RTL index

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z _

Name	Kind	Unit	What it is
`UC`	variable	`unicodedata`
`uc_flags`	variable	`BaseUnix`	Flags describing the context.
`uc_link`	variable	`BaseUnix`	Context that will be resumed when current context ends.
`uc_mcontext`	variable	`BaseUnix`	Machine specific context representation of the context.
`uc_sigmask`	variable	`BaseUnix`	Bitmask of masked signals in this context.
`uc_stack`	variable	`BaseUnix`	Stack used by this context.
`ucred`	record	`Sockets`	User process credentials.
`UCS2Char`	type	`System`	UCS2 Unicode character.
`UCS4_HALF_BASE`	constant	`unicodedata`	Offset for UCS4 character encoding.
`UCS4_HALF_MASK`	constant	`unicodedata`	Unused currently.
`UCS4Char`	type	`System`	UCS Unicode character (unsigned 32 bit word).
`UCS4String`	type	`System`	String of characters.
`UCS4StringToUnicodeString`	function	`System`	Convert a UCS-4 encoded string to a Unicode string.
`UCS4StringToWideString`	function	`System`
`UD_CONTENTS_CODE`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UD_CONTENTS_DATA`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UD_CONTENTS_STACK`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UD_LIMIT_IN_PAGES`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UD_LM`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UD_READ_EXEC_ONLY`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UD_SEG_32BIT`	constant	`Linux`	TLS segment descriptor : Undocumented.
`UD_SEG_NOT_PRESENT`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UD_USEABLE`	constant	`Linux`	TLS segment descriptor: Undocumented.
`UDP_CORK`	constant	`Sockets`	Get/Set UDP CORK algorithm on datagram sockets.
`UDP_ENCAP`	constant	`Sockets`	Get/Set UDP encapsulation flag for IPSec datagram sockets.
`UDP_ENCAP_ESPINUDP`	constant	`Sockets`	? Undocumented datagram option, IPSec related.
`UDP_ENCAP_ESPINUDP_NON_IKE`	constant	`Sockets`	? Undocumented datagram option, IPSec related.
`UDP_ENCAP_L2TPINUDP`	constant	`Sockets`	? Undocumented datagram option, IPSec related.
`ufImplicitUnit`	constant	`sysutils`	Unit was implicitly imported into package (did not appear in package contains list).
`ufMainUnit`	constant	`sysutils`	Unit is the main unit of the package.
`ufOrgWeakUnit`	constant	`sysutils`	Unit is the original weak packaged unit.
`ufPackageUnit`	constant	`sysutils`	Unit is a packaged unit (appeared in package contains list).
`ufWeakPackageUnit`	constant	`sysutils`	Weak (original or not) packaged unit.
`ufWeakUnit`	constant	`sysutils`	Unit is a weak packaged unit.
`UGC_ClosePunctuation`	constant	`unicodedata`	Unicode token category: Close punctuation.
`UGC_CombiningMark`	constant	`unicodedata`	Unicode token category: Uppercase letter.
`UGC_ConnectPunctuation`	constant	`unicodedata`	Unicode token category: Connect punctuation.
`UGC_Control`	constant	`unicodedata`	Unicode token category: control token.
`UGC_CurrencySymbol`	constant	`unicodedata`	Unicode token category: Currency symbol.
`UGC_DashPunctuation`	constant	`unicodedata`	Unicode token category: Dash punctuation.
`UGC_DecimalNumber`	constant	`unicodedata`	Unicode token category: Uppercase letter.
`UGC_EnclosingMark`	constant	`unicodedata`	Unicode token category: Uppercase letter.
`UGC_FinalPunctuation`	constant	`unicodedata`	Unicode token category: Final punctuation.
`UGC_Format`	constant	`unicodedata`	Unicode token category: Formatting token.
`UGC_InitialPunctuation`	constant	`unicodedata`	Unicode token category: Initial punctuation.
`UGC_LetterNumber`	constant	`unicodedata`	Unicode token category: Letter-number.
`UGC_LineSeparator`	constant	`unicodedata`	Unicode token category: Line separator.
`UGC_LowercaseLetter`	constant	`unicodedata`	Unicode general category: Lowercase letter.
`UGC_MathSymbol`	constant	`unicodedata`	Unicode token category: Math symbol.
`UGC_ModifierLetter`	constant	`unicodedata`	Unicode general category: modifier letter.
`UGC_ModifierSymbol`	constant	`unicodedata`	Unicode token category: modifier symbol.
`UGC_NonSpacingMark`	constant	`unicodedata`	Unicode general category: Non-spacing mark.
`UGC_OpenPunctuation`	constant	`unicodedata`	Unicode token category: Open punctuation.
