Types and Constants

Time interval between the unix standard reference date of 1 January 1970 and the OpenStep reference date of 1 January 2001
This number comes from:
(((31 years * 365 days) + 8 days for leap years) = total number of days
24 hours * 60 minutes * 60 seconds)
This ignores leap-seconds.

NSDistributedNotificationCenter constants

GSNetworkNotificationCenterType

NSString* const GSNetworkNotificationCenterType;

Availability: Not in OpenStep/MacOS-X

Type of [NSDistributedNotificationCenter +notificationCenterForType:] - localhost and LAN broadcast. This type is available only on GNUstep.

GSPublicNotificationCenterType

NSString* const GSPublicNotificationCenterType;

Availability: Not in OpenStep/MacOS-X

Type of [NSDistributedNotificationCenter +notificationCenterForType:] - all users on the local host. This type is available only on GNUstep.

NSLocalNotificationCenterType

NSString* const NSLocalNotificationCenterType;

Availability: MacOS-X 10.0.0

Type for [NSDistributedNotificationCenter +notificationCenterForType:] - localhost current user broadcast only. This is the only type on OS X.

NSError constants

NSFilePathErrorKey

NSString* const NSFilePathErrorKey;

Availability: MacOS-X 10.4.0

This key can be used to store the file path of a resource involved in the error (eg unreadable file).

NSLocalizedDescriptionKey

NSString* const NSLocalizedDescriptionKey;

Availability: MacOS-X 10.3.0

Key for user info dictionary component which describes the error in a human readable format.

NSLocalizedFailureReasonErrorKey

NSString* const NSLocalizedFailureReasonErrorKey;

Availability: MacOS-X 10.4.0

Key to store a string describing what caused the error to occur.

NSLocalizedRecoveryOptionsErrorKey

NSString* const NSLocalizedRecoveryOptionsErrorKey;

Availability: MacOS-X 10.4.0

Key to store an NSArray of strings suitable for use as the titles of buttons in an alert panel used to attempt error recovery in a GUI application.

NSLocalizedRecoverySuggestionErrorKey

NSString* const NSLocalizedRecoverySuggestionErrorKey;

Availability: MacOS-X 10.4.0

Key to store a string providing a hint on how to use the buttons in an alert panel.

NSRecoveryAttempterErrorKey

NSString* const NSRecoveryAttempterErrorKey;

Availability: MacOS-X 10.4.0

Key to store an object which can be used to attempt to recover from the error.

NSStringEncodingErrorKey

NSString* const NSStringEncodingErrorKey;

Availability: MacOS-X 10.4.0

Key for an NSNumber containing an NSStringEncoding value.

NSURLErrorFailingURLErrorKey

NSString* const NSURLErrorFailingURLErrorKey;

Availability: MacOS-X 10.6.0

NSURL to indicate the URL which did not load, in the NSURLErrorDomain.

NSURLErrorFailingURLStringErrorKey

NSString* const NSURLErrorFailingURLStringErrorKey;

Availability: MacOS-X 10.6.0

NSString in the NSURLDomain to indicate the object for the URL that did not load. This supersedes NSErrorFailingURLStringKey

NSURLErrorKey

NSString* const NSURLErrorKey;

Availability: MacOS-X 10.4.0

This can be used to store the URLK involved in the error.

NSUnderlyingErrorKey

NSString* const NSUnderlyingErrorKey;

Availability: MacOS-X 10.3.0

Where one error has caused another, the underlying error can be stored in the user info dictionary using this key.

NSException constants

Description forthcoming.

NSExtensionHostDidEnterBackgroundNotification

NSString* const NSExtensionHostDidEnterBackgroundNotification;

Availability: MacOS-X 10.10.0

Description forthcoming.

NSExtensionHostWillEnterForegroundNotification

NSString* const NSExtensionHostWillEnterForegroundNotification;

Availability: MacOS-X 10.10.0

Description forthcoming.

NSExtensionHostWillResignActiveNotification

NSString* const NSExtensionHostWillResignActiveNotification;

Availability: MacOS-X 10.10.0

Description forthcoming.

NSExtensionItemsAndErrorsKey

NSString* const NSExtensionItemsAndErrorsKey;

GSFileHandleConnectCompletionNotification

NSString* const GSFileHandleConnectCompletionNotification;

Availability: Not in OpenStep/MacOS-X

Notification posted when an asynchronous NSFileHandle connection attempt (to an FTP, HTTP, or other internet server) has succeeded.

GSFileHandleNotificationError

NSString* const GSFileHandleNotificationError;

Availability: Not in OpenStep/MacOS-X

Message describing error in asynchronous NSFileHandle accept,read,write operation.

GSFileHandleWriteCompletionNotification

NSString* const GSFileHandleWriteCompletionNotification;

Availability: Not in OpenStep/MacOS-X

Notification posted when an asynchronous NSFileHandle write operation (to an FTP, HTTP, or other internet server) has succeeded.

GSTLSCAFile

NSString* const GSTLSCAFile;

Availability: Not in OpenStep/MacOS-X

Dictionary key for the path to a PEM encoded certificate authority file.

GSTLSCertificateFile

NSString* const GSTLSCertificateFile;

Availability: Not in OpenStep/MacOS-X

Dictionary key for the path to a PEM encoded certificate used to identify this end of a connection.

GSTLSCertificateKeyFile

NSString* const GSTLSCertificateKeyFile;

Availability: Not in OpenStep/MacOS-X

Dictionary key for the path to a PEM encoded private key used to unlock the certificate used by this end of a connection.

GSTLSCertificateKeyPassword

NSString* const GSTLSCertificateKeyPassword;

Availability: Not in OpenStep/MacOS-X

Dictionary key for the password used to decrypt the key file used to unlock the certificate used by this end of a connection.

GSTLSDebug

NSString* const GSTLSDebug;

Availability: Not in OpenStep/MacOS-X

Dictionary key for a boolean to enable TLS debug for a session.

GSTLSIssuers

NSString* const GSTLSIssuers;

Availability: Not in OpenStep/MacOS-X

Dictionary key for an array of issuers to use in certificate verification.

GSTLSOwners

NSString* const GSTLSOwners;

Availability: Not in OpenStep/MacOS-X

Dictionary key for an array of owners to use in certificate verification.

GSTLSPriority

NSString* const GSTLSPriority;

Availability: Not in OpenStep/MacOS-X

Dictionary key for a GNUTLS priority setting for a session.

GSTLSRemoteHosts

NSString* const GSTLSRemoteHosts;

Availability: Not in OpenStep/MacOS-X

Dictionary key for a list of hosts to use in certificate verification.

GSTLSRevokeFile

NSString* const GSTLSRevokeFile;

Availability: Not in OpenStep/MacOS-X

Dictionary key for the path to a PEM encoded certificate revocation file.

GSTLSServerName

NSString* const GSTLSServerName;

Availability: Not in OpenStep/MacOS-X

Dictionary key for the value controlling the Server Name Indication (SNI) sent as part of the TLS handshake.

GSTLSVerify

NSString* const GSTLSVerify;

Availability: Not in OpenStep/MacOS-X

Dictionary key for a boolean to enable certificate verification.

