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
`O_APPEND`	constant	`BaseUnix`	file open mode: Append to file.
`O_CLOEXEC`	constant	`Linux`	Close on exec flag: close file handle on exec call.
`O_CREAT`	constant	`BaseUnix`	file open mode: Create if file does not yet exist.
`O_DIRECT`	constant	`BaseUnix`	file open mode: Minimize caching effects.
`O_DIRECTORY`	constant	`BaseUnix`	file open mode: File must be directory.
`O_EXCL`	constant	`BaseUnix`	file open mode: Open exclusively.
`O_LARGEFILE`	constant	`BaseUnix`	file open mode: Open for 64-bit I/O.
`O_NDELAY`	constant	`BaseUnix`	file open mode: Alias for .
`O_NOCTTY`	constant	`BaseUnix`	file open mode: No TTY control.
`O_NOFOLLOW`	constant	`BaseUnix`	file open mode: Fail if file is symbolic link.
`O_NONBLOCK`	constant	`BaseUnix`	file open mode: Open in non-blocking mode.
`O_RDONLY`	constant	`BaseUnix`	file open mode: Read only.
`O_RDWR`	constant	`BaseUnix`	file open mode: Read/Write.
`O_SYNC`	constant	`BaseUnix`	file open mode: Write to disc at once.
`O_TRUNC`	constant	`BaseUnix`	file open mode: Truncate file to length 0.
`O_WRONLY`	constant	`BaseUnix`	file open mode: Write only.
`ObjectBinaryToText`	procedure	`Classes`	Converts an object stream from a binary to a text format.
`ObjectResourceToText`	procedure	`Classes`	Converts an object stream from a (windows) resource to a text format.
`Objects`	property	`Classes`	Indexed access to the objects associated with the strings in the list.
`ObjectTextToBinary`	procedure	`Classes`	Converts an object stream from a text to a binary format.
`ObjectTextToResource`	procedure	`Classes`	Converts an object stream from a text to a (windows) resource format.
`ObjType`	variable	`Objects`	Unique identifier for this object type.
`OBMP_Table1`	variable	`unicodedata`	Data for code points above U+FFFF, table 1.
`OBMP_Table2`	variable	`unicodedata`	Data for code points above U+FFFF, table 2.
`ObservableMemberAttribute`	class	`Classes`
`ObserverAdded`	procedure	`Classes`
`Observers`	property	`Classes`
`OctStr`	function	`System`	Convert integer to a string with octal representation.
`Odd`	function	`System`	Is a value odd or even ?
`off_t`	type	`BaseUnix`	Offset type.
`off_t`	type	`Unix`	Offset type.
`off_t`	type	`unixtype`	Offset type.
`off64_t`	type	`unixtype`	64-bit offset type.
`offset`	variable	`go32`	Offset in segment.
`Offset`	variable	`Objects`	String offset in stream.
`Offset`	procedure	`Types`
`Offset`	procedure	`Types`
`Offset`	procedure	`Types`
`Offset`	procedure	`Types`
`Offset`	procedure	`Types`
`Offset`	variable	`TypInfo`	Stack offset or index of register.
`OffsetRect`	function	`Types`	Offset the rectangle.
`Ofs`	variable	`Objects`	Pointer offset.
`Ofs`	function	`System`	Return offset of a variable.
`OldCreateOrder`	property	`Classes`	Determines when OnCreate and OnDestroy are triggered.
`OldEnhancedVideoBuf`	variable	`video`
`OldLace`	constant	`System.UITypes`
`OldLace`	constant	`System.UITypes`
`oldmask`	variable	`BaseUnix`	Old signal mask.
`OldVideoBuf`	variable	`video`	Last written screen image.
`OlePromotion`	function	`Variants`
`olevarfromint`	variable	`System`	Called to convert a value to a variant.
`olevarfromlstr`	variable	`System`	Called to convert a value to a variant.
`olevarfrompstr`	variable	`System`	Called to convert a value to a variant.
`olevarfromvar`	variable	`System`	Called to convert a value to a variant.
`OleVariantInt64AsDouble`	variable	`Variants`	How to convert Int64 variants.
`Olive`	constant	`System.UITypes`
`Olive`	constant	`System.UITypes`
`OliveDrab`	constant	`System.UITypes`
`OliveDrab`	constant	`System.UITypes`
`OnAncestorNotFound`	property	`Classes`	Handler called when the ancestor component cannot be found.
