go/src/compress/lzw/writer.go

type writer …

const maxCode …

const invalidCode …

const tableSize …

const tableMask …

const invalidEntry …

type Writer …

// writeLSB writes the code c for "Least Significant Bits first" data.
func (w *Writer) writeLSB(c uint32) error { … }

// writeMSB writes the code c for "Most Significant Bits first" data.
func (w *Writer) writeMSB(c uint32) error { … }

var errOutOfCodes …

// incHi increments e.hi and checks for both overflow and running out of
// unused codes. In the latter case, incHi sends a clear code, resets the
// writer state and returns errOutOfCodes.
func (w *Writer) incHi() error { … }

// Write writes a compressed representation of p to w's underlying writer.
func (w *Writer) Write(p []byte) (n int, err error) { … }

// Close closes the [Writer], flushing any pending output. It does not close
// w's underlying writer.
func (w *Writer) Close() error { … }

// Reset clears the [Writer]'s state and allows it to be reused again
// as a new [Writer].
func (w *Writer) Reset(dst io.Writer, order Order, litWidth int) { … }

// NewWriter creates a new [io.WriteCloser].
// Writes to the returned [io.WriteCloser] are compressed and written to w.
// It is the caller's responsibility to call Close on the WriteCloser when
// finished writing.
// The number of bits to use for literal codes, litWidth, must be in the
// range [2,8] and is typically 8. Input bytes must be less than 1<<litWidth.
//
// It is guaranteed that the underlying type of the returned [io.WriteCloser]
// is a *[Writer].
func NewWriter(w io.Writer, order Order, litWidth int) io.WriteCloser { … }

func newWriter(dst io.Writer, order Order, litWidth int) *Writer { … }

func (w *Writer) init(dst io.Writer, order Order, litWidth int) { … }