implement basic binary operators

Author: sokil

.gitignore

@@ -0,0 +1,3 @@
+nbproject
+.idea
+vendor

composer.json

@@ -0,0 +1,16 @@
+{
+    "name": "sokil/php-bitmap",
+    "description": "Working with bits",
+    "authors": [
+        {
+            "name": "Dmytro Sokil",
+            "email": "dmytro.sokil@gmail.com"
+        }
+    ],
+    "require": {},
+    "autoload": {
+        "psr-4": {
+            "Sokil\\": "src"
+        }
+    }
+}

src/Bitmap.php

@@ -11,8 +11,72 @@ public function __construct($bitmap = 0)
         $this->_bitmap = (int) $bitmap;
     }
 
-    public function isSet($index)
+    public function isBitSet($index)
     {
-        return 0 !== $this->_bitmap & (1 << $index);
+        return (bool) ($this->_bitmap & (1 << $index));
+    }
+    
+    public function setBit($index)
+    {
+        $this->_bitmap = $this->_bitmap | (1 << $index);
+        return $this;
+    }
+    
+    public function setBits(array $indexList)
+    {
+        $mask = 0;
+        foreach($indexList as $index) {
+            $mask = $mask | (1 << $index);
+        }
+        
+        $this->setBitsByMask($mask);
+        
+        return $this;
+    }
+    
+    public function setBitsByMask($mask)
+    {
+        $this->_bitmap = $this->_bitmap | $mask;
+        return $this;
+    }
+    
+    public function unsetBit($index)
+    {
+        $this->_bitmap = $this->_bitmap & ~(1 << $index);
+        return $this;
+    }
+    
+    public function unsetBits(array $indexList)
+    {
+        $mask = 0;
+        foreach($indexList as $index) {
+            $mask = $mask | (1 << $index);
+        }
+        
+        $this->unsetBitsByMask($mask);
+        
+        return $this;
+    }
+    
+    public function unsetBitsByMask($mask)
+    {
+        $this->_bitmap = $this->_bitmap & ~$mask;
+        return $this;
+    }
+    
+    public function invert()
+    {
+        $this->_bitmap = ~$this->_bitmap;
+        return $this;
+    }
+    
+    public function getInt()
+    {
+        return $this->_bitmap;
+    }
+    
+    public function getBinary()
+    {
+        return decbin($this->_bitmap);
     }
 }

tests/BitmapTest.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace Sokil;
+
+class BitmaskTest extends \PHPUnit_Framework_Testcase
+{
+    public function testIsBitSet()
+    {
+        // 5 => 101
+        $bitmap = new Bitmap(5);
+        
+        $this->assertTrue($bitmap->isBitSet(2));
+    }
+    
+    public function testSetBit()
+    {
+        $bitmap = new Bitmap();
+        
+        $this->assertEquals(8, $bitmap->setBit(3)->getInt());
+    }
+    
+    public function testSetBits()
+    {
+        $bitmap = new Bitmap();
+        
+        $this->assertEquals(10, $bitmap->setBits(array(1, 3))->getInt());
+    }
+    
+    public function testSetBitsByMask()
+    {
+        $bitmap = new Bitmap();
+        
+        $this->assertEquals(10, $bitmap->setBitsByMask(10)->getInt());
+    }
+    
+    public function testUnsetBit()
+    {
+        $bitmap = new Bitmap(5);
+        
+        $this->assertEquals(4, $bitmap->unsetBit(0)->getInt());
+    }
+    
+    public function testUnsetBits()
+    {
+        $bitmap = new Bitmap(5);
+        
+        $this->assertEquals(4, $bitmap->unsetBits(array(0, 1))->getInt());
+    }
+    
+    public function testUnsetBitsByMask()
+    {
+        $bitmap = new Bitmap(5);
+        
+        $this->assertEquals(1, $bitmap->unsetBitsByMask(4)->getInt());
+    }
+    
+    public function testInvert()
+    {
+        $bitmap = new Bitmap(5);
+        $bitmap->invert();
+        
+        $this->assertEquals(-6, $bitmap->getInt());
+    }
+    
+    public function testGetInt()
+    {
+        $bitmap = new Bitmap();
+        $bitmap->setBit(0);
+        $bitmap->setBit(2);
+        
+        $this->assertEquals(5, $bitmap->getInt());
+    }
+    
+    public function testBitmap()
+    {
+        $bitmap = new Bitmap();
+        $bitmap->setBit(0);
+        $bitmap->setBit(2);
+        
+        $this->assertEquals('101', $bitmap->getBinary());
+    }
+}

tests/bootstrap.php

@@ -0,0 +1,6 @@
+<?php
+
+/* @var $loader \Composer\Autoload\ClassLoader */
+$loader = require __DIR__ . "/../vendor/autoload.php";
+$loader->addPsr4('Sokil\\', __DIR__);
+

tests/phpunit.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<phpunit colors="true">
+    <testsuites>
+        <testsuite name="AllTests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <blacklist>
+            <file>../src/Exception.php</file>
+        </blacklist>
+    </filter>
+</phpunit>