`OnBeep`	variable	`sysutils`	Event called by Beep to actually implement beep.
`OnCanObserve`	property	`Classes`
`OnChange`	property	`Classes`	Occurs when one of the action's properties changes.
`OnChange`	property	`Classes`	Event handler triggered when the action's properties change.
`OnChange`	property	`Classes`	Event triggered after the list was modified.
`OnChanging`	property	`Classes`	Event triggered when the list is about to be modified.
`OnCompare`	property	`fgl`	Alias for OnKeyCompare.
`OnCompare`	property	`fgl`	Alias for OnKeyCompare.
`OnCompare`	property	`fgl`	Alias for OnKeyCompare.
`OnCreate`	property	`Classes`	Event handler, called when the datamodule is created.
`OnCreateComponent`	property	`Classes`	Handler called when a component needs to be created.
`OnCreateGUID`	variable	`sysutils`	Callback to create GUID values.
`OnDataCompare`	property	`fgl`	Compare function for data values.
`OnDataCompare`	property	`fgl`	Compare function for data values.
`OnDataCompare`	property	`fgl`	Compare function for data values.
`OnDataPtrCompare`	property	`fgl`	Callback to compare 2 data items.
`OnDestroy`	property	`Classes`	Event handler, called when the datamodule is destroyed.
`OneHour`	constant	`DateUtils`	One hour as a fraction of a day (suitable for TDateTime).
`OneMillisecond`	constant	`DateUtils`	One millisecond as a fraction of a day (suitable for TDateTime).
`OneMinute`	constant	`DateUtils`	One minute as a fraction of a day (suitable for TDateTime).
`OnError`	property	`Classes`	Handler called when an error occurs.
`OneSecond`	constant	`DateUtils`	One second as a fraction of a day (suitable for TDateTime).
`OnExecute`	property	`Classes`	Event triggered when the action executes.
`OnFindAncestor`	property	`Classes`	Event occurring when an ancestor component must be found.
`OnFindComponentClass`	property	`Classes`	Handler called when a component class reference needs to be found.
`OnFindComponentClassEx`	property	`Classes`
`OnFindMethod`	property	`Classes`	Handler to find or change a method address.
`OnGetApplicationName`	variable	`sysutils`	Callback to get a customized application name.
`OnGetDeltaStreams`	property	`Classes`
`OnGetPropValue`	constant	`TypInfo`	Callback to get a property value as a variant.
`OnGetTempDir`	variable	`sysutils`	Handler for GetTempDir function.
`OnGetTempFile`	variable	`sysutils`	Handler for GetTempFileName function.
`OnGetVariantprop`	constant	`TypInfo`	Callback to get a variant property value.
`OnGetVendorName`	variable	`sysutils`	Vendor name callback.
`OnKeyCompare`	property	`fgl`	Compare function for key values.
`OnKeyCompare`	property	`fgl`	Compare function for key values.
`OnKeyCompare`	property	`fgl`	Compare function for key values.
`OnKeyPtrCompare`	property	`fgl`	Callback to compare 2 keys.
`OnObserverAdded`	property	`Classes`
`OnObserverCurrent`	property	`Classes`
`OnObserverToggle`	property	`Classes`
`OnPropertyNotFound`	property	`Classes`	Handler for treating missing properties.
`OnPtrCompare`	property	`fgl`	Alias for OnKeyPtrCompare.
`OnQueryInterface`	property	`System`
`OnReadStringProperty`	property	`Classes`	Handler for translating strings when read from the stream.
`OnReferenceName`	property	`Classes`	Handler called when another component is referenced.
`OnSetMethodProperty`	property	`Classes`	Handler for setting method properties.
`OnSetName`	property	`Classes`	Handler called when setting a component name.
`OnSetPropValue`	constant	`TypInfo`	Callback to set a property value as a variant.
`OnSetVariantprop`	constant	`TypInfo`	Callback to set a variant property value.
`OnShowException`	variable	`sysutils`	Callback to show unhandled exceptions.
`OnTerminate`	property	`Classes`	Event called when the thread terminates.
`OnUpdate`	property	`Classes`	Event triggered when the application is idle.
`OnWriteMethodProperty`	property	`Classes`	Handler from writing method properties.
`OnWriteStringProperty`	property	`Classes`	Event handler for translating strings written to stream.
`OpaquePointer`	type	`System`	Type alias for POpaqueData.
`Open`	procedure	`Objects`	Open the file if it is closed.
