1/**
 2 * An abstraction for slicing an arraybuffer even when
 3 * ArrayBuffer.prototype.slice is not supported
 4 *
 5 * @api public
 6 */
 7
 8module.exports = function(arraybuffer, start, end) {
 9  var bytes = arraybuffer.byteLength;
10  start = start || 0;
11  end = end || bytes;
12
13  if (arraybuffer.slice) { return arraybuffer.slice(start, end); }
14
15  if (start < 0) { start += bytes; }
16  if (end < 0) { end += bytes; }
17  if (end > bytes) { end = bytes; }
18
19  if (start >= bytes || start >= end || bytes === 0) {
20    return new ArrayBuffer(0);
21  }
22
23  var abv = new Uint8Array(arraybuffer);
24  var result = new Uint8Array(end - start);
25  for (var i = start, ii = 0; i < end; i++, ii++) {
26    result[ii] = abv[i];
27  }
28  return result.buffer;
29};