Source/WebKitLegacy/mac/Plugins/WebBasePluginPackage.mm - WebKit - Git at Google

 /*
  * Copyright (C) 2005 Apple Inc.  All rights reserved.
  *
  * 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.
  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
  */

 #import "WebBasePluginPackage.h"

 #import "WebKitLogging.h"
 #import "WebKitNSStringExtras.h"
 #import "WebNetscapePluginPackage.h"
 #import "WebPluginPackage.h"
 #import "WebTypesInternal.h"
 #import <JavaScriptCore/InitializeThreading.h>
 #import <algorithm>
 #import <mach-o/arch.h>
 #import <mach-o/fat.h>
 #import <mach-o/loader.h>
 #import <wtf/Assertions.h>
 #import <wtf/MainThread.h>
 #import <wtf/ObjCRuntimeExtras.h>
 #import <wtf/RunLoop.h>
 #import <wtf/Vector.h>
 #import <wtf/text/CString.h>

 #define JavaCocoaPluginIdentifier   "com.apple.JavaPluginCocoa"
 #define JavaCarbonPluginIdentifier  "com.apple.JavaAppletPlugin"

 #define QuickTimeCarbonPluginIdentifier       "com.apple.QuickTime Plugin.plugin"
 #define QuickTimeCocoaPluginIdentifier        "com.apple.quicktime.webplugin"

 @interface NSArray (WebPluginExtensions)
 - (NSArray *)_web_lowercaseStrings;
 @end;

 @implementation WebBasePluginPackage

 + (void)initialize
 {
 #if !PLATFORM(IOS_FAMILY)
     JSC::initializeThreading();
     WTF::initializeMainThreadToProcessMainThread();
     RunLoop::initializeMainRunLoop();
 #endif
 }

 + (WebBasePluginPackage *)pluginWithPath:(NSString *)pluginPath
 {

     WebBasePluginPackage *pluginPackage = [[WebPluginPackage alloc] initWithPath:pluginPath];

     if (!pluginPackage) {
 #if ENABLE(NETSCAPE_PLUGIN_API)
         pluginPackage = [[WebNetscapePluginPackage alloc] initWithPath:pluginPath];
 #else
         return nil;
 #endif
     }

     return [pluginPackage autorelease];
 }

 - (id)initWithPath:(NSString *)pluginPath
 {
     if (!(self = [super init]))
         return nil;

     path = [pluginPath stringByResolvingSymlinksInPath];
     cfBundle = adoptCF(CFBundleCreate(kCFAllocatorDefault, (CFURLRef)[NSURL fileURLWithPath:path]));

     if (!cfBundle) {
         [self release];
         return nil;
     }

     return self;
 }

 - (void)unload
 {
 }

 - (void)createPropertyListFile
 {
     if ([self load] && BP_CreatePluginMIMETypesPreferences) {
         BP_CreatePluginMIMETypesPreferences();
         [self unload];
     }
 }

 - (NSDictionary *)pListForPath:(NSString *)pListPath createFile:(BOOL)createFile
 {
     if (createFile)
         [self createPropertyListFile];

     NSDictionary *pList = nil;
     NSData *data = [NSData dataWithContentsOfFile:pListPath];
     if (data)
         pList = [NSPropertyListSerialization propertyListWithData:data options:kCFPropertyListImmutable format:nil error:nil];

     return pList;
 }

 - (id)_objectForInfoDictionaryKey:(NSString *)key
 {
     CFDictionaryRef bundleInfoDictionary = CFBundleGetInfoDictionary(cfBundle.get());
     if (!bundleInfoDictionary)
         return nil;

     return (__bridge id)CFDictionaryGetValue(bundleInfoDictionary, (__bridge CFStringRef)key);
 }

 - (BOOL)getPluginInfoFromPLists
 {
     if (!cfBundle)
         return NO;

     NSDictionary *MIMETypes = [self _objectForInfoDictionaryKey:WebPluginMIMETypesKey];
     if (!MIMETypes)
         return NO;

     NSEnumerator *keyEnumerator = [MIMETypes keyEnumerator];
     NSDictionary *MIMEDictionary;
     NSString *MIME;

     while ((MIME = [keyEnumerator nextObject]) != nil) {
         MIMEDictionary = [MIMETypes objectForKey:MIME];

         // FIXME: Consider storing disabled MIME types.
         NSNumber *isEnabled = [MIMEDictionary objectForKey:WebPluginTypeEnabledKey];
         if (isEnabled && [isEnabled boolValue] == NO)
             continue;

