#include "os.h"#include <mp.h>#include "dat.h" /* return uniform random [0..n-1] */mpint*mpnrand(mpint *n, void (*gen)(uchar*, int), mpint *b){	int bits; 	bits = mpsignif(n);	if(bits == 0)		abort();	if(b == nil){		b = mpnew(bits);		setmalloctag(b, getcallerpc(&n));	}	do {		mprand(bits, gen, b);	} while(mpmagcmp(b, n) >= 0); 	return b;}