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The Deno Standard Library
function decodeVarint
import { decodeVarint } from "";

Given a non empty buf, starting at offset (default: 0), begin decoding bytes as VarInt encoded bytes, for a maximum of 10 bytes (offset + 10). The returned tuple is of the decoded varint 32-bit number, and the new offset with which to continue decoding other data.

If a bigint in return is undesired, the decode32 function will return a number, but this should only be used in cases where the varint is assured to be 32-bits. If in doubt, use decode().

To know how many bytes the VarInt took to encode, simply negate offset from the returned new offset.


Example 1

import { decodeVarint } from "";

const buf = new Uint8Array([0x8E, 0x02]);
decodeVarint(buf); // [ 300n, 2 ];


buf: Uint8Array

The buffer to decode from.

offset = [UNSUPPORTED]

The offset to start decoding from.


[bigint, number]

A tuple of the decoded varint 64-bit number, and the new offset.