buf.readInt32LE([offset])

版本历史

版本	变更
v10.0.0	删除了 `noAssert` 并且不再隐式强制将偏移量强制转换为 `uint32`。
v0.5.5	新增于: v0.5.5

offset <integer> 开始读取之前要跳过的字节数。必须满足 0 <= offset <= buf.length - 4。 默认值: 0。
返回: <integer>

从指定的 offset 处的 buf 读取有符号的小端序 32 位整数。

从 Buffer 读取的整数被解释为二进制补码有符号值。

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0, 0, 0, 5]);

console.log(buf.readInt32LE(0));
// 打印: 83886080
console.log(buf.readInt32LE(1));
// 抛出 ERR_OUT_OF_RANGE。const { Buffer } = require('node:buffer');

const buf = Buffer.from([0, 0, 0, 5]);

console.log(buf.readInt32LE(0));
// 打印: 83886080
console.log(buf.readInt32LE(1));
// 抛出 ERR_OUT_OF_RANGE。

History

Version	Changes
v10.0.0	Removed `noAssert` and no implicit coercion of the offset to `uint32` anymore.
v0.5.5	Added in: v0.5.5

offset <integer> Number of bytes to skip before starting to read. Must satisfy 0 <= offset <= buf.length - 4. Default: 0.
Returns: <integer>

Reads a signed, little-endian 32-bit integer from buf at the specified offset.

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

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0, 0, 0, 5]);

console.log(buf.readInt32LE(0));
// Prints: 83886080
console.log(buf.readInt32LE(1));
// Throws ERR_OUT_OF_RANGE.const { Buffer } = require('node:buffer');

const buf = Buffer.from([0, 0, 0, 5]);

console.log(buf.readInt32LE(0));
// Prints: 83886080
console.log(buf.readInt32LE(1));
// Throws ERR_OUT_OF_RANGE.