Bitwise comparation - Printable Version

Bitwise comparation - Printable Version

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Bitwise comparation - niCe - 31.10.2009

Please, how to negate this expression - keys & KEY_FIRE. I tried keys ~ KEY_FIRE but this is incorrect syntax for pawno. Thanks in advance for your help.

Re: Bitwise comparation - Nero_3D - 31.10.2009

Valid bitwise character in pawn (you can add your own if you want)

Quote:

Originally Posted by pawn-lang.pdf

~e - results in the one's complement of e.
e1 >> e2 - results in the arithmetic shift to the right of e1 by e2 bits. The shift operation is signed: the leftmost bit of e1 is copied to vacant bits in the result.
e1 >>> e2 - results in the logical shift to the right of e1 by e2 bits. The shift operation is unsigned: the vacant bits of the result are filled with zeros.
e1 << e2 - results in the value of e1 shifted to the left by e2 bits; the rightmost bits are set to zero. There is no distinction between an arithmetic and a logical left shift
e1 & e2 - results in the bitwise logical "and" of e1 and e2.
e1 | e2 - results in the bitwise logical "or" of e1 and e2.
e1 ^ e2 - results in the bitwise "exclusive or" of e1 and e2.

and how to negate some statement

pawn Код:

(statement) == false

pawn Код:

!(statement)

Hope that helped in some way

Re: Bitwise comparation - niCe - 31.10.2009

I didn't even thought of negating that complete expression. Thanks.

Re: Bitwise comparation - Google63 - 31.10.2009

~ = bitwise NOT
! = logical NOT

Simple as that