ieee754-buffer - npm Package Compare versions

Comparing version 1.0.0 to 1.0.1

CHANGELOG.md

 # CHANGELOG
 
+## 1.0.1 - 2019-12-31
+- Fix: rounding byte values must work the same on all browsers
+
 ## 1.0.0 - 2019-12-30
@@ -4,0 +7,0 @@ - New package structure:

dist/ieee754-buffer.js

@@ -1,4 +0,4 @@
-(function(h,g){"object"===typeof exports&&"undefined"!==typeof module?g(exports):"function"===typeof define&&define.amd?define(["exports"],g):(h=h||self,g(h.IEEE754Buffer={}))})(this,function(h){var g=function(f,a){this.ebits=f;this.fbits=a;this.bias=(1<<f-1)-1;this.numBytes=Math.ceil((f+a)/8);this.biasP2=Math.pow(2,this.bias+1);this.ebitsFbits=f+a;this.fbias=Math.pow(2,-(8*this.numBytes-1-f))};g.prototype.pack=function(f,a,e){Math.abs(a)>this.biasP2-2*this.ebitsFbits&&(a=0>a?-Infinity:Infinity);
-var d=0>((a=+a)||1/a)?1:0>a?1:0;a=Math.abs(a);var c=Math.min(Math.floor(Math.log(a)/Math.LN2),1023),b=Math.round(a/Math.pow(2,c)*Math.pow(2,this.fbits));a!==a?(b=Math.pow(2,this.fbits-1),c=(1<<this.ebits)-1):0!==a&&(a>=Math.pow(2,1-this.bias)?(2<=b/Math.pow(2,this.fbits)&&(c+=1,b=1),c>this.bias?(c=(1<<this.ebits)-1,b=0):(c+=this.bias,b=Math.round(b)-Math.pow(2,this.fbits))):(b=Math.round(a/Math.pow(2,1-this.bias-this.fbits)),c=0));return this.packFloatBits_(f,e,d,c,b)};g.prototype.unpack=function(f,
-a){for(var e=(1<<this.ebits)-1,d="",c=this.numBytes-1;0<=c;c--){var b=f[c+a].toString(2);d+="00000000".substring(b.length)+b}c="1"==d.charAt(0)?-1:1;d=d.substring(1);b=parseInt(d.substring(0,this.ebits),2);d=d.substring(this.ebits);if(b==e)return 0!==parseInt(d,2)?NaN:Infinity*c;0===b?(b+=1,e=parseInt(d,2)):e=parseInt("1"+d,2);return c*e*this.fbias*Math.pow(2,b-this.bias)};g.prototype.packFloatBits_=function(f,a,e,d,c){var b=[];b.push(e);for(e=this.ebits;0<e;--e)b[e]=d%2?1:0,d=Math.floor(d/2);d=b.length;
-for(e=this.fbits;0<e;--e)b[d+e]=c%2?1:0,c=Math.floor(c/2);c=b.join("");b=this.numBytes+a-1;for(d=a;b>=a;)f[b]=parseInt(c.substring(0,8),2),c=c.substring(8),b--,d++;return d};h.IEEE754Buffer=g;Object.defineProperty(h,"__esModule",{value:!0})});
+(function(h,g){"object"===typeof exports&&"undefined"!==typeof module?g(exports):"function"===typeof define&&define.amd?define(["exports"],g):(h=h||self,g(h.IEEE754Buffer={}))})(this,function(h){function g(e){var a=Math.floor(e);e-=a;return.5>e?a:.5<e?a+1:a%2?a+1:a}var k=function(e,a){this.ebits=e;this.fbits=a;this.bias=(1<<e-1)-1;this.numBytes=Math.ceil((e+a)/8);this.biasP2=Math.pow(2,this.bias+1);this.ebitsFbits=e+a;this.fbias=Math.pow(2,-(8*this.numBytes-1-e))};k.prototype.pack=function(e,a,f){Math.abs(a)>
+this.biasP2-2*this.ebitsFbits&&(a=0>a?-Infinity:Infinity);var d=0>((a=+a)||1/a)?1:0>a?1:0;a=Math.abs(a);var c=Math.min(Math.floor(Math.log(a)/Math.LN2),1023),b=g(a/Math.pow(2,c)*Math.pow(2,this.fbits));a!==a?(b=Math.pow(2,this.fbits-1),c=(1<<this.ebits)-1):0!==a&&(a>=Math.pow(2,1-this.bias)?(2<=b/Math.pow(2,this.fbits)&&(c+=1,b=1),c>this.bias?(c=(1<<this.ebits)-1,b=0):(c+=this.bias,b=g(b)-Math.pow(2,this.fbits))):(b=g(a/Math.pow(2,1-this.bias-this.fbits)),c=0));return this.packFloatBits_(e,f,d,c,
+b)};k.prototype.unpack=function(e,a){for(var f=(1<<this.ebits)-1,d="",c=this.numBytes-1;0<=c;c--){var b=e[c+a].toString(2);d+="00000000".substring(b.length)+b}c="1"==d.charAt(0)?-1:1;d=d.substring(1);b=parseInt(d.substring(0,this.ebits),2);d=d.substring(this.ebits);if(b==f)return 0!==parseInt(d,2)?NaN:Infinity*c;0===b?(b+=1,f=parseInt(d,2)):f=parseInt("1"+d,2);return c*f*this.fbias*Math.pow(2,b-this.bias)};k.prototype.packFloatBits_=function(e,a,f,d,c){var b=[];b.push(f);for(f=this.ebits;0<f;--f)b[f]=
+d%2?1:0,d=Math.floor(d/2);d=b.length;for(f=this.fbits;0<f;--f)b[d+f]=c%2?1:0,c=Math.floor(c/2);c=b.join("");b=this.numBytes+a-1;for(d=a;b>=a;)e[b]=parseInt(c.substring(0,8),2),c=c.substring(8),b--,d++;return d};h.IEEE754Buffer=k;Object.defineProperty(h,"__esModule",{value:!0})});

