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Diffstat (limited to 'libtommath/bn_mp_div_2d.c')
-rw-r--r--libtommath/bn_mp_div_2d.c100
1 files changed, 50 insertions, 50 deletions
diff --git a/libtommath/bn_mp_div_2d.c b/libtommath/bn_mp_div_2d.c
index 635d374..d6723ee 100644
--- a/libtommath/bn_mp_div_2d.c
+++ b/libtommath/bn_mp_div_2d.c
@@ -16,68 +16,68 @@
*/
/* shift right by a certain bit count (store quotient in c, optional remainder in d) */
-int mp_div_2d (mp_int * a, int b, mp_int * c, mp_int * d)
+int mp_div_2d(mp_int *a, int b, mp_int *c, mp_int *d)
{
- mp_digit D, r, rr;
- int x, res;
+ mp_digit D, r, rr;
+ int x, res;
- /* if the shift count is <= 0 then we do no work */
- if (b <= 0) {
- res = mp_copy (a, c);
- if (d != NULL) {
- mp_zero (d);
- }
- return res;
- }
-
- /* copy */
- if ((res = mp_copy (a, c)) != MP_OKAY) {
- return res;
- }
- /* 'a' should not be used after here - it might be the same as d */
+ /* if the shift count is <= 0 then we do no work */
+ if (b <= 0) {
+ res = mp_copy(a, c);
+ if (d != NULL) {
+ mp_zero(d);
+ }
+ return res;
+ }
- /* get the remainder */
- if (d != NULL) {
- if ((res = mp_mod_2d (a, b, d)) != MP_OKAY) {
+ /* copy */
+ if ((res = mp_copy(a, c)) != MP_OKAY) {
return res;
- }
- }
+ }
+ /* 'a' should not be used after here - it might be the same as d */
+
+ /* get the remainder */
+ if (d != NULL) {
+ if ((res = mp_mod_2d(a, b, d)) != MP_OKAY) {
+ return res;
+ }
+ }
- /* shift by as many digits in the bit count */
- if (b >= (int)DIGIT_BIT) {
- mp_rshd (c, b / DIGIT_BIT);
- }
+ /* shift by as many digits in the bit count */
+ if (b >= (int)DIGIT_BIT) {
+ mp_rshd(c, b / DIGIT_BIT);
+ }
- /* shift any bit count < DIGIT_BIT */
- D = (mp_digit) (b % DIGIT_BIT);
- if (D != 0) {
- mp_digit *tmpc, mask, shift;
+ /* shift any bit count < DIGIT_BIT */
+ D = (mp_digit)(b % DIGIT_BIT);
+ if (D != 0) {
+ mp_digit *tmpc, mask, shift;
- /* mask */
- mask = (((mp_digit)1) << D) - 1;
+ /* mask */
+ mask = (((mp_digit)1) << D) - 1;
- /* shift for lsb */
- shift = DIGIT_BIT - D;
+ /* shift for lsb */
+ shift = DIGIT_BIT - D;
- /* alias */
- tmpc = c->dp + (c->used - 1);
+ /* alias */
+ tmpc = c->dp + (c->used - 1);
- /* carry */
- r = 0;
- for (x = c->used - 1; x >= 0; x--) {
- /* get the lower bits of this word in a temp */
- rr = *tmpc & mask;
+ /* carry */
+ r = 0;
+ for (x = c->used - 1; x >= 0; x--) {
+ /* get the lower bits of this word in a temp */
+ rr = *tmpc & mask;
- /* shift the current word and mix in the carry bits from the previous word */
- *tmpc = (*tmpc >> D) | (r << shift);
- --tmpc;
+ /* shift the current word and mix in the carry bits from the previous word */
+ *tmpc = (*tmpc >> D) | (r << shift);
+ --tmpc;
- /* set the carry to the carry bits of the current word found above */
- r = rr;
- }
- }
- mp_clamp (c);
- return MP_OKAY;
+ /* set the carry to the carry bits of the current word found above */
+ r = rr;
+ }
+ }
+ mp_clamp(c);
+ return MP_OKAY;
}
#endif