JCL Help:ClearBit@Byte@TBitRange
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Summary
Clears a bit in an integer-type value.
Pascal
function ClearBit(const Value: Byte; const Bit: TBitRange): Byte; overload;
function ClearBit(const Value: Shortint; const Bit: TBitRange): Shortint; overload;
function ClearBit(const Value: Smallint; const Bit: TBitRange): Smallint; overload;
function ClearBit(const Value: Word; const Bit: TBitRange): Word; overload;
function ClearBit(const Value: Integer; const Bit: TBitRange): Integer; overload;
function ClearBit(const Value: Cardinal; const Bit: TBitRange): Cardinal; overload;
function ClearBit(const Value: Int64; const Bit: TBitRange): Int64; overload;
Parameters
| Parameters | Description |
| const Value: Byte | The integer-typed variable for which to clear a bit. |
| const Bit: TBitRange | The 0 based bit position of the bit to clear. This is a modulo N bit position where N is the number of bits in the Value parameter. For example, if Value is a Byte, then Bit position is interpreted as Bit mod 8. |
Return Value
Copy of Value with the bit at position Bit cleared.
Description
ClearBit clears the specified bit position of the passed integer typed variable. In other words, it sets the bit at position Bit for Value to 0. This function exists in 7 different forms, one for each integer type.
See Also
TestBit TestBits ToggleBit SetBit
About
Unit
Donator
Marcel van Brakel
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