int fp_radix_size(fp_int *a, int radix, int *size)
{
int digs;
fp_int t;
fp_digit d;
*size = 0;
/* check range of the radix */
if (radix < 2 || radix > 64) {
return FP_VAL;
}
/* quick out if its zero */
if (fp_iszero(a) == 1) {
*size = 2;
return FP_OKAY;
}
fp_init_copy(&t, a);
/* if it is negative output a - */
if (t.sign == FP_NEG) {
(*size)++;
t.sign = FP_ZPOS;
}
digs = 0;
while (fp_iszero (&t) == FP_NO) {
fp_div_d (&t, (fp_digit) radix, &t, &d);
(*size)++;
}
/* append a NULL so the string is properly terminated */
(*size)++;
return FP_OKAY;
}
/* c = a mod b, 0 <= c < b */
int fp_mod_d(fp_int *a, fp_digit b, fp_digit *c)
{
return fp_div_d(a, b, NULL, c);
}