encoding

Documentation

Overview

Package encoding converts arbitrary objects into byte slices, and vis versa. It also contains helper functions for reading and writing length- prefixed data. See doc/Encoding.md for the full encoding specification.

Index

• Constants
• Variables
• func DecInt64(b []byte) int64
• func DecUint64(b []byte) uint64
• func EncInt64(i int64) (b []byte)
• func EncUint64(i uint64) (b []byte)
• func Marshal(v interface{}) []byte
• func MarshalAll(vs ...interface{}) []byte
• func ReadFile(filename string, v interface{}) error
• func ReadObject(r io.Reader, obj interface{}, maxLen uint64) error
• func ReadPrefix(r io.Reader, maxLen uint64) ([]byte, error)
• func Unmarshal(b []byte, v interface{}) error
• func UnmarshalAll(b []byte, vs ...interface{}) error
• func WriteFile(filename string, v interface{}) error
• func WriteInt(w io.Writer, i int) error
• func WriteObject(w io.Writer, v interface{}) error
• func WritePrefix(w io.Writer, data []byte) error
• func WriteUint64(w io.Writer, u uint64) error
• type Decoder
  • func NewDecoder(r io.Reader) *Decoder
  • func (d *Decoder) Decode(v interface{}) (err error)
  • func (d *Decoder) DecodeAll(vs ...interface{}) error
  • func (d *Decoder) Read(p []byte) (int, error)
• type Encoder
  • func NewEncoder(w io.Writer) *Encoder
  • func (e *Encoder) Encode(v interface{}) error
  • func (e *Encoder) EncodeAll(vs ...interface{}) error
• type SiaMarshaler
• type SiaUnmarshaler

Constants

const (
	// MaxObjectSize refers to the maximum size an object could have.
	// Limited to 12 MB.
	MaxObjectSize = 12e6

	// MaxSliceSize refers to the maximum size slice could have. Limited
	// to 5 MB.
	MaxSliceSize = 5e6 // 5 MB
)

Variables

var (

	// ErrObjectTooLarge is an error when encoded object exceeds size limit.
	ErrObjectTooLarge = errors.New("encoded object exceeds size limit")
	// ErrSliceTooLarge is an error when encoded slice is too large.
	ErrSliceTooLarge = errors.New("encoded slice is too large")
)

Functions

func DecInt64

func DecInt64(b []byte) int64

DecInt64 decodes a slice of 8 bytes into an int64. If len(b) < 8, the slice is padded with zeros.

func DecUint64

func DecUint64(b []byte) uint64

DecUint64 decodes a slice of 8 bytes into a uint64. If len(b) < 8, the slice is padded with zeros.

func EncInt64

func EncInt64(i int64) (b []byte)

EncInt64 encodes an int64 as a slice of 8 bytes.

func EncUint64

func EncUint64(i uint64) (b []byte)

EncUint64 encodes a uint64 as a slice of 8 bytes.

func Marshal

func Marshal(v interface{}) []byte

Marshal returns the encoding of v. For encoding details, see the package docstring.

func MarshalAll

func MarshalAll(vs ...interface{}) []byte

MarshalAll encodes all of its inputs and returns their concatenation.

func ReadFile

func ReadFile(filename string, v interface{}) error

ReadFile reads the contents of a file and decodes them into v.

func ReadObject

func ReadObject(r io.Reader, obj interface{}, maxLen uint64) error

ReadObject reads and decodes a length-prefixed and marshalled object.

func ReadPrefix

func ReadPrefix(r io.Reader, maxLen uint64) ([]byte, error)

ReadPrefix reads an 8-byte length prefixes, followed by the number of bytes specified in the prefix. The operation is aborted if the prefix exceeds a specified maximum length.

func Unmarshal

func Unmarshal(b []byte, v interface{}) error

Unmarshal decodes the encoded value b and stores it in v, which must be a pointer. The decoding rules are the inverse of those specified in the package docstring for marshaling.

func UnmarshalAll

func UnmarshalAll(b []byte, vs ...interface{}) error

UnmarshalAll decodes the encoded values in b and stores them in vs, which must be pointers.

func WriteFile

func WriteFile(filename string, v interface{}) error

WriteFile writes v to a file. The file will be created if it does not exist.

func WriteInt

func WriteInt(w io.Writer, i int) error

WriteInt writes i to w.

func WriteObject

func WriteObject(w io.Writer, v interface{}) error

WriteObject writes a length-prefixed object to w.

func WritePrefix

func WritePrefix(w io.Writer, data []byte) error

WritePrefix writes a length-prefixed byte slice to w.

func WriteUint64

func WriteUint64(w io.Writer, u uint64) error

WriteUint64 writes u to w.

Types

type Decoder

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

A Decoder reads and decodes values from an input stream.

func NewDecoder

func NewDecoder(r io.Reader) *Decoder

NewDecoder returns a new decoder that reads from r.

func (*Decoder) Decode

func (d *Decoder) Decode(v interface{}) (err error)

Decode reads the next encoded value from its input stream and stores it in v, which must be a pointer. The decoding rules are the inverse of those specified in the package docstring.

func (*Decoder) DecodeAll

func (d *Decoder) DecodeAll(vs ...interface{}) error

DecodeAll decodes a variable number of arguments.

func (*Decoder) Read

func (d *Decoder) Read(p []byte) (int, error)

Read implements the io.Reader interface. It also keeps track of the total number of bytes decoded, and panics if that number exceeds a global maximum.

type Encoder

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

An Encoder writes objects to an output stream.

func NewEncoder

func NewEncoder(w io.Writer) *Encoder

NewEncoder returns a new encoder that writes to w.

func (*Encoder) Encode

func (e *Encoder) Encode(v interface{}) error

Encode writes the encoding of v to the stream. For encoding details, see the package docstring.

func (*Encoder) EncodeAll

func (e *Encoder) EncodeAll(vs ...interface{}) error

EncodeAll encodes a variable number of arguments.

type SiaMarshaler

type SiaMarshaler interface {
	MarshalSia(io.Writer) error
}

A SiaMarshaler can encode and write itself to a stream.

type SiaUnmarshaler

type SiaUnmarshaler interface {
	UnmarshalSia(io.Reader) error
}

A SiaUnmarshaler can read and decode itself from a stream.