Rolled back classical classes for SeaArray & SafeBuffer

sea.js

@@ -51,24 +51,26 @@
     global.sessionStorage = sessionStorage
     global.localStorage = localStorage
   }
+
   // This is Array extended to have .toString(['utf8'|'hex'|'base64'])
-  class SeaArray extends Array {
-    toString(enc = 'utf8', start = 0, end) {
-      const { length } = this
-      if (enc === 'hex') {
-        const buf = new Uint8Array(this)
-        return [ ...Array(((end && (end + 1)) || length) - start).keys()]
-        .map((i) => buf[ i + start ].toString(16).padStart(2, '0')).join('')
-      }
-      if (enc === 'utf8') {
-        return Array.from(
-          { length: (end || length) - start },
-          (_, i) => String.fromCharCode(this[ i + start])
-        ).join('')
-      }
-      if (enc === 'base64') {
-        return btoa(this)
-      }
+  function SeaArray() {}
+  Object.assign(SeaArray, { from: Array.from })
+  SeaArray.prototype = Object.create(Array.prototype)
+  SeaArray.prototype.toString = function(enc = 'utf8', start = 0, end) {
+    const { length } = this
+    if (enc === 'hex') {
+      const buf = new Uint8Array(this)
+      return [ ...Array(((end && (end + 1)) || length) - start).keys()]
+      .map((i) => buf[ i + start ].toString(16).padStart(2, '0')).join('')
+    }
+    if (enc === 'utf8') {
+      return Array.from(
+        { length: (end || length) - start },
+        (_, i) => String.fromCharCode(this[ i + start])
+      ).join('')
+    }
+    if (enc === 'base64') {
+      return btoa(this)
     }
   }
 
@@ -77,14 +79,14 @@
   // between binary and 'hex' | 'utf8' | 'base64'
   // See documentation and validation for safe implementation in:
   // https://github.com/feross/safe-buffer#update
-  class SafeBuffer extends SeaArray {
-    constructor(...props) {
-      super()
-      this.from = SafeBuffer.from
-      return SafeBuffer.from(...props)
-    }
+  function SafeBuffer(...props) {
+    console.warn('new SafeBuffer() is depreciated, please use SafeBuffer.from()')
+    return SafeBuffer.from(...props)
+  }
+  SafeBuffer.prototype = Object.create(Array.prototype)
+  Object.assign(SafeBuffer, {
     // (data, enc) where typeof data === 'string' then enc === 'utf8'|'hex'|'base64'
-    static from() {
+    from() {
       if (!Object.keys(arguments).length) {
         throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
       }
@@ -102,13 +104,13 @@
         } else if (enc === 'utf8') {
           const { length } = input
           const words = new Uint16Array(length)
-          SeaArray.from({ length }, (_, i) => words[i] = input.charCodeAt(i))
+          Array.from({ length }, (_, i) => words[i] = input.charCodeAt(i))
           buf = SeaArray.from(words)
         } else if (enc === 'base64') {
           const dec = atob(input)
           const { length } = dec
           const bytes = new Uint8Array(length)
-          SeaArray.from({ length }, (_, i) => bytes[i] = dec.charCodeAt(i))
+          Array.from({ length }, (_, i) => bytes[i] = dec.charCodeAt(i))
           buf = SeaArray.from(bytes)
         } else if (enc === 'binary') {
           buf = SeaArray.from(input)
@@ -125,23 +127,25 @@
         }
         return SeaArray.from(buf || input)
       }
-    }
+    },
     // This is 'safe-buffer.alloc' sans encoding support
-    static alloc(length, fill = 0 /*, enc*/ ) {
+    alloc(length, fill = 0 /*, enc*/ ) {
       return SeaArray.from(new Uint8Array(Array.from({ length }, () => fill)))
-    }
+    },
     // This is normal UNSAFE 'buffer.alloc' or 'new Buffer(length)' - don't use!
-    static allocUnsafe(length) {
+    allocUnsafe(length) {
       return SeaArray.from(new Uint8Array(Array.from({ length })))
-    }
+    },
     // This puts together array of array like members
-    static concat(arr) { // octet array
+    concat(arr) { // octet array
       if (!Array.isArray(arr)) {
         throw new TypeError('First argument must be Array containing ArrayBuffer or Uint8Array instances.')
       }
       return SeaArray.from(arr.reduce((ret, item) => ret.concat(Array.from(item)), []))
     }
-  }
+  })
+  SafeBuffer.prototype.from = SafeBuffer.from
+  SafeBuffer.prototype.toString = SeaArray.prototype.toString
 
   const Buffer = SafeBuffer