ShellCommandsLinkedList.cpp

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/*
 * regexpl - Console Registry Explorer
 *
 * Copyright (C) 2000-2005 Nedko Arnaudov <nedko@users.sourceforge.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
 
// 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 (std::nothrow) 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;
}