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Converted SeaArray to ES6 class & some cleanup

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This commit is contained in:
mhelander 2018-02-03 15:44:17 +02:00
parent 5f29bd5a54
commit a5bb0716c3
1 changed files with 20 additions and 22 deletions
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14
sea.js
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@ -52,10 +52,8 @@
global.localStorage = localStorage global.localStorage = localStorage
} }
// This is Array extended to have .toString(['utf8'|'hex'|'base64']) // This is Array extended to have .toString(['utf8'|'hex'|'base64'])
function SeaArray() {} class SeaArray extends Array {
Object.assign(SeaArray, { from: Array.from }) toString(enc = 'utf8', start = 0, end) {
SeaArray.prototype = Object.create(Array.prototype)
SeaArray.prototype.toString = function(enc = 'utf8', start = 0, end) {
const { length } = this const { length } = this
if (enc === 'hex') { if (enc === 'hex') {
const buf = new Uint8Array(this) const buf = new Uint8Array(this)
@ -72,6 +70,7 @@
return btoa(this) return btoa(this)
} }
} }
}
// This is Buffer implementation used in SEA. Functionality is mostly // This is Buffer implementation used in SEA. Functionality is mostly
// compatible with NodeJS 'safe-buffer' and is used for encoding conversions // compatible with NodeJS 'safe-buffer' and is used for encoding conversions
@ -82,7 +81,7 @@
console.warn('new SafeBuffer() is depreciated, please use SafeBuffer.from()') console.warn('new SafeBuffer() is depreciated, please use SafeBuffer.from()')
return SafeBuffer.from(...props) return SafeBuffer.from(...props)
} }
SafeBuffer.prototype = Object.create(Array.prototype) SafeBuffer.prototype = Object.create(SeaArray.prototype)
Object.assign(SafeBuffer, { Object.assign(SafeBuffer, {
// (data, enc) where typeof data === 'string' then enc === 'utf8'|'hex'|'base64' // (data, enc) where typeof data === 'string' then enc === 'utf8'|'hex'|'base64'
from() { from() {
@ -103,13 +102,13 @@
} else if (enc === 'utf8') { } else if (enc === 'utf8') {
const { length } = input const { length } = input
const words = new Uint16Array(length) const words = new Uint16Array(length)
Array.from({ length }, (_, i) => words[i] = input.charCodeAt(i)) SeaArray.from({ length }, (_, i) => words[i] = input.charCodeAt(i))
buf = SeaArray.from(words) buf = SeaArray.from(words)
} else if (enc === 'base64') { } else if (enc === 'base64') {
const dec = atob(input) const dec = atob(input)
const { length } = dec const { length } = dec
const bytes = new Uint8Array(length) const bytes = new Uint8Array(length)
Array.from({ length }, (_, i) => bytes[i] = dec.charCodeAt(i)) SeaArray.from({ length }, (_, i) => bytes[i] = dec.charCodeAt(i))
buf = SeaArray.from(bytes) buf = SeaArray.from(bytes)
} else if (enc === 'binary') { } else if (enc === 'binary') {
buf = SeaArray.from(input) buf = SeaArray.from(input)
@ -144,7 +143,6 @@
} }
}) })
SafeBuffer.prototype.from = SafeBuffer.from SafeBuffer.prototype.from = SafeBuffer.from
SafeBuffer.prototype.toString = SeaArray.prototype.toString
const Buffer = SafeBuffer const Buffer = SafeBuffer