WebCore/plugins/PluginPackage.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Collabora Ltd.  All rights reserved.
  * Copyright (C) 2009 Holger Hans Peter Freyther
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"
 #include "PluginPackage.h"

 #include "CString.h"
 #include "MIMETypeRegistry.h"
 #include "PluginDatabase.h"
 #include "PluginDebug.h"
 #include "Timer.h"
 #include "npruntime_impl.h"
 #include <string.h>
 #include <wtf/OwnArrayPtr.h>

 namespace WebCore {

 PluginPackage::~PluginPackage()
 {
     // This destructor gets called during refresh() if PluginDatabase's
     // PluginSet hash is already populated, as it removes items from
     // the hash table. Calling the destructor on a loaded plug-in of
     // course would cause a crash, so we check to call unload before we
     // ASSERT.
     // FIXME: There is probably a better way to fix this.
     if (m_loadCount == 0)
         unloadWithoutShutdown();
     else
         unload();

     ASSERT(!m_isLoaded);
 }

 void PluginPackage::freeLibrarySoon()
 {
     ASSERT(!m_freeLibraryTimer.isActive());
     ASSERT(m_module);
     ASSERT(m_loadCount == 0);

     m_freeLibraryTimer.startOneShot(0);
 }

 void PluginPackage::freeLibraryTimerFired(Timer<PluginPackage>*)
 {
     ASSERT(m_module);
     ASSERT(m_loadCount == 0);

     unloadModule(m_module);
     m_module = 0;
 }


 int PluginPackage::compare(const PluginPackage& compareTo) const
 {
     // Sort plug-ins that allow multiple instances first.
     bool AallowsMultipleInstances = !quirks().contains(PluginQuirkDontAllowMultipleInstances);
     bool BallowsMultipleInstances = !compareTo.quirks().contains(PluginQuirkDontAllowMultipleInstances);
     if (AallowsMultipleInstances != BallowsMultipleInstances)
         return AallowsMultipleInstances ? -1 : 1;

     // Sort plug-ins in a preferred path first.
     bool AisInPreferredDirectory = PluginDatabase::isPreferredPluginDirectory(parentDirectory());
     bool BisInPreferredDirectory = PluginDatabase::isPreferredPluginDirectory(compareTo.parentDirectory());
     if (AisInPreferredDirectory != BisInPreferredDirectory)
         return AisInPreferredDirectory ? -1 : 1;

     int diff = strcmp(name().utf8().data(), compareTo.name().utf8().data());
     if (diff)
         return diff;

     diff = compareFileVersion(compareTo.version());
     if (diff)
         return diff;

     return strcmp(parentDirectory().utf8().data(), compareTo.parentDirectory().utf8().data());
 }

 PluginPackage::PluginPackage(const String& path, const time_t& lastModified)
     : m_isLoaded(false)
     , m_loadCount(0)
     , m_path(path)
     , m_moduleVersion(0)
     , m_module(0)
     , m_lastModified(lastModified)
     , m_freeLibraryTimer(this, &PluginPackage::freeLibraryTimerFired)
 {
     m_fileName = pathGetFileName(m_path);
     m_parentDirectory = m_path.left(m_path.length() - m_fileName.length() - 1);
 }

 void PluginPackage::unload()
 {
     if (!m_isLoaded)
         return;

     if (--m_loadCount > 0)
         return;

     m_NPP_Shutdown();

     unloadWithoutShutdown();
 }

 void PluginPackage::unloadWithoutShutdown()
 {
     if (!m_isLoaded)
         return;

     ASSERT(m_loadCount == 0);
     ASSERT(m_module);