         WebCore::MimeClassInfo mimeClassInfo;

         NSArray *extensions = [[MIMEDictionary objectForKey:WebPluginExtensionsKey] _web_lowercaseStrings];
         for (NSString *extension in extensions) {
             // The DivX plug-in lists multiple extensions in a comma separated string instead of using
             // multiple array elements in the property list. Work around this here by splitting the
             // extension string into components.
             for (NSString *component in [extension componentsSeparatedByString:@","])
                 mimeClassInfo.extensions.append(component);
         }

         mimeClassInfo.type = String(MIME).convertToASCIILowercase();
         mimeClassInfo.desc = [MIMEDictionary objectForKey:WebPluginTypeDescriptionKey];

         pluginInfo.mimes.append(mimeClassInfo);
     }

     NSString *filename = [(NSString *)path lastPathComponent];
     pluginInfo.file = filename;

     NSString *theName = [self _objectForInfoDictionaryKey:WebPluginNameKey];
     if (!theName)
         theName = filename;
     pluginInfo.name = theName;

     NSString *description = [self _objectForInfoDictionaryKey:WebPluginDescriptionKey];
     if (!description)
         description = filename;
     pluginInfo.desc = description;

     pluginInfo.isApplicationPlugin = false;
     pluginInfo.clientLoadPolicy = WebCore::PluginLoadClientPolicyUndefined;
 #if PLATFORM(MAC)
     pluginInfo.bundleIdentifier = self.bundleIdentifier;
     pluginInfo.versionString = self.bundleVersion;
 #endif

     return YES;
 }

 - (BOOL)load
 {
     if (cfBundle && !BP_CreatePluginMIMETypesPreferences)
         BP_CreatePluginMIMETypesPreferences = (BP_CreatePluginMIMETypesPreferencesFuncPtr)CFBundleGetFunctionPointerForName(cfBundle.get(), CFSTR("BP_CreatePluginMIMETypesPreferences"));

     return YES;
 }

 - (void)dealloc
 {
     ASSERT(!pluginDatabases || [pluginDatabases count] == 0);
     [pluginDatabases release];

     [super dealloc];
 }

 - (const String&)path
 {
     return path;
 }

 - (const WebCore::PluginInfo&)pluginInfo
 {
     return pluginInfo;
 }

 - (BOOL)supportsExtension:(const String&)extension
 {
     ASSERT(extension.convertToASCIILowercase() == extension);

     for (auto& entry : pluginInfo.mimes) {
         if (entry.extensions.contains(extension))
             return YES;
     }

     return NO;
 }

 - (BOOL)supportsMIMEType:(const WTF::String&)mimeType
 {
     ASSERT(mimeType.convertToASCIILowercase() == mimeType);

     for (auto& entry : pluginInfo.mimes) {
         if (entry.type == mimeType)
             return YES;
     }

     return NO;
 }

 - (NSString *)MIMETypeForExtension:(const String&)extension
 {
     ASSERT(extension.convertToASCIILowercase() == extension);

     for (auto& entry : pluginInfo.mimes) {
         if (entry.extensions.contains(extension))
             return entry.type;
     }

     return nil;
 }

 - (BOOL)isQuickTimePlugIn
 {
     const String& bundleIdentifier = [self bundleIdentifier];
     return bundleIdentifier == QuickTimeCocoaPluginIdentifier || bundleIdentifier == QuickTimeCocoaPluginIdentifier;
 }

 - (BOOL)isJavaPlugIn
 {
     const String& bundleIdentifier = [self bundleIdentifier];
     return bundleIdentifier == JavaCocoaPluginIdentifier || bundleIdentifier == JavaCarbonPluginIdentifier;
 }

 static inline void swapIntsInHeader(uint32_t* rawData, size_t length)
 {
     for (size_t i = 0; i < length; ++i)
         rawData[i] = OSSwapInt32(rawData[i]);
 }

 - (BOOL)isNativeLibraryData:(NSData *)data
 {
     NSUInteger sizeInBytes = [data length];
     Vector<uint32_t, 128> rawData((sizeInBytes + 3) / 4);
     memcpy(rawData.data(), [data bytes], sizeInBytes);

     unsigned numArchs = 0;
     struct fat_arch singleArch = { 0, 0, 0, 0, 0 };
     struct fat_arch* archs = 0;

     if (sizeInBytes >= sizeof(struct mach_header_64)) {
         uint32_t magic = *rawData.data();

         if (magic == MH_MAGIC || magic == MH_CIGAM) {
             // We have a 32-bit thin binary
             struct mach_header* header = (struct mach_header*)rawData.data();

