binary

package
v0.0.0-...-2935fa7 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Apr 10, 2021 License: Apache-2.0 Imports: 7 Imported by: 0

Documentation

Index

Constants

View Source 
const Word160Length = 20
View Source 
const Word256Bits = Word256Bytes * 8
View Source 
const Word256Bytes = 32
View Source 
const Word256Word160Delta = 12

Variables

View Source 
var (
	Zero256 = Word256{}
	One256  = LeftPadWord256([]byte{1})
)
View Source 
var Big256 = big.NewInt(256)
View Source 
var BigWord256Bytes = big.NewInt(Word256Bytes)
View Source 
var Zero160 = Word160{}

Functions

func BigIntFromLittleEndianBytes 

func BigIntFromLittleEndianBytes(bs []byte) *big.Int

Note: this function destructively reverses its input slice - pass a copy if the original is used elsewhere

func BigIntFromWord256 

func BigIntFromWord256(word Word256) *big.Int

func BigIntToLittleEndianBytes 

func BigIntToLittleEndianBytes(x *big.Int) []byte

func Fingerprint 

func Fingerprint(slice []byte) []byte

func FromTwosComplement 

func FromTwosComplement(x *big.Int, n uint) *big.Int

Interprets a positive big.Int as a n-bit two's complement signed integer

func Int64FromWord256 

func Int64FromWord256(word Word256) int64

func IsUint64SumOverflow 

func IsUint64SumOverflow(a, b uint64) bool

Returns whether a + b would be a uint64 overflow

func IsZeros 

func IsZeros(slice []byte) bool

func LeftPadBytes 

func LeftPadBytes(slice []byte, l int) []byte

func RightPadBytes 

func RightPadBytes(slice []byte, l int) []byte

func S256 

func S256(x *big.Int) *big.Int

Interprets a positive big.Int as a 256-bit two's complement signed integer

func SignExtend 

func SignExtend(x *big.Int, n uint) *big.Int

Treats the positive big int x as if it contains an embedded n bit signed integer in its least significant bits and extends that sign

func ToTwosComplement 

func ToTwosComplement(x *big.Int, n uint) *big.Int

Convert a possibly negative big.Int x to a positive big.Int encoded in two's complement

func Tuple256Split 

func Tuple256Split(t Tuple256) (Word256, Word256)

func U256 

func U256(x *big.Int) *big.Int

Converts a possibly negative big int x into a positive big int encoding a twos complement representation of x truncated to 32 bytes

func Uint64FromWord256 

func Uint64FromWord256(word Word256) uint64

Types

type HexBytes 

type HexBytes []byte

func (HexBytes) Bytes 

func (hb HexBytes) Bytes() []byte

func (HexBytes) Marshal 

func (hb HexBytes) Marshal() ([]byte, error)

Protobuf support

func (HexBytes) MarshalText 

func (hb HexBytes) MarshalText() ([]byte, error)

func (HexBytes) MarshalTo 

func (hb HexBytes) MarshalTo(data []byte) (int, error)

func (HexBytes) Size 

func (hb HexBytes) Size() int

func (HexBytes) String 

func (hb HexBytes) String() string

func (*HexBytes) Unmarshal 

func (hb *HexBytes) Unmarshal(data []byte) error

func (*HexBytes) UnmarshalText 

func (hb *HexBytes) UnmarshalText(hexBytes []byte) error

type Tuple256 

type Tuple256 struct {
	First  Word256
	Second Word256
}

func (Tuple256) Compare 

func (tuple Tuple256) Compare(other Tuple256) int

type Tuple256Slice 

type Tuple256Slice []Tuple256

func (Tuple256Slice) Len 

func (p Tuple256Slice) Len() int

func (Tuple256Slice) Less 

func (p Tuple256Slice) Less(i, j int) bool

func (Tuple256Slice) Sort 

func (p Tuple256Slice) Sort()

func (Tuple256Slice) Swap 

func (p Tuple256Slice) Swap(i, j int)

type Word160 

type Word160 [Word160Length]byte

func (Word160) Bytes 

func (w Word160) Bytes() []byte

func (Word160) Word256 

func (w Word160) Word256() (word256 Word256)

Pad a Word160 on the left and embed it in a Word256 (as it is for account addresses in EVM)

type Word256 

type Word256 [Word256Bytes]byte

func BigIntToWord256 

func BigIntToWord256(x *big.Int) Word256

func Int64ToWord256 

func Int64ToWord256(i int64) Word256

func LeftPadWord256 

func LeftPadWord256(bz []byte) (word Word256)

func RightPadWord256 

func RightPadWord256(bz []byte) (word Word256)

func Uint64ToWord256 

func Uint64ToWord256(i uint64) (word Word256)

func (Word256) Bytes 

func (w Word256) Bytes() []byte

func (Word256) Compare 

func (w Word256) Compare(other Word256) int

func (Word256) Copy 

func (w Word256) Copy() Word256

func (Word256) IsZero 

func (w Word256) IsZero() bool

func (*Word256) Marshal 

func (w *Word256) Marshal() ([]byte, error)

Gogo proto support

func (Word256) MarshalText 

func (w Word256) MarshalText() ([]byte, error)

func (*Word256) MarshalTo 

func (w *Word256) MarshalTo(data []byte) (int, error)

func (Word256) Postfix 

func (w Word256) Postfix(n int) []byte

func (Word256) Prefix 

func (w Word256) Prefix(n int) []byte

copied.

func (Word256) Size 

func (w Word256) Size() int

func (Word256) String 

func (w Word256) String() string

func (*Word256) Unmarshal 

func (w *Word256) Unmarshal(data []byte) error

func (*Word256) UnmarshalText 

func (w *Word256) UnmarshalText(hexBytes []byte) error

func (Word256) UnpadLeft 

func (w Word256) UnpadLeft() []byte

func (Word256) UnpadRight 

func (w Word256) UnpadRight() []byte

func (Word256) Word160 

func (w Word256) Word160() (w160 Word160)

Get a Word160 embedded a Word256 and padded on the left (as it is for account addresses in EVM)

type Words256 

type Words256 []Word256

func (Words256) Len 

func (ws Words256) Len() int

func (Words256) Less 

func (ws Words256) Less(i, j int) bool

func (Words256) Swap 

func (ws Words256) Swap(i, j int)

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.