Object Pascal Intrinsic Routines

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This topic lists Object Pascal-only intrinsic routines exposed by the System unit. These intrinsic routines are actually handled by the compiler rather than the run-time library.

Routine Description

System.Abs

Returns an absolute value.

System.Addr

Returns a pointer to a specified object.

System.Append

Prepares an existing file for adding text to the end.

System.Assert

Tests whether a Boolean expression is true.

System.Assigned

Tests for a nil (unassigned) pointer or procedural variable.

System.Assign

Associates the name of an external file with a file variable.

System.AssignFile

Associates the name of an external file with a file variable.

System.BlockRead

Reads one or more records from an open file into a variable.

System.BlockWrite

Writes one or more records from a variable to an open file.

System.Break

Causes the flow of control to exit a for, while, or repeat statement.

System.Chr

Returns the character for a specified ASCII value.

System.Close

Terminates the association between a file variable and an external file.

System.CloseFile

Terminates the association between file variable and an external disk file.

System.Concat

Concatenates two or more strings into one.

System.Continue

Allows the flow of control to proceed to the next iteration of for, while, or repeat statements.

System.Copy

Returns a substring of a string or a segment of a dynamic array.

System.Dec

Decrements a variable by 1 or N.

System.Delete

Removes a substring from a string.

System.Dispose

Releases memory allocated for a dynamic variable.

System.Eof

Tests whether the file position is at the end of a file.

System.Eoln

Tests whether the file pointer is at the end of a line.

System.Erase

Deletes an external file.

System.Exclude

Removes an element from a Object Pascal set.

System.Exit

Exits from the current procedure.

System.FilePos

Returns the current file position.

System.FileSize

Returns the number of records in a file.

System.FillChar

Fills contiguous bytes with a specified value.

System.Finalize

Uninitializes a dynamically allocated variable.

System.Flush

Empties the buffer of a text file opened for output.

System.FreeMem

FreeMem frees a memory block.

System.GetMem

GetMem allocates a memory block.

System.Halt

Initiates abnormal termination of a program.

System.Hi

Returns the high-order byte of X as an unsigned value.

System.High

Returns the highest value in the range of an argument.

System.Inc

Increments an ordinal value by one or N.

System.Include

Adds an element to a Object Pascal set.

System.Initialize

Initializes a dynamically allocated variable.

System.Insert

Inserts a substring into a string beginning at a specified point.

System.Length

Returns the number of characters in a string or elements in an array.

System.Lo

Returns the low order Byte of argument X.

System.Low

Returns the lowest value in a range.

System.New

Creates a new dynamic variable and sets P to point to it.

System.Odd

Returns true if argument is an odd number.

System.Pi

Returns 3.1415926535897932385.

System.Pred

Returns the predecessor of the argument.

System.Ptr

Converts a specified address to a pointer.

System.Read

Read reads data from a file.

System.Readln

Reads a line of text from a file.

System.ReallocMem

ReallocMem reallocates a memory block.

System.Rename

Changes the name of an external file.

System.Reset

Opens an existing file.

System.Rewrite

Creates a new file and opens it.

System.Round

Returns the value of X rounded to the nearest whole number.

System.RunError

Stops execution and generates a runtime error.

System.Seek

Moves the current position of a file to a specified component.

System.SeekEof

Returns the end-of-file status of a file, ignoring whitespace.

System.SeekEoln

Returns the end-of-line status of a file, ignoring whitespace.

System.SetLength

Sets the length of a string or dynamic-array variable.

System.SetString

Sets the contents and length of the given string.

System.SizeOf

Returns the number of bytes occupied by a variable or type.

System.Slice

Returns a sub-section of an array.

System.Sqr

Returns the square of a number.

System.Str

Formats a string and returns it to a variable.

System.Succ

Returns the successor of an argument.

System.Swap

Exchanges high order byte with the low order byte of an integer or word.

System.Trunc

Truncates a real number to an integer.

System.TypeHandle

Returns the RTTI information for a given type.

System.TypeInfo

Returns the RTTI information for a given type.

System.TypeOf

Deprecated routine.

System.Val

Converts a string to a numeric representation.

System.VarCast

Converts a variant to specified type.

System.VarCopy

Copies a Variant to another Variant.

System.Write

Writes to either a typed file or a text file

System.Writeln

Writes to a text file and adds an end-of-line marker.



See Also