You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.3 KiB
48 lines
1.3 KiB
'use strict' |
|
|
|
const statuses = require('../lib/statuses') |
|
const supported = require('../lib/supported') |
|
const browsers = require('./browsers').browsers |
|
const versions = require('./browserVersions').browserVersions |
|
|
|
const MATH2LOG = Math.log(2) |
|
|
|
function unpackSupport(cipher) { |
|
// bit flags |
|
let stats = Object.keys(supported).reduce((list, support) => { |
|
if (cipher & supported[support]) list.push(support) |
|
return list |
|
}, []) |
|
|
|
// notes |
|
let notes = cipher >> 7 |
|
let notesArray = [] |
|
while (notes) { |
|
let note = Math.floor(Math.log(notes) / MATH2LOG) + 1 |
|
notesArray.unshift(`#${note}`) |
|
notes -= Math.pow(2, note - 1) |
|
} |
|
|
|
return stats.concat(notesArray).join(' ') |
|
} |
|
|
|
function unpackFeature(packed) { |
|
let unpacked = { status: statuses[packed.B], title: packed.C } |
|
unpacked.stats = Object.keys(packed.A).reduce((browserStats, key) => { |
|
let browser = packed.A[key] |
|
browserStats[browsers[key]] = Object.keys(browser).reduce( |
|
(stats, support) => { |
|
let packedVersions = browser[support].split(' ') |
|
let unpacked2 = unpackSupport(support) |
|
packedVersions.forEach(v => (stats[versions[v]] = unpacked2)) |
|
return stats |
|
}, |
|
{} |
|
) |
|
return browserStats |
|
}, {}) |
|
return unpacked |
|
} |
|
|
|
module.exports = unpackFeature |
|
module.exports.default = unpackFeature
|
|
|