Source code for utf8removebom.cs

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namespace RobvanderWoude
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{
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	class UTF8removeBOM
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	{
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		static string progver = "1.00";
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		static int Main( string[] args )
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		{
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			#region Parse Command Line
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			if ( args.Length < 2 || args.Length > 3 )

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			{
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				return ShowHelp( );
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			}
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			bool overwrite = false;
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			string filein = args[0];
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			string fileout = args[0];
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			if ( !System.IO.File.Exists( filein ) )

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			{
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				return ShowHelp( "Source file not found" );

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			}
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			if ( args[1].ToUpper( ) == "/O" )
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			{
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				overwrite = true;
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			}
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			else
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			{
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				fileout = args[1];
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			}
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			if ( args.Length == 3 )
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			{
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				if ( args[2].ToUpper( ) == "/O" )
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				{
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					overwrite = true;
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				}
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				else
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				{
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					fileout = args[2];
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				}
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			}
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			if ( !overwrite )
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			{
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				if ( filein == fileout )
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				{
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					return ShowHelp( "Use /O to overwrite existing source file" );

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				}
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				else
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				{
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					if ( System.IO.File.Exists( fileout ) )

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					{
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						return ShowHelp( "Use /O to overwrite existing target file" );

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					}
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				}
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			}
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			#endregion Parse Command Line
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			try
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			{
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				// Open source file
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				System.IO.StreamReader sr = new System.IO.StreamReader( filein );

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				// Read text from source file
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				string text = sr.ReadToEnd( );
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				// Close source file
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				sr.Close( );
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				// Delete target file if it exists
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				if ( System.IO.File.Exists( fileout ) )

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				{
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					System.IO.File.Delete( fileout );
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				}
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				// Open target file, set encoding to UTF-8 without BOM

				System.IO.StreamWriter sw = new System.IO.StreamWriter( fileout, false, new System.Text.UTF8Encoding( false ) );

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				// Write text to target file
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				sw.Write( text );
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				// Close target file
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				sw.Close( );
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			}
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			catch ( System.Exception e )
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			{
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				return ShowHelp( e.Message );
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			}
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			// Done
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			return 0;
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		}
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		#region Error handling
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		public static int ShowHelp( params string[] errmsg )

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		{
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			#region Error Message
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			if ( errmsg.Length > 0 )
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			{
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				System.Collections.Generic.List<string> errargs = new System.Collections.Generic.List<string>( errmsg );

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				errargs.RemoveAt( 0 );
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				System.Console.Error.WriteLine( );
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				System.Console.ForegroundColor = System.ConsoleColor.Red;

				System.Console.Error.Write( "ERROR:\t" );

				System.Console.ForegroundColor = System.ConsoleColor.White;

				System.Console.Error.WriteLine( errmsg[0], errargs.ToArray( ) );

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				System.Console.ResetColor( );
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			}
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			#endregion Error Message
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			#region Help Text
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```
			/*
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```
			UTF8removeBOM,  Version 1.00
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			Read a text file and save the text in UTF-8 format without Byte Order Mark

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```

			Usage:   UTF8REMOVEBOM  textfilein  [ texfileout ]  [ /O ]

```
 
```

			Where:   textfilein   is the source text file

			         textfileout  is the target text file

			                      (default if not specified: textfilein)

			         /O           overwrite existing target file,

			                      required if target file is not specified

			                      (default: abort if target file exists)

```
 
```

			Notes:   At least 2 command line arguments are required.

			         Return code is -1 in case of errors, otherwise 0.

			         This simple tool was written with the following workflow in mind:

			         Use VBScript's OpenTextFile with TriStateTrue option to write text file

			         Use this tool to remove the Byte Order Mark

			         Use PHP command print( htmlentities( file_get_contents( textfile ) ) )

			         to show the text correctly in a web page

```
 
```
```
			Written by Rob van der Woude
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			http://www.robvanderwoude.com
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			*/
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			#endregion Help Text
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			#region Display help
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			System.Console.Error.WriteLine( );
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			System.Console.Error.WriteLine( "UTF8removeBOM.exe,  Version {0}", progver );

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			System.Console.Error.WriteLine( "Read a text file and save the text in UTF-8 format without Byte Order Mark" );

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			System.Console.Error.WriteLine( );
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			System.Console.Error.Write( "Usage:   " );

			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.WriteLine( "UTF8REMOVEBOM  textfilein  [ texfileout ]  [ /O ]" );

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			System.Console.ResetColor( );
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			System.Console.Error.WriteLine( );
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			System.Console.Error.Write( "Where:   " );

			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.Write( "textfilein" );

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			System.Console.ResetColor( );
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			System.Console.Error.WriteLine( "   is the source text file" );

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			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.Write( "         textfileout" );

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			System.Console.ResetColor( );
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			System.Console.Error.WriteLine( "  is the target text file" );

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			System.Console.Error.WriteLine( "                      (default if not specified: textfilein)" );

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			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.Write( "         /O" );

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			System.Console.ResetColor( );
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			System.Console.Error.WriteLine( "           overwrite existing target file," );

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			System.Console.Error.WriteLine( "                      required if target file is not specified" );

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			System.Console.Error.WriteLine( "                      (default: abort if target file exists)" );

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```
```
			System.Console.Error.WriteLine( );
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			System.Console.Error.WriteLine( "Notes:   At least 2 command line arguments are required." );

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			System.Console.Error.WriteLine( "         Return code is -1 in case of errors, otherwise 0." );

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			System.Console.Error.WriteLine( "         This simple tool was written with the following workflow in mind:" );

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```
```
			System.Console.WriteLine( );
```
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			System.Console.Error.Write( "         *  VBScript's " );

			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.Write( "OpenTextFile" );

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			System.Console.ResetColor( );
```

			System.Console.Error.Write( " writes text file with " );

			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.Write( "TriStateTrue" );

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			System.Console.ResetColor( );
```

			System.Console.Error.WriteLine( " option" );

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			System.Console.Error.Write( "         *  " );

			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.Write( "UTF8removeBOM.exe" );

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			System.Console.ResetColor( );
```

			System.Console.Error.WriteLine( " removes the Byte Order Mark" );

```
 
```

			System.Console.Error.Write( "         *  PHP command " );

			System.Console.ForegroundColor = System.ConsoleColor.White;

			System.Console.Error.WriteLine( "print( htmlentities( file_get_contents( textfile ) ) )" );

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			System.Console.ResetColor( );
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			System.Console.Error.WriteLine( "            shows the text correctly in a web page" );

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```
```
			System.Console.Error.WriteLine( );
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			System.Console.Error.WriteLine( "Written by Rob van der Woude" );

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			System.Console.Error.WriteLine( "http://www.robvanderwoude.com" );

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```
			#endregion Display Help
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```
```
 
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```
			return -1;
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		}
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		#endregion Error handling
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	}
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}
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```