Subversion Repositories planix.SVN

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

/*
 *  this code assumes that mpdigit is at least as
 *  big as an int.
 */

mpint*
itomp(int i, mpint *b)
{
        if(b == nil){
                b = mpnew(0);
                setmalloctag(b, getcallerpc(&i));
        }
        b->sign = (i >> (sizeof(i)*8 - 1)) | 1;
        i *= b->sign;
        *b->p = i;
        b->top = 1;
        return mpnorm(b);
}

int
mptoi(mpint *b)
{
        uint x;

        if(b->top==0)
                return 0;
        x = *b->p;
        if(b->sign > 0){
                if(b->top > 1 || (x > MAXINT))
                        x = (int)MAXINT;
                else
                        x = (int)x;
        } else {
                if(b->top > 1 || x > MAXINT+1)
                        x = (int)MININT;
                else
                        x = -(int)x;
        }
        return x;
}