3 const statuses = require('../lib/statuses')
4 const supported = require('../lib/supported')
5 const browsers = require('./browsers').browsers
6 const versions = require('./browserVersions').browserVersions
8 const MATH2LOG = Math.log(2)
10 function unpackSupport(cipher) {
12 let stats = Object.keys(supported).reduce((list, support) => {
13 if (cipher & supported[support]) list.push(support)
18 let notes = cipher >> 7
21 let note = Math.floor(Math.log(notes) / MATH2LOG) + 1
22 notesArray.unshift(`#${note}`)
23 notes -= Math.pow(2, note - 1)
26 return stats.concat(notesArray).join(' ')
29 function unpackFeature(packed) {
30 let unpacked = { status: statuses[packed.B], title: packed.C }
31 unpacked.stats = Object.keys(packed.A).reduce((browserStats, key) => {
32 let browser = packed.A[key]
33 browserStats[browsers[key]] = Object.keys(browser).reduce(
35 let packedVersions = browser[support].split(' ')
36 let unpacked2 = unpackSupport(support)
37 packedVersions.forEach(v => (stats[versions[v]] = unpacked2))
47 module.exports = unpackFeature
48 module.exports.default = unpackFeature