buf.readUIntBE(offset, byteLength)

• offset <integer> 在开始读取之前要跳过的字节数。必须满足 0 <= offset <= buf.length - byteLength。
• byteLength <integer> 要读取的字节数。必须满足 0 < byteLength <= 6。
• 返回：<integer>

从指定的 offset 位置的 buf 中读取 byteLength 个字节，并将结果解释为无符号大端整数，最多支持 48 位精度。

【Reads byteLength number of bytes from buf at the specified offset and interprets the result as an unsigned big-endian integer supporting up to 48 bits of accuracy.】

该函数也可以通过 readUintBE 别名使用。

【This function is also available under the readUintBE alias.】

import { Buffer } from 'node:buffer';

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

console.log(buf.readUIntBE(0, 6).toString(16));
// Prints: 1234567890ab
console.log(buf.readUIntBE(1, 6).toString(16));
// Throws ERR_OUT_OF_RANGE.const { Buffer } = require('node:buffer');

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

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