[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'System' (#rtl)

Reference for unit 'System': Procedures and functions

Abs

  

Calculate absolute value

AbstractError

  

Generate an abstract error.

AcquireExceptionObject

  

Obtain a reference to the current exception object

add(variant,variant):variant

  

Implement addition (+) operation on variants.

AddExitProc

  

Add an exit procedure to the exit procedure chain.

Addr

  

Return address of a variable

Align

  

Return aligned version of an address

AllocMem

  

Allocate and clear memory.

AnsiToUtf8

  

Convert ansi string to UTF-8 string

Append

  

Open a file in append mode

ArcTan

  

Calculate inverse tangent

ArrayStringToPPchar

  

Concert an array of string to an array of null-terminated strings

Assert

  

Check validity of a given condition.

Assign

  

Assign a name to a file

assign(olevariant):Real

  

Assign an ole- variant to a real-precision float

assign(olevariant):single

  

Assign an ole- variant to a single-precision float

assign(olevariant):UnicodeString

  

Assign an ole-variant to a unicode string

assign(Real):olevariant

  

Assign a real-precision float to an ole-variant

assign(Real):variant

  

Assign a real-precision float to a variant

assign(single):olevariant

  

Assign a single-precision float to an ole-variant

assign(single):variant

  

Assign a single-precision float to a variant

assign(UCS4String):variant

  

Assign UCS4String to a variant, performing the necessary conversions

assign(UnicodeString):olevariant

  

Assign a unicodestring to an ole-variant

assign(UnicodeString):variant

  

Assign UnicodeString to a variant, performing the necessary conversions

assign(UTF8String):variant

  

Assign an UTF-8 string to a variant, performing the necessary conversions

assign(variant):Real

  

Assign a variant to a real-precision float

assign(variant):single

  

Assign a variant to a single-precision float

assign(variant):unicodestring

  

Assign a variant to a unicodestring

assign(variant):UTF8String

  

Assign a variant to an UTF8String

Assigned

  

Check if a pointer is valid

BasicEventCreate

  

Obsolete. Don't use

BasicEventDestroy

  

Obsolete. Don't use

BasicEventResetEvent

  

Obsolete. Don't use

BasicEventSetEvent

  

Obsolete. Don't use

BasicEventWaitFor

  

Obsolete. Don't use

BeginThread

  

Start a new thread.

BEtoN

  

Convert Big Endian-ordered integer to Native-ordered integer

BinStr

  

Convert integer to string with binary representation.

BlockRead

  

Read data from an untyped file into memory

BlockWrite

  

Write data from memory to an untyped file

Break

  

Exit current loop construct.

BsfByte

  

Return the position of the rightmost set bit in an 8-bit value

BsfDWord

  

Return the position of the rightmost set bit in a 32-bit value

BsfQWord

  

Return the position of the rightmost set bit in a 64-bit value

BsfWord

  

Return the position of the rightmost set bit in a 16-bit value

BsrByte

  

Return the position of the leftmost set bit in an 8-bit value

BsrDWord

  

Return the position of the leftmost set bit in a 32-bit value

BsrQWord

  

Return the position of the leftmost set bit in a 64-bit value

BsrWord

  

Return the position of the leftmost set bit in a 16-bit value

CaptureBacktrace

  

Return stack trace

ChDir

  

Change current working directory.

Chr

  

Convert byte value to character value

Close

  

Close a file

CloseThread

  

Close a thread and free up resources used by the thread

CompareByte

  

Compare 2 memory buffers byte per byte

CompareChar

  

compare 2 memory buffers character per character

CompareChar0

  

Compare two buffers character by character till a null-character is reached.

CompareDWord

  

Compare 2 memory buffers DWord per DWord

CompareWord

  

Compare 2 memory buffers word per word

Concat

  

Append one string or dynamic array to another.

Continue

  

Continue with next loop cycle.

Copy

  

Copy part of a string.

CopyArray

  

Copy managed-type elements in array

Cos

  

Calculate cosine of angle

CSeg

  

Return code segment

Dec

  

Decrease value of variable

Default

  

Return Default initialized value

DefaultAnsi2UnicodeMove

  

Standard widestring manager callback

DefaultAnsi2WideMove

  

Standard implementation of Ansi to Widestring conversion routine

DefaultUnicode2AnsiMove

  

Standard widestring manager callback

Delete

  

Delete elements (characters) from a string or dynamic array.

