buf.readInt8([offset])

• offset <integer> 在开始读取之前要跳过的字节数。必须满足 0 <= offset <= buf.length - 1。默认值： 0。
• 返回：<integer>

从 buf 中指定的 offset 读取一个有符号的 8 位整数。

【Reads a signed 8-bit integer from buf at the specified offset.】

从 Buffer 读取的整数被解释为二进制补码的有符号值。

【Integers read from a Buffer are interpreted as two's complement signed values.】

import { Buffer } from 'node:buffer';

const buf = Buffer.from([-1, 5]);

console.log(buf.readInt8(0));
// Prints: -1
console.log(buf.readInt8(1));
// Prints: 5
console.log(buf.readInt8(2));
// Throws ERR_OUT_OF_RANGE.const { Buffer } = require('node:buffer');

const buf = Buffer.from([-1, 5]);

console.log(buf.readInt8(0));
// Prints: -1
console.log(buf.readInt8(1));
// Prints: 5
console.log(buf.readInt8(2));
// Throws ERR_OUT_OF_RANGE.拷贝