#include "os.h"#include <mp.h>#include "dat.h" // convert a little endian byte array (least significant byte first) to an mpintmpint*letomp(uchar *s, uint n, mpint *b){	int i=0, m = 0;	mpdigit x=0; 	if(b == nil)		b = mpnew(0);	mpbits(b, 8*n);	for(; n > 0; n--){		x |= ((mpdigit)(*s++)) << i;		i += 8;		if(i == Dbits){			b->p[m++] = x;			i = 0;			x = 0;		}	}	if(i > 0)		b->p[m++] = x;	b->top = m;	return b;}