Dispose

  

Free dynamically allocated memory

divide(variant,variant):variant

  

Implement division (/) operation on variants.

DoneCriticalSection

  

Clean up a critical section.

DoneThread

  

End the current thread

DSeg

  

Return data segment

DumpExceptionBacktrace

  

Create backtrace

Dump_Stack

  

Dump stack to the given text file.

DynArrayBounds

  

Return the bounds of the dynamic array

DynArrayClear

  

Clears a dynamic array

DynArrayDim

  

Return the number of dimensions in a dynamic array

DynArrayIndex

  

Return pointer to indicated element

DynArraySetLength

  

Set the length of a dynamic array

DynArraySize

  

Return length of dynamic array

EmptyMethod

  

Empty method alias

EndThread

  

End the current thread.

EnterCriticalSection

  

Enter a critical section

EnumResourceLanguages

  

Enumerate available languages for a resource of given type and name

EnumResourceNames

  

Enumerate available resource names for a specified resource type

EnumResourceTypes

  

Enumerate available resource types

EOF

  

Check for end of file

EOLn

  

Check for end of line

equal(variant,variant):Boolean

  

Implement = (equality) operation on variants.

Erase

  

Delete a file from disk

Error

  

Generate run-time error

Exclude

  

Exclude element from a set if it is present.

Exit

  

Exit current subroutine.

Exp

  

Exponentiate

Fail

  

Fail a constructor

FilePos

  

Get position in file

FileSize

  

Size of file

FillByte

  

Fill memory region with 8-bit pattern

FillChar

  

Fill memory region with certain character

FillDWord

  

Fill memory region with 32-bit pattern

FillWord

  

Fill memory region with 16-bit pattern

Finalize

  

Finalize (clean up) memory block using RTTI

FinalizeArray

  

Finalize managed-type elements in array

FindResource

  

Locate a resource and return a handle to it.

FindResourceEx

  

Find a resource based on type, name, language

float_raise

  

Raise floating point exception

Flush

  

Write file buffers to disk

FlushThread

  

Flush all standard files

FMADouble

  

Internal function, do not use

FMASingle

  

Internal function, do not use

Frac

  

Return fractional part of floating point value.

FreeLibrary

  

For compatibility with Delphi/Windows: Unload a library

Freemem

  

Release allocated memory

Freememory

  

Alias for FreeMem

FreeResource

  

Free a loaded resource

GetCPUCount

  

Return the number of cores on the system

GetCurrentThreadId

  

Return the id of the currently running thread.

GetDir

  

Return the current directory

GetDynLibsManager

  

Return currently active dynamic library support handler

GetFPCHeapStatus

  

Return FPC heap manager status information

GetHeapStatus

  

Return the memory manager heap status.

GetLoadErrorStr

  

Return an error describing the last library loading error

GetMem

  

Allocate new memory on the heap

GetMemory

  

Alias for GetMem

GetMemoryManager

  

Return current memory manager

GetProcAddress

  

For compatibility with Delphi/Windows: Get the address of a procedure

GetProcedureAddress

  

Get the address of a procedure or symbol in a dynamic library.

GetProcessID

  

Get the current process ID

GetResourceManager

  

Return the currently active resource manager

GetTextCodePage

  

Get the codepage used in a text file.

GetThreadID

  

Get the current Thread ID.

GetThreadManager

  

Return the current thread manager

GetTypeKind

  

Return type kind for a type

GetUnicodeStringManager

  

Return a copy of the currently active UnicodeString manager.

GetVariantManager

  

Return the current variant manager.

GetWideStringManager

  

Return a copy of the currently active widestring manager.

get_caller_addr

  

Return the address of the caller.

get_caller_frame

  

Return the frame pointer of the caller

get_caller_stackinfo

  

Return caller stack infomation

get_cmdline

  

Return the command-line as a null-terminated string

get_frame

  

Return the current frame

Get_pc_addr

  

Get Program Counter address

greaterthan(variant,variant):Boolean

  

Implement > (greater than) operation on variants.

greaterthanorequal(variant,variant):Boolean

  

Implement >= (greater than or equal) operation on variants.

Halt

  

Stop program execution.

HexStr

  

Convert integer value to string with hexadecimal representation.

