buf.writeUInt32LE(value, offset)


  • value <integer> 要写入 buf 的数值。
  • offset <integer> 开始写入的偏移量。必须满足0 <= offset <= buf.length - 4
  • 返回: <integer> offset 加上已写入的字节数。

用指定的字节序格式(writeUInt32BE() 写入大端序, writeUInt32LE() 写入小端序)将 value 写入到 buf 中指定的 offset 位置。 value 必须是无符号的 32 位整数。

const buf = Buffer.allocUnsafe(4);

buf.writeUInt32BE(0xfeedface, 0);

console.log(buf);
// 输出: <Buffer fe ed fa ce>

buf.writeUInt32LE(0xfeedface, 0);

console.log(buf);
// 输出: <Buffer ce fa ed fe>
  • value <integer> Number to be written to buf.
  • offset <integer> Number of bytes to skip before starting to write. Must satisfy 0 <= offset <= buf.length - 4.
  • Returns: <integer> offset plus the number of bytes written.

Writes value to buf at the specified offset with specified endian format (writeUInt32BE() writes big endian, writeUInt32LE() writes little endian). value should be a valid unsigned 32-bit integer. Behavior is undefined when value is anything other than an unsigned 32-bit integer.

const buf = Buffer.allocUnsafe(4);

buf.writeUInt32BE(0xfeedface, 0);

console.log(buf);
// Prints: <Buffer fe ed fa ce>

buf.writeUInt32LE(0xfeedface, 0);

console.log(buf);
// Prints: <Buffer ce fa ed fe>