NSFileHandleConnectionAcceptedNotification

NSString* const NSFileHandleConnectionAcceptedNotification;

Availability: OpenStep

Posted when one of the NSFileHandle methods acceptConnectionInBackground... succeeds and has connected to a stream-type socket in another process. The notification's userInfo dictionary will contain the NSFileHandle for the near end of the connection (associated to the key '


                NSFileHandleNotificationFileHandleItem

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileCreationDate

NSString* const NSFileCreationDate;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileDeviceIdentifier

NSString* const NSFileDeviceIdentifier;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileExtensionHidden

NSString* const NSFileExtensionHidden;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileGroupOwnerAccountID

NSString* const NSFileGroupOwnerAccountID;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileGroupOwnerAccountName

NSString* const NSFileGroupOwnerAccountName;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileHFSCreatorCode

NSString* const NSFileHFSCreatorCode;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileHFSTypeCode

NSString* const NSFileHFSTypeCode;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileImmutable

NSString* const NSFileImmutable;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileModificationDate

NSString* const NSFileModificationDate;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileOwnerAccountID

NSString* const NSFileOwnerAccountID;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileOwnerAccountName

NSString* const NSFileOwnerAccountName;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFilePosixPermissions

NSString* const NSFilePosixPermissions;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileReferenceCount

NSString* const NSFileReferenceCount;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileSize

NSString* const NSFileSize;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileSystemFileNumber

NSString* const NSFileSystemFileNumber;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileSystemFreeNodes

NSString* const NSFileSystemFreeNodes;

Availability: MacOS-X 10.0.0

File system attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileSystemFreeSize

NSString* const NSFileSystemFreeSize;

Availability: MacOS-X 10.0.0

File system attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileSystemNodes

NSString* const NSFileSystemNodes;

Availability: MacOS-X 10.0.0

File system attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileSystemNumber

NSString* const NSFileSystemNumber;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileSystemSize

NSString* const NSFileSystemSize;

Availability: MacOS-X 10.0.0

File system attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileType

NSString* const NSFileType;

Availability: MacOS-X 10.0.0

File attribute key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeBlockSpecial

NSString* const NSFileTypeBlockSpecial;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeCharacterSpecial

NSString* const NSFileTypeCharacterSpecial;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeDirectory

NSString* const NSFileTypeDirectory;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeFifo

NSString* const NSFileTypeFifo;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeRegular

NSString* const NSFileTypeRegular;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeSocket

NSString* const NSFileTypeSocket;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeSymbolicLink

NSString* const NSFileTypeSymbolicLink;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSFileTypeUnknown

NSString* const NSFileTypeUnknown;

Availability: MacOS-X 10.0.0

Possible value for ' NSFileType ' key in dictionary returned by [NSFileManager -fileAttributesAtPath:traverseLink:] .

NSGeometry constants

NSEdgeInsetsZero

const NSEdgeInsets NSEdgeInsetsZero;

Availability: MacOS-X 10.7.0

Zero edge insets

NSZeroPoint

const NSPoint NSZeroPoint;

Availability: OpenStep

Point at 0,0

NSZeroRect

const NSRect NSZeroRect;

Availability: OpenStep

Zero-size rectangle at 0,0

NSZeroSize

const NSSize NSZeroSize;

NSHTTPCookieComment

NSString* const NSHTTPCookieComment;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain text of the comment

NSHTTPCookieCommentURL

NSString* const NSHTTPCookieCommentURL;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain the comment URL

NSHTTPCookieDiscard

NSString* const NSHTTPCookieDiscard;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain the sessions discard setting

NSHTTPCookieDomain

NSString* const NSHTTPCookieDomain;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain cookie domain

NSHTTPCookieExpires

NSString* const NSHTTPCookieExpires;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain cookie expiry date

NSHTTPCookieMaximumAge

NSString* const NSHTTPCookieMaximumAge;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain maximum age (expiry)

NSHTTPCookieName

NSString* const NSHTTPCookieName;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain name of cookie

NSHTTPCookieOriginURL

NSString* const NSHTTPCookieOriginURL;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain cookie origin URL

NSHTTPCookiePath

NSString* const NSHTTPCookiePath;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain cookie path

NSHTTPCookiePort

NSString* const NSHTTPCookiePort;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain cookie ports

NSHTTPCookieSecure

NSString* const NSHTTPCookieSecure;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain cookie security

NSHTTPCookieValue

NSString* const NSHTTPCookieValue;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain value of cookie

NSHTTPCookieVersion

NSString* const NSHTTPCookieVersion;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain cookie version

NSHTTPCookieStorage constants

NSHTTPCookieManagerAcceptPolicyChangedNotification

NSString* const NSHTTPCookieManagerAcceptPolicyChangedNotification;

Availability: MacOS-X 10.2.0, Base 1.13.0

Posted to the distributed notification center when the cookie accept policy is changed.

NSHTTPCookieManagerCookiesChangedNotification

NSString* const NSHTTPCookieManagerCookiesChangedNotification;

Availability: MacOS-X 10.2.0, Base 1.13.0

Posted when the set of cookies changes

NSInvocationOperation constants

NSInvocationOperationCancelledException

NSString* const NSInvocationOperationCancelledException;

Availability: MacOS-X 10.5.0

Description forthcoming.

NSInvocationOperationVoidResultException

NSString* const NSInvocationOperationVoidResultException;

NSInvalidArchiveOperationException

NSString* const NSInvalidArchiveOperationException;

Availability: MacOS-X 10.0.0

Description forthcoming.

NSInvalidUnarchiveOperationException

NSString* const NSInvalidUnarchiveOperationException;

Availability: MacOS-X 10.0.0

Description forthcoming.

NSKeyValueCoding constants

NSUndefinedKeyException

NSString* const NSUndefinedKeyException;

NSNetServicesErrorCode

NSString* const NSNetServicesErrorCode;

Availability: OpenStep

Description forthcoming.

NSNetServicesErrorDomain

NSString* const NSNetServicesErrorDomain;

NSPortDidBecomeInvalidNotification

NSString* const NSPortDidBecomeInvalidNotification;

NSGrammarCorrections

NSString* const NSGrammarCorrections;

Availability: MacOS-X 10.5.0

Description forthcoming.

NSGrammarRange

NSString* const NSGrammarRange;

Availability: MacOS-X 10.5.0

Description forthcoming.

NSGrammarUserDescription

NSString* const NSGrammarUserDescription;

NSTaskDidTerminateNotification

NSString* const NSTaskDidTerminateNotification;

Availability: OpenStep

Notification posted when an NSTask terminates, either due to the subprocess ending or the [NSTask -terminate] method explicitly being called.

NSThread constants

NSThreadDidStartNotification

NSString* const NSThreadDidStartNotification;

Availability: Base
Likely to be changed/moved/removed at 0.0.0

Notification posted whenever a new thread is started up. This is a GNUstep extension.

NSThreadWillExitNotification

NSString* const NSThreadWillExitNotification;

Availability: OpenStep

Notification posted when an NSThread instance receives an exit message, or an external thread has been deregistered.

NSWillBecomeMultiThreadedNotification

NSString* const NSWillBecomeMultiThreadedNotification;

Availability: OpenStep

Notification posted the first time a new NSThread is created or a separate thread from another library is registered in an application. (The initial thread that a program starts with does not post this notification.) Before such a notification has been posted you can assume the application is in single-threaded mode and locks are not necessary. Afterwards multiple threads may be running.

NSTimeZone constants

NSSystemTimeZoneDidChangeNotification

NSString* const NSSystemTimeZoneDidChangeNotification;

NSUndoManagerCheckpointNotification

NSString* const NSUndoManagerCheckpointNotification;

Availability: MacOS-X 10.0.0

Notification posted whenever NSUndoManager opens or closes an undo group. The undo manager itself is the notification object, with no userInfo dictionary.

NSUndoManagerDidOpenUndoGroupNotification

NSString* const NSUndoManagerDidOpenUndoGroupNotification;

Availability: MacOS-X 10.0.0

Notification posted after an NSUndoManager opens an undo group.

