chunkenc

package

v0.0.5 Latest Latest Go to latest Published: Aug 20, 2018 License: Apache-2.0 Imports: 5 Imported by: 12

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func ToUint64(bytes []byte) []uint64

type Appender interface {
	Append(int64, float64)
	Chunk() Chunk
}

Appender adds sample pairs to a chunk.

type Chunk interface {
	Bytes() []byte
	Clear()
	Encoding() Encoding
	Appender() (Appender, error)
	Iterator() Iterator
}

Chunk holds a sequence of sample pairs that can be iterated over and appended to.

func FromData(e Encoding, d []byte, samples uint16) (Chunk, error)

FromData returns a chunk from a byte slice of chunk data.

func NewXORChunk() Chunk

NewXORChunk returns a new chunk with XOR encoding of the given size.

type Encoding uint8

Encoding is the identifier for a chunk encoding.

const (
	EncNone Encoding = 0
	EncXOR  Encoding = 1
)

The different available chunk encodings.

func (e Encoding) String() string

type Iterator interface {
	At() (int64, float64)
	Err() error
	Next() bool
}

Iterator is a simple iterator that can only get the next value.

func NewNopIterator() Iterator

NewNopIterator returns a new chunk iterator that does not hold any data.

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

XORChunk holds XOR encoded sample data.

func (c *XORChunk) Appender() (Appender, error)

Appender implements the Chunk interface. new implementation, doesnt read the existing buffer, assume its new

func (c *XORChunk) Bytes() []byte

Bytes returns the underlying byte slice of the chunk.

func (c *XORChunk) Clear()

func (c *XORChunk) Encoding() Encoding

Encoding returns the encoding type.

func (c *XORChunk) Iterator() Iterator

Iterator implements the Chunk interface.