#84 WIP convert to binary instead of to utf8

src/BufferStream.js

@@ -1,36 +1,18 @@
-//http://jonisalonen.com/2012/from-utf-16-to-utf-8-in-javascript/
-function toUTF8Array(str) {
-    var utf8 = [];
-    for (var i = 0; i < str.length; i++) {
-        var charcode = str.charCodeAt(i);
-        if (charcode < 0x80) utf8.push(charcode);
-        else if (charcode < 0x800) {
-            utf8.push(0xc0 | (charcode >> 6), 0x80 | (charcode & 0x3f));
-        } else if (charcode < 0xd800 || charcode >= 0xe000) {
-            utf8.push(
-                0xe0 | (charcode >> 12),
-                0x80 | ((charcode >> 6) & 0x3f),
-                0x80 | (charcode & 0x3f)
-            );
-        }
-        // surrogate pair
-        else {
-            i++;
-            // UTF-16 encodes 0x10000-0x10FFFF by
-            // subtracting 0x10000 and splitting the
-            // 20 bits of 0x0-0xFFFFF into two halves
-            charcode =
-                0x10000 +
-                (((charcode & 0x3ff) << 10) | (str.charCodeAt(i) & 0x3ff));
-            utf8.push(
-                0xf0 | (charcode >> 18),
-                0x80 | ((charcode >> 12) & 0x3f),
-                0x80 | ((charcode >> 6) & 0x3f),
-                0x80 | (charcode & 0x3f)
-            );
-        }
-    }
-    return utf8;
+/**
+ * Converts input into a binary/latin1-encoded array
+ * @param {*} str
+ * @return {Number[]}
+ */
+function toBinaryArray(str) {
+    if (typeof str === "number") {
+        // somehow numbers are passed into here from the reader
+        str = str.toString();
+    }
+    if (typeof str !== "string") {
+        // just in case there are other non-strings passed in
+        return [];
+    }
+    return str.split("").map(char => char.charCodeAt(0)); // split and map to char code
 }
 
 function toInt(val) {
@@ -118,13 +100,13 @@ class BufferStream {
 
     writeString(value) {
         value = value || "";
-        var utf8 = toUTF8Array(value),
-            bytelen = utf8.length;
+        var bin = toBinaryArray(value),
+            bytelen = bin.length;
 
         this.checkSize(bytelen);
         var startOffset = this.offset;
         for (var i = 0; i < bytelen; i++) {
-            this.view.setUint8(startOffset, utf8[i]);
+            this.view.setUint8(startOffset, bin[i]);
             startOffset++;
         }
         return this.increment(bytelen);