/*+
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* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).+
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of the License "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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*+
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* Description: +
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*+
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*/+
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+
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+
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#include "t_bacline.h"+
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+
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+
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CCommandLineArguments* CCommandLineArguments::NewLC()+
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/** Allocates and constructs a command line arguments parser, putting the returned +
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pointer onto the cleanup stack. The function leaves if there is insufficient +
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memory.+
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+
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@return The command line arguments parser. */+
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	{+
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	CCommandLineArguments* self=new (ELeave) CCommandLineArguments;+
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	CleanupStack::PushL(self);+
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	self->ConstructL();+
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	return self;+
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	}+
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+
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CCommandLineArguments* CCommandLineArguments::NewL()+
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/** Allocates and constructs a command line arguments parser. The function leaves +
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if there is insufficient memory.+
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+
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@return The command line arguments parser. */+
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	{+
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	CCommandLineArguments* self=CCommandLineArguments::NewLC();+
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	CleanupStack::Pop();+
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	return self;+
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	}+
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+
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CCommandLineArguments::~CCommandLineArguments()+
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/** Frees resources prior to destruction. */+
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	{+
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	delete iArgs;+
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	}+
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+
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CCommandLineArguments::CCommandLineArguments()+
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	{+
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	}+
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+
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void CCommandLineArguments::ConstructL()+
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	{+
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	// allocate args array+
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	iArgs=new (ELeave) CArrayFixFlat<TPtrC> (10);+
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	RProcess me;+
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	// get raw command line+
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	User::CommandLine(iCommandLine);+
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	iFileName=me.FileName();+
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	// scan for each argument+
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	TText* out=(TText*) iCommandLine.Ptr();+
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	const TText* scan=iCommandLine.Ptr();+
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	const TText* end=scan+iCommandLine.Length();+
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	while (scan < end) // scan one argument+
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		{+
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		while (scan < end && *scan==' ') // skip leading space+
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			scan++;+
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		if (scan == end) // ignore if blank+
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			break;+
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		TBool quoted=*scan=='\"'; // note leading quote+
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		if (quoted)+
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			scan++;+
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		TText* start=out; // note start in output+
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		if (!quoted) // if not quoted, scan for blank+
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			{+
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			while (scan < end && *scan!=' ')+
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				*out++ = *scan++;+
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			}+
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		else // quoted, scan for quote+
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			{+
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			for (;;) // one quote-or-double sequence+
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				{+
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				while (scan < end && *scan!='\"') // all up to quote+
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					*out++ = *scan++;+
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				if (scan < end) // skip quote+
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					scan++;+
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				if (scan < end && *scan=='\"') // transfer if quote is doubled+
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					*out++ = *scan++;+
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				else // finished this arg+
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					break;+
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				}+
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			}+
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		TPtrC arg(start, out-start);+
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		iArgs->AppendL(arg);+
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		}+
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	}+
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+
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+
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TPtrC CCommandLineArguments::Arg(TInt aArg) const+
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/** Returns a non-modifiable pointer descriptor representing the specified command-line +
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argument.+
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+
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Arg(0) is the file name as specified on the command line. Arg(1), Arg(2) etc. +
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are the arguments specified to the command.+
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+
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The pointer descriptor is valid throughout the lifetime of the CCommandLineArguments +
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object. If you wish to retain argument values after the CCommandLineArguments +
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object is destroyed, you should copy the argument data into a different object.+
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+
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@param aArg The index of the desired argument. This number must be less than +
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Count(). Specify 0 for the name used to invoke the process. Specify 1, 2 etc. +
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for the arguments.+
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@return Non-modifiable pointer descriptor to the specified argument text. */+
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	{+
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	if (aArg > 0 ) // a normal argument+
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		return iArgs->operator[](aArg-1);+
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	else // process name+
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		return TPtrC(iFileName);+
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	}+
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+
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TInt CCommandLineArguments::Count() const+
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/** Returns the number of command line arguments, including the program name.+
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+
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@return The number of command line arguments, plus one for the program name. +
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Returns 1, if no arguments are specified. */+
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	{+
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	return iArgs->Count()+1;+
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	}+
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