updateNumber now takes arguments object to allow significand override

Author: bartaz

lib/bits.js

@@ -78,18 +78,28 @@ function classNamesToBinaryString( binaryString, bitSpan ) {
     return binaryString;
 }
 
-function updateNumber( exponent ) {
+function updateNumber( values ) {
     var b = "";
 
+    var exponent, significand;
+    if (values) {
+        exponent = values.exponent;
+        significand = values.significand;
+    }
+
     if (typeof exponent == "number") {
         exponent = ieee754.intToBinaryString( exponent, 11 );
     } else {
         exponent = bitsExponent.reduce( classNamesToBinaryString, "" );
     }
 
+    if (typeof significand != "string") {
+        significand = bitsSignificand.reduce( classNamesToBinaryString, "" );
+    }
+
     b += bitsSign.reduce( classNamesToBinaryString, "" );
     b += exponent;
-    b += bitsSignificand.reduce( classNamesToBinaryString, "" );
+    b += significand;
 
     var f = ieee754.binaryStringToFloat64( b );
     setNumberInputValue( f );
@@ -259,7 +269,7 @@ numberInput.addEventListener("keydown", function ( event ) {
 
 pointSlider.addEventListener( "change", function() {
     var exponent = Number(pointSlider.value);
-    updateNumber( exponent );
+    updateNumber( { exponent: exponent } );
 }, false);
 
 pointSlider.addEventListener( "click", function() {
@@ -339,7 +349,7 @@ function getCurrentExponentValue() {
 
 function updateExponentValue( value ) {
     var exponent = Number(value);
-    updateNumber( exponent );
+    updateNumber( { exponent: exponent } );
 }
 dynks( exponentElement, getCurrentExponentValue, updateExponentValue );
 
@@ -349,7 +359,7 @@ function getCurrentExponentNormalizedValue() {
 
 function updateExponentNormalizedValue( value ) {
     var exponent = Number(value);
-    updateNumber( exponent + 1023 );
+    updateNumber( { exponent: exponent + 1023 } );
 }
 dynks( exponentNormalizedElement, getCurrentExponentNormalizedValue, updateExponentNormalizedValue );
 
@@ -378,6 +388,8 @@ document.addEventListener("keyup", function( event ){
                   break;
         case "S": visualization.classList.toggle("show-significand-overflow");
                   break;
+        case "X": updateNumber( { significand: "1111111111111111111111111111111111111111111111111111"} );
+                  break;
         case "E": visualization.classList.remove( "expanded" );
                   visualization.classList.add( "final" );
                   break;