NSUndoManagerDidRedoChangeNotification

NSString* const NSUndoManagerDidRedoChangeNotification;

Availability: MacOS-X 10.0.0

Notification posted after an NSUndoManager executes a redo operation.

NSUndoManagerDidUndoChangeNotification

NSString* const NSUndoManagerDidUndoChangeNotification;

Availability: MacOS-X 10.0.0

Notification posted after an NSUndoManager executes an undo operation.

NSUndoManagerWillCloseUndoGroupNotification

NSString* const NSUndoManagerWillCloseUndoGroupNotification;

Availability: MacOS-X 10.0.0

Notification posted before an NSUndoManager closes an undo group.

NSUndoManagerWillRedoChangeNotification

NSString* const NSUndoManagerWillRedoChangeNotification;

Availability: MacOS-X 10.0.0

Notification posted before an NSUndoManager will execute a redo operation.

NSUndoManagerWillUndoChangeNotification

NSString* const NSUndoManagerWillUndoChangeNotification;

Availability: MacOS-X 10.0.0

Notification posted before an NSUndoManager will execute an undo operation.

NSURLCredentialStorage constants

NSURLCredentialStorageChangedNotification

NSString* const NSURLCredentialStorageChangedNotification;

Availability: MacOS-X 10.2.0, Base 1.13.0

Notification sent when the set of stored credentials changes.

NSURLError constants

NSErrorFailingURLStringKey

NSString* const NSErrorFailingURLStringKey;

Availability: MacOS-X 10.2.0, Base 1.13.0

Obtain the URL which caused the failure

NSURLErrorDomain

NSString* const NSURLErrorDomain;

NSString* const NSURLVolumeUUIDStringKey;

Availability: MacOS-X 10.7.0

Description forthcoming.

NSURLHandle constants

GSHTTPPropertyCertificateFileKey

NSString* const GSHTTPPropertyCertificateFileKey;

Availability: Not in OpenStep/MacOS-X

Key for passing to NSURLHandle 's propertyForKey.. methods to specify the location of an SSL certificate file.

GSHTTPPropertyKeyFileKey

NSString* const GSHTTPPropertyKeyFileKey;

Availability: Not in OpenStep/MacOS-X

Key for passing to NSURLHandle 's propertyForKey.. methods to specify the location of an SSL key file.

GSHTTPPropertyLocalHostKey

NSString* const GSHTTPPropertyLocalHostKey;

Availability: Not in OpenStep/MacOS-X

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain local host.

GSHTTPPropertyMethodKey

NSString* const GSHTTPPropertyMethodKey;

Availability: Not in OpenStep/MacOS-X

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain method (GET, POST, etc.).

GSHTTPPropertyPasswordKey

NSString* const GSHTTPPropertyPasswordKey;

Availability: Not in OpenStep/MacOS-X

Key for passing to NSURLHandle 's propertyForKey.. methods to specify the password for an SSL key file.

GSHTTPPropertyProxyHostKey

NSString* const GSHTTPPropertyProxyHostKey;

Availability: Not in OpenStep/MacOS-X

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain proxy host.

GSHTTPPropertyProxyPortKey

NSString* const GSHTTPPropertyProxyPortKey;

Availability: Not in OpenStep/MacOS-X

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain proxy port.

NSHTTPPropertyErrorPageDataKey

NSString* const NSHTTPPropertyErrorPageDataKey;

Availability: MacOS-X 10.0.0

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain error page data.

NSHTTPPropertyRedirectionHeadersKey

NSString* const NSHTTPPropertyRedirectionHeadersKey;

Availability: MacOS-X 10.0.0

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain redirection headers.

NSHTTPPropertyServerHTTPVersionKey

NSString* const NSHTTPPropertyServerHTTPVersionKey;

Availability: MacOS-X 10.0.0

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain HTTP version supported by server.

NSHTTPPropertyStatusCodeKey

NSString* const NSHTTPPropertyStatusCodeKey;

Availability: MacOS-X 10.0.0

Key for passing to NSURLHandle 's propertyForKey.. methods to obtain status code.

NSHTTPPropertyStatusReasonKey

NSString* const NSHTTPPropertyStatusReasonKey;

NSString* const NSURLProtectionSpaceSOCKSProxy;

Availability: MacOS-X 10.2.0, Base 1.13.0

A SOCKS proxy

NSURLSession constants

NSURLSessionTaskPriorityDefault

const float NSURLSessionTaskPriorityDefault;

Availability: MacOS-X 10.9.0

Description forthcoming.

NSURLSessionTaskPriorityHigh

const float NSURLSessionTaskPriorityHigh;

Availability: MacOS-X 10.9.0

Description forthcoming.

NSURLSessionTaskPriorityLow

const float NSURLSessionTaskPriorityLow;

Availability: MacOS-X 10.9.0

Description forthcoming.

NSURLSessionTransferSizeUnknown

const int64_t NSURLSessionTransferSizeUnknown;

NSUserNotificationDefaultSoundName

NSString* const NSUserNotificationDefaultSoundName;

Availability: MacOS-X 10.8.0

Description forthcoming.

NSValueTransformer constants

NSIsNilTransformerName

NSString* const NSIsNilTransformerName;

Availability: MacOS-X 10.3.0, Base 1.2.0

This transformer converts a nil value to a YES.
Not reversible.

NSIsNotNilTransformerName

NSString* const NSIsNotNilTransformerName;

Availability: MacOS-X 10.3.0, Base 1.2.0

This transformer converts a non-nil value to a YES.
Not reversible.

NSNegateBooleanTransformerName

NSString* const NSNegateBooleanTransformerName;

Availability: MacOS-X 10.3.0, Base 1.2.0

This transformer converts a YES to a NO and a NO to a YES.

NSUnarchiveFromDataTransformerName

NSString* const NSUnarchiveFromDataTransformerName;

Availability: MacOS-X 10.3.0, Base 1.2.0

This transformer converts an NSData instance to the object archived in it, or archives an object inot an NSData .

NSXMLParser constants

NSXMLParserErrorDomain

NSString* const NSXMLParserErrorDomain;

Availability: MacOS-X 10.3.0

Domain for errors

NSArray types

NSBinarySearchingOptions

typedef NSUInteger NSBinarySearchingOptions;

Availability: MacOS-X 10.6.0

Description forthcoming.

NSAttributedString types

NSAttributedStringKey

typedef NSString* NSAttributedStringKey;

Availability: MacOS-X 10.0.0

Description forthcoming.

NSAutoreleasePool types

struct autorelease_array_list

typedef struct autorelease_array_list struct autorelease_array_list;

Availability: OpenStep

Each pool holds its objects-to-be-released in a linked-list of these structures.

{
  struct autorelease_array_list *next;
  unsigned size;
  unsigned count;
  id objects[0];
}

struct autorelease_thread_vars

typedef struct autorelease_thread_vars struct autorelease_thread_vars;

Availability: OpenStep

Each thread has its own copy of these variables.

{
  NSAutoreleasePool *current_pool; // current pool for thread
  unsigned total_objects_count;    // total #/autoreleased objects over thread's lifetime
  id *pool_cache;                  // cache of previously-allocated pools,
  int pool_cache_size;             //  used internally for recycling
  int pool_cache_count;
}

NSBackgroundActivityScheduler types

NSBackgroundActivityResult

typedef NSInteger NSBackgroundActivityResult;

Availability: MacOS-X 10.10.0

Description forthcoming.

NSQualityOfService

typedef NSInteger NSQualityOfService;

NSByteOrder

typedef enum ... NSByteOrder;

Availability: OpenStep

Description forthcoming.

NSSwappedDouble

typedef uint64_t NSSwappedDouble;

Availability: OpenStep

Description forthcoming.

