Allow passing in byte buffer like structures to main/encoding/base64.decodeBase64

[elee1766]

Is your feature request related to a problem? Please describe.

I would like to use decodeBase64, but my base64 text is already in a uint8array. I would like to avoid having to copy my uint8array to a string, just so it can be parsed to a uint8array by TextEncoder.encode() in decodeBase64

Describe the solution you'd like

just like how encodeBase64(data: ArrayBuffer | Uint8Array | string): string accepts multiple datatypes, decodeBase64 should perhaps do the same, ala decodeBase64(data: ArrayBuffer | Uint8Array | string): Uint8Array_. can do the same type switching that encodeBase64 does, and skip the textencoder.encode

Describe alternatives you've considered

i could copy the code out of base64.ts and make my own version that accepts both types.

[BlackAsLight]

I think this could be a good idea, but in the next release of the std there will be a decodeRawBase64 function available which would let you accomplish this.

import { decodeRawBase64, encodeBase64 } from "jsr:@std/encoding/unstable-base64"

let buffer = encodeBase64(await Deno.readFile("path"));
buffer = buffer.subarray(0, decodeRawBase64(buffer, 0, 0));
console.log(buffer);