Function encodeVarint

Takes unsigned number num and converts it into a Varint encoded Uint8Array, returning a tuple consisting of a Uint8Array slice of the encoded Varint, and an offset where the Varint encoded bytes end within the Uint8Array.

If buf is not given then a Uint8Array will be created. offset defaults to 0.

If passed buf then that will be written into, starting at offset. The resulting returned Uint8Array will be a slice of buf. The resulting returned number is effectively offset + bytesWritten.

import { encodeVarint } from "@std/encoding/varint";
import { assertEquals } from "@std/assert";

const buf = new Uint8Array(10);
assertEquals(encodeVarint(42n, buf), [new Uint8Array([42]), 1]);
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