`Open`	procedure	`Objects`	Open the file stream.
`Open`	procedure	`Objects`	Open the stream.
`Open_Accmode`	constant	`Unix`	Bitmask to determine access mode in open flags.
`Open_Append`	constant	`Unix`	File open mode: Append to file.
`Open_Creat`	constant	`Unix`	File open mode: Create if file does not yet exist.
`Open_Direct`	constant	`Unix`	File open mode: Minimize caching effects.
`Open_Directory`	constant	`Unix`	File open mode: File must be directory.
`Open_Excl`	constant	`Unix`	File open mode: Open exclusively.
`Open_LargeFile`	constant	`Unix`	File open mode: Open for 64-bit I/O.
`Open_NDelay`	constant	`Unix`	File open mode: Alias for .
`Open_NoCtty`	constant	`Unix`	File open mode: No TTY control.
`Open_NoFollow`	constant	`Unix`	File open mode: Fail if file is symbolic link.
`Open_NonBlock`	constant	`Unix`	File open mode: Open in non-blocking mode.
`Open_RdOnly`	constant	`Unix`	File open mode: Read only.
`Open_RdWr`	constant	`Unix`	File open mode: Read/Write.
`Open_Sync`	constant	`Unix`	File open mode: Write to disc at once.
`Open_Trunc`	constant	`Unix`	File open mode: Truncate file to length 0.
`Open_WrOnly`	constant	`Unix`	File open mode: Write only.
`OpenBit`	function	`Classes`	Returns the position of the first bit that is set to False.
`OpenExeFile`	function	`exeinfo`	Open an executable file.
`openfunc`	variable	`System`	File open function.
`OpRange`	procedure	`Classes`
`OptArg`	variable	`getopts`	Set to the argument of an option, if the option needs one.
`OptErr`	variable	`getopts`	Indicates whether getopt() prints error messages.
`OptInd`	variable	`getopts`	Index of the current paramstr().
`Optional_Argument`	constant	`getopts`	Specifies that a long option optionally takes an argument.
`Options`	property	`Classes`	A set of - various boolean properties.
`OptOpt`	variable	`getopts`	In case of an error, contains the character causing the error.
`OptSpecifier`	constant	`getopts`	Character indicating an option on the command-line.
`Orange`	constant	`System.UITypes`
`Orange`	constant	`System.UITypes`
`OrangeRed`	constant	`System.UITypes`
`OrangeRed`	constant	`System.UITypes`
`OrBits`	procedure	`Classes`	Performs an or operation on the bits.
`Orchid`	constant	`System.UITypes`
`Orchid`	constant	`System.UITypes`
`Ord`	function	`System`	Return ordinal value of an ordinal type.
`Orderings`	enumeration	`getopts`	Command-line ordering options.
`OrdinalVarTypes`	constant	`Variants`	Constant describing which variant types are considered ordinals.
`OrPut`	constant	`Graph`	Draw operation: use OR.
`OrRange`	procedure	`Classes`
`OS`	variable	`System`	Operating system entry information.
`OSfunctions`	topic	`System`	Operating System functions.
`OutOfMemoryError`	procedure	`sysutils`	Raise an EOutOfMemory exception.
`outportb`	procedure	`go32`	Write byte to I/O port.
`outportl`	procedure	`go32`	Write longint to I/O port.
`outportw`	procedure	`go32`	Write word to I/O port.
`Output`	variable	`System`	Standard output text file.
`OutString`	function	`System`
`OutText`	procedure	`Graph`	Write text on the screen at the current location.
`OutTextXY`	variable	`Graph`	Write text on the screen on given position.
`OutTextXY`	variable	`Graph`	Mode OutTextXY routine.
`OutTextXYProc`	procedure type	`Graph`	This routine prototype is a hook for .
`overflowflag`	constant	`go32`	Check for overflow flag in .
`Overhead`	variable	`System`	Total bytes of overhead by memory manager.
`owned`	variable	`gpm`	?
`Owner`	function	`Classes`	Owner of the collection.
`Owner`	property	`Classes`	Owner of this component.
`Owner`	property	`Classes`	Owner of the component being read.
`OwnsEncoding`	property	`Classes`	Does the stream instance owns the encoding.
`OwnsObjects`	property	`Classes`	Determines whether the stringlist owns it's objects or not.
`OwnsStream`	property	`Classes`
`OWordRec`	record	`sysutils`	Identical to the Int128Rec record.

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