     // <rdar://5530519>: Crash when closing tab with pdf file (Reader 7 only)
     // If the plugin has subclassed its parent window, as with Reader 7, we may have
     // gotten here by way of the plugin's internal window proc forwarding a message to our
     // original window proc. If we free the plugin library from here, we will jump back
     // to code we just freed when we return, so delay calling FreeLibrary at least until
     // the next message loop
     freeLibrarySoon();

     m_isLoaded = false;
 }

 PassRefPtr<PluginPackage> PluginPackage::createPackage(const String& path, const time_t& lastModified)
 {
     RefPtr<PluginPackage> package = adoptRef(new PluginPackage(path, lastModified));

     if (!package->fetchInfo())
         return 0;

     return package.release();
 }

 #if defined(XP_UNIX)
 void PluginPackage::determineQuirks(const String& mimeType)
 {
     if (MIMETypeRegistry::isJavaAppletMIMEType(mimeType)) {
         // Because a single process cannot create multiple VMs, and we cannot reliably unload a
         // Java VM, we cannot unload the Java plugin, or we'll lose reference to our only VM
         m_quirks.add(PluginQuirkDontUnloadPlugin);

         // Setting the window region to an empty region causes bad scrolling repaint problems
         // with the Java plug-in.
         m_quirks.add(PluginQuirkDontClipToZeroRectWhenScrolling);
         return;
     }

     if (mimeType == "application/x-shockwave-flash") {
         static const PlatformModuleVersion flashTenVersion(0x0a000000);

         if (compareFileVersion(flashTenVersion) >= 0) {
             // Flash 10.0 b218 doesn't like having a NULL window handle
             m_quirks.add(PluginQuirkDontSetNullWindowHandleOnDestroy);
 #if PLATFORM(QT)
             m_quirks.add(PluginQuirkRequiresGtkToolKit);
 #endif
         } else {
             // Flash 9 and older requests windowless plugins if we return a mozilla user agent
             m_quirks.add(PluginQuirkWantsMozillaUserAgent);
         }

         m_quirks.add(PluginQuirkThrottleInvalidate);
         m_quirks.add(PluginQuirkThrottleWMUserPlusOneMessages);
         m_quirks.add(PluginQuirkFlashURLNotifyBug);
     }
 }
 #endif

 #if !PLATFORM(WIN_OS)
 void PluginPackage::determineModuleVersionFromDescription()
 {
     // It's a bit lame to detect the plugin version by parsing it
     // from the plugin description string, but it doesn't seem that
     // version information is available in any standardized way at
     // the module level, like in Windows

     if (m_description.isEmpty())
         return;

     if (m_description.startsWith("Shockwave Flash") && m_description.length() >= 19) {
         // The flash version as a PlatformModuleVersion differs on Unix from Windows
         // since the revision can be larger than a 8 bits, so we allow it 16 here and
         // push the major/minor up 8 bits. Thus on Unix, Flash's version may be
         // 0x0a000000 instead of 0x000a0000.

         Vector<String> versionParts;
         m_description.substring(16).split(' ', /*allowEmptyEntries =*/ false, versionParts);
         if (versionParts.isEmpty())
             return;

         if (versionParts.size() >= 1) {
             Vector<String> majorMinorParts;
             versionParts[0].split('.', majorMinorParts);
             if (majorMinorParts.size() >= 1) {
                 bool converted = false;
                 unsigned major = majorMinorParts[0].toUInt(&converted);
                 if (converted)
                     m_moduleVersion = (major & 0xff) << 24;
             }
             if (majorMinorParts.size() == 2) {
                 bool converted = false;
                 unsigned minor = majorMinorParts[1].toUInt(&converted);
                 if (converted)
                     m_moduleVersion |= (minor & 0xff) << 16;
             }
         }

         if (versionParts.size() >= 2) {
             String revision = versionParts[1];
             if (revision.length() > 1 && (revision[0] == 'r' || revision[0] == 'b')) {
                 revision.remove(0, 1);
                 m_moduleVersion |= revision.toInt() & 0xffff;
             }
         }
     }
 }
 #endif