index.js

@@ -108,3 +108,3 @@ /*
     /** @type {number} */
-    let fraction = Math.round(num / Math.pow(2, exp) * Math.pow(2, this.fbits));
+    let fraction = roundToEven(num / Math.pow(2, exp) * Math.pow(2, this.fbits));
     // NaN
@@ -127,6 +127,6 @@ if (num !== num) {
           exp = exp + this.bias;
-          fraction = Math.round(fraction) - Math.pow(2, this.fbits);
+          fraction = roundToEven(fraction) - Math.pow(2, this.fbits);
         }
       } else {
-        fraction = Math.round(num / Math.pow(2, 1 - this.bias - this.fbits));
+        fraction = roundToEven(num / Math.pow(2, 1 - this.bias - this.fbits));
         exp = 0;
@@ -221,1 +221,20 @@ }
 }
+
+/**
+ * Round a number to its nearest even value.
+ * @param {number} n The number.
+ * @return {number}
+ * @private
+ */
+function roundToEven(n) {
+  /** @type {number} */
+  let w = Math.floor(n);
+  let f = n - w;
+  if (f < 0.5) {
+    return w;
+  }
+  if (f > 0.5) {
+    return w + 1;
+  }
+  return w % 2 ? w + 1 : w;
+}

package.json

 {
   "name": "ieee754-buffer",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "A module to encode and decode IEEE 754 floating point numbers.",
@@ -5,0 +5,0 @@ "homepage": "https://github.com/rochars/ieee754-buffer",

Fixed alerts

Major refactor

Supply chain risk

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

19993

increased by2.43%

Lines of code

272

increased by7.51%

Number of medium supply chain risk alerts

0

decreased by-100%

No dependency changes