`UGC_OtherLetter`	constant	`unicodedata`	Unicode general category: Other letter.
`UGC_OtherNumber`	constant	`unicodedata`	Unicode token category: Other number.
`UGC_OtherPunctuation`	constant	`unicodedata`	Unicode token category: Other punctuation.
`UGC_OtherSymbol`	constant	`unicodedata`	Unicode token category: Other symbol.
`UGC_ParagraphSeparator`	constant	`unicodedata`	Unicode token category: Paragraph separator.
`UGC_PrivateUse`	constant	`unicodedata`	Unicode token category: For private use.
`UGC_SpaceSeparator`	constant	`unicodedata`	Unicode token category: Space separator.
`UGC_Surrogate`	constant	`unicodedata`	Unicode token category: Surrogate token.
`UGC_TitlecaseLetter`	constant	`unicodedata`	Unicode general category: Titlecase letter.
`UGC_Unassigned`	constant	`unicodedata`	Unicode token category: As yet unassigned.
`UGC_UppercaseLetter`	constant	`unicodedata`	Unicode general category: Uppercase letter.
`uid`	variable	`ipc`	Owner user ID.
`uid`	variable	`Sockets`	User ID.
`uid_t`	type	`BaseUnix`	User ID type.
`uid_t`	type	`Unix`	User ID type.
`uid_t`	type	`unixtype`	User ID type.
`UInt16`	type	`System`	An unsigned 16-bits integer.
`UInt24`	type	`unicodedata`	Alias for TUInt24Rec.
`UInt32`	type	`System`	An unsigned 32-bits integer.
`UInt64`	type	`System`	Unsigned 64-bit integer.
`UInt8`	type	`System`	An unsigned 8-bits integer.
`UIntPtr`	type	`System`	An unsigned integer with the same size in bytes as pointer.
`UIntToStr`	function	`sysutils`	Unsigned integer to String.
`UMul64x64_128`	function	`System`
`UnaryOp`	procedure	`Variants`	Perform a unary mathematical operation.
`Unassigned`	function	`System`	Unassigned variant.
`Unassigned`	function	`Variants`	Return an unassigned variant.
`UnfixArray`	procedure	`System`
`UnfixString`	procedure	`System`
`UnhookSignal`	procedure	`sysutils`	UnHook a specified signal.
`unicode`	variable	`charset`	Unicode character.
`unicode`	variable	`charset`	Unicode character.
`Unicode`	property	`sysutils`	UTF16 encoding instance.
`Unicode2AnsiMoveProc`	variable	`System`	Callback used whenever a Unicode string must be converted to an ansistring.
`UnicodeAndCodePages`	topic	`sysutils`	Unicode and codepage awareness.
`UnicodeCategoryNames`	constant	`unicodedata`
`UnicodeChar`	variable	`keyboard`
`UnicodeChar`	type	`System`	Unicode string character.
`UnicodeCharLenToString`	function	`System`	Convert a memory buffer with Unicode characters to a unicodestring.
`UnicodeCharLenToStrVar`	procedure	`System`	Convert a memory buffer with Unicode characters to an ansistring.
`UnicodeCharToString`	function	`System`	Convert Unicode character to string.
`UnicodeCharToStrVar`	procedure	`System`	Convert a null-terminated memory buffer with Unicode characters to an ansistring.
`UnicodeCompareStr`	function	`sysutils`	Compare 2 Unicode strings.
`UnicodeCompareText`	function	`sysutils`	Compare 2 strings case insensitively.
`UnicodeDataString`	property	`Classes`	Datastring as unicode string.
`UnicodeDataVersion`	function	`Character`
`UnicodeDataVersion`	function	`Character`
`UnicodeFmtStr`	procedure	`sysutils`	Format a string with given arguments, procedural version.
`UnicodeFormat`	function	`sysutils`	Format Unicode string.
`UnicodeFormatBuf`	function	`sysutils`	Format a Unicode string with given arguments and store the result in a unicodebuffer.
`UnicodeFromLocaleChars`	function	`System`
`UnicodeIsHighSurrogate`	function	`unicodedata`	Check if a UTF16 character is the high character in a surrogate pair.
`UnicodeIsLowSurrogate`	function	`unicodedata`	Check if a UTF16 character is the low character in a surrogate pair.
`UnicodeIsSurrogatePair`	function	`unicodedata`	Check if a pair of UTF16 encoded characters is a valid surrogate pair.
`UnicodeLowerCase`	function	`sysutils`	Return lowercase version of a string.
`UnicodeSameStr`	function	`sysutils`	Check whether 2 strings are equal.
`UnicodeSameText`	function	`sysutils`	Check whether 2 strings are the same, ignoring case.
