61 lines
1.5 KiB
TypeScript
61 lines
1.5 KiB
TypeScript
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import {
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decodeBase64,
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decodeHex,
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encodeBase64,
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encodeHex,
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} from "@std/encoding";
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const encoder = new TextEncoder();
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const decoder = new TextDecoder();
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export type BinaryLike = string | Uint8Array;
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export function from_utf8(s: BinaryLike): string {
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return typeof s === "string" ? s : decoder.decode(s);
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}
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export function to_utf8(s: BinaryLike): Uint8Array {
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return typeof s === "string" ? encoder.encode(s) : s;
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}
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export function encode_utf8(s: BinaryLike, buf: Uint8Array): number {
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if (typeof s === "string") return encoder.encodeInto(s, buf).written;
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else return buf.set(s), s.length;
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}
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export function from_hex(s: BinaryLike): Uint8Array {
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return decodeHex(from_utf8(s));
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}
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export function to_hex(b: BinaryLike): string {
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return encodeHex(to_utf8(b));
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}
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export function from_base64(s: BinaryLike): Uint8Array {
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return decodeBase64(from_utf8(s));
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}
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export function to_base64(b: BinaryLike): string {
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return encodeBase64(to_utf8(b));
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}
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export { equals as buf_eq, concat as buf_concat } from "@std/bytes";
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export function buf_concat_fast(a: Uint8Array, b: Uint8Array) {
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const m = a.length;
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const c = new Uint8Array(m + b.length);
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return c.set(a, 0), c.set(b, m), c;
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}
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export function buf_resize(buf: Uint8Array, n: number) {
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const res = new Uint8Array(n);
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return res.set(buf.subarray(0, n)), res;
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}
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export function buf_xor(a: Uint8Array, b: Uint8Array) {
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const n = Math.max(a.length, b.length);
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const c = new Uint8Array(n);
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for (let i = 0; i < n; i++) c[i] = a[i] ^ b[i];
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return c;
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}
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