NSSwappedFloat

typedef uint32_t NSSwappedFloat;

NSComparisonPredicateModifier

typedef enum _NSComparisonPredicateModifier NSComparisonPredicateModifier;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSComparisonPredicateOptions

typedef enum _NSComparisonPredicateOptions NSComparisonPredicateOptions;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSPredicateOperatorType

typedef enum _NSPredicateOperatorType NSPredicateOperatorType;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSCompoundPredicate types

NSCompoundPredicateType

typedef NSUInteger NSCompoundPredicateType;

NSDateComponentsFormatterUnitsStyle

typedef NSInteger NSDateComponentsFormatterUnitsStyle;

Availability: Not in OpenStep/MacOS-X

Description forthcoming.

NSDateComponentsFormatterZeroFormattingBehavior

typedef NSUInteger NSDateComponentsFormatterZeroFormattingBehavior;

NSTimeInterval

typedef double NSTimeInterval;

Availability: OpenStep

Time interval difference between two dates, in seconds.

NSDateIntervalFormatter types

NSDateIntervalFormatterStyle

typedef NSUInteger NSDateIntervalFormatterStyle;

Availability: MacOS-X 10.10.0

Description forthcoming.

NSDebug types

GSDebugAllocationTraceFunction

typedef NSObject*(* GSDebugAllocationTraceFunction;

NSDirectoryEnumerationOptions

typedef NSUInteger NSDirectoryEnumerationOptions;

Availability: MacOS-X 10.0.0

Description forthcoming.

OSType

typedef uint32_t OSType;

GSFileWrapperType

typedef enum ... GSFileWrapperType;

Availability: OpenStep

Description forthcoming.

NSFileWrapperReadingOptions

typedef NSUInteger NSFileWrapperReadingOptions;

Availability: MacOS-X 10.6.0

Description forthcoming.

NSFileWrapperWritingOptions

typedef NSUInteger NSFileWrapperWritingOptions;

NSAlignmentOptions

typedef NS_ENUM(unsigned long long) NSAlignmentOptions;

Availability: MacOS-X 10.7.0

Sides of a rectangle.

{
  NSMinXEdge,
  NSMinYEdge,
  NSMaxXEdge,
  NSMaxYEdge
}

NSRectEdge

A value representing the alignment process

{
  NSAlignMinXInward,
  NSAlignMinYInward,
  NSAlignMaxXInward,
  NSAlignMaxYInward,
  NSAlignWidthInward,
  NSAlignHeightInward,   
  NSAlignMinXOutward,
  NSAlignMinYOutward,
  NSAlignMaxXOutward,
  NSAlignMaxYOutward,
  NSAlignWidthOutward,
  NSAlignHeightOutward,
  NSAlignMinXNearest,
  NSAlignMinYNearest,
  NSAlignMaxXNearest,
  NSAlignMaxYNearest,
  NSAlignWidthNearest,
  NSAlignHeightNearest,
  NSAlignRectFlipped,
  NSAlignAllEdgesInward,
  NSAlignAllEdgesOutward,
  NSAlignAllEdgesNearest
}

NSAlignmentOptions

NSAlignMinXInward
NSAlignMinYInward
NSAlignMaxXInward
NSAlignMaxYInward
NSAlignWidthInward
NSAlignHeightInward
NSAlignMinXOutward
NSAlignMinYOutward
NSAlignMaxXOutward
NSAlignMaxYOutward
NSAlignWidthOutward
NSAlignHeightOutward
NSAlignMinXNearest
NSAlignMinYNearest
NSAlignMaxXNearest
NSAlignMaxYNearest
NSAlignWidthNearest
NSAlignHeightNearest
NSAlignRectFlipped
NSAlignAllEdgesInward
NSAlignAllEdgesOutward
NSAlignAllEdgesNearest

NSPoint

typedef struct CGPoint NSPoint;

Availability: OpenStep

{
  CGFloat x;
  CGFloat y;
}

Represents a 2-d cartesian position.

NSPointArray

typedef NSPoint* NSPointArray;

Availability: MacOS-X 10.0.0

Array of NSPoint structs.

NSPointPointer

typedef NSPoint* NSPointPointer;

Availability: MacOS-X 10.0.0

Pointer to NSPoint struct.

NSRect

typedef struct CGRect NSRect;

Availability: OpenStep

{
  NSPoint origin;
  NSSize size;
}

Rectangle.

NSRectArray

typedef NSRect* NSRectArray;

Availability: MacOS-X 10.0.0

Array of NSRect structs.

NSRectEdge

typedef NS_ENUM(NSUInteger) NSRectEdge;

Availability: OpenStep

Description forthcoming.

NSRectPointer

typedef NSRect* NSRectPointer;

Availability: MacOS-X 10.0.0

Pointer to NSRect struct.

NSSize

typedef struct CGSize NSSize;

Availability: OpenStep

{
  CGFloat width;
  CGFloat height;
}

Floating point rectangle size.

NSSizeArray

typedef NSSize* NSSizeArray;

Availability: MacOS-X 10.0.0

Array of NSSize structs.

NSSizePointer

typedef NSSize* NSSizePointer;

Availability: MacOS-X 10.0.0

Pointer to NSSize struct.

struct NSEdgeInsets

typedef struct NSEdgeInsets struct NSEdgeInsets;

Availability: MacOS-X 10.7.0

{
  CGFloat top;
  CGFloat left;
  CGFloat bottom;
  CGFloat right;
}

A description of the distance between the edges of two rectangles.

NSHashTable types

NSHashTableOptions

typedef NSUInteger NSHashTableOptions;

Availability: OpenStep

Description forthcoming.

struct _NSHashTableCallBacks

typedef struct _NSHashTableCallBacks struct _NSHashTableCallBacks;

Availability: OpenStep

Callback functions for an NSHashTable. See NSCreateHashTable() .


            NSUInteger (*hash)(NSHashTable *, const
            void *)

... Hashing function. NOTE: Elements with equal values must have equal hash function values. The default if NULL uses the pointer addresses directly.


            BOOL (*isEqual)(NSHashTable *, const
            void *, const
            void *)

... Comparison function. The default if NULL uses ' == '.


            void (*retain)(NSHashTable *,
            const void *)

... Retaining function called when adding elements to the table. The default if NULL is a no-op (no reference counting).


            void (*release)(NSHashTable *,
            void *)

... Releasing function called when a data element is removed from the table. The default if NULL is a no-op (no reference counting).


            NSString *(*describe)(NSHashTable *, const
            void *)

... Description function. The default if NULL prints boilerplate.

NSHTTPCookieStorage types

NSHTTPCookieAcceptPolicy

typedef NSUInteger NSHTTPCookieAcceptPolicy;

Availability: MacOS-X 10.2.0, Base 1.13.0

NSHTTPCookieAcceptPolicyAlways Accept all cookies NSHTTPCookieAcceptPolicyNever Reject all cookies NSHTTPCookieAcceptPolicyOnlyFromMainDocumentDomain Accept cookies only from the main document domain

NSInvocation types

_NSObjCValueType

typedef NS_ENUM(char) _NSObjCValueType;

Availability: OpenStep

Creates and returns an autoreleased invocation containing a message to an instance of the class. The 'message' consists of selector and arguments like a standard ObjectiveC method call.
Before using the returned invocation, you need to set its target.
Creates and returns an autoreleased invocation containing a message to the target object. The 'message' consists of selector and arguments like a standard ObjectiveC method call.

