Avoid needless alloc and copy

1 files changed, 6 insertions, 0 deletions

diff --git a/src/lib/math/bigint/bigint.h b/src/lib/math/bigint/bigint.h
index 0b826c8f5..8c627c584 100644
--- a/src/lib/math/bigint/bigint.h
+++ b/src/lib/math/bigint/bigint.h
@@ -445,6 +445,12 @@ class BOTAN_PUBLIC_API(2,0) BigInt final
         m_reg[i] = w;
         }
 
+     void set_words(const word w[], size_t len)
+        {
+        m_reg.resize(len);
+        copy_mem(mutable_data(), w, len);
+        }
+
      /**
      * Tests if the sign of the integer is negative
      * @result true, iff the integer has a negative sign