/*

 * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

 #include "t_bacline.h"

 CCommandLineArguments* CCommandLineArguments::NewLC()

 /** Allocates and constructs a command line arguments parser, putting the returned 

 pointer onto the cleanup stack. The function leaves if there is insufficient 

 memory.

 @return The command line arguments parser. */

 	{

 	CCommandLineArguments* self=new (ELeave) CCommandLineArguments;

 	CleanupStack::PushL(self);

 	self->ConstructL();

 	return self;

 	}

 CCommandLineArguments* CCommandLineArguments::NewL()

 /** Allocates and constructs a command line arguments parser. The function leaves 

 if there is insufficient memory.

 @return The command line arguments parser. */

 	{

 	CCommandLineArguments* self=CCommandLineArguments::NewLC();

 	CleanupStack::Pop();

 	return self;

 	}

 CCommandLineArguments::~CCommandLineArguments()

 /** Frees resources prior to destruction. */

 	{

 	delete iArgs;

 	}

 CCommandLineArguments::CCommandLineArguments()

 	{

 	}

 void CCommandLineArguments::ConstructL()

 	{

 	// allocate args array

 	iArgs=new (ELeave) CArrayFixFlat<TPtrC> (10);

 	RProcess me;

 	// get raw command line

 	User::CommandLine(iCommandLine);

 	iFileName=me.FileName();

 	// scan for each argument

 	TText* out=(TText*) iCommandLine.Ptr();

 	const TText* scan=iCommandLine.Ptr();

 	const TText* end=scan+iCommandLine.Length();

 	while (scan < end) // scan one argument

 		{

 		while (scan < end && *scan==' ') // skip leading space

 			scan++;

 		if (scan == end) // ignore if blank

 			break;

 		TBool quoted=*scan=='\"'; // note leading quote

 		if (quoted)

 			scan++;

 		TText* start=out; // note start in output

 		if (!quoted) // if not quoted, scan for blank

 			{

 			while (scan < end && *scan!=' ')

 				*out++ = *scan++;

 			}

 		else // quoted, scan for quote

 			{

 			for (;;) // one quote-or-double sequence

 				{

 				while (scan < end && *scan!='\"') // all up to quote

 					*out++ = *scan++;

 				if (scan < end) // skip quote

 					scan++;

 				if (scan < end && *scan=='\"') // transfer if quote is doubled

 					*out++ = *scan++;

 				else // finished this arg

 					break;

 				}

 			}

 		TPtrC arg(start, out-start);

 		iArgs->AppendL(arg);

 		}

 	}

 TPtrC CCommandLineArguments::Arg(TInt aArg) const

 /** Returns a non-modifiable pointer descriptor representing the specified command-line 

 argument.

 Arg(0) is the file name as specified on the command line. Arg(1), Arg(2) etc. 

 are the arguments specified to the command.

 The pointer descriptor is valid throughout the lifetime of the CCommandLineArguments 

 object. If you wish to retain argument values after the CCommandLineArguments 

 object is destroyed, you should copy the argument data into a different object.

 @param aArg The index of the desired argument. This number must be less than 

 Count(). Specify 0 for the name used to invoke the process. Specify 1, 2 etc. 

 for the arguments.

 @return Non-modifiable pointer descriptor to the specified argument text. */

 	{

 	if (aArg > 0 ) // a normal argument

 		return iArgs->operator[](aArg-1);

 	else // process name

 		return TPtrC(iFileName);

 	}

 TInt CCommandLineArguments::Count() const

 /** Returns the number of command line arguments, including the program name.

 @return The number of command line arguments, plus one for the program name. 

 Returns 1, if no arguments are specified. */

 	{

 	return iArgs->Count()+1;

 	}