leb128 1.1.0 leb128: ^1.1.0 copied to clipboard
A Dart package that can read and write numbers in the LEB128, short for Little Endian Base 128, format.
LEB128 Encoder/Decoder #
This package offers easy-to-use methods that let you encode and decode LEB128 data. LEB128, which is short for Little Endian Base 128, is a code compression algorithm that is used in a variety of file formats. The most well-known are WebAssembly's binary .wasm
and Android's .dex
files.
Usage #
-
You can call the
Leb128.encodeSigned()
method to convert a Dartint
value into an LEB128 list of bytes. The list is aUint8List
object. Use this method for both positive and negative values. -
You can call the
Leb128.encodeUnsigned()
method to convert a Dartint
value, which is positive, into an LEB128 list of bytes. -
You can call the
Leb128.decodeSigned()
method to convert aUint8List
object into a Dartint
value. Use this method for signed LEB128 integers only. -
You can call the
Leb128.decodeUnsigned()
method to convert aUint8List
object into a Dartint
value. Use this method for unsigned LEB128 integers only.
This package also offers two utility methods namedLeb128.decodeVarint7()
and Leb128.decodeVaruint7()
, which are easier to use if you need to convert a single byte of data.