summaryrefslogtreecommitdiffstats
path: root/libtommath/bn_mp_div_d.c
diff options
context:
space:
mode:
Diffstat (limited to 'libtommath/bn_mp_div_d.c')
-rw-r--r--libtommath/bn_mp_div_d.c128
1 files changed, 64 insertions, 64 deletions
diff --git a/libtommath/bn_mp_div_d.c b/libtommath/bn_mp_div_d.c
index a5dbc59..141db1d 100644
--- a/libtommath/bn_mp_div_d.c
+++ b/libtommath/bn_mp_div_d.c
@@ -34,78 +34,78 @@ static int s_is_power_of_two(mp_digit b, int *p)
}
/* single digit division (based on routine from MPI) */
-int mp_div_d (mp_int * a, mp_digit b, mp_int * c, mp_digit * d)
+int mp_div_d(mp_int *a, mp_digit b, mp_int *c, mp_digit *d)
{
- mp_int q;
- mp_word w;
- mp_digit t;
- int res, ix;
-
- /* cannot divide by zero */
- if (b == 0) {
- return MP_VAL;
- }
-
- /* quick outs */
- if ((b == 1) || (mp_iszero(a) == MP_YES)) {
- if (d != NULL) {
- *d = 0;
- }
- if (c != NULL) {
- return mp_copy(a, c);
- }
- return MP_OKAY;
- }
-
- /* power of two ? */
- if (s_is_power_of_two(b, &ix) == 1) {
- if (d != NULL) {
- *d = a->dp[0] & ((((mp_digit)1)<<ix) - 1);
- }
- if (c != NULL) {
- return mp_div_2d(a, ix, c, NULL);
- }
- return MP_OKAY;
- }
+ mp_int q;
+ mp_word w;
+ mp_digit t;
+ int res, ix;
+
+ /* cannot divide by zero */
+ if (b == 0) {
+ return MP_VAL;
+ }
+
+ /* quick outs */
+ if ((b == 1) || (mp_iszero(a) == MP_YES)) {
+ if (d != NULL) {
+ *d = 0;
+ }
+ if (c != NULL) {
+ return mp_copy(a, c);
+ }
+ return MP_OKAY;
+ }
+
+ /* power of two ? */
+ if (s_is_power_of_two(b, &ix) == 1) {
+ if (d != NULL) {
+ *d = a->dp[0] & ((((mp_digit)1)<<ix) - 1);
+ }
+ if (c != NULL) {
+ return mp_div_2d(a, ix, c, NULL);
+ }
+ return MP_OKAY;
+ }
#ifdef BN_MP_DIV_3_C
- /* three? */
- if (b == 3) {
- return mp_div_3(a, c, d);
- }
+ /* three? */
+ if (b == 3) {
+ return mp_div_3(a, c, d);
+ }
#endif
- /* no easy answer [c'est la vie]. Just division */
- if ((res = mp_init_size(&q, a->used)) != MP_OKAY) {
- return res;
- }
-
- q.used = a->used;
- q.sign = a->sign;
- w = 0;
- for (ix = a->used - 1; ix >= 0; ix--) {
- w = (w << ((mp_word)DIGIT_BIT)) | ((mp_word)a->dp[ix]);
-
- if (w >= b) {
- t = (mp_digit)(w / b);
- w -= ((mp_word)t) * ((mp_word)b);
+ /* no easy answer [c'est la vie]. Just division */
+ if ((res = mp_init_size(&q, a->used)) != MP_OKAY) {
+ return res;
+ }
+
+ q.used = a->used;
+ q.sign = a->sign;
+ w = 0;
+ for (ix = a->used - 1; ix >= 0; ix--) {
+ w = (w << ((mp_word)DIGIT_BIT)) | ((mp_word)a->dp[ix]);
+
+ if (w >= b) {
+ t = (mp_digit)(w / b);
+ w -= ((mp_word)t) * ((mp_word)b);
} else {
- t = 0;
+ t = 0;
}
q.dp[ix] = (mp_digit)t;
- }
-
- if (d != NULL) {
- *d = (mp_digit)w;
- }
-
- if (c != NULL) {
- mp_clamp(&q);
- mp_exch(&q, c);
- }
- mp_clear(&q);
-
- return res;
+ }
+
+ if (d != NULL) {
+ *d = (mp_digit)w;
+ }
+
+ if (c != NULL) {
+ mp_clamp(&q);
+ mp_exch(&q, c);
+ }
+ mp_clear(&q);
+
+ return res;
}
#endif