function readInt64BEasFloat(buffer, offset) {
  var low = readInt32BE(buffer, offset + 4);
  var n = readInt32BE(buffer, offset) * 4294967296.0 + low;
  if (low < 0) n += 4294967296;
  return n;
}

var Int64 = require('node-int64');
function readInt64BEasFloat(buffer, offset) {
  var int64 = new Int64(buffer, offset);
  return int64.toNumber(true);
}