hxresmg.cpp

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/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxresmg.cpp,v 1.8.20.1 2004/07/09 02:07:27 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
 * RealNetworks.  You may not use this file except in compliance with
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 * 
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
 * 
 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK ***** */

#include "hxcom.h"
#include "hlxclib/stdio.h"
#include "hlxclib/stdlib.h"
#ifdef _WINDOWS
#include <windows.h>
#endif

#if defined(_MACINTOSH) && !defined(_MAC_MACHO)
#include <stat.h>
#else
#include "hlxclib/sys/stat.h"
#endif
#include "hxxrsmg.h"
#include "hxplugn.h"
#include "hxfiles.h"
#include "hxcomm.h"
#include "hxxres.h"
#include "hxengin.h"
#include "ihxpckts.h"
#include "hxprefs.h"
#include "hxmon.h"

#include "hxslist.h"
#include "hxstrutl.h"
#include "chxpckts.h"
#include "md5.h"
#include "findfile.h"
#include "hxresmg.h"
#include "dllpath.h"

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE
static const char HX_THIS_FILE[] = __FILE__;
#endif

// IHXPreferences key defines
#define EXT_RES_DIR		"ExtResources"
#define EXT_RES_DATA_KEY	"ExternalResourcesData"
#define FILE_INFO_KEY		"FileInfo"
#define CHECKSUM_KEY		"XRSCheckSum"
#define LANGUAGE_KEY		"Language"
#define LANG_ID_KEY		"LangID"

// for OS_SEPARATOR_CHAR and OS_SEPARATOR_STRING
#include "hxdir.h"

// static initializations
#if !defined(HELIX_CONFIG_NOSTATICS)
HXExternalResourceManager* HXExternalResourceManager::m_pResourceManager = NULL;
#else
#include "globals/hxglobals.h"
const HXExternalResourceManager* const HXExternalResourceManager::m_pResourceManager = NULL;
#endif


// HXExternalResourceManager methods
HXExternalResourceManager::HXExternalResourceManager(IUnknown* pContext):
     m_lRefCount(0)
    ,m_pResourceList(NULL)
    ,m_pContext(pContext)
    ,m_pHXXResPlugin(NULL)
    ,m_ulLanguageID(0x0409)
    ,m_pExternalResDir(NULL)
    ,m_pPrefs(NULL)
    ,m_pRegistry(NULL)
{
    if(m_pContext)
    {
	m_pContext->AddRef();
    }
    Init();
}

HXExternalResourceManager::~HXExternalResourceManager()
{
    delete[] m_pExternalResDir;

    if(m_pResourceList)
    {
	CHXSimpleList::Iterator i = m_pResourceList->Begin();
	for (; i != m_pResourceList->End(); ++i)
	{
	    IHXXResFile* pRes = (IHXXResFile*)(*i);
	    pRes->Close();
	    pRes->Release();
	}
    }

    HX_DELETE(m_pResourceList);
    HX_RELEASE(m_pPrefs);
    HX_RELEASE(m_pRegistry);
    HX_RELEASE(m_pContext);
    HX_RELEASE(m_pHXXResPlugin);

#if defined(HELIX_CONFIG_NOSTATICS)
    HXExternalResourceManager*& m_pResourceManager =
	(HXExternalResourceManager*&)HXGlobalPtr::Get(
	    &HXExternalResourceManager::m_pResourceManager);
#endif
    m_pResourceManager = NULL;
}

HXExternalResourceManager*
HXExternalResourceManager::Instance(IUnknown* pContext)
{
#if defined(HELIX_CONFIG_NOSTATICS)
    HXExternalResourceManager*& m_pResourceManager =
	(HXExternalResourceManager*&)HXGlobalPtr::Get(
	    &HXExternalResourceManager::m_pResourceManager);
#endif

    if(!m_pResourceManager)
    {
	m_pResourceManager = new HXExternalResourceManager(pContext);
    }

    if (m_pResourceManager)
    {
	m_pResourceManager->AddRef();
    }

    return m_pResourceManager;
}


// IUnknown methods

STDMETHODIMP 
HXExternalResourceManager::QueryInterface(REFIID riid, void** ppvObj)
{
    QInterfaceList qiList[] =
        {
            { GET_IIDHANDLE(IID_IHXExternalResourceManager), (IHXExternalResourceManager*)this },
            { GET_IIDHANDLE(IID_IUnknown), (IUnknown*)(IHXExternalResourceManager*)this },
        };
    
    return ::QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
}

STDMETHODIMP_(ULONG32) 
HXExternalResourceManager::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

