ringbuffer

Documentation

Index

• Variables
• type RingBuffer
  • func New(size int) *RingBuffer
  • func (r *RingBuffer) ByteBuffer() *bytebuffer.ByteBuffer
  • func (r *RingBuffer) Cap() int
  • func (r *RingBuffer) Discard(n int)
  • func (r *RingBuffer) Free() int
  • func (r *RingBuffer) IsEmpty() bool
  • func (r *RingBuffer) IsFull() bool
  • func (r *RingBuffer) Len() int
  • func (r *RingBuffer) Length() int
  • func (r *RingBuffer) Peek(n int) (head []byte, tail []byte)
  • func (r *RingBuffer) PeekAll() (head []byte, tail []byte)
  • func (r *RingBuffer) Read(p []byte) (n int, err error)
  • func (r *RingBuffer) ReadByte() (b byte, err error)
  • func (r *RingBuffer) Reset()
  • func (r *RingBuffer) WithByteBuffer(b []byte) *bytebuffer.ByteBuffer
  • func (r *RingBuffer) Write(p []byte) (n int, err error)
  • func (r *RingBuffer) WriteByte(c byte) error
  • func (r *RingBuffer) WriteString(s string) (int, error)

Variables

var EmptyRingBuffer = New(0)

EmptyRingBuffer can be used as a placeholder for those closed connections.

var ErrIsEmpty = errors.New("ring-buffer is empty")

ErrIsEmpty will be returned when trying to read a empty ring-buffer.

Types

type RingBuffer

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

RingBuffer is a circular buffer that implement io.ReaderWriter interface.

func New

func New(size int) *RingBuffer

New returns a new RingBuffer whose buffer has the given size.

func (*RingBuffer) ByteBuffer

func (r *RingBuffer) ByteBuffer() *bytebuffer.ByteBuffer

ByteBuffer returns all available read bytes. It does not move the read pointer and only copy the available data.

func (*RingBuffer) Cap

func (r *RingBuffer) Cap() int

Cap returns the size of the underlying buffer.

func (*RingBuffer) Discard

func (r *RingBuffer) Discard(n int)

Discard skips the next n bytes by advancing the read pointer.

func (*RingBuffer) Free

func (r *RingBuffer) Free() int

Free returns the length of available bytes to write.

func (*RingBuffer) IsEmpty

func (r *RingBuffer) IsEmpty() bool

IsEmpty tells if this ring-buffer is empty.

func (*RingBuffer) IsFull

func (r *RingBuffer) IsFull() bool

IsFull tells if this ring-buffer is full.

func (*RingBuffer) Len

func (r *RingBuffer) Len() int

Len returns the length of the underlying buffer.

func (*RingBuffer) Length

func (r *RingBuffer) Length() int

Length returns the length of available read bytes.

func (*RingBuffer) Peek

func (r *RingBuffer) Peek(n int) (head []byte, tail []byte)

Peek returns the next n bytes without advancing the read pointer.

func (*RingBuffer) PeekAll

func (r *RingBuffer) PeekAll() (head []byte, tail []byte)

PeekAll returns all bytes without advancing the read pointer.

func (*RingBuffer) Read

func (r *RingBuffer) Read(p []byte) (n int, err error)

Read reads up to len(p) bytes into p. It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. Even if Read returns n < len(p), it may use all of p as scratch space during the call. If some data is available but not len(p) bytes, Read conventionally returns what is available instead of waiting for more. When Read encounters an error or end-of-file condition after successfully reading n > 0 bytes, it returns the number of bytes read. It may return the (non-nil) error from the same call or return the error (and n == 0) from a subsequent call. Callers should always process the n > 0 bytes returned before considering the error err. Doing so correctly handles I/O errors that happen after reading some bytes and also both of the allowed EOF behaviors.

func (*RingBuffer) ReadByte

func (r *RingBuffer) ReadByte() (b byte, err error)

ReadByte reads and returns the next byte from the input or ErrIsEmpty.

func (*RingBuffer) Reset

func (r *RingBuffer) Reset()

Reset the read pointer and write pointer to zero.

func (*RingBuffer) WithByteBuffer

func (r *RingBuffer) WithByteBuffer(b []byte) *bytebuffer.ByteBuffer

WithByteBuffer combines the available read bytes and the given bytes. It does not move the read pointer and only copy the available data.

func (*RingBuffer) Write

func (r *RingBuffer) Write(p []byte) (n int, err error)

Write writes len(p) bytes from p to the underlying buf. It returns the number of bytes written from p (n == len(p) > 0) and any error encountered that caused the write to stop early. If the length of p is greater than the writable capacity of this ring-buffer, it will allocate more memory to this ring-buffer. Write must not modify the slice data, even temporarily.

func (*RingBuffer) WriteByte

func (r *RingBuffer) WriteByte(c byte) error

WriteByte writes one byte into buffer.

func (*RingBuffer) WriteString

func (r *RingBuffer) WriteString(s string) (int, error)

WriteString writes the contents of the string s to buffer, which accepts a slice of bytes.