             // Check if we need to swap the bytes
             if (magic == MH_CIGAM)
                 swapIntsInHeader(rawData.data(), rawData.size());

             singleArch.cputype = header->cputype;
             singleArch.cpusubtype = header->cpusubtype;

             archs = &singleArch;
             numArchs = 1;
         } else if (magic == MH_MAGIC_64 || magic == MH_CIGAM_64) {
             // We have a 64-bit thin binary
             struct mach_header_64* header = (struct mach_header_64*)rawData.data();

             // Check if we need to swap the bytes
             if (magic == MH_CIGAM_64)
                 swapIntsInHeader(rawData.data(), rawData.size());

             singleArch.cputype = header->cputype;
             singleArch.cpusubtype = header->cpusubtype;

             archs = &singleArch;
             numArchs = 1;
         } else if (magic == FAT_MAGIC || magic == FAT_CIGAM) {
             // We have a fat (universal) binary

             // Check if we need to swap the bytes
             if (magic == FAT_CIGAM)
                 swapIntsInHeader(rawData.data(), rawData.size());

             COMPILE_ASSERT(sizeof(struct fat_header) % sizeof(uint32_t) == 0, struct_fat_header_must_be_integral_size_of_uint32_t);
             archs = reinterpret_cast<struct fat_arch*>(rawData.data() + sizeof(struct fat_header) / sizeof(uint32_t));
             numArchs = reinterpret_cast<struct fat_header*>(rawData.data())->nfat_arch;

             unsigned maxArchs = (sizeInBytes - sizeof(struct fat_header)) / sizeof(struct fat_arch);
             if (numArchs > maxArchs)
                 numArchs = maxArchs;
         }
     }

     if (!archs || !numArchs)
         return NO;

     const NXArchInfo* localArch = NXGetLocalArchInfo();
     if (!localArch)
         return NO;

     cpu_type_t cputype = localArch->cputype;
     cpu_subtype_t cpusubtype = localArch->cpusubtype;

 #ifdef __x86_64__
     // NXGetLocalArchInfo returns CPU_TYPE_X86 even when running in 64-bit.
     // See <rdar://problem/4996965> for more information.
     cputype = CPU_TYPE_X86_64;
 #endif

     return NXFindBestFatArch(cputype, cpusubtype, archs, numArchs) != 0;
 }

 - (UInt32)versionNumber
 {
     // CFBundleGetVersionNumber doesn't work with all possible versioning schemes, but we think for now it's good enough for us.
     return CFBundleGetVersionNumber(cfBundle.get());
 }

 - (void)wasAddedToPluginDatabase:(WebPluginDatabase *)database
 {
     if (!pluginDatabases)
         pluginDatabases = [[NSMutableSet alloc] init];

     ASSERT(![pluginDatabases containsObject:database]);
     [pluginDatabases addObject:database];
 }

 - (void)wasRemovedFromPluginDatabase:(WebPluginDatabase *)database
 {
     ASSERT(pluginDatabases);
     ASSERT([pluginDatabases containsObject:database]);

     [pluginDatabases removeObject:database];
 }

 - (String)bundleIdentifier
 {
     return CFBundleGetIdentifier(cfBundle.get());
 }

 - (String)bundleVersion
 {
     CFDictionaryRef infoDictionary = CFBundleGetInfoDictionary(cfBundle.get());
     if (!infoDictionary)
         return String();

     CFTypeRef bundleVersionString = CFDictionaryGetValue(infoDictionary, kCFBundleVersionKey);
     if (!bundleVersionString || CFGetTypeID(bundleVersionString) != CFStringGetTypeID())
         return String();

     return reinterpret_cast<CFStringRef>(bundleVersionString);
 }

 @end

 @implementation NSArray (WebPluginExtensions)

 - (NSArray *)_web_lowercaseStrings
 {
     NSMutableArray *lowercaseStrings = [NSMutableArray arrayWithCapacity:[self count]];
     NSEnumerator *strings = [self objectEnumerator];
     NSString *string;

     while ((string = [strings nextObject]) != nil) {
         if ([string isKindOfClass:[NSString class]])
             [lowercaseStrings addObject:[string lowercaseString]];
     }

     return lowercaseStrings;
 }

 @end
	/*
	* Copyright (C) 2005 Apple Inc. All rights reserved.
	*
	* 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.
	* 3. Neither the name of Apple Inc. ("Apple") nor the names of
	* its contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
	*/

