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  3. TBigInt

TBigInt

N-bit integer.

API > API/Runtime > API/Runtime/Core

N-bit integer.

   
Name TBigInt
Type class
Header File /Engine/Source/Runtime/Core/Public/Math/BigInt.h
Include Path #include "Math/BigInt.h"

Syntax

template<int32 NumBits, bool bSigned>  
class TBigInt

Constructors

Name Remarks Include Path Unreal Specifiers

TBigInt ( const FString& Value
)

 Constructor. Initializes this big int with a string representing a hex value. Math/BigInt.h  

TBigInt ()

 Default constructor. Initializes the number to zero. Math/BigInt.h  

TBigInt ( int64 Other
)

 Constructor. Initializes this big int with a 64 bit integer value. Math/BigInt.h  

TBigInt ( const uint32* InBits
)

 Constructor. Initializes this big int with an array of words. Math/BigInt.h  

TBigInt ( const uint8* InData,
uint32 InNumBytes
)

 Constructor. Initializes this big int with an array of bytes. Math/BigInt.h  

Typedefs

Name Type Remarks Include Path
BigInt TBigInt< NumBits, bSigned >   Math/BigInt.h

Constants

Name Type Remarks Include Path
One BigInt   Math/BigInt.h

Variables

Protected

Name Type Remarks Include Path Unreal Specifiers
Bits uint32 All bits stored as an array of words. Math/BigInt.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

void Add ( const BigInt& Other
)

 Adds two integers. Math/BigInt.h  

void BitwiseAnd ( const BigInt& Other
)

 Bitwise 'and' Math/BigInt.h  

void BitwiseNot()

 Bitwise 'not' Math/BigInt.h  

void BitwiseOr ( const BigInt& Other
)

 Bitwise 'or' Math/BigInt.h  

void Divide ( const BigInt& Divisor
)

 Divides two integers. Math/BigInt.h  

void DivideWithRemainder ( const BigInt& Divisor,
BigInt& Remainder
)

 Divides two integers with remainder. Math/BigInt.h  

int32 GetBit ( int32 BitIndex
) const

 Returns a bit value as an integer value (0 or 1). Math/BigInt.h  

const uint32 * GetBits ()

   Math/BigInt.h  

uint32 * GetBits ()

   Math/BigInt.h  

int32 GetHighestNonZeroBit()

 Returns the index of the highest non-zero bit. -1 if no such bit exists. Math/BigInt.h  

int32 GetHighestNonZeroWord()

 Returns the index of the highest word that is not zero. -1 if no such word exists. Math/BigInt.h  

bool IsEqual ( const BigInt& Other
) const

 Checks if two integers are equal. Math/BigInt.h  

bool IsFirstBitSet()

   Math/BigInt.h  

bool IsGreater ( const BigInt& Other
) const

 This > Other Math/BigInt.h  

bool IsGreaterOrEqual ( const BigInt& Other
) const

 This >= Other Math/BigInt.h  

bool IsGreaterThanZero()

 This > 0 Math/BigInt.h  

bool IsLess ( const BigInt& Other
) const

 This < Other Math/BigInt.h  

bool IsLessOrEqual ( const BigInt& Other
) const

 This <= Other Math/BigInt.h  

bool IsLessThanZero()

 This < 0 Math/BigInt.h  

bool IsNegative()

 Checks if this integer is negative. Math/BigInt.h  

bool IsZero()

 This == 0 Math/BigInt.h  

void Modulo ( const BigInt& Modulus
)

 Performs modulo operation on this integer. Math/BigInt.h  

void Multiply ( const BigInt& Factor
)

 Multiplies two integers. Math/BigInt.h  

void MultiplyFast ( const BigInt& Factor
)

 Multiplies two positive integers. Math/BigInt.h  

void Negate()

 Negates this integer. value = -value Math/BigInt.h  

void Parse ( const FString& Value
)

 Parses a string representing a hex value Math/BigInt.h  

void Set ( int64 Value
)

