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-rw-r--r--libtommath/bn_mp_lshd.c92
1 files changed, 48 insertions, 44 deletions
diff --git a/libtommath/bn_mp_lshd.c b/libtommath/bn_mp_lshd.c
index ce1e63b..888989a 100644
--- a/libtommath/bn_mp_lshd.c
+++ b/libtommath/bn_mp_lshd.c
@@ -1,4 +1,4 @@
-#include <tommath.h>
+#include <tommath_private.h>
#ifdef BN_MP_LSHD_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis
*
@@ -12,52 +12,56 @@
* The library is free for all purposes without any express
* guarantee it works.
*
- * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
*/
/* shift left a certain amount of digits */
-int mp_lshd (mp_int * a, int b)
+int mp_lshd(mp_int *a, int b)
{
- int x, res;
-
- /* if its less than zero return */
- if (b <= 0) {
- return MP_OKAY;
- }
-
- /* grow to fit the new digits */
- if (a->alloc < a->used + b) {
- if ((res = mp_grow (a, a->used + b)) != MP_OKAY) {
- return res;
- }
- }
-
- {
- register mp_digit *top, *bottom;
-
- /* increment the used by the shift amount then copy upwards */
- a->used += b;
-
- /* top */
- top = a->dp + a->used - 1;
-
- /* base */
- bottom = a->dp + a->used - 1 - b;
-
- /* much like mp_rshd this is implemented using a sliding window
- * except the window goes the otherway around. Copying from
- * the bottom to the top. see bn_mp_rshd.c for more info.
- */
- for (x = a->used - 1; x >= b; x--) {
- *top-- = *bottom--;
- }
-
- /* zero the lower digits */
- top = a->dp;
- for (x = 0; x < b; x++) {
- *top++ = 0;
- }
- }
- return MP_OKAY;
+ int x, res;
+
+ /* if its less than zero return */
+ if (b <= 0) {
+ return MP_OKAY;
+ }
+
+ /* grow to fit the new digits */
+ if (a->alloc < (a->used + b)) {
+ if ((res = mp_grow(a, a->used + b)) != MP_OKAY) {
+ return res;
+ }
+ }
+
+ {
+ mp_digit *top, *bottom;
+
+ /* increment the used by the shift amount then copy upwards */
+ a->used += b;
+
+ /* top */
+ top = a->dp + a->used - 1;
+
+ /* base */
+ bottom = (a->dp + a->used - 1) - b;
+
+ /* much like mp_rshd this is implemented using a sliding window
+ * except the window goes the otherway around. Copying from
+ * the bottom to the top. see bn_mp_rshd.c for more info.
+ */
+ for (x = a->used - 1; x >= b; x--) {
+ *top-- = *bottom--;
+ }
+
+ /* zero the lower digits */
+ top = a->dp;
+ for (x = 0; x < b; x++) {
+ *top++ = 0;
+ }
+ }
+ return MP_OKAY;
}
#endif
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */