@ibr/buffy

> Structured data decoder / encoder

``typescript
import { Encoder, Decoder, DefinitionRegistry, PropertiesConfig, NumberSize } from '@ibr/buffy';

const config: PropertiesConfig = ([
{
reserved: NumberSize.UInt8,
fixed: 1,
},
{
name: 'simple',
value: { size: NumberSize.UInt8 },
},
{
name: 'nested',
properties: [
{
name: 'prop',
value: { size: NumberSize.UInt8 },
},
],
},
{
name: 'array',
value: [
{ size: NumberSize.UInt4 },
{ size: NumberSize.UInt2 },
{ size: NumberSize.UInt2 },
{ size: NumberSize.UInt16 },
],
},
{
name: 'nestedArray',
value: [
{ size: NumberSize.UInt2 },
[
{ size: NumberSize.UInt2 },
{ size: NumberSize.UInt4 },
{
properties: [
{
name: 'value',
value: { size: NumberSize.UInt16 },
},
],
},
],
],
},
]);

const data = {
simple: null,
nested: { prop: 1 },
array: [1, 1, 1, 1],
nestedArray: [1, [1, 1, { value: 97 }]],
};

const buff = Buffer.from([
0b00000001,
0b11111111,
0b00000001,
0b00010101,
0b00000001,
0b00000000,
0b01010001,
0b01100001,
0b00000000,
]);

const encoder = new Encoder([config]);
const decoder = new Decoder(new DefinitionRegistry(), config);

encoder.resultSize // => 9 (bytes)
encoder.encode(data) // => is equal to buff
decoder.decode(buff) // => is equal to data
``