Node.JS Big-Endian UCS-2 [英] Node.JS Big-Endian UCS-2

问题描述

我正在使用Node.JS. Node的缓冲区支持little-endian UCS-2，但不支持big-endian ，我需要的。我该怎么做？

I'm working with Node.JS. Node's buffers support little-endian UCS-2, but not big-endian, which I need. How would I do so?

推荐答案

根据维基百科， UCS-2应该始终是big-endian ，所以奇怪的是节点只支持小端。您可以考虑提交错误。也就是说，切换endian-ness是相当直接的，因为它只是字节顺序的问题。所以只需交换字节就可以在小端和大端之间来回切换，如下所示：

According to wikipedia, UCS-2 should always be big-endian so it's odd that node only supports little endian. You might consider filing a bug. That said, switching endian-ness is fairly straight-forward since it's just a matter of byte order. So just swap bytes around to go back and forth between little and big endian, like so:

function swapBytes(buffer) {
  var l = buffer.length;
  if (l & 0x01) {
    throw new Error('Buffer length must be even');
  }
  for (var i = 0; i < l; i += 2) {
    var a = buffer[i];
    buffer[i] = buffer[i+1];
    buffer[i+1] = a;
  }
  return buffer; 
}

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