buf.readIntBE(offset, byteLength)

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

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

• byteLength <integer> 要读取的字节数。必须满足 0 < byteLength <= 6。

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

• 返回：<integer>

  ¥Returns: <integer>

从指定的 offset 处的 buf 读取 byteLength 个字节，并将结果解释为支持最高 48 位精度的大端序、二进制补码有符号值。

¥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.const { Buffer } = require('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.拷贝