`UnicodeString`	type	`System`	A string consisting of widechars.
`UnicodeStringReplace`	function	`sysutils`	Replace one occurrence of a string with another.
`UnicodeStringToUCS4String`	function	`System`	Convert a Unicode string to a UCS-4 string.
`UnicodeSupport`	topic	`System`	Unicode and codepage support.
`UnicodeToLower`	function	`unicodedata`	Transform unicode string to lowercase.
`UnicodeToUpper`	function	`unicodedata`	Transform unicode string to uppercase.
`UnicodeToUtf8`	function	`System`	Convert a unicode (UTF16) string to a UTF8 string
`UnicodeUpperCase`	function	`sysutils`	Return uppercase version of a string.
`UnifiedIdeograph`	property	`unicodedata`
`Union`	procedure	`Objects`	Enlarges rectangle to encompass another rectangle.
`Union`	function	`Types`
`Union`	function	`Types`
`UnionRect`	function	`Types`	Return the union of 2 rectangles.
`UnionRectF`	function	`Types`
`UniqueString`	procedure	`System`	Make sure reference count of string is 1.
`UnitName`	function	`System`	Unit name.
`UnitName`	property	`TypInfo`	Name of unit in which class is implemente.
`UnitName`	property	`TypInfo`	Unit name.
`UnitName`	property	`TypInfo`	Name of unit in which interface is defined.
`UnitnameSeparator`	constant	`Classes`
`UniversalTimeToLocal`	function	`DateUtils`	Convert UTC time to local time.
`UniversalTimeToLocal`	function	`sysutils`
`UniversalToEpoch`	function	`Unix`
`UniversalToFileDate`	function	`sysutils`
`UnixCpMap`	constant	`unixcp`	Map with codepage names.
`UnixCpMapLimit`	constant	`unixcp`	Number of code pages in map UnixCpMap.
`UnixDateDelta`	constant	`sysutils`	Number of days between 1.1.1900 and 1.1.1970.
`UnixDateToDt`	procedure	`Dos`	Convert a Unix timestamp to a DateTime record.
`UnixEpoch`	constant	`sysutils`	Starting point of the unix calendar (1/1/1970).
`UnixGetModuleByAddrHook`	constant	`System`	(Unix only) callback for GetModuleByAddr.
`UnixTime`	property	`DateUtils`
`UnixTimeStampToMac`	function	`DateUtils`	Convert Unix Timestamp to a Mac Timestamp.
`UnixToDateTime`	function	`DateUtils`	Convert Unix epoch time to a TDateTime value.
`UnloadLibrary`	function	`dynlibs`	Unload a previously loaded library.
`UnloadLibrary`	variable	`System`	Unload a loaded library.
`UnloadLibrary`	function	`System`	Unload a previously loaded library.
`Unlock`	procedure	`Classes`	Unlock the list.
`Unlock`	procedure	`Classes`	UnLocks a locked list.
`unlock_code`	function	`go32`	Unlock code segment.
`unlock_data`	function	`go32`	Unlock data segment.
`unlock_linear_region`	function	`go32`	Unlock linear memory region.
`unlocked_pages`	variable	`go32`	Total number of unlocked pages.
`UnlockList`	procedure	`Classes`	Unlocks the list after it was locked.
`UnlockRegion`	function	`Classes`	Unlock a region of the stream.
`UnlockRegion`	function	`Types`	Unlocks a previously locked region of bytes in the stream.
`UnlockResource`	function	`System`	Unlock a previously locked resource.
`UnlockResourceFunc`	variable	`System`	Handler for UnLockResource.
`UnlockScreenUpdate`	procedure	`video`	Unlock screen update.
`UnPack`	procedure	`System`	Create unpacked array from packed array.
`UnpackTime`	procedure	`Dos`	Unpack packed file time to a DateTime value.
`UnpremultipliedAlpha`	function	`System.UITypes`
`UnRegisterChanges`	procedure	`Classes`	Unregisters a client from the list of clients.
`UnRegisterClass`	procedure	`Classes`	Unregisters a class from the streaming system.
`UnRegisterClasses`	procedure	`Classes`	Unregisters multiple classes from the streaming system.
`UnregisterCollation`	function	`unicodedata`	Remove a collation from the list of known collections.
`UnregisterCollations`	procedure	`unicodedata`	Unregister all collations.
`UnregisterFindGlobalComponentProc`	procedure	`Classes`	Remove a previously registered component searching handler.
`UnRegisterModuleClasses`	procedure	`Classes`	Unregisters classes registered by module.
`UnsafeAddrOf`	function	`System`
`UnsafeAttribute`	class	`System`
`UnsafeFixString`	function	`System`
`UnsafeFrom`	procedure	`Types`
`UnsafeInTo`	function	`Types`
`Unused`	variable	`System`	Total amount of free process memory.
