RE: circular rotate integers

> -----Original Message-----
> From: Gene_Gaunt@xxxxxxxxxxxxxxx [mailto:Gene_Gaunt@xxxxxxxxxxxxxxx]
> 
> What's the best way in C code to left circular rotate an integer?
> as in:   left_rotate( int X = 0x88002300, 2 ) => 0x2008C002

Of course one would use _rtol() or _lrotl().

But wait, they are non-ANSI 'functions' so you probably wont see them on the 
iSeries, shame about that eh ?

Here's the _lrotl() & _rotl() macro definitions;

#define _lrotr(x, c) ((((unsigned long)(x)) >> ((int) ((c) & 31))) | 
(((unsigned long)(x)) << ((int) ((32 - ((c) & 31))))))
#define _rotr(x, c) (unsigned int) _lrotr((unsigned long) x, c)

[ NOTE : _lrotr is all one long line ]

--phil