BitResetkeyword

Gets the value with a specified bit cleared, from a copied integer.

Syntax

#define BitReset( value, bit_number ) ((value) And Not (Cast(TypeOf(Value), 1) Shl (bit_number)))

Parameters

Return value

Returns the integer value with the specified bit cleared.

Description

This macro expands to a copy of the integer value with the specified bit_number cleared (to off, or `0`). Behaves as `value And Not (1 Shl bit_number)`.
To clear a specified bit in a variable, the following assignment can be used: variable = BitReset( variable, bit_number )

The valid range of values for bit_number depends on the size, in bits, of `TypeOf(value)`, which is `0` (from the lowest bit) through `SizeOf(value) * 8 - 1` (up to the highest bit). See Standard Datatype Limits for a table of the standard datatypes and their sizes.
For the bit_number values outside the valid range, the results of this macro are undefined.

Remarks

Usage


result = BitReset( value, bit_number )


Dialect Differences

• Not available in the -lang qb dialect unless referenced with the alias __Bitreset.
  
  

Differences from QB

• New to FreeBASIC.
  
  

See also

• Bit
  
• BitSet
  
  

Example

Print Bin(BitReset(&b10101, 2))

Print BitReset(5,0)

Print Hex(BitReset(&h8000000000000001,63))

will produce the output:

10001
 4
1

Reference

• Documented in KeyPgBitreset.html