--- /dev/null
+/* TomsFastMath, a fast ISO C bignum library.
+ *
+ * This project is meant to fill in where LibTomMath
+ * falls short. That is speed ;-)
+ *
+ * This project is public domain and free for all purposes.
+ *
+ * Tom St Denis, tomstdenis@gmail.com
+ */
+#include <tfm_private.h>
+
+int fp_radix_size(fp_int *a, int radix, int *size)
+{
+ 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;
+ }
+
+ 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;
+
+}
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */