::operator/= ( uint64_t )

virtual

Encrypted division assignment with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer (divisor).

Returns: A reference to this Einteger after division.

Reimplemented from computefhe::Einteger.

◆ operator<() [1/2]

virtual const Einteger computefhe::Einteger::operator< ( const Einteger & ) const

virtual

Encrypted less-than comparison with another Einteger.

Parameters

other The other encrypted integer.

Returns: An Einteger representing the encrypted boolean result (1 if less, 0 otherwise).

Reimplemented from computefhe::Einteger.

◆ operator<() [2/2]

virtual const Einteger computefhe::Einteger::operator< ( uint64_t ) const

virtual

Encrypted less-than comparison with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: An Einteger representing the encrypted boolean result.

Reimplemented from computefhe::Einteger.

◆ operator<=() [1/2]

virtual const Einteger computefhe::Einteger::operator<= ( const Einteger & ) const

virtual

Encrypted less-than-or-equal comparison with another Einteger.

Parameters

other The other encrypted integer.

Returns: An Einteger representing the encrypted boolean result (1 if less or equal, 0 otherwise).

Reimplemented from computefhe::Einteger.

◆ operator<=() [2/2]

virtual const Einteger computefhe::Einteger::operator<= ( uint64_t ) const

virtual

Encrypted less-than-or-equal comparison with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: An Einteger representing the encrypted boolean result.

Reimplemented from computefhe::Einteger.

◆ operator==() [1/2]

virtual const Einteger computefhe::Einteger::operator== ( const Einteger & ) const

virtual

Encrypted equality comparison with another Einteger.

Parameters

other The other encrypted integer.

Returns: An Einteger representing the encrypted boolean result (1 if equal, 0 if not).

Reimplemented from computefhe::Einteger.

◆ operator==() [2/2]

virtual const Einteger computefhe::Einteger::operator== ( uint64_t ) const

virtual

Encrypted equality comparison with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: An Einteger representing the encrypted boolean result.

Reimplemented from computefhe::Einteger.

◆ operator>() [1/2]

virtual const Einteger computefhe::Einteger::operator> ( const Einteger & ) const

virtual

Encrypted greater-than comparison with another Einteger.

Parameters

other The other encrypted integer.

Returns: An Einteger representing the encrypted boolean result (1 if greater, 0 otherwise).

Reimplemented from computefhe::Einteger.

◆ operator>() [2/2]

virtual const Einteger computefhe::Einteger::operator> ( uint64_t ) const

virtual

Encrypted greater-than comparison with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: An Einteger representing the encrypted boolean result.

Reimplemented from computefhe::Einteger.

◆ operator>=() [1/2]

virtual const Einteger computefhe::Einteger::operator>= ( const Einteger & ) const

virtual

Encrypted greater-than-or-equal comparison with another Einteger.

Parameters

other The other encrypted integer.

Returns: An Einteger representing the encrypted boolean result (1 if greater or equal, 0 otherwise).

Reimplemented from computefhe::Einteger.

◆ operator>=() [2/2]

virtual const Einteger computefhe::Einteger::operator>= ( uint64_t ) const

virtual

Encrypted greater-than-or-equal comparison with a plaintext uint64_t.

Parameters

val	The plaintext unsigned integer.

Returns: An Einteger representing the encrypted boolean result.

Reimplemented from computefhe::Einteger.

◆ setFracSize()

void computefhe::Efixedpoint::setFracSize ( size_t )

Manually adjusts the fractional size metadata.

Note: This does not perform bit-shifting; use operator<< or operator>> for scaling.

Parameters

n	New fractional bit count.

Friends And Related Symbol Documentation

◆ operator!= [1/2]

const Einteger operator!=	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext inequality comparison.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: An Einteger representing the encrypted boolean result (1 if not equal).

◆ operator!= [2/2]

const Einteger operator!=	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t inequality comparison with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: An Einteger representing the encrypted boolean result.

◆ operator* [1/2]

const Efixedpoint operator*	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext multiplication.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: A new Efixedpoint representing the encrypted product (a * b).

◆ operator* [2/2]

const Einteger operator*	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t multiplication with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: A new Einteger representing the product.

◆ operator+ [1/2]

const Efixedpoint operator+	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext addition.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: A new Efixedpoint representing the encrypted sum (a + b).

◆ operator+ [2/2]

const Einteger operator+	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t addition with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: A new Einteger representing the sum.

◆ operator- [1/2]

const Efixedpoint operator-	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext subtraction.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: A new Efixedpoint representing the encrypted difference (a - b).

