libbase64 - npm Package Compare versions

Comparing version 1.0.3 to 1.1.0

lib/libbase64.js

@@ -71,3 +71,2 @@ 'use strict';
         super();
-
         // init Transform
@@ -80,2 +79,5 @@ this.options = options || {};
 
+        this.skipStartBytes = this.options.skipStartBytes || 0;
+        this.limitOutbutBytes = this.options.limitOutbutBytes || 0;
+
         this._curLine = '';
@@ -88,2 +90,29 @@ this._remainingBytes = false;
 
+    _writeChunk(chunk /*, isFinal */) {
+        if (this.skipStartBytes) {
+            if (chunk.length <= this.skipStartBytes) {
+                this.skipStartBytes -= chunk.length;
+                return;
+            }
+
+            chunk = chunk.slice(this.skipStartBytes);
+            this.skipStartBytes = 0;
+        }
+
+        if (this.limitOutbutBytes) {
+            if (this.outputBytes + chunk.length <= this.limitOutbutBytes) {
+                // ignore, can use entire chunk
+            } else if (this.outputBytes >= this.limitOutbutBytes) {
+                // chunks already processed
+                return;
+            } else {
+                // use partial chunk
+                chunk = chunk.slice(0, this.limitOutbutBytes - this.outputBytes);
+            }
+        }
+
+        this.outputBytes += chunk.length;
+        this.push(chunk);
+    }
+
     _transform(chunk, encoding, done) {
@@ -106,4 +135,4 @@ if (encoding !== 'buffer') {
         if (chunk.length % 3) {
-            this._remainingBytes = chunk.slice(chunk.length - chunk.length % 3);
-            chunk = chunk.slice(0, chunk.length - chunk.length % 3);
+            this._remainingBytes = chunk.slice(chunk.length - (chunk.length % 3));
+            chunk = chunk.slice(0, chunk.length - (chunk.length % 3));
         } else {
@@ -132,4 +161,3 @@ this._remainingBytes = false;
         if (b64) {
-            this.outputBytes += b64.length;
-            this.push(Buffer.from(b64, 'ascii'));
+            this._writeChunk(Buffer.from(b64, 'ascii'), false);
         }
@@ -144,9 +172,9 @@
         }
+
         if (this._curLine) {
             this._curLine = wrap(this._curLine, this.options.lineLength);
-            this.outputBytes += this._curLine.length;
-            this.push(Buffer.from(this._curLine, 'ascii'));
+            this._writeChunk(Buffer.from(this._curLine, 'ascii'), true);
             this._curLine = '';
         }
-        setImmediate(done);
+        done();
     }
@@ -153,0 +181,0 @@ }

package.json

 {
     "name": "libbase64",
-    "version": "1.0.3",
+    "version": "1.1.0",
     "description": "Encode and decode base64 encoded strings",
@@ -24,11 +24,12 @@ "main": "lib/libbase64.js",
     "devDependencies": {
-        "chai": "^4.1.2",
+        "chai": "^4.2.0",
         "eslint-config-nodemailer": "^1.2.0",
-        "grunt": "^1.0.3",
-        "grunt-cli": "^1.2.0",
-        "grunt-eslint": "^21.0.0",
+        "eslint-config-prettier": "^6.0.0",
+        "grunt": "^1.0.4",
+        "grunt-cli": "^1.3.2",
+        "grunt-eslint": "^22.0.0",
         "grunt-mocha-test": "^0.13.3",
-        "mocha": "^5.2.0"
+        "mocha": "^6.2.0"
     },
     "dependencies": {}
 }

README.md

@@ -25,3 +25,3 @@ # libbase64
 
-* **val** is a Buffer or an unicode string
+-   **val** is a Buffer or an unicode string
 
@@ -43,4 +43,4 @@ **Example**
 
-* **str** is a base64 encoded string
-* **lineLength** (defaults to 76) is the maximum allowed line length
+-   **str** is a base64 encoded string
+-   **lineLength** (defaults to 76) is the maximum allowed line length
 
@@ -68,4 +68,7 @@ **Example**
 
-* **options** is the optional stream options object with an additional option `lineLength` if you want to use any other line length than the default 76
-  characters (or set to `false` to turn the soft wrapping off completely)
+-   **options** is the optional stream options object
+-   **options.lineLength** (Number) if you want to use any other line length than the default 76
+    characters (or set to `false` to turn the soft wrapping off completely)
+-   **options.skipStartBytes** (Number) Optional. How many bytes to skip from output (default to 0)
+-   **options.limitOutbutBytes** (Number) Optional. How many bytes to return (defaults to all bytes)
 
@@ -94,3 +97,3 @@ **Example**
 
-* **options** is the optional stream options object
+-   **options** is the optional stream options object
 
@@ -97,0 +100,0 @@ **Example**

No alert changes

Improved metrics

Total package byte prevSize

11176

increased by14.58%

Number of package files

6

increased by20%

Lines of code

208

increased by15.56%

Number of lines in readme file

113

increased by2.73%

Worsened metrics

Dev dependency count

8

increased by14.29%

No dependency changes