common

package
v1.8.0 Latest Latest
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 Go to latest Published: Oct 14, 2019 License: LGPL-3.0 Imports: 14 Imported by: 0

Documentation

Overview

* Copyright (C) 2018 The ontology Authors * This file is part of The ontology library. * * The ontology is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * The ontology is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with The ontology. If not, see <http://www.gnu.org/licenses/>.

Index

Constants

View Source 
const (
	UINT16_SIZE  = 2
	UINT32_SIZE  = 4
	UINT64_SIZE  = 8
	UINT256_SIZE = 32
)
View Source 
const ADDR_LEN = 20
View Source 
const (
	Decimal = 100000000
)
View Source 
const I128_SIZE = 16
View Source 
const (
	MAX_UINT64 = math.MaxUint64
)
View Source 
const MaxBase58AddrLen = 2048 // just to avoid dos

Variables

View Source 
var ADDRESS_EMPTY = Address{}
View Source 
var ErrIrregularData = errors.New("irregular data")
View Source 
var ErrTooLarge = errors.New("bytes.Buffer: too large")
View Source 
var ErrWriteExceedLimitedCount = errors.New("writer exceed limited count")
View Source 
var U128_EMPTY = U128{}
View Source 
var UINT256_EMPTY = Uint256{}

Functions

func BigIntFromNeoBytes 

func BigIntFromNeoBytes(ba []byte) *big.Int

func BigIntToNeoBytes 

func BigIntToNeoBytes(data *big.Int) []byte

neo encoding: https://docs.microsoft.com/en-us/dotnet/api/system.numerics.biginteger.tobytearray?view=netframework-4.7.2

func FileExisted 

func FileExisted(filename string) bool

FileExisted checks whether filename exists in filesystem

func GetNonce 

func GetNonce() uint64

GetNonce returns random nonce

func HexToBytes 

func HexToBytes(value string) ([]byte, error)

HexToBytes convert hex string to []byte

func SafeAdd added in v0.9.2 

func SafeAdd(x, y uint64) (uint64, bool)

func SafeMul added in v0.9.2 

func SafeMul(x, y uint64) (uint64, bool)

func SafeSub added in v0.9.2 

func SafeSub(x, y uint64) (uint64, bool)

func ToArrayReverse 

func ToArrayReverse(arr []byte) []byte

func ToHexString 

func ToHexString(data []byte) string

ToHexString convert []byte to hex string

Types

type Address 

type Address [ADDR_LEN]byte

func AddressFromBase58 

func AddressFromBase58(encoded string) (Address, error)

AddressFromBase58 returns Address from encoded base58 string

func AddressFromHexString 

func AddressFromHexString(s string) (Address, error)

AddressParseFromHexString returns parsed Address

func AddressFromVmCode added in v1.5.1 

func AddressFromVmCode(code []byte) Address

func AddressParseFromBytes 

func AddressParseFromBytes(f []byte) (Address, error)

AddressParseFromBytes returns parsed Address

func (*Address) Deserialize 

func (self *Address) Deserialize(r io.Reader) error

Deserialize deserialize Address from io.Reader

func (*Address) Serialize 

func (self *Address) Serialize(w io.Writer) error

Serialize serialize Address into io.Writer

func (*Address) ToBase58 

func (f *Address) ToBase58() string

ToBase58 returns base58 encoded address string

func (*Address) ToHexString 

func (self *Address) ToHexString() string

ToHexString returns hex string representation of Address

type Fixed64 

type Fixed64 int64

the 64 bit fixed-point number, precise 10^-8

func FromDecimal 

func FromDecimal(value int64) Fixed64

func (*Fixed64) Deserialization added in v1.6.1 

func (f *Fixed64) Deserialization(source *ZeroCopySource) error

func (Fixed64) GetData 

func (f Fixed64) GetData() int64

func (*Fixed64) Serialization added in v1.6.1 

func (f *Fixed64) Serialization(sink *ZeroCopySink)

func (Fixed64) String 

func (f Fixed64) String() string

type I128 added in v1.8.0 

type I128 [I128_SIZE]byte // little endian i128

func I128FromBigInt added in v1.8.0 

func I128FromBigInt(val *big.Int) (I128, error)

val should in i128 range

func I128FromInt64 added in v1.8.0 

func I128FromInt64(val int64) I128

func I128FromUint64 added in v1.8.0 

func I128FromUint64(val uint64) I128

func (*I128) ToBEHex added in v1.8.0 

func (self *I128) ToBEHex() string

to big endian hex string

func (I128) ToBigInt added in v1.8.0 

func (self I128) ToBigInt() *big.Int

func (*I128) ToLEHex added in v1.8.0 

func (self *I128) ToLEHex() string

to little endian hex string

func (*I128) ToNumString added in v1.8.0 

func (self *I128) ToNumString() string

type Inventory 

type Inventory interface {
	//sig.SignableData
	Hash() Uint256
	Verify() error
	Type() InventoryType
}

