Windows could not start the Windows Search on Local Computer.  For more information, review the System Event Log.  If this is a non-Microsoft service, contact the service vendor, and refer to service-specific error code – 2147218141.

I went to event viewer, I saw some warnings as:

Event ID 1008: The Windows Search Service is attempting to remove the old catalog.

Event ID 1010: The Windows Search Service has successfully removed the old catalog.

Event ID 1013: Windows Search Service stopped normally.

I searched on internet via google, and a lot of reports on this error, the solution in Windows Vista Forums may resolve some people’s issue, but doesn’t work for me.

Eventually my solution is simple and easy:

1. Select Windows Search 4.0 from your installed updates. You may open your control panel and search for the panels as pictures below. I like this feature in Vista.

2. Uninstall the Windows Search 4.0 and restart. Open “Indexing Options”, you may find the windows search is back

3. If you want to re-install the Windows Search, Download Windows Search 4.0 here!

Good luck!

Either way you would have to use SubInAcl. Download it from microsoft.com
This tool allows us to edit registry entries even those which you need special rights for.
We will make simple files, depending on the application you need to fix, with code that will fix your registry entries.
1. Download and install SubinAcl.
2. Locate the install folder (default is Program Files/Windows Resource Kits/Tools/)
3. Open Notepad
4. Add the lines you need for your applications (you can find the lines bellow)
5. Save the file as "Officefix.cmd" in the folder where you found SubinAcl.
6. Open the officefix.cmd

I didn’t found the lines of code that “you can find the lines bellow”. Here is the script I used and it works:

subinacl /subkeyreg HKEY_LOCAL_MACHINE /grant=administrators=f /grant=system=f
subinacl /subkeyreg HKEY_CURRENT_USER /grant=administrators=f /grant=system=f
subinacl /subkeyreg HKEY_CLASSES_ROOT /grant=administrators=f /grant=system=f
subinacl /subdirectories %SystemDrive% /grant=administrators=f /grant=system=f
subinacl /subdirectories %windir%*.* /grant=administrators=f /grant=system=f
secedit /configure /cfg %windir%infdefltbase.inf /db defltbase.sdb /verbose

· If you drone endlessly with details, you don’t see the forest from the trees.

· If you don’t use multiple views, you are likely to miss important aspects of the solution

· If you aren’t focused on quality attributes, then you are most likely documenting design and not architecture

· And if you don’t explain the rationale,  then the document doesn’t have a lot of added value beyond the code itself

In the column “Watch in Windows”, I put what I can see from the watch window in Visual Studio 2008 (Visual C++ Environment).

After I finished my post How to format source code in your blog, I decided to make a small tool for anyone who post source code file on Internet. I called this tool “LibG Code Viewer“, it used the method I described in my previous blog. Here is the usage of this tool:

Below is the list of supported language and sample:

You can use the form below to test LibG Code Viewer:

SyntaxHighlighter is a pure JavaScript based tool and can parse a lot of programming languages:

• C++ (cpp, c, c++)
• C# (c#, c-sharp, csharp)
• CSS (css)
• Delphi (delphi, pascal)
• Java (java)
• Java Script (js, jscript, javascript)
• PHP (php)
• Python (py, python)
• Ruby (rb, ruby, rails, ror)
• Sql (sql)
• VB (vb, vb.net)
• XML/HTML (xml, html, xhtml, xslt)

To learn format your source code use this tool, please refer to the usage from http://code.google.com/p/syntaxhighlighter/wiki/Usage. This post demonstrated the result of SyntaxHighlighter so you can make a quick decision. I used the code from Microsoft MSDN http://msdn.microsoft.com/en-us/library/w5c4hyx3(VS.80).aspx as the sample code for testing.

1. Default usage:

<pre name="code" class="cpp"> … code here … </pre>

Result:

// Exhibits polymorphism/virtual functions.

#include 
#include 
#define TRUE = 1
using namespace std;

class dog
{
public:
	// Source Code Omitted...

private:
   string _dogSize, _earType;
   int _legs;
   bool _bark;

};

class breed : public dog
{
public:
	/*
	Source Code Omitted...
	*/
};

int main()
{
   dog mongrel;
   breed labrador("yellow", "large");
   mongrel.setEars("pointy");
   labrador.setEars("long", "floppy");
   cout << "Cody is a " << labrador.getColor() << " labrador" << endl;
}

2. Display no gutter:

<pre name="code" class="cpp:nogutter"> … code here … </pre>

Result:

// Exhibits polymorphism/virtual functions.

#include 
#include 
#define TRUE = 1
using namespace std;

class dog
{
public:
	// Source Code Omitted...

private:
   string _dogSize, _earType;
   int _legs;
   bool _bark;

};

class breed : public dog
{
public:
	/*
	Source Code Omitted...
	*/
};

int main()
{
   dog mongrel;
   breed labrador("yellow", "large");
   mongrel.setEars("pointy");
   labrador.setEars("long", "floppy");
   cout << "Cody is a " << labrador.getColor() << " labrador" << endl;
}

3. Display no controls at the top

<pre name="code" class="cpp:nocontrols"> … code here … </pre>

Result

// Exhibits polymorphism/virtual functions.