 Initializes this big int with a 64 bit integer value. Math/BigInt.h  

void SetBit ( int32 BitIndex,
int32 Value
)

 Sets a bit value. Math/BigInt.h  

void ShiftLeft ( const int32 BitCount
)

 Shift left by the specified amount of bits. Math/BigInt.h  

void ShiftLeftByOneInternal()

 Shift left by 1 bit. Math/BigInt.h  

void ShiftLeftInternal ( const int32 BitCount
)

 Shift left by the specified amount of bits. Does not check if BitCount is valid. Math/BigInt.h  

void ShiftRight ( const int32 BitCount
)

 Shift right by the specified amount of bits. Math/BigInt.h  

void ShiftRightByOneInternal()

 Shift right by 1 bit. Math/BigInt.h  

void ShiftRightInternal ( const int32 BitCount
)

 Shift right by the specified amount of bits. Does not check if BitCount is valid. Math/BigInt.h  

int32 Sign()

 Returns the sign of this integer. Math/BigInt.h  

void Sqrt()

 Calculates square root of this integer. Math/BigInt.h  

void Subtract ( const BigInt& Other
)

 Subtracts two integers. Math/BigInt.h  

int64 ToInt ()

 Returns the value of this big int as a 64-bit integer. Math/BigInt.h  

FString ToString()

 Returns this big int as a string. Math/BigInt.h  

void Zero()

 Sets this integer to 0. Math/BigInt.h  

Static

Name Remarks Include Path Unreal Specifiers

static void MakePositiveFactors ( BigInt& FactorA,
int32& SignA,
BigInt& FactorB,
int32& SignB
)

 Makes sure both factors are positive integers and stores their original signs Math/BigInt.h  

static void RestoreSign ( BigInt& Result,
int32 SignA,
int32 SignB
)

 Restores a sign of a result based on the sign of two factors that produced the result. Math/BigInt.h  

Operators

Name Remarks Include Path Unreal Specifiers

BigInt operator- ( const BigInt& Other
) const

   Math/BigInt.h  

BigInt & operator--()

   Math/BigInt.h  

bool operator!= ( const BigInt& Other
) const

   Math/BigInt.h  

BigInt operator% ( const BigInt& Modulus
) const

   Math/BigInt.h  

BigInt & operator%= ( const BigInt& Modulus
)

   Math/BigInt.h  

BigInt operator& ( const BigInt& Other
) const

   Math/BigInt.h  

BigInt & operator&= ( const BigInt& Other
)

   Math/BigInt.h  

BigInt operator* ( const BigInt& Other
) const

   Math/BigInt.h  

BigInt & operator*= ( const BigInt& Other
)

   Math/BigInt.h  

BigInt operator/ ( const BigInt& Divider
) const

   Math/BigInt.h  

BigInt & operator/= ( const BigInt& Divider
)

   Math/BigInt.h  

bool operator[] ( int32 BitIndex
) const

 Bit indexing operator Math/BigInt.h  

BigInt operator| ( const BigInt& Other
) const

   Math/BigInt.h  

BigInt & operator|= ( const BigInt& Other
)

   Math/BigInt.h  

BigInt operator~()

   Math/BigInt.h  

BigInt operator+ ( const BigInt& Other
) const

   Math/BigInt.h  

BigInt & operator++()

   Math/BigInt.h  

BigInt & operator+= ( const BigInt& Other
)

   Math/BigInt.h  

TBigInt & operator= ( int64 Other
)

 Assignment operator for int64 values. Math/BigInt.h  

BigInt & operator-= ( const BigInt& Other
)

   Math/BigInt.h  

bool operator== ( const BigInt& Other
) const

   Math/BigInt.h  

bool operator> ( const BigInt& Other
) const

   Math/BigInt.h  

bool operator>= ( const BigInt& Other
) const

   Math/BigInt.h  

BigInt operator>> ( int32 Count
) const

 Begin operator overloads. Math/BigInt.h  

BigInt & operator>>= ( int32 Count
)

   Math/BigInt.h  

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