Is it possible to rotate whole variable?
Something likae 0101 0101 0101 0101 -> 1010 1010 1010 1010?
If yes, how? I found so many examples on how to rotate few bits but not the whole variable?
Variable rotate
Is it possible to rotate whole variable?
Something likae 0101 0101 0101 0101 -> 1010 1010 1010 1010?
If yes, how? I found so many examples on how to rotate few bits but not the whole variable?
whole variable is also a few bits ... like 8 * sizeof variableOriginally Posted by Lazar
All problems in computer science can be solved by another level of indirection,
except for the problem of too many layers of indirection.
– David J. Wheeler
Bit-shifting is easily done with bit-wise operators.
There are no native C operators that do a rotate, but you can easily roll your own function to do this. This just requires a bit check, a single shift, and (if necessary) a bit set ... repeated as many times as needed.
Code:unsigned short rotate( unsigned short value ) { return (value << 1) | ((value >> 15) & 1); }
Instead of the magic number 15, it might be better to write: (sizeof(value) * CHAR_BIT - 1)
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