STDMETHODIMP_(ULONG32) 
HXExternalResourceManager::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
	return m_lRefCount;
    }

    delete this;
    return 0;
}

// IHXExternalResourceManager methods

STDMETHODIMP
HXExternalResourceManager::Init()
{
    HX_RESULT rc = GetHXXResPlugin();

    if(HXR_OK == rc)
    {
	// get language and res directory preferences/reg entries
	if (HXR_OK == m_pContext->QueryInterface(IID_IHXPreferences,
						(void**)&m_pPrefs) &&
	    HXR_OK == m_pContext->QueryInterface(IID_IHXRegistry, 
						(void**)&m_pRegistry))
	{
	    IHXBuffer* pBuffer = NULL;
	    CHXString strTemp;
	    strTemp.Format("%s.%s",HXREGISTRY_PREFPROPNAME, "LangID");
	    if(HXR_OK == m_pRegistry->GetStrByName(strTemp, pBuffer))
	    {
		const char* pActualLangID = (const char*)pBuffer->GetBuffer();
		m_ulLanguageID = strtol(pActualLangID, NULL, 10);
		HX_RELEASE(pBuffer);
	    }

            const char* pPath = NULL;
            // Get the plugin directory from the Dll Access Paths
            if (GetDLLAccessPath() &&
                (pPath = GetDLLAccessPath()->GetPath(DLLTYPE_PLUGIN)) &&
                *pPath)
            {
                UINT32 ulBufLen = strlen(pPath) + 1 + strlen(EXT_RES_DIR) + 1;
                m_pExternalResDir = new char[ulBufLen];
                SafeStrCpy(m_pExternalResDir, pPath, ulBufLen);
                if (m_pExternalResDir[strlen(m_pExternalResDir)-1] != OS_SEPARATOR_CHAR)
                {
                    SafeStrCat(m_pExternalResDir, OS_SEPARATOR_STRING, ulBufLen);
                }

                SafeStrCat(m_pExternalResDir, EXT_RES_DIR, ulBufLen);
                rc = LoadResourceFiles();
            }

	}
    }

    return rc;
}

STDMETHODIMP
HXExternalResourceManager::CreateExternalResourceReader(
				    const char* pShortName,
				    REF(IHXExternalResourceReader*) pReader)
{
    HX_RESULT rc = HXR_OK;

    HXExternalResourceReader* pHXReader = new HXExternalResourceReader(this);
    if(!pHXReader)
    {
	return HXR_OUTOFMEMORY;
    }
    pHXReader->AddRef();
    pHXReader->Init(pShortName, m_pResourceList);

    pReader = pHXReader;
    return rc;
}


// HXExternalResourceManager private methods

HX_RESULT
HXExternalResourceManager::GetHXXResPlugin()
{
    HX_RESULT rc = HXR_FAILED;

    IUnknown* pUnk = NULL;
    IUnknown* pUnknownInstance = NULL;
    IHXCommonClassFactory* pCommonClassFactory = NULL;
    IHXPluginGroupEnumerator* pGroupEnumerator = NULL;
    UINT32 ulNumPlugins = 0;

    // enumerate the plugins
    if (HXR_OK != m_pContext->QueryInterface(
				IID_IHXCommonClassFactory,
				(void**)&pCommonClassFactory))
    {
	goto cleanup;
    }

    if (HXR_OK != pCommonClassFactory->CreateInstance(
				CLSID_IHXPluginGroupEnumerator,
				(void**)&pUnk))
    {
	goto cleanup;
    }

    if (HXR_OK != pUnk->QueryInterface(IID_IHXPluginGroupEnumerator,
				    (void**)&pGroupEnumerator))
    {
	goto cleanup;
    }

    if (HXR_OK != pGroupEnumerator->Init(IID_IHXXResFile))
    {
	goto cleanup;
    }

    ulNumPlugins = pGroupEnumerator->GetNumOfPlugins();
    if(ulNumPlugins > 0)
    {
	if (HXR_OK == pGroupEnumerator->GetPlugin(0, pUnknownInstance))
	{
	    m_pHXXResPlugin = pUnknownInstance;
	    m_pHXXResPlugin->AddRef();
	    rc = HXR_OK;
	}
    }

cleanup:
    HX_RELEASE(pUnk);
    HX_RELEASE(pUnknownInstance);
    HX_RELEASE(pCommonClassFactory);
    HX_RELEASE(pGroupEnumerator);

    return rc;
}

BOOL
HXExternalResourceManager::ContainsCurrentLanguage(IHXXResFile* pResFile)
{
    BOOL rc = FALSE;

    if(!pResFile)
    {
	return rc;
    }

    UINT32 ulLangID = 0;
    BOOL bFound = FALSE;
    rc = pResFile->GetFirstResourceLanguage(ulLangID);
    while(HXR_OK == rc)
    {
	if(m_ulLanguageID == ulLangID)
	{
	    rc = TRUE;
	    break;
	}
	rc = pResFile->GetNextResourceLanguage(ulLangID);
    };

    return rc;
}

IHXXResFile*
HXExternalResourceManager::MakeResFileObject(const char* pPath)
{
    IHXXResFile* pResFile = NULL;

    if(m_pHXXResPlugin &&
	HXR_OK == m_pHXXResPlugin->QueryInterface(IID_IHXXResFile, 
						(void**)&pResFile))
    {
	HX_RESULT rc = HXR_OK;

	// open res file and see if it contains any resources with the
	// current language ID

	pResFile->Open(pPath);
	if(ContainsCurrentLanguage(pResFile))
	{
	    pResFile->SetLanguage(m_ulLanguageID);
	}
	else
	{
	    HX_RELEASE(pResFile);   // don't want this one
	}
    }
    return pResFile;
}

HX_RESULT
HXExternalResourceManager::Stat(const char* pPath, struct stat* pStatBuffer)
{
    HX_RESULT rc = HXR_OK;