Hi

  

Return high byte/word/nibble of value.

High

  

Return highest index of open array or enumerated

HINSTANCE

  

Windows compatibility type for use in resources

Inc

  

Increase value of integer variable

Include

  

Include element in set if it was not yet present.

IndexByte

  

Search for a byte in a memory range.

IndexChar

  

Search for a character in a memory range.

IndexChar0

  

Return index of a character in null-terminated array of char.

IndexDWord

  

Search for a DWord value in a memory range.

IndexQWord

  

Return the position of a QWord in a memory range

Indexword

  

Search for a WORD value in a memory range.

InitCriticalSection

  

Initialize a critical section

Initialize

  

Initialize memory block using RTTI

InitializeArray

  

Initialize managed-type elements in array

InitThread

  

Initialize a thread

InitThreadVars

  

Initialize threadvars

Insert

  

Insert one string or dynamic array in another.

Int

  

Calculate integer part of floating point value.

intdivide(variant,variant):variant

  

Implement div (integer division) operation on variants.

InterlockedCompareExchange

  

Conditional exchange

InterlockedCompareExchangePointer

  

Compare pointers in an atomic operation

InterlockedDecrement

  

Thread-safe decrement

InterlockedExchange

  

Exchange 2 integers in a thread-safe way

InterlockedExchangeAdd

  

Thread-safe add and exchange of 2 values

InterlockedIncrement

  

Thread-safe increment

IOResult

  

Return result of last file IO operation

IsDynArrayRectangular

  

Check whether all dimensions have the same size

IsMemoryManagerSet

  

Is the memory manager set

Is_IntResource

  

Check whether a resource is an internal resource

KillThread

  

Kill a running thread

LeaveCriticalSection

  

Leave a critical section

leftshift(variant,variant):variant

  

Implement binary shl operation on variants.

Length

  

Returns length of a string or array.

lessthan(variant,variant):Boolean

  

Implement < (less than) operation on variants.

lessthanorequal(variant,variant):Boolean

  

Implement <= (less than or equal) operation on variants.

LEtoN

  

Convert Little Endian-ordered integer to Native-ordered integer

Ln

  

Calculate logarithm

Lo

  

Return low nibble/byte/word of value.

LoadLibrary

  

Load a dynamic library and return a handle to it.

LoadResource

  

Load a resource for use

LockResource

  

Lock a resource

logicaland(variant,variant):variant

  

Implement logical/binary and operation on variants

logicalnot(variant):variant

  

Implement logical/binary not operation on variants

logicalor(variant,variant):variant

  

Implement logical/binary or operation on variants

logicalxor(variant,variant):variant

  

Implement logical/binary xor operation on variants

longjmp

  

Jump to address.

Low

  

Return lowest index of open array or enumerated

LowerCase

  

Return lowercase version of a string.

MakeLangID

  

Create a language ID

MemSize

  

Return the size of a memory block.

MkDir

  

Create a new directory.

modulus(variant,variant):variant

  

Implement mod (modulo) operation on variants.

Move

  

Move data from one location in memory to another

MoveChar0

  

Move data till first zero character

multiply(variant,variant):variant

  

Implement multiplication (*) operation on variants.

negative(variant):variant

  

Implement - (unary minus, negation) operation on variants.

New

  

Dynamically allocate memory for variable

NtoBE

  

Convert Native-ordered integer to a Big Endian-ordered integer

NtoLE

  

Convert Native-ordered integer to a Little Endian-ordered integer

Null

  

Null variant

OctStr

  

Convert integer to a string with octal representation.

Odd

  

Is a value odd or even ?

Ofs

  

Return offset of a variable.

Ord

  

Return ordinal value of an ordinal type.

Pack

  

Create packed array from normal array

ParamCount

  

Return number of command-line parameters passed to the program.

ParamStr

  

Return value of a command-line argument.

Pi

  

Return the value of PI.

PopCnt

  

Count number of set bits

Pos

  

Search for substring in a string.

power(variant,variant):variant

  

Implement power (**) operation on variants.

Pred

  

Return previous element for an ordinal type.

Prefetch

  

Prefetch a memory location

Ptr

  

Combine segment and offset to pointer

RaiseList

  

List of currently raised exceptions.

