3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
8 * The library was designed directly after the MPI library by
9 * Michael Fromberger but has been written from scratch with
10 * additional optimizations in place.
12 * The library is free for all purposes without any express
15 * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
18 /* stores a bignum as a ASCII string in a given radix (2..64) */
19 int mp_toradix (mp_int * a, char *str, int radix)
26 /* check range of the radix */
27 if (radix < 2 || radix > 64) {
31 /* quick out if its zero */
32 if (mp_iszero(a) == 1) {
38 if ((res = mp_init_copy (&t, a)) != MP_OKAY) {
42 /* if it is negative output a - */
43 if (t.sign == MP_NEG) {
50 while (mp_iszero (&t) == 0) {
51 if ((res = mp_div_d (&t, (mp_digit) radix, &t, &d)) != MP_OKAY) {
55 *str++ = mp_s_rmap[d];
59 /* reverse the digits of the string. In this case _s points
60 * to the first digit [exluding the sign] of the number]
62 bn_reverse ((unsigned char *)_s, digs);
64 /* append a NULL so the string is properly terminated */
73 /* $Source: /cvs/libtom/libtommath/bn_mp_toradix.c,v $ */
74 /* $Revision: 1.3 $ */
75 /* $Date: 2006/03/31 14:18:44 $ */