#include "os.h"#include <mp.h>#include "dat.h" // convert a big-endian byte array (most significant byte first) to an mpintmpint*betomp(uchar *p, uint n, mpint *b){	int m, s;	mpdigit x; 	if(b == nil){		b = mpnew(0);		setmalloctag(b, getcallerpc(&p));	}	mpbits(b, n*8); 	m = DIGITS(n*8);	b->top = m--;	b->sign = 1; 	s = ((n-1)*8)%Dbits;	x = 0;	for(; n > 0; n--){		x |= ((mpdigit)(*p++)) << s;		s -= 8;		if(s < 0){			b->p[m--] = x;			s = Dbits-8;			x = 0;		}	}	return mpnorm(b);}