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6491ad4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | export const encoder = new TextEncoder();
export const decoder = new TextDecoder();
const MAX_INT32 = 2 ** 32;
export function concat(...buffers) {
const size = buffers.reduce((acc, { length }) => acc + length, 0);
const buf = new Uint8Array(size);
let i = 0;
for (const buffer of buffers) {
buf.set(buffer, i);
i += buffer.length;
}
return buf;
}
function writeUInt32BE(buf, value, offset) {
if (value < 0 || value >= MAX_INT32) {
throw new RangeError(`value must be >= 0 and <= ${MAX_INT32 - 1}. Received ${value}`);
}
buf.set([value >>> 24, value >>> 16, value >>> 8, value & 0xff], offset);
}
export function uint64be(value) {
const high = Math.floor(value / MAX_INT32);
const low = value % MAX_INT32;
const buf = new Uint8Array(8);
writeUInt32BE(buf, high, 0);
writeUInt32BE(buf, low, 4);
return buf;
}
export function uint32be(value) {
const buf = new Uint8Array(4);
writeUInt32BE(buf, value);
return buf;
}
export function encode(string) {
const bytes = new Uint8Array(string.length);
for (let i = 0; i < string.length; i++) {
const code = string.charCodeAt(i);
if (code > 127) {
throw new TypeError('non-ASCII string encountered in encode()');
}
bytes[i] = code;
}
return bytes;
}
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