 #if ENABLE(NETSCAPE_PLUGIN_API)
 void PluginPackage::initializeBrowserFuncs()
 {
     memset(&m_browserFuncs, 0, sizeof(m_browserFuncs));
     m_browserFuncs.size = sizeof (m_browserFuncs);
     m_browserFuncs.version = NP_VERSION_MINOR;

     m_browserFuncs.geturl = NPN_GetURL;
     m_browserFuncs.posturl = NPN_PostURL;
     m_browserFuncs.requestread = NPN_RequestRead;
     m_browserFuncs.newstream = NPN_NewStream;
     m_browserFuncs.write = NPN_Write;
     m_browserFuncs.destroystream = NPN_DestroyStream;
     m_browserFuncs.status = NPN_Status;
     m_browserFuncs.uagent = NPN_UserAgent;
     m_browserFuncs.memalloc = NPN_MemAlloc;
     m_browserFuncs.memfree = NPN_MemFree;
     m_browserFuncs.memflush = NPN_MemFlush;
     m_browserFuncs.reloadplugins = NPN_ReloadPlugins;
     m_browserFuncs.geturlnotify = NPN_GetURLNotify;
     m_browserFuncs.posturlnotify = NPN_PostURLNotify;
     m_browserFuncs.getvalue = NPN_GetValue;
     m_browserFuncs.setvalue = NPN_SetValue;
     m_browserFuncs.invalidaterect = NPN_InvalidateRect;
     m_browserFuncs.invalidateregion = NPN_InvalidateRegion;
     m_browserFuncs.forceredraw = NPN_ForceRedraw;
     m_browserFuncs.getJavaEnv = NPN_GetJavaEnv;
     m_browserFuncs.getJavaPeer = NPN_GetJavaPeer;
     m_browserFuncs.pushpopupsenabledstate = NPN_PushPopupsEnabledState;
     m_browserFuncs.poppopupsenabledstate = NPN_PopPopupsEnabledState;
     m_browserFuncs.pluginthreadasynccall = NPN_PluginThreadAsyncCall;

     m_browserFuncs.releasevariantvalue = _NPN_ReleaseVariantValue;
     m_browserFuncs.getstringidentifier = _NPN_GetStringIdentifier;
     m_browserFuncs.getstringidentifiers = _NPN_GetStringIdentifiers;
     m_browserFuncs.getintidentifier = _NPN_GetIntIdentifier;
     m_browserFuncs.identifierisstring = _NPN_IdentifierIsString;
     m_browserFuncs.utf8fromidentifier = _NPN_UTF8FromIdentifier;
     m_browserFuncs.intfromidentifier = _NPN_IntFromIdentifier;
     m_browserFuncs.createobject = _NPN_CreateObject;
     m_browserFuncs.retainobject = _NPN_RetainObject;
     m_browserFuncs.releaseobject = _NPN_ReleaseObject;
     m_browserFuncs.invoke = _NPN_Invoke;
     m_browserFuncs.invokeDefault = _NPN_InvokeDefault;
     m_browserFuncs.evaluate = _NPN_Evaluate;
     m_browserFuncs.getproperty = _NPN_GetProperty;
     m_browserFuncs.setproperty = _NPN_SetProperty;
     m_browserFuncs.removeproperty = _NPN_RemoveProperty;
     m_browserFuncs.hasproperty = _NPN_HasProperty;
     m_browserFuncs.hasmethod = _NPN_HasMethod;
     m_browserFuncs.setexception = _NPN_SetException;
     m_browserFuncs.enumerate = _NPN_Enumerate;
     m_browserFuncs.construct = _NPN_Construct;
 }
 #endif

 #if ENABLE(PLUGIN_PACKAGE_SIMPLE_HASH)
 unsigned PluginPackage::hash() const
 {
     unsigned hashCodes[] = {
         m_path.impl()->hash(),
         m_lastModified
     };

     return StringImpl::computeHash(reinterpret_cast<UChar*>(hashCodes), sizeof(hashCodes) / sizeof(UChar));
 }

 bool PluginPackage::equal(const PluginPackage& a, const PluginPackage& b)
 {
     return a.m_description == b.m_description;
 }

 int PluginPackage::compareFileVersion(const PlatformModuleVersion& compareVersion) const
 {
     // return -1, 0, or 1 if plug-in version is less than, equal to, or greater than
     // the passed version
     if (m_moduleVersion != compareVersion)
         return m_moduleVersion > compareVersion ? 1 : -1;
     return 0;
 }
 #endif