	#import "WebBasePluginPackage.h"

	#import "WebKitLogging.h"
	#import "WebKitNSStringExtras.h"
	#import "WebNetscapePluginPackage.h"
	#import "WebPluginPackage.h"
	#import "WebTypesInternal.h"
	#import <JavaScriptCore/InitializeThreading.h>
	#import <algorithm>
	#import <mach-o/arch.h>
	#import <mach-o/fat.h>
	#import <mach-o/loader.h>
	#import <wtf/Assertions.h>
	#import <wtf/MainThread.h>
	#import <wtf/ObjCRuntimeExtras.h>
	#import <wtf/RunLoop.h>
	#import <wtf/Vector.h>
	#import <wtf/text/CString.h>

	#define JavaCocoaPluginIdentifier "com.apple.JavaPluginCocoa"
	#define JavaCarbonPluginIdentifier "com.apple.JavaAppletPlugin"

	#define QuickTimeCarbonPluginIdentifier "com.apple.QuickTime Plugin.plugin"
	#define QuickTimeCocoaPluginIdentifier "com.apple.quicktime.webplugin"

	@interface NSArray (WebPluginExtensions)
	- (NSArray *)_web_lowercaseStrings;
	@end;

	@implementation WebBasePluginPackage

	+ (void)initialize
	{
	#if !PLATFORM(IOS_FAMILY)
	JSC::initializeThreading();
	WTF::initializeMainThreadToProcessMainThread();
	RunLoop::initializeMainRunLoop();
	#endif
	}

	+ (WebBasePluginPackage )pluginWithPath:(NSString )pluginPath
	{

	WebBasePluginPackage *pluginPackage = [[WebPluginPackage alloc] initWithPath:pluginPath];

	if (!pluginPackage) {
	#if ENABLE(NETSCAPE_PLUGIN_API)
	pluginPackage = [[WebNetscapePluginPackage alloc] initWithPath:pluginPath];
	#else
	return nil;
	#endif
	}

	return [pluginPackage autorelease];
	}

	- (id)initWithPath:(NSString *)pluginPath
	{
	if (!(self = [super init]))
	return nil;

	path = [pluginPath stringByResolvingSymlinksInPath];
	cfBundle = adoptCF(CFBundleCreate(kCFAllocatorDefault, (CFURLRef)[NSURL fileURLWithPath:path]));

	if (!cfBundle) {
	[self release];
	return nil;
	}

	return self;
	}

	- (void)unload
	{
	}

	- (void)createPropertyListFile
	{
	if ([self load] && BP_CreatePluginMIMETypesPreferences) {
	BP_CreatePluginMIMETypesPreferences();
	[self unload];
	}
	}

	- (NSDictionary )pListForPath:(NSString )pListPath createFile:(BOOL)createFile
	{
	if (createFile)
	[self createPropertyListFile];

	NSDictionary *pList = nil;
	NSData *data = [NSData dataWithContentsOfFile:pListPath];
	if (data)
	pList = [NSPropertyListSerialization propertyListWithData:data options:kCFPropertyListImmutable format:nil error:nil];

	return pList;
	}

	- (id)_objectForInfoDictionaryKey:(NSString *)key
	{
	CFDictionaryRef bundleInfoDictionary = CFBundleGetInfoDictionary(cfBundle.get());
	if (!bundleInfoDictionary)
	return nil;

	return (__bridge id)CFDictionaryGetValue(bundleInfoDictionary, (__bridge CFStringRef)key);
	}

	- (BOOL)getPluginInfoFromPLists
	{
	if (!cfBundle)
	return NO;

	NSDictionary *MIMETypes = [self _objectForInfoDictionaryKey:WebPluginMIMETypesKey];
	if (!MIMETypes)
	return NO;

	NSEnumerator *keyEnumerator = [MIMETypes keyEnumerator];
	NSDictionary *MIMEDictionary;
	NSString *MIME;

	while ((MIME = [keyEnumerator nextObject]) != nil) {
	MIMEDictionary = [MIMETypes objectForKey:MIME];

	// FIXME: Consider storing disabled MIME types.
	NSNumber *isEnabled = [MIMEDictionary objectForKey:WebPluginTypeEnabledKey];
	if (isEnabled && [isEnabled boolValue] == NO)
	continue;