◆ operator- [2/2]

const Einteger operator-	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t subtraction with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: A new Einteger representing the difference.

◆ operator/ [1/2]

const Efixedpoint operator/	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext division.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value (divisor).

Returns: A new Efixedpoint representing the encrypted quotient (a / b).

◆ operator/ [2/2]

const Einteger operator/	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t division with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: A new Einteger representing the quotient.

◆ operator< [1/2]

const Einteger operator<	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext less-than comparison.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: An Einteger representing the encrypted boolean result (1 if a < b).

◆ operator< [2/2]

const Einteger operator<	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t less-than comparison with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: An Einteger representing the encrypted boolean result.

◆ operator<<

ostream & operator<<	(	ostream &	out,
		const Efixedpoint &	obj
	)

friend

Decrypts and outputs the fixed-point value to a stream.

Parameters

out	The output stream.
obj	The Efixedpoint object to decrypt and print.

Returns: A reference to the output stream.

◆ operator<= [1/2]

const Einteger operator<=	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext less-than-or-equal comparison.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: An Einteger representing the encrypted boolean result (1 if a <= b).

◆ operator<= [2/2]

const Einteger operator<=	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t less-than-or-equal comparison with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: An Einteger representing the encrypted boolean result.

◆ operator== [1/2]

const Einteger operator==	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext equality comparison.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: An Einteger representing the encrypted boolean result (1 if equal).

◆ operator== [2/2]

const Einteger operator==	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t equality comparison with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: An Einteger representing the encrypted boolean result.

◆ operator> [1/2]

const Einteger operator>	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext greater-than comparison.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: An Einteger representing the encrypted boolean result (1 if a

‍b).

◆ operator> [2/2]

const Einteger operator>	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t greater-than comparison with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: An Einteger representing the encrypted boolean result.

◆ operator>= [1/2]

const Einteger operator>=	(	double	a,
		const Efixedpoint &	b
	)

friend

Plaintext-ciphertext greater-than-or-equal comparison.

Parameters

a	The plaintext double value.
b	The encrypted fixed-point value.

Returns: An Einteger representing the encrypted boolean result (1 if a >= b).

◆ operator>= [2/2]

const Einteger operator>=	(	uint64_t	a,
		const Einteger &	b
	)

friend

Friend operator for plaintext uint64_t greater-than-or-equal comparison with Einteger.

Parameters

a	The plaintext unsigned integer.
b	The encrypted integer.

Returns: An Einteger representing the encrypted boolean result.

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

src/include/computefhe/Efixedpoint.h

Public Member Functions

Static Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Efixedpoint() [1/3]

◆ Efixedpoint() [2/3]

◆ Efixedpoint() [3/3]

Member Function Documentation

◆ getFracSize()

◆ operator double()

◆ operator!=() [1/2]

◆ operator!=() [2/2]

◆ operator*() [1/2]

◆ operator*() [2/2]

◆ operator*=() [1/2]

◆ operator*=() [2/2]

◆ operator+() [1/2]

◆ operator+() [2/2]

◆ operator+=() [1/2]

◆ operator+=() [2/2]

◆ operator-() [1/3]

◆ operator-() [2/3]

◆ operator-() [3/3]

◆ operator-=() [1/2]

◆ operator-=() [2/2]

◆ operator/() [1/2]

◆ operator/() [2/2]

◆ operator/=() [1/2]

◆ operator/=() [2/2]

◆ operator<() [1/2]

◆ operator<() [2/2]

◆ operator<=() [1/2]

◆ operator<=() [2/2]

◆ operator==() [1/2]

◆ operator==() [2/2]

◆ operator>() [1/2]

◆ operator>() [2/2]

◆ operator>=() [1/2]

◆ operator>=() [2/2]

◆ setFracSize()

Friends And Related Symbol Documentation

◆ operator!= [1/2]

◆ operator!= [2/2]

◆ operator* [1/2]

◆ operator* [2/2]

◆ operator+ [1/2]

◆ operator+ [2/2]

◆ operator- [1/2]

◆ operator- [2/2]

◆ operator/ [1/2]

◆ operator/ [2/2]

◆ operator< [1/2]

◆ operator< [2/2]

◆ operator<<

◆ operator<= [1/2]

◆ operator<= [2/2]

◆ operator== [1/2]

◆ operator== [2/2]

◆ operator> [1/2]

◆ operator> [2/2]

◆ operator>= [1/2]

◆ operator>= [2/2]