 }
	/*
	* Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
	* Copyright (C) 2008 Collabora Ltd. All rights reserved.
	* Copyright (C) 2009 Holger Hans Peter Freyther
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"
	#include "PluginPackage.h"

	#include "CString.h"
	#include "MIMETypeRegistry.h"
	#include "PluginDatabase.h"
	#include "PluginDebug.h"
	#include "Timer.h"
	#include "npruntime_impl.h"
	#include <string.h>
	#include <wtf/OwnArrayPtr.h>

	namespace WebCore {

	PluginPackage::~PluginPackage()
	{
	// This destructor gets called during refresh() if PluginDatabase's
	// PluginSet hash is already populated, as it removes items from
	// the hash table. Calling the destructor on a loaded plug-in of
	// course would cause a crash, so we check to call unload before we
	// ASSERT.
	// FIXME: There is probably a better way to fix this.
	if (m_loadCount == 0)
	unloadWithoutShutdown();
	else
	unload();

	ASSERT(!m_isLoaded);
	}

	void PluginPackage::freeLibrarySoon()
	{
	ASSERT(!m_freeLibraryTimer.isActive());
	ASSERT(m_module);
	ASSERT(m_loadCount == 0);

	m_freeLibraryTimer.startOneShot(0);
	}

	void PluginPackage::freeLibraryTimerFired(Timer<PluginPackage>*)
	{
	ASSERT(m_module);
	ASSERT(m_loadCount == 0);

	unloadModule(m_module);
	m_module = 0;
	}


	int PluginPackage::compare(const PluginPackage& compareTo) const
	{
	// Sort plug-ins that allow multiple instances first.
	bool AallowsMultipleInstances = !quirks().contains(PluginQuirkDontAllowMultipleInstances);
	bool BallowsMultipleInstances = !compareTo.quirks().contains(PluginQuirkDontAllowMultipleInstances);
	if (AallowsMultipleInstances != BallowsMultipleInstances)
	return AallowsMultipleInstances ? -1 : 1;

	// Sort plug-ins in a preferred path first.
	bool AisInPreferredDirectory = PluginDatabase::isPreferredPluginDirectory(parentDirectory());
	bool BisInPreferredDirectory = PluginDatabase::isPreferredPluginDirectory(compareTo.parentDirectory());
	if (AisInPreferredDirectory != BisInPreferredDirectory)
	return AisInPreferredDirectory ? -1 : 1;

	int diff = strcmp(name().utf8().data(), compareTo.name().utf8().data());
	if (diff)
	return diff;

	diff = compareFileVersion(compareTo.version());
	if (diff)
	return diff;

	return strcmp(parentDirectory().utf8().data(), compareTo.parentDirectory().utf8().data());
	}

	PluginPackage::PluginPackage(const String& path, const time_t& lastModified)
	: m_isLoaded(false)
	, m_loadCount(0)
	, m_path(path)
	, m_moduleVersion(0)
	, m_module(0)
	, m_lastModified(lastModified)
	, m_freeLibraryTimer(this, &PluginPackage::freeLibraryTimerFired)
	{
	m_fileName = pathGetFileName(m_path);
	m_parentDirectory = m_path.left(m_path.length() - m_fileName.length() - 1);
	}

	void PluginPackage::unload()
	{
	if (!m_isLoaded)
	return;

	if (--m_loadCount > 0)
	return;

	m_NPP_Shutdown();

	unloadWithoutShutdown();
	}

	void PluginPackage::unloadWithoutShutdown()
	{
	if (!m_isLoaded)
	return;

	ASSERT(m_loadCount == 0);
	ASSERT(m_module);

