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comparison bn_mp_radix_size.c @ 190:d8254fc979e9 libtommath-orig LTM_0.35

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Initial import of libtommath 0.35
author Matt Johnston <matt@ucc.asn.au>
date Fri, 06 May 2005 08:59:30 +0000
parents d29b64170cf0
children
comparison
equal deleted inserted replaced
142:d29b64170cf0 190:d8254fc979e9
33 /* make sure the radix is in range */ 33 /* make sure the radix is in range */
34 if (radix < 2 || radix > 64) { 34 if (radix < 2 || radix > 64) {
35 return MP_VAL; 35 return MP_VAL;
36 } 36 }
37 37
38 /* init a copy of the input */ 38 if (mp_iszero(a) == MP_YES) {
39 if ((res = mp_init_copy (&t, a)) != MP_OKAY) { 39 *size = 2;
40 return res; 40 return MP_OKAY;
41 } 41 }
42 42
43 /* digs is the digit count */ 43 /* digs is the digit count */
44 digs = 0; 44 digs = 0;
45 45
46 /* if it's negative add one for the sign */ 46 /* if it's negative add one for the sign */
47 if (t.sign == MP_NEG) { 47 if (a->sign == MP_NEG) {
48 ++digs; 48 ++digs;
49 t.sign = MP_ZPOS;
50 } 49 }
51 50
51 /* init a copy of the input */
52 if ((res = mp_init_copy (&t, a)) != MP_OKAY) {
53 return res;
54 }
55
56 /* force temp to positive */
57 t.sign = MP_ZPOS;
58
52 /* fetch out all of the digits */ 59 /* fetch out all of the digits */
53 while (mp_iszero (&t) == 0) { 60 while (mp_iszero (&t) == MP_NO) {
54 if ((res = mp_div_d (&t, (mp_digit) radix, &t, &d)) != MP_OKAY) { 61 if ((res = mp_div_d (&t, (mp_digit) radix, &t, &d)) != MP_OKAY) {
55 mp_clear (&t); 62 mp_clear (&t);
56 return res; 63 return res;
57 } 64 }
58 ++digs; 65 ++digs;