Subversion Repositories planix.SVN

#include "os.h"
#include <mp.h>
#include "dat.h"

// convert an mpint into a little endian byte array (least significant byte first)
//   return number of bytes converted
//   if p == nil, allocate and result array
int
mptole(mpint *b, uchar *p, uint n, uchar **pp)
{
        int m;

        m = (mpsignif(b)+7)/8;
        if(m == 0)
                m++;
        if(p == nil){
                n = m;
                p = malloc(n);
                if(p == nil)
                        sysfatal("mptole: %r");
                setmalloctag(p, getcallerpc(&b));
        } else if(n < m)
                return -1;
        if(pp != nil)
                *pp = p;
        mptolel(b, p, n);
        return m;
}