	// <rdar://5530519>: Crash when closing tab with pdf file (Reader 7 only)
	// If the plugin has subclassed its parent window, as with Reader 7, we may have
	// gotten here by way of the plugin's internal window proc forwarding a message to our
	// original window proc. If we free the plugin library from here, we will jump back
	// to code we just freed when we return, so delay calling FreeLibrary at least until
	// the next message loop
	freeLibrarySoon();

	m_isLoaded = false;
	}

	PassRefPtr<PluginPackage> PluginPackage::createPackage(const String& path, const time_t& lastModified)
	{
	RefPtr<PluginPackage> package = adoptRef(new PluginPackage(path, lastModified));

	if (!package->fetchInfo())
	return 0;

	return package.release();
	}

	#if defined(XP_UNIX)
	void PluginPackage::determineQuirks(const String& mimeType)
	{
	if (MIMETypeRegistry::isJavaAppletMIMEType(mimeType)) {
	// Because a single process cannot create multiple VMs, and we cannot reliably unload a
	// Java VM, we cannot unload the Java plugin, or we'll lose reference to our only VM
	m_quirks.add(PluginQuirkDontUnloadPlugin);

	// Setting the window region to an empty region causes bad scrolling repaint problems
	// with the Java plug-in.
	m_quirks.add(PluginQuirkDontClipToZeroRectWhenScrolling);
	return;
	}

	if (mimeType == "application/x-shockwave-flash") {
	static const PlatformModuleVersion flashTenVersion(0x0a000000);

	if (compareFileVersion(flashTenVersion) >= 0) {
	// Flash 10.0 b218 doesn't like having a NULL window handle
	m_quirks.add(PluginQuirkDontSetNullWindowHandleOnDestroy);
	#if PLATFORM(QT)
	m_quirks.add(PluginQuirkRequiresGtkToolKit);
	#endif
	} else {
	// Flash 9 and older requests windowless plugins if we return a mozilla user agent
	m_quirks.add(PluginQuirkWantsMozillaUserAgent);
	}

	m_quirks.add(PluginQuirkThrottleInvalidate);
	m_quirks.add(PluginQuirkThrottleWMUserPlusOneMessages);
	m_quirks.add(PluginQuirkFlashURLNotifyBug);
	}
	}
	#endif

	#if !PLATFORM(WIN_OS)
	void PluginPackage::determineModuleVersionFromDescription()
	{
	// It's a bit lame to detect the plugin version by parsing it
	// from the plugin description string, but it doesn't seem that
	// version information is available in any standardized way at
	// the module level, like in Windows

	if (m_description.isEmpty())
	return;

	if (m_description.startsWith("Shockwave Flash") && m_description.length() >= 19) {
	// The flash version as a PlatformModuleVersion differs on Unix from Windows
	// since the revision can be larger than a 8 bits, so we allow it 16 here and
	// push the major/minor up 8 bits. Thus on Unix, Flash's version may be
	// 0x0a000000 instead of 0x000a0000.

	Vector<String> versionParts;
	m_description.substring(16).split(' ', /allowEmptyEntries =/ false, versionParts);
	if (versionParts.isEmpty())
	return;

	if (versionParts.size() >= 1) {
	Vector<String> majorMinorParts;
	versionParts[0].split('.', majorMinorParts);
	if (majorMinorParts.size() >= 1) {
	bool converted = false;
	unsigned major = majorMinorParts[0].toUInt(&converted);
	if (converted)
	m_moduleVersion = (major & 0xff) << 24;
	}
	if (majorMinorParts.size() == 2) {
	bool converted = false;
	unsigned minor = majorMinorParts[1].toUInt(&converted);
	if (converted)
	m_moduleVersion \|= (minor & 0xff) << 16;
	}
	}

	if (versionParts.size() >= 2) {
	String revision = versionParts[1];
	if (revision.length() > 1 && (revision[0] == 'r' \|\| revision[0] == 'b')) {
	revision.remove(0, 1);
	m_moduleVersion \|= revision.toInt() & 0xffff;
	}
	}
	}
	}
	#endif