NSObjCArrayType
NSObjCBitfield
NSObjCBoolType
NSObjCCharType
NSObjCDoubleType
NSObjCFloatType
NSObjCLonglongType
NSObjCLongType
NSObjCNoType
NSObjCObjectType
NSObjCPointerType
NSObjCSelectorType
NSObjCShortType
NSObjCStringType
NSObjCStructType
NSObjCUnionType
NSObjCVoidType

NSISO8601DateFormatter types

NSISO8601DateFormatOptions

typedef NSUInteger NSISO8601DateFormatOptions;

NSJSONReadingOptions

typedef NSUInteger NSJSONReadingOptions;

Availability: OpenStep

A bitmask containing flags from the NSJSONReading* set, specifying options to use when reading JSON.

NSJSONWritingOptions

typedef NSUInteger NSJSONWritingOptions;

Availability: OpenStep

A bitmask containing flags from the NSJSONWriting* set, specifying options to use when writing JSON.

NSKeyValueObserving types

NSKeyValueChange

typedef NSUInteger NSKeyValueChange;

Availability: MacOS-X 10.3.0, Base 1.2.0

Description forthcoming.

NSKeyValueChangeKey

typedef NSString* NSKeyValueChangeKey;

Availability: MacOS-X 10.12.0, Base 1.2.0

Description forthcoming.

NSKeyValueObservingOptions

typedef NSUInteger NSKeyValueObservingOptions;

Availability: MacOS-X 10.3.0, Base 1.2.0

Description forthcoming.

NSKeyValueSetMutationKind

typedef NSUInteger NSKeyValueSetMutationKind;

Availability: MacOS-X 10.3.0, Base 1.2.0

Description forthcoming.

NSLengthFormatter types

NSLengthFormatterUnit

typedef NSInteger NSLengthFormatterUnit;

NSLocaleLanguageDirection

typedef NSUInteger NSLocaleLanguageDirection;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSMapTable types

NSMapTableOptions

typedef NSUInteger NSMapTableOptions;

Availability: OpenStep

Description forthcoming.

NSMapTableValueCallBacks

typedef struct _NSMapTableValueCallBacks NSMapTableValueCallBacks;

Availability: OpenStep

Callback functions for a value.

struct _NSMapTableKeyCallBacks

typedef struct _NSMapTableKeyCallBacks struct _NSMapTableKeyCallBacks;

Availability: OpenStep

Callback functions for a key.
Comparison function. Must not modify either key.
Retaining function called when adding elements to table.
Notionally this must not modify the key (the key may not actually have a retain count, or the retain count may be stored externally to the key, but in practice this often actually changes a counter within the key).
Releasing function called when a data element is removed from the table. This may decrease a retain count or may actually destroy the key.
Description function. Generates a string describing the key and does not modify the key itself.
Quantity that is not a key to the map table.

NSMassFormatter types

NSMassFormatterUnit

typedef NSInteger NSMassFormatterUnit;

Availability: MacOS-X 10.10.0

Description forthcoming.

NSMeasurementFormatter types

NSMeasurementFormatterUnitOptions

typedef NSUInteger NSMeasurementFormatterUnitOptions;

Availability: MacOS-X 10.12.0

Description forthcoming.

NSNetServices types

NSNetServiceOptions

typedef NSUInteger NSNetServiceOptions;

Availability: OpenStep

Description forthcoming.

NSNetServicesError

typedef NSUInteger NSNetServicesError;

Availability: OpenStep

NSNetServicesUnknownError
An unknown error occurred.
NSNetServicesCollisionError
The given registration has had a name collision. Registration should be cancelled and tried again with a different name.
NSNetServicesNotFoundError
The service could not be found.
NSNetServicesActivityInProgress
A request is already in progress.
NSNetServicesBadArgumentError
An invalid argument was used to create the object.
NSNetServicesCancelledError
The request has been cancelled.
NSNetServicesInvalidError
The service was improperly configured.
NSNetServicesTimeoutError
The request has timed out before a successful resolution.

NSNotification types

NSNotificationName

typedef NSString* NSNotificationName;

NSNumberFormatterBehavior

typedef NSUInteger NSNumberFormatterBehavior;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSNumberFormatterPadPosition

typedef NSUInteger NSNumberFormatterPadPosition;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSNumberFormatterRoundingMode

typedef NSUInteger NSNumberFormatterRoundingMode;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSNumberFormatterStyle

typedef NSUInteger NSNumberFormatterStyle;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSObjCRuntime types

NSComparisonResult

typedef NS_ENUM(NSInteger) NSComparisonResult;

Availability: OpenStep

Contains values NSOrderedSame, NSOrderedAscending NSOrderedDescending, for left hand side equals, less than, or greater than right hand side.

NSOrderedAscending
NSOrderedSame
NSOrderedDescending

NSEnumerationOptions

typedef NS_OPTIONS(NSUInteger) NSEnumerationOptions;

Availability: OpenStep

Backwards compatibility macro for the objc_designated_initializer attribute
Bitfield used to specify options to control enumeration over collections.

NSEnumerationConcurrent
NSEnumerationReverse: Specifies that the enumeration is concurrency-safe. Note that this does not mean that it will be carried out in a concurrent manner, only that it can be.

NSExceptionName

typedef NSString* NSExceptionName;

Availability: OpenStep

Declare the foundation export macro as an alias to GS_EXPORT
Declare NSExceptionName

NSInteger

typedef intptr_t NSInteger;

Availability: OpenStep

Description forthcoming.

NSSortOptions

typedef NS_OPTIONS(NSUInteger) NSSortOptions;

Availability: OpenStep

Bitfield used to specify options to control the sorting of collections.

NSSortConcurrent
NSSortStable: Specifies that the sort is concurrency-safe. Note that this does not mean that it will be carried out in a concurrent manner, only that it can be.

NSUInteger

typedef uintptr_t NSUInteger;

Availability: OpenStep

Description forthcoming.

NSOperation types

NSOperationQueuePriority

typedef NSInteger NSOperationQueuePriority;

Availability: MacOS-X 10.5.0

Description forthcoming.

NSPathUtilities types

NSSearchPathDirectory

typedef NSUInteger NSSearchPathDirectory;

Availability: MacOS-X 10.0.0

Enumeration of possible requested directory type specifiers for NSSearchPathForDirectoriesInDomains() function. On a traditional GNUstep filesystem layout these correspond to the subdirectories that may be found in the various domains, such as "Library" and "Applications". In a different filesystem layout these directories might be located anywhere on disk.

{
  NSApplicationDirectory,
  NSDemoApplicationDirectory,
  NSDeveloperApplicationDirectory,
  NSAdminApplicationDirectory,
  NSLibraryDirectory,
  NSDeveloperDirectory,
  NSUserDirectory,
  NSDocumentationDirectory,
  NSDocumentDirectory,
  NSCoreServiceDirectory,
  NSDesktopDirectory,
  NSCachesDirectory,
  NSApplicationSupportDirectory
  NSAllApplicationsDirectory,
  NSAllLibrariesDirectory,
  NSItemReplacementDirectory,
  GSLibrariesDirectory,
  GSToolsDirectory,
  GSAdminToolsDirectory,
  GSFontsDirectory,
  GSFrameworksDirectory,
  GSWebApplicationsDirectory
}

NSSearchPathDomainMask

typedef NSUInteger NSSearchPathDomainMask;

Availability: MacOS-X 10.0.0

Mask type for NSSearchPathForDirectoriesInDomains() function. A bitwise OR of one or more of NSUserDomainMask, NSLocalDomainMask, NSNetworkDomainMask, NSSystemDomainMask, NSAllDomainsMask.

NSPersonNameComponentsFormatter types

NSPersonNameComponentsFormatterOptions

typedef NSUInteger NSPersonNameComponentsFormatterOptions;

Availability: MacOS-X 10.11.0

Description forthcoming.

