buf.swap16()
- 返回: <Buffer>
buf
的引用。
将 buf
解释为无符号 16 位整数数组,并就地交换字节顺序。
如果 buf.length
不是 2 的倍数,则抛出 ERR_INVALID_BUFFER_SIZE
。
const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
console.log(buf1);
// 打印: <Buffer 01 02 03 04 05 06 07 08>
buf1.swap16();
console.log(buf1);
// 打印: <Buffer 02 01 04 03 06 05 08 07>
const buf2 = Buffer.from([0x1, 0x2, 0x3]);
buf2.swap16();
// 抛出 ERR_INVALID_BUFFER_SIZE。
buf.swap16()
的一种方便用法是在 UTF-16 小端序和 UTF-16 大端序之间执行快速就地转换:
const buf = Buffer.from('This is little-endian UTF-16', 'utf16le');
buf.swap16(); // 转换为大端序 UTF-16 文本。
- Returns: <Buffer> A reference to
buf
.
Interprets buf
as an array of unsigned 16-bit integers and swaps the
byte order in-place. Throws ERR_INVALID_BUFFER_SIZE
if buf.length
is not a multiple of 2.
const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
console.log(buf1);
// Prints: <Buffer 01 02 03 04 05 06 07 08>
buf1.swap16();
console.log(buf1);
// Prints: <Buffer 02 01 04 03 06 05 08 07>
const buf2 = Buffer.from([0x1, 0x2, 0x3]);
buf2.swap16();
// Throws ERR_INVALID_BUFFER_SIZE.
One convenient use of buf.swap16()
is to perform a fast in-place conversion
between UTF-16 little-endian and UTF-16 big-endian:
const buf = Buffer.from('This is little-endian UTF-16', 'utf16le');
buf.swap16(); // Convert to big-endian UTF-16 text.