rle

Documentation

Overview

Package rle implements a simple RLE encoder, as used in ICNS format.

The encoded format can be seen as a sequence of segments of the following form: - 1 control byte N - a number of data bytes If the control byte value is N < 0x80, then the decoded data contains the

N+1 encoded bytes as is

If the control byte value is N >= 0x80, then the decoded data contains

N-0x80+3 repetitions of the following encoded byte

In particular, this means that the second case can cover only repetitions of

3 or more bytes.

Similarly, a "raw" sequence can contain only 128 (0x7f+1) bytes, and needs to be split if a longer non-repetitive pattern is seen.

Index

• func Decode(p []byte) []byte
• func Encode(b []byte) []byte

Functions

func Decode

func Decode(p []byte) []byte

Decode RLE-decodes the provided bytes.

func Encode

func Encode(b []byte) []byte

Encode RLE-encodes the provided bytes.