NSPersonNameComponentsFormatterStyle

typedef NSUInteger NSPersonNameComponentsFormatterStyle;

Availability: MacOS-X 10.11.0

Description forthcoming.

NSPointerFunctions types

NSPointerFunctionsOptions

typedef NSUInteger NSPointerFunctionsOptions;

Availability: MacOS-X 10.5.0

An integer value containing memory option, personality option, and copying option.

NSPort types

NSSocketNativeHandle

typedef SOCKET NSSocketNativeHandle;

Availability: MacOS-X 10.0.0

Native socket type.

NSProcessInfo types

NSActivityOptions

typedef uint64_t NSActivityOptions;

NSPropertyListFormat

typedef NSUInteger NSPropertyListFormat;

Availability: MacOS-X 10.0.0

Specifies the serialisation format for a serialised property list.

NSPropertyListOpenStepFormat the most human-readable format
NSPropertyListXMLFormat_v1_0 portable and readable
NSPropertyListBinaryFormat_v1_0 the standard format on macos-x
NSPropertyListGNUstepFormat extension of OpenStep format
NSPropertyListGNUstepBinaryFormat efficient, hardware independent

NSPropertyListMutabilityOptions

typedef NSUInteger NSPropertyListMutabilityOptions;

Availability: MacOS-X 10.0.0

Describes the mutability to use when generating objects during deserialisation of a property list.

NSPropertyListImmutable all objects in created list are immutable
NSPropertyListMutableContainers dictionaries, arrays, strings and data objects are mutable

NSPropertyListReadOptions

typedef NSUInteger NSPropertyListReadOptions;

Availability: MacOS-X 10.6.0

Description forthcoming.

NSPropertyListWriteOptions

typedef NSUInteger NSPropertyListWriteOptions;

Availability: MacOS-X 10.6.0

Description forthcoming.

NSRange types

NSRange

typedef struct _NSRange NSRange;

Availability: OpenStep

{
  NSUInteger location;
  NSUInteger length;
}

The NSRange type is used to specify ranges of locations, typically items in an array, characters in a string, and bytes in a data object.

As 'boundary' or 'fencepost' errors are a particularly common problem in programming, it is important that you understand how an NSRange works.

An NSRange consists of a location and a length. The points that are considered to lie in a range are the integers from the location to the location plus the length, so the number of points in a range is the length of the range plus one.
However, if you consider these points like the marks on a ruler, you can only store information between points. So the number of items that can be stored in a range is the length of the range.

NSRangePointer

typedef NSRange* NSRangePointer;

Availability: MacOS-X 10.0.0

Pointer to an NSRange structure.

NSRegularExpression types

GSRegexEnumerationCallback

typedef void(* GSRegexEnumerationCallback;

Availability: MacOS-X 10.0.0, Base 1.31.0

Enumeration with a C function callback uses this prototype

NSMatchingFlags

typedef NSUInteger NSMatchingFlags;

Availability: MacOS-X 10.0.0

Description forthcoming.

NSMatchingOptions

typedef NSUInteger NSMatchingOptions;

Availability: MacOS-X 10.0.0

Description forthcoming.

NSRegularExpressionOptions

typedef NSUInteger NSRegularExpressionOptions;

Availability: MacOS-X 10.0.0

Description forthcoming.

NSRunLoop types

NSRunLoopMode

typedef NSString* NSRunLoopMode;

Availability: OpenStep

Description forthcoming.

RunLoopEventType

typedef enum ... RunLoopEventType;

Availability: OpenStep

This type specifies the kinds of event which may be 'watched' in a run loop.

ET_RPORT
ET_WINMSG
ET_TRIGGER
ET_WDESC
ET_RPORT
ET_EDESC
ET_TRIGGER

NSStream types

NSStreamEvent

typedef NSUInteger NSStreamEvent;

Availability: MacOS-X 10.4.0, Base 1.2.0

Description forthcoming.

NSStreamStatus

typedef NSUInteger NSStreamStatus;

Availability: MacOS-X 10.4.0, Base 1.2.0

Description forthcoming.

NSString types

NSStringCompareOptions

typedef NSUInteger NSStringCompareOptions;

Availability: OpenStep

Description forthcoming.

NSStringEncoding

typedef enum _NSStringEncoding NSStringEncoding;

Availability: OpenStep

Enumeration of available encodings for converting between bytes and characters (in NSString s). The ones that are shared with OpenStep and Cocoa are: NSASCIIStringEncoding, NSNEXTSTEPStringEncoding, NSJapaneseEUCStringEncoding, NSUTF8StringEncoding, NSISOLatin1StringEncoding, NSSymbolStringEncoding, NSNonLossyASCIIStringEncoding, NSShiftJISStringEncoding, NSISOLatin2StringEncoding, NSUnicodeStringEncoding, NSWindowsCP1251StringEncoding, NSWindowsCP1252StringEncoding, NSWindowsCP1253StringEncoding, NSWindowsCP1254StringEncoding, NSWindowsCP1250StringEncoding, NSISO2022JPStringEncoding, NSMacOSRomanStringEncoding, NSProprietaryStringEncoding .

Additional encodings available under GNUstep are: NSKOI8RStringEncoding, NSISOLatin3StringEncoding, NSISOLatin4StringEncoding, NSISOCyrillicStringEncoding, NSISOArabicStringEncoding, NSISOGreekStringEncoding, NSISOHebrewStringEncoding, NSISOLatin5StringEncoding, NSISOLatin6StringEncoding, NSISOThaiStringEncoding, NSISOLatin7StringEncoding, NSISOLatin8StringEncoding, NSISOLatin9StringEncoding, NSChineseEUCStringEncoding, NSUTF7StringEncoding, NSGSM0338StringEncoding, NSBig5StringEncoding, NSKoreanEUCStringEncoding, NSDOSLatinUSStringEncoding, NSDOSGreekStringEncoding, NSDOSBalticRimStringEncoding, NSDOSLatin1StringEncoding, NSDOSGreek1StringEncoding, NSDOSLatin2StringEncoding, NSDOSCyrillicStringEncoding, NSDOSTurkishStringEncoding, NSDOICortugueseStringEncoding, NSDOSIcelandicStringEncoding, NSDOSHebrewStringEncoding, NSDOSCanadianFrenchStringEncoding, NSDOSArabicStringEncoding, NSDOSNordicStringEncoding, NSDOSRussianStringEncoding, NSDOSGreek2StringEncoding, NSDOSThaiStringEncoding, NSDOSJapaneseStringEncoding, NSDOSChineseSimplifStringEncoding, NSDOSKoreanStringEncoding, NSDOSChineseTradStringEncoding, NSWindowsHebrewStringEncoding, NSWindowsArabicStringEncoding, NSWindowsBalticRimStringEncoding, NSWindowsVietnameseStringEncoding NSWindowsKoreanJohabStringEncoding .