`unused1`	variable	`ipc`
`unused2`	variable	`ipc`
`unused3`	variable	`ipc`
`unused4`	variable	`ipc`
`UnusedHandle`	constant	`System`	Value indicating an unused file handle (as reported by the OS).
`UnwindFrame`	variable	`System`
`UpCase`	function	`System`	Convert a string to all uppercase.
`Update`	procedure	`Classes`
`Update`	function	`Classes`	Triggers the OnUpdate event.
`Update`	function	`Classes`	Calls the action's Update method.
`Update`	procedure	`Classes`	Handler called when an item in the collection has changed.
`UpdateAction`	function	`Classes`	Updates the state of an action.
`UpdateControlComponent`	procedure	`Classes`
`UpdateCount`	property	`Classes`
`UpdateCount`	property	`Classes`
`Updated`	procedure	`Classes`	Ends the csUpdating state.
`UpdateRegistry`	procedure	`Classes`	For compatibility only.
`UpdateScreen`	variable	`video`	Force an update of the screen.
`UpdateScreen`	procedure	`video`	Update physical screen with internal screen image.
`UpdateScreenArea`	variable	`video`
`UpdateScreenArea`	procedure	`video`
`UpdateTarget`	procedure	`Classes`	Notify client controls when the action updates itself.
`Updating`	property	`Classes`
`Updating`	procedure	`Classes`	Sets the state to csUpdating.
`UpperAnsiStringProc`	variable	`System`	Callback used when an ansistring must be uppercased.
`UpperCase`	function	`sysutils`
`UpperCase`	function	`sysutils`
`UpperCase`	function	`sysutils`
`UpperCase`	function	`sysutils`
`UpperCase`	function	`sysutils`	Return an uppercase version of a string.
`UpperUnicodeStringProc`	variable	`System`	Callback used to convert a Unicode string to uppercase.
`UpperWideStringProc`	variable	`System`	Callback used when a Unicode/wide string must be uppercased.
`uptime`	variable	`Linux`	Number of seconds since boot.
`usage`	topic	`heaptrc`	HeapTrc Usage.
`used_ids`	variable	`ipc`
`UseDefaultQueue`	variable	`Mouse`	Should the default event queue mechanism be used.
`UseHeapTrace`	constant	`heaptrc`	If set to False, the heap trace will be disabled.
`UseLocale`	property	`Classes`	Determines what methods are used in strings comparison.
`user_cap_data`	record	`Linux`	Capability description record.
`user_cap_header`	record	`Linux`	Root user capabilities header.
`user_desc`	record	`Linux`	TLS segment descriptor.
`UserBitLn`	constant	`Graph`	Line style: User defined.
`UserCharSize`	constant	`Graph`	User character size.
`UserData`	variable	`System`	User data for use in custom file types.
`UserData`	variable	`System`	User data.
`UserFill`	constant	`Graph`	Fill style: User-defined fill.
`UserTime`	variable	`Classes`	User code execution time.
`UtcOffset`	property	`DateUtils`
`UTF7`	property	`sysutils`	UTF7 encoding instance.
`UTF8`	property	`sysutils`	UTF8 encoding instance.
`UTF8Char`	type	`System`	Single byte character.
`Utf8CodePointLen`	function	`System`	Length of an UTF-8 codepoint.
`UTF8CompareLocale`	variable	`System`	Unused, for Delphi compatibility only.
`UTF8Decode`	function	`System`	Convert an UTF-8 encoded ansistring to a unicodestring.
`UTF8Encode`	function	`System`	Convert a widestring or unicodestring to an UTF-8 encoded ansistring.
`UTF8String`	type	`System`	UTF-8 Unicode (Ansi) string.
`Utf8ToAnsi`	function	`System`	Convert a UTF-8 encoded Unicode string to an ansistring.
`UTF8ToString`	function	`System`	Convert UTF8 to Unicode String.
`Utf8ToUnicode`	function	`System`	Convert a buffer with UTF-8 characters to widestring characters.
`UTF8ToUnicodeString`	function	`System`
`UTimBuf`	record	`BaseUnix`	Record used in to set file access and modification times.
`utimensat`	function	`Linux`
`UtsName`	record	`BaseUnix`	Record used to return kernel information in function.
`UTSNAME_DOMAIN_LENGTH`	constant	`BaseUnix`	Max length of domain name.
`UTSNAME_LENGTH`	constant	`BaseUnix`	Max length of system name, release, version, machine.
`UTSNAME_NODENAME_LENGTH`	constant	`BaseUnix`	Max length of node name.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.