#include "platform.h"
#include "mp.h"

/* return uniform random [0..n-1] */
mpint*
mpnrand(mpint *n, void (*gen)(u8int*, int), mpint *b)
{
	int bits;

	bits = mpsignif(n);
	if(bits == 0)
		abort();
	if(b == nil)
		b = mpnew(bits);
	do{
		mprand(bits, gen, b);
	}while(mpmagcmp(b, n) >= 0);

	return b;
}