/* $Id: ShellCommandsLinkedList.cpp,v 1.1 2000/10/04 21:04:31 ea Exp $
 *
 * regexpl - Console Registry Explorer
 *
 * Copyright (c) 1999-2000 Nedko Arnaoudov <nedkohome@atia.com>
 *
 * License: GNU GPL
 *
 */

// ShellCommandsLinkedList.cpp: implementation of the CShellCommandsLinkedList class.
//
//////////////////////////////////////////////////////////////////////

#include "ph.h"
#include "ShellCommandsLinkedList.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CShellCommandsLinkedList::CShellCommandsLinkedList(CConsole& rConsole):m_rConsole(rConsole)
{
	m_pRoot = NULL;
}

CShellCommandsLinkedList::~CShellCommandsLinkedList()
{
}

void CShellCommandsLinkedList::AddCommand(CShellCommand *pCommand)
{
	// Create new node
	SNode *pNewNode = new SNode;
	if (pNewNode == NULL)
		return;

	pNewNode->m_pData = pCommand;

	// add new node to the end
	if (m_pRoot)
	{
		SNode *pLastNode = m_pRoot;

		while (pLastNode->m_pNext)
			pLastNode = pLastNode->m_pNext;

		pLastNode->m_pNext = pNewNode;
	}
	else
	{
		m_pRoot = pNewNode;
	}
}

int CShellCommandsLinkedList::Execute(CArgumentParser& rArgumentParser, int& nReturnValue)
{
	rArgumentParser.ResetArgumentIteration();

	const TCHAR *pchCommand = rArgumentParser.GetNextArgument();

	if (pchCommand == NULL)	// empty command line
		return -2;

	int i = -1;

	SNode *pNode = m_pRoot;
	
	while(pNode)
	{
		i++;
		if (pNode->m_pData->Match(pchCommand))
		{
			nReturnValue = pNode->m_pData->Execute(m_rConsole,rArgumentParser);
			return i;
		}
		pNode = pNode->m_pNext;
	}

	return -1;
}

CShellCommand * CShellCommandsLinkedList::Match(const TCHAR * pchCommand)
{
	SNode *pNode = m_pRoot;
	
	while(pNode)
	{
		if (pNode->m_pData->Match(pchCommand))
			return pNode->m_pData;
		pNode = pNode->m_pNext;
	}

	return NULL;
}

POSITION CShellCommandsLinkedList::GetFirstCommandPosition()
{
	return (POSITION)m_pRoot;
}

CShellCommand * CShellCommandsLinkedList::GetNextCommand(POSITION& rPos)
{
	CShellCommand * pCommand = ((SNode *)rPos)->m_pData;
	rPos = (POSITION)(((SNode *)rPos)->m_pNext);
	return pCommand;
}