Print Page - SET / RESET bit in byte ?

Title: SET / RESET bit in byte ?
Post by: paja on March 02, 2010, 05:32:55 PM

Hi,

How can I SET or RESET bit in byte ?

Title: Re: SET / RESET bit in byte ?
Post by: sapero on March 02, 2010, 07:44:54 PM

UINT value = 0

' set 20 bits:  11111111 11111111 10000100 00100001
value |= 0xFFFF8421 ' value is 0xFFFF8421

' toggle one bit 00000000 00000000 00000000 00000001
value = value ^ 1   ' value is 0xFFFF8420

' reset 3 bits
' bits to be reset: 11100000 00000000 00000000 00000000
' mask:             00011111 11111111 11111111 11111111
value &= 0x1FFFFFFF ' value is 0x1FFF8420

Title: Re: SET / RESET bit in byte ?
Post by: ckoehn on March 03, 2010, 11:26:24 AM

I think this should work.

Code Select

SUB SetBit(INT v BYREF, INT vbit BYVAL)
	INT mb
	mb=2^bit
	v|=mb
ENDSUB

SUB ResetBit(INT v BYREF, INT vbit BYVAL)
	INT mb
	mb = 0xFFFFFF-(2^vbit)
	v &= mb
ENDSUB

IonicWind Software

IWBasic => GUI Central => Topic started by: paja on March 02, 2010, 05:32:55 PM