	#if ENABLE(NETSCAPE_PLUGIN_API)
	void PluginPackage::initializeBrowserFuncs()
	{
	memset(&m_browserFuncs, 0, sizeof(m_browserFuncs));
	m_browserFuncs.size = sizeof (m_browserFuncs);
	m_browserFuncs.version = NP_VERSION_MINOR;

	m_browserFuncs.geturl = NPN_GetURL;
	m_browserFuncs.posturl = NPN_PostURL;
	m_browserFuncs.requestread = NPN_RequestRead;
	m_browserFuncs.newstream = NPN_NewStream;
	m_browserFuncs.write = NPN_Write;
	m_browserFuncs.destroystream = NPN_DestroyStream;
	m_browserFuncs.status = NPN_Status;
	m_browserFuncs.uagent = NPN_UserAgent;
	m_browserFuncs.memalloc = NPN_MemAlloc;
	m_browserFuncs.memfree = NPN_MemFree;
	m_browserFuncs.memflush = NPN_MemFlush;
	m_browserFuncs.reloadplugins = NPN_ReloadPlugins;
	m_browserFuncs.geturlnotify = NPN_GetURLNotify;
	m_browserFuncs.posturlnotify = NPN_PostURLNotify;
	m_browserFuncs.getvalue = NPN_GetValue;
	m_browserFuncs.setvalue = NPN_SetValue;
	m_browserFuncs.invalidaterect = NPN_InvalidateRect;
	m_browserFuncs.invalidateregion = NPN_InvalidateRegion;
	m_browserFuncs.forceredraw = NPN_ForceRedraw;
	m_browserFuncs.getJavaEnv = NPN_GetJavaEnv;
	m_browserFuncs.getJavaPeer = NPN_GetJavaPeer;
	m_browserFuncs.pushpopupsenabledstate = NPN_PushPopupsEnabledState;
	m_browserFuncs.poppopupsenabledstate = NPN_PopPopupsEnabledState;
	m_browserFuncs.pluginthreadasynccall = NPN_PluginThreadAsyncCall;

	m_browserFuncs.releasevariantvalue = _NPN_ReleaseVariantValue;
	m_browserFuncs.getstringidentifier = _NPN_GetStringIdentifier;
	m_browserFuncs.getstringidentifiers = _NPN_GetStringIdentifiers;
	m_browserFuncs.getintidentifier = _NPN_GetIntIdentifier;
	m_browserFuncs.identifierisstring = _NPN_IdentifierIsString;
	m_browserFuncs.utf8fromidentifier = _NPN_UTF8FromIdentifier;
	m_browserFuncs.intfromidentifier = _NPN_IntFromIdentifier;
	m_browserFuncs.createobject = _NPN_CreateObject;
	m_browserFuncs.retainobject = _NPN_RetainObject;
	m_browserFuncs.releaseobject = _NPN_ReleaseObject;
	m_browserFuncs.invoke = _NPN_Invoke;
	m_browserFuncs.invokeDefault = _NPN_InvokeDefault;
	m_browserFuncs.evaluate = _NPN_Evaluate;
	m_browserFuncs.getproperty = _NPN_GetProperty;
	m_browserFuncs.setproperty = _NPN_SetProperty;
	m_browserFuncs.removeproperty = _NPN_RemoveProperty;
	m_browserFuncs.hasproperty = _NPN_HasProperty;
	m_browserFuncs.hasmethod = _NPN_HasMethod;
	m_browserFuncs.setexception = _NPN_SetException;
	m_browserFuncs.enumerate = _NPN_Enumerate;
	m_browserFuncs.construct = _NPN_Construct;
	}
	#endif

	#if ENABLE(PLUGIN_PACKAGE_SIMPLE_HASH)
	unsigned PluginPackage::hash() const
	{
	unsigned hashCodes[] = {
	m_path.impl()->hash(),
	m_lastModified
	};

	return StringImpl::computeHash(reinterpret_cast<UChar*>(hashCodes), sizeof(hashCodes) / sizeof(UChar));
	}

	bool PluginPackage::equal(const PluginPackage& a, const PluginPackage& b)
	{
	return a.m_description == b.m_description;
	}

	int PluginPackage::compareFileVersion(const PlatformModuleVersion& compareVersion) const
	{
	// return -1, 0, or 1 if plug-in version is less than, equal to, or greater than
	// the passed version
	if (m_moduleVersion != compareVersion)
	return m_moduleVersion > compareVersion ? 1 : -1;
	return 0;
	}
	#endif

	}