#include 
#include 
#define TRUE = 1
using namespace std;

class dog
{
public:
	// Source Code Omitted...

private:
   string _dogSize, _earType;
   int _legs;
   bool _bark;

};

class breed : public dog
{
public:
	/*
	Source Code Omitted...
	*/
};

int main()
{
   dog mongrel;
   breed labrador("yellow", "large");
   mongrel.setEars("pointy");
   labrador.setEars("long", "floppy");
   cout << "Cody is a " << labrador.getColor() << " labrador" << endl;
}

4. Collapse the block by default

<pre name="code" class="cpp:collapse"> … code here … </pre>

Result

// Exhibits polymorphism/virtual functions.

#include 
#include 
#define TRUE = 1
using namespace std;

class dog
{
public:
	// Source Code Omitted...

private:
   string _dogSize, _earType;
   int _legs;
   bool _bark;

};

class breed : public dog
{
public:
	/*
	Source Code Omitted...
	*/
};

int main()
{
   dog mongrel;
   breed labrador("yellow", "large");
   mongrel.setEars("pointy");
   labrador.setEars("long", "floppy");
   cout << "Cody is a " << labrador.getColor() << " labrador" << endl;
}

5. Begin line count at value. Default value is 1

<pre name="code" class="cpp:firstline[123]"> … code here … </pre>

Result

// Exhibits polymorphism/virtual functions.

#include 
#include 
#define TRUE = 1
using namespace std;

class dog
{
public:
	// Source Code Omitted...

private:
   string _dogSize, _earType;
   int _legs;
   bool _bark;

};

class breed : public dog
{
public:
	/*
	Source Code Omitted...
	*/
};

int main()
{
   dog mongrel;
   breed labrador("yellow", "large");
   mongrel.setEars("pointy");
   labrador.setEars("long", "floppy");
   cout << "Cody is a " << labrador.getColor() << " labrador" << endl;
}

6. Show row columns in the first line.

<pre name="code" class="cpp:showcolumns"> … code here … </pre>

Result

// Exhibits polymorphism/virtual functions.

#include 
#include 
#define TRUE = 1
using namespace std;

class dog
{
public:
	// Source Code Omitted...

private:
   string _dogSize, _earType;
   int _legs;
   bool _bark;

};

class breed : public dog
{
public:
	/*
	Source Code Omitted...
	*/
};

int main()
{
   dog mongrel;
   breed labrador("yellow", "large");
   mongrel.setEars("pointy");
   labrador.setEars("long", "floppy");
   cout << "Cody is a " << labrador.getColor() << " labrador" << endl;
}

If you are using WordPress plug-in, please be sure to remove redundant JavaScript files in your plug-in source code and speed up the page loading. Go to WordPress dashboard, Plugins -> Plugin Editor, select "Google Syntax Highlighter for WordPress", go to the bottom of the source code, I removed the similar lines to the line below and kept this line to highlight CPP code:

<script class="javascript" src="<?php echo $current_path; ?>Scripts/shBrushCpp.js"></script>

The first approach is to write inline functions and call them when compare floating point numbers. It is easy to understand and is widely used by numerous applications. Yes, it is really simple and I like it. The only concern is that I have to call these functions explicitly when compare two float or double variables, and I have to be aware of the code where it is necessary to compare with tolerance.

The second approach is to encapsulation floating point using a class. A float variable is the only member variable and I have to override lots of operators, assignment operator, relational and equality operators to control flow, arithmetic, unary, prefix and postfix operators. But how to implement the class is not a big deal, I’m worrying about the performance decrease which is introduced by using classes instead of pure machine data type.

Then I write the first to my open source library LibG, and made unit test for performance. The result looks good to me.

Testing Environment
Hardware1: CPU: AMD Sempron 2600+ (1.6G Hz). Memory: 1G, DDR400
Hardware2: CPU: Intel Core2 6300 (1.86G Hz). Memory: 4G
Software: Windows XP Professional with SP2

Testing Method
Repeat 15million times of a set of operations. There are one additional assignment, one comparison and one pre-decrement to complete the loop. Run 10 times and get average time.

Source Code
Open source portal of LibG: http://code.google.com/p/libg/
The class giFloat and giDouble: http://code.google.com/p/libg/source/browse/trunk/inc/gifloat.h
The testing code: http://code.google.com/p/libg/source/browse/trunk/test/libg_unit_test/test_gifloat.cpp

Testing Result
1. Arithmetic Operations: Operations Set: +, -, *, /, +=, -=, *=, /=

2. Relational and Equality Operations: Operations Set: ==, !=, >, >=, <, <=

Because any given number can be represented in scientific notation in multiple ways, floating point numbers are normalized so that they are represented as a base 2 decimal with a 1 to the left of the decimal point, adjusting the exponent as necessary to make this requirement hold. So, for example, the number 1.25 would be represented with a mantissa of 1.01 and an exponent of 0:
(-1)

The number 10.0 would be represented with a mantissa of 1.01 and an exponent of 3:
(-1)

0      0x00000000
1.0    0x3f800000
0.5    0x3f000000
3      0x40400000
+inf   0x7f800000
-inf   0xff800000
+NaN   0x7fc00000 or 0x7ff00000
in general: number = (sign ? -1:1) * 2^(exponent) * 1.(mantissa bits)