buf.readInt32LE(offset)


  • offset <integer> 开始读取的偏移量。必须满足0 <= offset <= buf.length - 4
  • 返回: <integer>

用指定的字节序格式(readInt32BE() 返回大端序,readInt32LE() 返回小端序)从 buf 中指定的 offset 读取一个有符号的 32 位整数值。

Buffer 中读取的整数值会被解析为二进制补码值。

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

console.log(buf.readInt32BE(0));
// 输出: 5
console.log(buf.readInt32LE(0));
// 输出: 83886080
console.log(buf.readInt32LE(1));
// 抛出异常 ERR_OUT_OF_RANGE。
  • offset <integer> Number of bytes to skip before starting to read. Must satisfy 0 <= offset <= buf.length - 4.
  • Returns: <integer>

Reads a signed 32-bit integer from buf at the specified offset with the specified endian format (readInt32BE() returns big endian, readInt32LE() returns little endian).

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

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

console.log(buf.readInt32BE(0));
// Prints: 5
console.log(buf.readInt32LE(0));
// Prints: 83886080
console.log(buf.readInt32LE(1));
// Throws ERR_OUT_OF_RANGE