	WebCore::MimeClassInfo mimeClassInfo;

	NSArray *extensions = [[MIMEDictionary objectForKey:WebPluginExtensionsKey] _web_lowercaseStrings];
	for (NSString *extension in extensions) {
	// The DivX plug-in lists multiple extensions in a comma separated string instead of using
	// multiple array elements in the property list. Work around this here by splitting the
	// extension string into components.
	for (NSString *component in [extension componentsSeparatedByString:@","])
	mimeClassInfo.extensions.append(component);
	}

	mimeClassInfo.type = String(MIME).convertToASCIILowercase();
	mimeClassInfo.desc = [MIMEDictionary objectForKey:WebPluginTypeDescriptionKey];

	pluginInfo.mimes.append(mimeClassInfo);
	}

	NSString filename = [(NSString )path lastPathComponent];
	pluginInfo.file = filename;

	NSString *theName = [self _objectForInfoDictionaryKey:WebPluginNameKey];
	if (!theName)
	theName = filename;
	pluginInfo.name = theName;

	NSString *description = [self _objectForInfoDictionaryKey:WebPluginDescriptionKey];
	if (!description)
	description = filename;
	pluginInfo.desc = description;

	pluginInfo.isApplicationPlugin = false;
	pluginInfo.clientLoadPolicy = WebCore::PluginLoadClientPolicyUndefined;
	#if PLATFORM(MAC)
	pluginInfo.bundleIdentifier = self.bundleIdentifier;
	pluginInfo.versionString = self.bundleVersion;
	#endif

	return YES;
	}

	- (BOOL)load
	{
	if (cfBundle && !BP_CreatePluginMIMETypesPreferences)
	BP_CreatePluginMIMETypesPreferences = (BP_CreatePluginMIMETypesPreferencesFuncPtr)CFBundleGetFunctionPointerForName(cfBundle.get(), CFSTR("BP_CreatePluginMIMETypesPreferences"));

	return YES;
	}

	- (void)dealloc
	{
	ASSERT(!pluginDatabases \|\| [pluginDatabases count] == 0);
	[pluginDatabases release];

	[super dealloc];
	}

	- (const String&)path
	{
	return path;
	}

	- (const WebCore::PluginInfo&)pluginInfo
	{
	return pluginInfo;
	}

	- (BOOL)supportsExtension:(const String&)extension
	{
	ASSERT(extension.convertToASCIILowercase() == extension);

	for (auto& entry : pluginInfo.mimes) {
	if (entry.extensions.contains(extension))
	return YES;
	}

	return NO;
	}

	- (BOOL)supportsMIMEType:(const WTF::String&)mimeType
	{
	ASSERT(mimeType.convertToASCIILowercase() == mimeType);

	for (auto& entry : pluginInfo.mimes) {
	if (entry.type == mimeType)
	return YES;
	}

	return NO;
	}

	- (NSString *)MIMETypeForExtension:(const String&)extension
	{
	ASSERT(extension.convertToASCIILowercase() == extension);

	for (auto& entry : pluginInfo.mimes) {
	if (entry.extensions.contains(extension))
	return entry.type;
	}

	return nil;
	}

	- (BOOL)isQuickTimePlugIn
	{
	const String& bundleIdentifier = [self bundleIdentifier];
	return bundleIdentifier == QuickTimeCocoaPluginIdentifier \|\| bundleIdentifier == QuickTimeCocoaPluginIdentifier;
	}

	- (BOOL)isJavaPlugIn
	{
	const String& bundleIdentifier = [self bundleIdentifier];
	return bundleIdentifier == JavaCocoaPluginIdentifier \|\| bundleIdentifier == JavaCarbonPluginIdentifier;
	}

	static inline void swapIntsInHeader(uint32_t* rawData, size_t length)
	{
	for (size_t i = 0; i < length; ++i)
	rawData[i] = OSSwapInt32(rawData[i]);
	}

	- (BOOL)isNativeLibraryData:(NSData *)data
	{
	NSUInteger sizeInBytes = [data length];
	Vector<uint32_t, 128> rawData((sizeInBytes + 3) / 4);
	memcpy(rawData.data(), [data bytes], sizeInBytes);

	unsigned numArchs = 0;
	struct fat_arch singleArch = { 0, 0, 0, 0, 0 };
	struct fat_arch* archs = 0;

	if (sizeInBytes >= sizeof(struct mach_header_64)) {
	uint32_t magic = *rawData.data();

	if (magic == MH_MAGIC \|\| magic == MH_CIGAM) {
	// We have a 32-bit thin binary
	struct mach_header* header = (struct mach_header*)rawData.data();