Random

  

Generate random number

Randomize

  

Initialize random number generator

Read

  

Read from a text file into variable

ReadBarrier

  

Memory Read Barrier

ReadDependencyBarrier

  

Memory Read Dependency Barrier

ReadLn

  

Read from a text file into variable and goto next line

ReadStr

  

Read variables from a string

ReadWriteBarrier

  

Memory read/write barrier

Real2Double

  

Convert Turbo Pascal style real to double.

ReAllocMem

  

Re-allocate memory on the heap

ReAllocMemory

  

Alias for ReAllocMem

ReleaseExceptionObject

  

Decrease the reference count of the current exception object.

Rename

  

Rename file on disk

Reset

  

Open file for reading

ResumeThread

  

Resume a suspended thread.

Rewrite

  

Open file for writing

rightshift(variant,variant):variant

  

Implement binary shr operation on variants.

RmDir

  

Remove directory when empty.

RolByte

  

Rotate bits of a byte value to the left

RolDWord

  

Rotate bits of a DWord (cardinal) value to the left

RolQWord

  

Rotate bits of a QWord (64-bit) value to the left

RolWord

  

Rotate bits of a word value to the left

RorByte

  

Rotate bits of a byte value to the right

RorDWord

  

Rotate bits of a DWord (cardinal) value to the right

RorQWord

  

Rotate bits of a QWord (64-bit) value to the right

RorWord

  

Rotate bits of a word value to the right

Round

  

Round floating point value to nearest integer number.

RTLEventCreate

  

Create a new RTL event

RTLEventDestroy

  

Destroy a RTL Event

RTLEventResetEvent

  

Reset an event

RTLEventSetEvent

  

Notify threads of the event.

RTLEventWaitFor

  

Wait for an event.

RunError

  

Generate a run-time error.

SafeLoadLibrary

  

Load a library safely

SarInt64

  

64-bit Shift Arithmetic Right

SarLongint

  

32-bit Shift Arithmetic Right

SarShortint

  

8-bit Shift Arithmetic Right

SarSmallint

  

16-bit Shift Arithmetic Right

Seek

  

Set file position

SeekEOF

  

Set file position to end of file

SeekEOLn

  

Set file position to end of line

Seg

  

Return segment

SetCodePage

  

Set the codepage of a string

SetDynLibsManager

  

Set a new handler for dynamic library support

Setjmp

  

Save current execution point.

SetLength

  

Set length of a string or dynamic array.

SetMemoryManager

  

Set a memory manager

SetMultiByteConversionCodePage

  

Set codepage for conversions from multi-byte strings to single-byte strings

SetMultiByteFileSystemCodePage

  

Set codepage used when passing strings to OS single-byte file system APIs

SetMultiByteRTLFileSystemCodePage

  

Set codepage used when interpreting strings from OS single-byte file system APIs

SetResourceManager

  

Set the resource manager

SetString

  

Set length of a string and copy buffer.

SetTextBuf

  

Set size of text file internal buffer

SetTextCodePage

  

Set the codepage used in a text file.

SetTextLineEnding

  

Set the end-of-line character for the given text file.

SetThreadManager

  

Set the thread manager, optionally return the current thread manager.

SetUnicodeStringManager

  

Set the unicodestring manager

SetVariantManager

  

Set the current variant manager.

SetWideStringManager

  

Set the widestring manager

ShortCompareText

  

Compare 2 shortstrings

Sin

  

Calculate sine of angle

SizeOf

  

Return size of a variable or type.

SizeofResource

  

Return the size of a particular resource

Slice

  

Return part of an array

Space

  

Return a string of spaces

SPtr

  

Return current stack pointer

Sqr

  

Calculate the square of a value.

Sqrt

  

Calculate the square root of a value

SSeg

  

Return stack segment register value.

StackTop

  

Top location of the stack.

Str

  

Convert a numerical or enumeration value to a string.

StringCodePage

  

Get the code page of a string

StringElementSize

  

Get the character size of a string.

StringOfChar

  

Return a string consisting of 1 character repeated N times.

StringRefCount

  

Get the reference count of a string

StringToPPChar

  

Split string in list of null-terminated strings

StringToUnicodeChar

  

Convert an ansistring to a null-terminated array of Unicode characters.

StringToWideChar

  

Convert a string to an array of widechars.

StrLen

  

Length of a null-terminated string.