GSUndefinedEncoding
NSASCIIStringEncoding
NSNEXTSTEPStringEncoding
NSJapaneseEUCStringEncoding
NSUTF8StringEncoding
NSISOLatin1StringEncoding
NSSymbolStringEncoding
NSNonLossyASCIIStringEncoding
NSShiftJISStringEncoding
NSISOLatin2StringEncoding
NSUnicodeStringEncoding
NSWindowsCP1251StringEncoding
NSWindowsCP1252StringEncoding
NSWindowsCP1253StringEncoding
NSWindowsCP1254StringEncoding
NSWindowsCP1250StringEncoding
NSISO2022JPStringEncoding
NSMacOSRomanStringEncoding
NSUTF16StringEncoding
NSUTF16BigEndianStringEncoding
NSUTF16LittleEndianStringEncoding
NSUTF32StringEncoding
NSUTF32BigEndianStringEncoding
NSUTF32LittleEndianStringEncoding
NSProprietaryStringEncoding
NSGSM0338StringEncoding
NSMacOSJapaneseStringEncoding
NSMacOSTraditionalChineseStringEncoding
NSMacOSKoreanStringEncoding
NSMacOSArabicStringEncoding
NSMacOSHebrewStringEncoding
NSMacOSGreekStringEncoding
NSMacOSCyrillicStringEncoding
NSMacOSDevanagariStringEncoding
NSMacOSGurmukhiStringEncoding
NSMacOSGujaratiStringEncoding
NSMacOSOriyaStringEncoding
NSMacOSBengaliStringEncoding
NSMacOSTamilStringEncoding
NSMacOSTeluguStringEncoding
NSMacOSKannadaStringEncoding
NSMacOSMalayalamStringEncoding
NSMacOSSinhaleseStringEncoding
NSMacOSBurmeseStringEncoding
NSMacOSKhmerStringEncoding
NSMacOSThaiStringEncoding
NSMacOSLaotianStringEncoding
NSMacOSGeorgianStringEncoding
NSMacOSArmenianStringEncoding
NSMacOSSimplifiedChineseStringEncoding
NSMacOSTibetanStringEncoding
NSMacOSMongolianStringEncoding
NSMacOSEthiopicStringEncoding
NSMacOSCentralEuropeanRomanStringEncoding
NSMacOSVietnameseStringEncoding
NSMacOSExtendedArabicStringEncoding
NSMacOSSymbolStringEncoding
NSMacOSDingbatsStringEncoding
NSMacOSTurkishStringEncoding
NSMacOSCroatianStringEncoding
NSMacOSIcelandicStringEncoding
NSMacOSRomanianStringEncoding
NSMacOSCelticStringEncoding
NSMacOSGaelicStringEncoding
NSMacOSKeyboardSymbolsStringEncoding
NSMacOSFarsiStringEncoding
NSMacOSUkrainianStringEncoding
NSMacOSInuitStringEncoding
NSMacVT100StringEncoding
NSMacHFSStringEncoding
GS_API_LATEST
NSUTF7IMAPStringEncoding
NSISOLatin3StringEncoding
NSISOLatin4StringEncoding
NSISOCyrillicStringEncoding
NSISOArabicStringEncoding
NSISOGreekStringEncoding
NSISOHebrewStringEncoding
NSISOLatin5StringEncoding
NSISOLatin6StringEncoding
NSISOThaiStringEncoding
NSISOLatin7StringEncoding
NSISOLatin8StringEncoding
NSISOLatin9StringEncoding
GS_API_LATEST
NSISOLatinBalticRimStringEncoding
NSISOLatinCelticStringEncoding
NSISOLatinCyrillicStringEncoding
NSISOLatinGreekStringEncoding
NSISOLatinHebrewStringEncoding
NSISOLatinNordicStringEncoding
NSISOLatinThaiStringEncoding
NSISOLatinTurkishStringEncoding
NSDOSLatinUSStringEncoding
NSDOSGreekStringEncoding
NSDOSBalticRimStringEncoding
NSDOSLatin1StringEncoding
NSDOSGreek1StringEncoding
NSDOSLatin2StringEncoding
NSDOSCyrillicStringEncoding
NSDOSTurkishStringEncoding
NSDOICortugueseStringEncoding
NSDOSIcelandicStringEncoding
NSDOSHebrewStringEncoding
NSDOSCanadianFrenchStringEncoding
NSDOSArabicStringEncoding
NSDOSNordicStringEncoding
NSDOSRussianStringEncoding
NSDOSGreek2StringEncoding
NSDOSThaiStringEncoding
NSDOSJapaneseStringEncoding
NSDOSChineseSimplifStringEncoding
NSDOSKoreanStringEncoding
NSDOSChineseTradStringEncoding
NSWindowsLatin1StringEncoding
NSWindowsLatin2StringEncoding
NSWindowsCyrillicStringEncoding
NSWindowsGreekStringEncoding
NSWindowsLatin5StringEncoding
NSWindowsHebrewStringEncoding
NSWindowsArabicStringEncoding
NSWindowsBalticRimStringEncoding
NSWindowsVietnameseStringEncoding
NSWindowsKoreanJohabStringEncoding
NSJIS_X0201_76StringEncoding
NSJIS_X0208_83StringEncoding
NSJIS_X0208_90StringEncoding
NSJIS_X0212_90StringEncoding
NSJIS_C6226_78StringEncoding
GS_API_LATEST
GS_API_LATEST
NSShiftJIS_X0213_00StringEncoding
NSGBK_95StringEncoding
NSGB_18030_2000StringEncoding
NSKSC_5601_87StringEncoding
NSKSC_5601_92_JohabStringEncoding
NSCNS_11643_92_P1StringEncoding
NSCNS_11643_92_P2StringEncoding
NSCNS_11643_92_P3StringEncoding
NSISO2022JapaneseStringEncoding
NSISO2022Japanese2StringEncoding
NSISO2022Japanese1StringEncoding
NSISO2022Japanese3StringEncoding
NSISO2022ChineseStringEncoding
NSISO2022ExtendedChineseStringEncoding
NSISO2022KoreanStringEncoding
NSEUCJapaneseStringEncoding
NSEUCChineseStringEncoding
NSEUCTaiwanChineseStringEncoding
NSEUCKoreanStringEncoding
NSKoreanEUCStringEncoding
NSChineseEUCStringEncoding
NSTaiwanChineseEUCStringEncoding
NSKOI8RStringEncoding
NSBig5StringEncoding
NSMacRomanLatin1StringEncoding
NSHZ_GB_2312StringEncoding
NSBig5_HKSCS_1999StringEncoding
GS_API_LATEST
NSKOI8UStringEncoding
NSBig5EStringEncoding
GS_API_LATEST
NSEBCDICUSStringEncoding
NSEBCDICCP037StringEncoding

NSStringEncodingConversionOptions

typedef NSUInteger NSStringEncodingConversionOptions;

Availability: MacOS-X 10.4.0

Description forthcoming.

NSStringEnumerationOptions

typedef NSUInteger NSStringEnumerationOptions;

Availability: MacOS-X 10.6.0

Description forthcoming.

unichar

typedef uint16_t unichar;

Availability: OpenStep

Type for representing unicode characters. (16-bit)

NSTask types

NSTaskTerminationReason

typedef NSInteger NSTaskTerminationReason;

NSTimeZoneNameStyle

typedef NSInteger NSTimeZoneNameStyle;

Availability: MacOS-X 10.5.0

Description forthcoming.

NSURLCache types

NSURLCacheStoragePolicy

typedef enum ... NSURLCacheStoragePolicy;

Availability: MacOS-X 10.2.0, Base 1.13.0

Specifies the cache storage policy.

NSURLCacheStorageAllowed
NSURLCacheStorageAllowedInMemoryOnly: Unrestricted caching
NSURLCacheStorageNotAllowed: In memory caching only

NSURLCredential types

NSURLCredentialPersistence

typedef enum ... NSURLCredentialPersistence;

Availability: MacOS-X 10.2.0, Base 1.13.0

Controls how long a credential is retained.

NSURLCredentialPersistenceNone
NSURLCredentialPersistenceForSession: Don't save at all
NSURLCredentialPersistencePermanent: Save for current session
NSURLCredentialPersistenceSynchronizable: Save forever (on disk)

NSURL types

NSURLBookmarkResolutionOptions

typedef NSUInteger NSURLBookmarkResolutionOptions;

Availability: MacOS-X 10.6.0

URL Bookmark Resolution Options

NSURLHandle types

NSURLHandleStatus

typedef NSUInteger NSURLHandleStatus;

Availability: MacOS-X 10.0.0

Description forthcoming.

