api: New function gcry_mpi_point_copy.

* src/gcrypt.h.in (gcry_mpi_point_copy): New.
(mpi_point_copy): New macro.
* src/visibility.c (gcry_mpi_point_copy): New.
* src/libgcrypt.def, src/libgcrypt.vers: Add function.
* mpi/ec.c (_gcry_mpi_point_copy): New.
* tests/t-mpi-point.c (set_get_point): Add test.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/mpi/ec.c b/mpi/ec.c
index 8a6a656c..a0f73575 100644
--- a/mpi/ec.c
+++ b/mpi/ec.c
@@ -139,6 +139,20 @@ point_set (mpi_point_t d, mpi_point_t s)
 }
 
 
+/* Return a copy of POINT. */
+gcry_mpi_point_t
+_gcry_mpi_point_copy (gcry_mpi_point_t point)
+{
+  mpi_point_t newpoint;
+
+  newpoint = _gcry_mpi_point_new (0);
+  if (point)
+    point_set (newpoint, point);
+
+  return newpoint;
+}
+
+
 static void
 point_resize (mpi_point_t p, mpi_ec_t ctx)
 {