	// Check if we need to swap the bytes
	if (magic == MH_CIGAM)
	swapIntsInHeader(rawData.data(), rawData.size());

	singleArch.cputype = header->cputype;
	singleArch.cpusubtype = header->cpusubtype;

	archs = &singleArch;
	numArchs = 1;
	} else if (magic == MH_MAGIC_64 \|\| magic == MH_CIGAM_64) {
	// We have a 64-bit thin binary
	struct mach_header_64* header = (struct mach_header_64*)rawData.data();

	// Check if we need to swap the bytes
	if (magic == MH_CIGAM_64)
	swapIntsInHeader(rawData.data(), rawData.size());

	singleArch.cputype = header->cputype;
	singleArch.cpusubtype = header->cpusubtype;

	archs = &singleArch;
	numArchs = 1;
	} else if (magic == FAT_MAGIC \|\| magic == FAT_CIGAM) {
	// We have a fat (universal) binary

	// Check if we need to swap the bytes
	if (magic == FAT_CIGAM)
	swapIntsInHeader(rawData.data(), rawData.size());

	COMPILE_ASSERT(sizeof(struct fat_header) % sizeof(uint32_t) == 0, struct_fat_header_must_be_integral_size_of_uint32_t);
	archs = reinterpret_cast<struct fat_arch*>(rawData.data() + sizeof(struct fat_header) / sizeof(uint32_t));
	numArchs = reinterpret_cast<struct fat_header*>(rawData.data())->nfat_arch;

	unsigned maxArchs = (sizeInBytes - sizeof(struct fat_header)) / sizeof(struct fat_arch);
	if (numArchs > maxArchs)
	numArchs = maxArchs;
	}
	}

	if (!archs \|\| !numArchs)
	return NO;

	const NXArchInfo* localArch = NXGetLocalArchInfo();
	if (!localArch)
	return NO;

	cpu_type_t cputype = localArch->cputype;
	cpu_subtype_t cpusubtype = localArch->cpusubtype;

	#ifdef __x86_64__
	// NXGetLocalArchInfo returns CPU_TYPE_X86 even when running in 64-bit.
	// See <rdar://problem/4996965> for more information.
	cputype = CPU_TYPE_X86_64;
	#endif

	return NXFindBestFatArch(cputype, cpusubtype, archs, numArchs) != 0;
	}

	- (UInt32)versionNumber
	{
	// CFBundleGetVersionNumber doesn't work with all possible versioning schemes, but we think for now it's good enough for us.
	return CFBundleGetVersionNumber(cfBundle.get());
	}

	- (void)wasAddedToPluginDatabase:(WebPluginDatabase *)database
	{
	if (!pluginDatabases)
	pluginDatabases = [[NSMutableSet alloc] init];

	ASSERT(![pluginDatabases containsObject:database]);
	[pluginDatabases addObject:database];
	}

	- (void)wasRemovedFromPluginDatabase:(WebPluginDatabase *)database
	{
	ASSERT(pluginDatabases);
	ASSERT([pluginDatabases containsObject:database]);

	[pluginDatabases removeObject:database];
	}

	- (String)bundleIdentifier
	{
	return CFBundleGetIdentifier(cfBundle.get());
	}

	- (String)bundleVersion
	{
	CFDictionaryRef infoDictionary = CFBundleGetInfoDictionary(cfBundle.get());
	if (!infoDictionary)
	return String();

	CFTypeRef bundleVersionString = CFDictionaryGetValue(infoDictionary, kCFBundleVersionKey);
	if (!bundleVersionString \|\| CFGetTypeID(bundleVersionString) != CFStringGetTypeID())
	return String();

	return reinterpret_cast<CFStringRef>(bundleVersionString);
	}

	@end

	@implementation NSArray (WebPluginExtensions)

	- (NSArray *)_web_lowercaseStrings
	{
	NSMutableArray *lowercaseStrings = [NSMutableArray arrayWithCapacity:[self count]];
	NSEnumerator *strings = [self objectEnumerator];
	NSString *string;

	while ((string = [strings nextObject]) != nil) {
	if ([string isKindOfClass:[NSString class]])
	[lowercaseStrings addObject:[string lowercaseString]];
	}

	return lowercaseStrings;
	}

	@end