1 files changed, 60 insertions, 0 deletions
diff --git a/modules/eng_gmp/gmp_mem.cpp b/modules/eng_gmp/gmp_mem.cpp
new file mode 100644
index 000000000..1919c39e1
--- /dev/null
+++ b/modules/eng_gmp/gmp_mem.cpp
@@ -0,0 +1,60 @@
+/*************************************************
+* GNU MP Memory Handlers Source File             *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/eng_gmp.h>
+#include <cstring>
+#include <gmp.h>
+
+namespace Botan {
+
+namespace {
+
+/*************************************************
+* Allocator used by GNU MP                       *
+*************************************************/
+Allocator* gmp_alloc = 0;
+
+/*************************************************
+* Allocation Function for GNU MP                 *
+*************************************************/
+void* gmp_malloc(size_t n)
+   {
+   return gmp_alloc->allocate(n);
+   }
+
+/*************************************************
+* Reallocation Function for GNU MP               *
+*************************************************/
+void* gmp_realloc(void* ptr, size_t old_n, size_t new_n)
+   {
+   void* new_buf = gmp_alloc->allocate(new_n);
+   std::memcpy(new_buf, ptr, std::min(old_n, new_n));
+   gmp_alloc->deallocate(ptr, old_n);
+   return new_buf;
+   }
+
+/*************************************************
+* Deallocation Function for GNU MP               *
+*************************************************/
+void gmp_free(void* ptr, size_t n)
+   {
+   gmp_alloc->deallocate(ptr, n);
+   }
+
+}
+
+/*************************************************
+* Set the GNU MP memory functions                *
+*************************************************/
+void GMP_Engine::set_memory_hooks()
+   {
+   if(gmp_alloc == 0)
+      {
+      gmp_alloc = get_allocator();
+      mp_set_memory_functions(gmp_malloc, gmp_realloc, gmp_free);
+      }
+   }
+
+}