StrPas

  

Convert a null-terminated string to a shortstring.

subtract(variant,variant):variant

  

Implement subtraction (-) operation on variants.

Succ

  

Return next element of ordinal type.

SuspendThread

  

Suspend a running thread.

Swap

  

Swap high and low bytes/words of a variable

SwapEndian

  

Swap endianness of the argument

SysAllocMem

  

System memory manager: Allocate memory

SysAssert

  

Standard Assert failure implementation

SysBacktraceStr

  

Format an address suitable for inclusion in a backtrace

SysFlushStdIO

  

Flush all standard IO file descriptors

SysFreemem

  

System memory manager free routine.

SysFreememSize

  

System memory manager free routine.

SysGetFPCHeapStatus

  

Return the status of the FPC heapmanager

SysGetHeapStatus

  

System implementation of GetHeapStatus

SysGetmem

  

System memory manager memory allocator.

SysInitExceptions

  

Initialize exceptions.

SysInitFPU

  

Initialize the FPU

SysInitStdIO

  

Initialize standard input and output.

SysMemSize

  

System memory manager: free size.

SysReAllocMem

  

System memory manager: Reallocate memory

SysResetFPU

  

Reset the floating point unit.

SysSetCtrlBreakHandler

  

System CTRL-C handler

SysTryResizeMem

  

System memory manager: attempt to resize memory.

ThreadGetPriority

  

Return the priority of a thread.

ThreadSetPriority

  

Set the priority of a thread.

ThreadSwitch

  

Signal possibility of thread switch

ToSingleByteFileSystemEncodedFileName

  

Convert string to encoding for use in single-byte file system API

Trunc

  

Truncate a floating point value.

Truncate

  

Truncate the file at position

TryEnterCriticalSection

  

Try entering a critical section

TypeInfo

  

Return pointer to type information for type

TypeOf

  

Return pointer to VMT of an object

UCS4StringToUnicodeString

  

Convert a UCS-4 encoded string to a Unicode string

UCS4StringToWideString

  

Unassigned

  

Unassigned variant.

UnicodeCharLenToString

  

Convert a memory buffer with Unicode characters to a unicodestring

UnicodeCharLenToStrVar

  

Convert a memory buffer with Unicode characters to an ansistring

UnicodeCharToString

  

Convert Unicode character to string

UnicodeCharToStrVar

  

Convert a null-terminated memory buffer with Unicode characters to an ansistring

UnicodeStringToUCS4String

  

Convert a Unicode string to a UCS-4 string.

UnicodeToUtf8

  

UniqueString

  

Make sure reference count of string is 1

UnloadLibrary

  

Unload a previously loaded library

UnlockResource

  

Unlock a previously locked resource

UnPack

  

Create unpacked array from packed array

UpCase

  

Convert a string to all uppercase.

Utf8CodePointLen

  

Length of an UTF-8 codepoint.

UTF8Decode

  

Convert an UTF-8 encoded ansistring to a unicodestring

UTF8Encode

  

Convert a widestring or unicodestring to an UTF-8 encoded ansistring

Utf8ToAnsi

  

Convert a UTF-8 encoded Unicode string to an ansistring

UTF8ToString

  

Convert UTF8 to Unicode String

Utf8ToUnicode

  

Convert a buffer with UTF-8 characters to widestring characters

Val

  

Calculate numerical/enumerated value of a string.

VarArrayGet

  

Get a value from a single cell of a variant array

VarArrayPut

  

Put a value in a single cell of a variant array

VarArrayRedim

  

Redimension a variant array

VarCast

  

Cast a variant to a certain type

WaitForThreadTerminate

  

Wait for a thread to terminate.

WideCharLenToString

  

Convert a length-limited array of widechar to an unicodestring

WideCharLenToStrVar

  

Convert a length-limited array of widechar to an ansistring

WideCharToString

  

Convert a null-terminated array of widechar to an unicodestring

WideCharToStrVar

  

Convert a null-terminated array of widechar to an ansistring

WideStringToUCS4String

  

Convert a widestring to a UCS-4 encoded string.

Write

  

Write variable to a text file or standard output

WriteBarrier

  

Memory write barrier

WriteLn

  

Write variable to a text file or standard output and append newline

WriteStr

  

Write variables to a string


Documentation generated on: Jun 23 2021