method

buffer.Buffer.readIntBE

offset: number,

byteLength: number

): number;

Reads byteLength number of bytes from buf at the specified offset and interprets the result as a big-endian, two's complement signed value supporting up to 48 bits of accuracy.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);

console.log(buf.readIntBE(0, 6).toString(16));
// Prints: 1234567890ab
console.log(buf.readIntBE(1, 6).toString(16));
// Throws ERR_OUT_OF_RANGE.
console.log(buf.readIntBE(1, 0).toString(16));
// Throws ERR_OUT_OF_RANGE.

@param offset

Number of bytes to skip before starting to read. Must satisfy 0 <= offset <= buf.length - byteLength.

@param byteLength

Number of bytes to read. Must satisfy 0 < byteLength <= 6.