big-rat/lib/bn-to-num.js

A big integer rational number

'use strict'

var sign = require('./bn-sign')

module.exports = bn2num

//TODO: Make this better
function bn2num(b) {
  var l = b.length
  var words = b.words
  var out = 0
  if (l === 1) {
    out = words[0]
  } else if (l === 2) {
    out = words[0] + (words[1] * 0x4000000)
  } else {
    for (var i = 0; i < l; i++) {
      var w = words[i]
      out += w * Math.pow(0x4000000, i)
    }
  }
  return sign(b) * out
}