TODO: temp inventory

type InventoryType 

type InventoryType byte
const (
	TRANSACTION InventoryType = 0x01
	BLOCK       InventoryType = 0x02
	CONSENSUS   InventoryType = 0xe0
)

type LimitedWriter added in v0.9.3 

type LimitedWriter struct {
	// contains filtered or unexported fields
}

func NewLimitedWriter added in v0.9.3 

func NewLimitedWriter(w io.Writer, max uint64) *LimitedWriter

func (*LimitedWriter) Count added in v0.9.3 

func (self *LimitedWriter) Count() uint64

Count function return counted bytes

func (*LimitedWriter) Write added in v0.9.3 

func (self *LimitedWriter) Write(buf []byte) (int, error)

type U128 added in v1.8.0 

type U128 [I128_SIZE]byte // little endian u128

func (U128) ToBigInt added in v1.8.0 

func (self U128) ToBigInt() *big.Int

func (U128) ToI128 added in v1.8.0 

func (self U128) ToI128() I128

type Uint256 

type Uint256 [UINT256_SIZE]byte

func ComputeMerkleRoot 

func ComputeMerkleRoot(hashes []Uint256) Uint256

param hashes will be used as workspace

func Uint256FromHexString 

func Uint256FromHexString(s string) (Uint256, error)

func Uint256ParseFromBytes 

func Uint256ParseFromBytes(f []byte) (Uint256, error)

func (*Uint256) Deserialize 

func (u *Uint256) Deserialize(r io.Reader) error

func (*Uint256) Serialize 

func (u *Uint256) Serialize(w io.Writer) error

func (*Uint256) ToArray 

func (u *Uint256) ToArray() []byte

func (*Uint256) ToHexString 

func (u *Uint256) ToHexString() string

type ZeroCopySink added in v1.0.3 

type ZeroCopySink struct {
	// contains filtered or unexported fields
}

func NewZeroCopySink added in v1.0.3 

func NewZeroCopySink(b []byte) *ZeroCopySink

NewReader returns a new ZeroCopySink reading from b.

func (*ZeroCopySink) BackUp added in v1.0.3 

func (self *ZeroCopySink) BackUp(n uint64)

Backs up a number of bytes, so that the next call to NextXXX() returns data again that was already returned by the last call to NextXXX().

func (*ZeroCopySink) Bytes added in v1.0.3 

func (self *ZeroCopySink) Bytes() []byte

func (*ZeroCopySink) NextBytes added in v1.0.3 

func (self *ZeroCopySink) NextBytes(n uint64) (data []byte)

func (*ZeroCopySink) Reset added in v1.0.3 

func (self *ZeroCopySink) Reset()

func (*ZeroCopySink) Size added in v1.0.3 

func (self *ZeroCopySink) Size() uint64

func (*ZeroCopySink) WriteAddress added in v1.0.3 

func (self *ZeroCopySink) WriteAddress(addr Address)

func (*ZeroCopySink) WriteBool added in v1.0.3 

func (self *ZeroCopySink) WriteBool(data bool)

func (*ZeroCopySink) WriteByte added in v1.0.3 

func (self *ZeroCopySink) WriteByte(c byte)

func (*ZeroCopySink) WriteBytes added in v1.0.3 

func (self *ZeroCopySink) WriteBytes(p []byte)

func (*ZeroCopySink) WriteHash added in v1.0.3 

func (self *ZeroCopySink) WriteHash(hash Uint256)

func (*ZeroCopySink) WriteI128 added in v1.8.0 

func (self *ZeroCopySink) WriteI128(i128 I128)

func (*ZeroCopySink) WriteInt16 added in v1.0.3 

func (self *ZeroCopySink) WriteInt16(data int16)

func (*ZeroCopySink) WriteInt32 added in v1.0.3 

func (self *ZeroCopySink) WriteInt32(data int32)

func (*ZeroCopySink) WriteInt64 added in v1.0.3 

func (self *ZeroCopySink) WriteInt64(data int64)

func (*ZeroCopySink) WriteString added in v1.0.3 

func (self *ZeroCopySink) WriteString(data string) (size uint64)

func (*ZeroCopySink) WriteU128 added in v1.8.0 

func (self *ZeroCopySink) WriteU128(u128 U128)

