/**
 * An abstraction for slicing an arraybuffer even when
 * ArrayBuffer.prototype.slice is not supported
 *
 * @api public
 */

module.exports = function(arraybuffer, start, end) {
 var bytes = arraybuffer.byteLength;
 start = start || 0;
 end = end || bytes;

 if (arraybuffer.slice) { return arraybuffer.slice(start, end); }

 if (start < 0) { start += bytes; }
 if (end < 0) { end += bytes; }
 if (end > bytes) { end = bytes; }

 if (start >= bytes || start >= end || bytes === 0) {
 return new ArrayBuffer(0);
 }

 var abv = new Uint8Array(arraybuffer);
 var result = new Uint8Array(end - start);
 for (var i = start, ii = 0; i < end; i++, ii++) {
 result[ii] = abv[i];
 }
 return result.buffer;
};