NSURLRequest types

NSURLRequestCachePolicy

typedef NSUInteger NSURLRequestCachePolicy;

Availability: MacOS-X 10.2.0, Base 1.13.0

NSURLRequestUseProtocolCachePolicy: Says that any protocol specific cache policy should be used... this is the default.
NSURLRequestReloadIgnoringCacheData: Says the data should be re-loaded from source rather than any cached data being used, irrespective of any protocol standard.
NSURLRequestReturnCacheDataElseLoad: Says to use cached data if any is available, but to load from source if the cache is empty. Ignores any protocol specific logic (like cache aging).
NSURLRequestReturnCacheDataDontLoad: Says to use cached data if any is available, but to return nil without loading if the cache is empty.

NSURLRequestNetworkServiceType

typedef NSUInteger NSURLRequestNetworkServiceType;

Availability: MacOS-X 10.7.0, Base 1.13.0

NSURLNetworkServiceTypeDefault: Specifies standard network traffic. Most connections should be made using this service type this is the default.
NSURLNetworkServiceTypeVoIP: Specifies that the request is for VoIP traffic.
NSURLNetworkServiceTypeVideo: Specifies that the request is for video traffic.
NSURLNetworkServiceTypeBackground: Specifies that the request is for background traffic.
NSURLNetworkServiceTypeVoice: Specifies that the request is for voice traffic.
NSURLNetworkServiceTypeCallSignaling: Call Signaling - enumeration cases.

NSURLSession types

NSURLSessionAuthChallengeDisposition

typedef NS_ENUM(NSInteger) NSURLSessionAuthChallengeDisposition;

Availability: MacOS-X 10.9.0

Description forthcoming.

NSURLSessionResponseDisposition

NSZone

typedef struct _NSZone NSZone;

Availability: OpenStep

Description forthcoming.

NSDebug variables

NSDeallocateZombies

BOOL NSDeallocateZombies;

Availability: OpenStep

Enable/disable object deallocation.

If zombies are enabled, objects are by default not deallocated, and memory leaks. The NSDeallocateZombies variable lets you say that the the memory used by zombies should be freed.

Doing this makes the behavior of zombies similar to that when zombies are not enabled... the memory occupied by the zombie may be re-used for other purposes, at which time the isa pointer may be overwritten and the zombie behavior will cease.

The default value of this boolean is NO, but this can be controlled by the NSDeallocateZombies environment variable.

NSDebugEnabled

BOOL NSDebugEnabled;

Availability: OpenStep

A global variable that you can use to enable debug behaviour in your program.

NSZombieEnabled

BOOL NSZombieEnabled;

Availability: OpenStep

Enable/disable zombies.

When an object is deallocated, its isa pointer is normally modified to the hexadecimal value 0xdeadface, so that any attempt to send a message to the deallocated object will cause a crash, and examination of the object within the debugger will show the 0xdeadface value... making it obvious why the program crashed.

Turning on zombies changes this behavior so that the isa pointer is modified to be that of the NSZombie class. When messages are sent to the object, instead of crashing, NSZombie will use NSLog() to produce an error message. By default the memory used by the object will not really be freed, so error messages will continue to be generated whenever a message is sent to the object, and the object instance variables will remain available for examination by the debugger.

The default value of this boolean is NO, but this can be controlled by the NSZombieEnabled environment variable.

NSError variables

NSCocoaErrorDomain

NSErrorDomainconst NSCocoaErrorDomain;

Availability: MacOS-X 10.4.0

Domain for Foundation and AppKit (base and gui) errors.

NSMACHErrorDomain

NSErrorDomainconst NSMACHErrorDomain;

Availability: MacOS-X 10.3.0

Domain for system errors (on MACH).

NSOSStatusErrorDomain

NSErrorDomainconst NSOSStatusErrorDomain;

Availability: MacOS-X 10.3.0

Domain for system errors.

NSPOSIXErrorDomain

NSErrorDomainconst NSPOSIXErrorDomain;

Availability: MacOS-X 10.3.0

Domain for system and system library errors.

NSFileManager variables

enum _NSDirectoryEnumerationOptions

enum _NSDirectoryEnumerationOptions enum _NSDirectoryEnumerationOptions;

_NSLock_error_handler

NSLock_error_handler* _NSLock_error_handler;

Availability: OpenStep

Code may replace this function pointer in order to intercept the normal logging of a deadlock.

NSMapTable variables

struct _NSMapTableValueCallBacks

struct _NSMapTableValueCallBacks struct _NSMapTableValueCallBacks;

Availability: OpenStep

Retaining function called when adding elements to table.
Notionally this must not modify the element (the element may not actually have a retain count, or the retain count may be stored externally to the element, but in practice this often actually changes a counter within the element).
Releasing function called when a data element is removed from the table. This may decrease a retain count or may actually destroy the element.
Description function. Generates a string describing the element and does not modify the element itself.

NSNotificationQueue variables

struct _NSNotificationQueueList

struct _NSNotificationQueueList struct _NSNotificationQueueList;

Availability: OpenStep

Structure used internally by NSNotificationQueue .

NSObjCRuntime variables

_NSLogDescriptor

int _NSLogDescriptor;

Availability: Not in OpenStep/MacOS-X

A variable holding the file descriptor to which NSLogv() messages are written by default. GNUstep initialises this to stderr.
You may change this, but for thread safety should use the lock provided by GSLogLock() to protect the change.

_NSLog_printf_handler

NSLog_printf_handler* _NSLog_printf_handler;

Availability: Not in OpenStep/MacOS-X

A pointer to a function used to actually write the log data.

GNUstep initialises this to a function implementing the standard behavior for logging, but you may change this in your program in order to implement any custom behavior you wish. You should use the lock returned by GSLogLock() to protect any change you make.

Calls from NSLogv() to the function pointed to by this variable are protected by a lock, and should therefore be thread safe.

This function should accept a single NSString argument and return void.

The default implementation in GNUstep performs as follows -

Converts the string to be logged to data in the default CString encoding or, if that is not possible, to UTF8 data.
If the system supports writing to syslog and the user default to say that logging should be done to syslog (GSLogSyslog) is set, writes the data to the syslog.
On an mswindows system, where syslog is not available, the GSLogSyslog user default controls whether or not data is written to the system event log,
Otherwise, writes the data to the file descriptor stored in the variable _NSLogDescriptor , which is set by default to stderr.
Your program may change this descriptor... but you should protect changes using the lock provided by GSLogLock() .
NB. If the write to the descriptor fails, and the system supports writing to syslog, then the log is written to syslog as if the appropriate user default had been set.

NSRange variables

struct _NSRange

struct _NSRange struct _NSRange;

_NSConstantStringClassReference

struct objc_class _NSConstantStringClassReference;

Availability: OpenStep

For internal use with NeXT runtime; needed, until Apple Radar 2870817 is fixed.

NSZone variables

struct NSZoneStats

struct NSZoneStats struct NSZoneStats;

Availability: Not in OpenStep/MacOS-X

NSZoneStats is the structure returned by the NSZoneStats() function that summarizes the current usage of a zone. It is similar to the structure mstats in the GNU C library. It has 5 fields of type size_t -

bytes_total: This is the total size of memory managed by the zone, in bytes.
chunks_used: This is the number of memory chunks in use in the zone.
bytes_used: This is the number of bytes in use.
chunks_free: This is the number of memory chunks that are not in use.
bytes_free: This is the number of bytes managed by the zone that are not in use.