func (*ZeroCopySink) WriteUint16 added in v1.0.3 

func (self *ZeroCopySink) WriteUint16(data uint16)

func (*ZeroCopySink) WriteUint32 added in v1.0.3 

func (self *ZeroCopySink) WriteUint32(data uint32)

func (*ZeroCopySink) WriteUint64 added in v1.0.3 

func (self *ZeroCopySink) WriteUint64(data uint64)

func (*ZeroCopySink) WriteUint8 added in v1.0.3 

func (self *ZeroCopySink) WriteUint8(data uint8)

func (*ZeroCopySink) WriteVarBytes added in v1.0.3 

func (self *ZeroCopySink) WriteVarBytes(data []byte) (size uint64)

func (*ZeroCopySink) WriteVarUint added in v1.0.3 

func (self *ZeroCopySink) WriteVarUint(data uint64) (size uint64)

type ZeroCopySource added in v1.0.3 

type ZeroCopySource struct {
	// contains filtered or unexported fields
}

func NewZeroCopySource added in v1.0.3 

func NewZeroCopySource(b []byte) *ZeroCopySource

NewReader returns a new ZeroCopySource reading from b.

func (*ZeroCopySource) BackUp added in v1.0.3 

func (self *ZeroCopySource) BackUp(n uint64)

Backs up a number of bytes, so that the next call to NextXXX() returns data again that was already returned by the last call to NextXXX().

func (*ZeroCopySource) Len added in v1.0.3 

func (self *ZeroCopySource) Len() uint64

Len returns the number of bytes of the unread portion of the slice.

func (*ZeroCopySource) NextAddress added in v1.0.3 

func (self *ZeroCopySource) NextAddress() (data Address, eof bool)

func (*ZeroCopySource) NextBool added in v1.0.3 

func (self *ZeroCopySource) NextBool() (data bool, irregular bool, eof bool)

func (*ZeroCopySource) NextByte added in v1.0.3 

func (self *ZeroCopySource) NextByte() (data byte, eof bool)

ReadByte implements the io.ByteReader interface.

func (*ZeroCopySource) NextBytes added in v1.0.3 

func (self *ZeroCopySource) NextBytes(n uint64) (data []byte, eof bool)

Read implements the io.ZeroCopySource interface.

func (*ZeroCopySource) NextHash added in v1.0.3 

func (self *ZeroCopySource) NextHash() (data Uint256, eof bool)

func (*ZeroCopySource) NextI128 added in v1.8.0 

func (self *ZeroCopySource) NextI128() (data I128, eof bool)

func (*ZeroCopySource) NextInt16 added in v1.0.3 

func (self *ZeroCopySource) NextInt16() (data int16, eof bool)

func (*ZeroCopySource) NextInt32 added in v1.0.3 

func (self *ZeroCopySource) NextInt32() (data int32, eof bool)

func (*ZeroCopySource) NextInt64 added in v1.0.3 

func (self *ZeroCopySource) NextInt64() (data int64, eof bool)

func (*ZeroCopySource) NextString added in v1.0.3 

func (self *ZeroCopySource) NextString() (data string, size uint64, irregular bool, eof bool)

func (*ZeroCopySource) NextUint16 added in v1.0.3 

func (self *ZeroCopySource) NextUint16() (data uint16, eof bool)

func (*ZeroCopySource) NextUint32 added in v1.0.3 

func (self *ZeroCopySource) NextUint32() (data uint32, eof bool)

func (*ZeroCopySource) NextUint64 added in v1.0.3 

func (self *ZeroCopySource) NextUint64() (data uint64, eof bool)

func (*ZeroCopySource) NextUint8 added in v1.0.3 

func (self *ZeroCopySource) NextUint8() (data uint8, eof bool)

func (*ZeroCopySource) NextVarBytes added in v1.0.3 

func (self *ZeroCopySource) NextVarBytes() (data []byte, size uint64, irregular bool, eof bool)

func (*ZeroCopySource) NextVarUint added in v1.0.3 

func (self *ZeroCopySource) NextVarUint() (data uint64, size uint64, irregular bool, eof bool)

func (*ZeroCopySource) Pos added in v1.0.3 

func (self *ZeroCopySource) Pos() uint64

func (*ZeroCopySource) Size added in v1.0.3 

func (self *ZeroCopySource) Size() uint64

Size returns the original length of the underlying byte slice. Size is the number of bytes available for reading via ReadAt. The returned value is always the same and is not affected by calls to any other method.

func (*ZeroCopySource) Skip added in v1.0.3 

func (self *ZeroCopySource) Skip(n uint64) (eof bool)

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