buffercursor - npm Package Compare versions

Comparing version 0.0.3 to 0.0.4

buffercursor.js

@@ -22,4 +22,5 @@ // Copyright 2012 Timothy J Fontaine <[e-mail]>
 var assert = require('assert');
+var util = require('util');
 
-var BufferCursor = module.exports = function (buff) {
+var BufferCursor = module.exports = function(buff) {
   if (!(this instanceof BufferCursor))
@@ -33,8 +34,13 @@ return new BufferCursor(buff);
 
-BufferCursor.prototype._move = function (step) {
-  assert(this._pos + step <= this.buffer.length, "Cannot read beyond buffer");
+var BCO = BufferCursor.BufferCursorOverflow = function() {
+  Error.apply(this, Array.prototype.slice(arguments));
+};
+util.inherits(BCO, Error);
+
+BufferCursor.prototype._move = function(step) {
+  assert(this._pos + step <= this.buffer.length, 'Cannot read beyond buffer');
   this._pos += step;
 };
 
-BufferCursor.prototype._read = function (method, size) {
+BufferCursor.prototype._read = function(method, size) {
   var ret = this.buffer[method](this._pos);
@@ -45,3 +51,6 @@ this._move(size);
 
-BufferCursor.prototype._write = function (value, method, size) {
+BufferCursor.prototype._write = function(value, method, size) {
+  if (this._pos + size > this.length)
+    throw new BCO();
+
   this.buffer[method](value, this._pos);
@@ -51,13 +60,13 @@ this._move(size);
 
-BufferCursor.prototype.seek = function (pos) {
-  assert(pos >= 0, "Cannot seek behind 0");
-  assert(pos <= this.buffer.length, "Cannot seek beyond buffer length");
+BufferCursor.prototype.seek = function(pos) {
+  assert(pos >= 0, 'Cannot seek behind 0');
+  assert(pos <= this.buffer.length, 'Cannot seek beyond buffer length');
   this._pos = pos;
 };
 
-BufferCursor.prototype.eof = function () {
+BufferCursor.prototype.eof = function() {
   return this._pos == this.length;
 };
 
-BufferCursor.prototype.toByteArray = function (method) {
+BufferCursor.prototype.toByteArray = function(method) {
   var arr = [], i, part;
@@ -78,10 +87,11 @@
   }
+
   return arr;
 };
 
-BufferCursor.prototype.tell = function () {
+BufferCursor.prototype.tell = function() {
   return this._pos;
 };
 
-BufferCursor.prototype.slice = function (length) {
+BufferCursor.prototype.slice = function(length) {
   var end, b;
@@ -101,3 +111,3 @@
 
-BufferCursor.prototype.toString = function (encoding, length) {
+BufferCursor.prototype.toString = function(encoding, length) {
   var end, ret;
@@ -120,3 +130,3 @@
 
-BufferCursor.prototype.write = function (value, length, encoding) {
+BufferCursor.prototype.write = function(value, length, encoding) {
   var end, ret;
@@ -129,3 +139,3 @@
 
-BufferCursor.prototype.fill = function (value, length) {
+BufferCursor.prototype.fill = function(value, length) {
   var end;
@@ -147,7 +157,5 @@
     2: ['readUInt16BE', 'readUInt16LE', 'readInt16BE', 'readInt16LE'],
-    4: [
-        'readUInt32BE', 'readUInt32BE', 'readInt32BE', 'readInt32LE',
-        'readFloatBE', 'readFloatLE',
-       ],
-    8: ['readDoubleBE', 'readDoubleLE'],
+    4: ['readUInt32BE', 'readUInt32BE', 'readInt32BE', 'readInt32LE',
+        'readFloatBE', 'readFloatLE'],
+    8: ['readDoubleBE', 'readDoubleLE']
   },
@@ -157,15 +165,13 @@ writer: {
     2: ['writeUInt16BE', 'writeUInt16LE', 'writeInt16BE', 'writeInt16LE'],
-    4: [
-        'writeUInt32BE', 'writeUInt32BE', 'writeInt32BE', 'writeInt32LE',
-        'writeFloatBE', 'writeFloatLE',
-       ],
-    8: ['writeDoubleBE', 'writeDoubleBE'],
-  },
-}
+    4: ['writeUInt32BE', 'writeUInt32BE', 'writeInt32BE', 'writeInt32LE',
+        'writeFloatBE', 'writeFloatLE'],
+    8: ['writeDoubleBE', 'writeDoubleBE']
+  }
+};
 
-Object.keys(defs.reader).forEach(function (size) {
+Object.keys(defs.reader).forEach(function(size) {
   var arr = defs.reader[size];
   var move = parseInt(size);
-  arr.forEach(function (method) {
-    BufferCursor.prototype[method] = function () {
+  arr.forEach(function(method) {
+    BufferCursor.prototype[method] = function() {
       return this._read(method, move);
@@ -176,7 +182,7 @@ };
 
-Object.keys(defs.writer).forEach(function (size) {
+Object.keys(defs.writer).forEach(function(size) {
   var arr = defs.writer[size];
   var move = parseInt(size);
-  arr.forEach(function (method) {
-    BufferCursor.prototype[method] = function (value) {
+  arr.forEach(function(method) {
+    BufferCursor.prototype[method] = function(value) {
       return this._write(value, method, move);
@@ -183,0 +189,0 @@ };

package.json

 {
   "name": "buffercursor",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "author": "Timothy J Fontaine <[e-mail]> (http://atxconsulting.com)",
@@ -5,0 +5,0 @@ "description": "A simple way to traverse a Buffer like a cursor, updating position along the way",

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Improved metrics

Total package byte prevSize

6918

increased by2.64%

Lines of code

148

increased by2.07%

Number of high supply chain risk alerts

0

decreased by-100%

Worsened metrics

Number of medium supply chain risk alerts

1

increased byInfinity%

No dependency changes