1 files changed, 65 insertions, 0 deletions
diff --git a/libodb-qt/odb/qt/basic/pgsql/quuid-traits.hxx b/libodb-qt/odb/qt/basic/pgsql/quuid-traits.hxx
new file mode 100644
index 0000000..5999b7e
--- /dev/null
+++ b/libodb-qt/odb/qt/basic/pgsql/quuid-traits.hxx
@@ -0,0 +1,65 @@
+// file      : odb/qt/basic/pgsql/uuid-traits.hxx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_QT_BASIC_PGSQL_UUID_TRAITS_HXX
+#define ODB_QT_BASIC_PGSQL_UUID_TRAITS_HXX
+
+#include <odb/pre.hxx>
+
+#include <cstring> // std::memcpy
+
+#include <QtCore/QUuid>
+
+#include <odb/pgsql/traits.hxx>
+
+namespace odb
+{
+  namespace pgsql
+  {
+    template <>
+    class default_value_traits<QUuid, id_uuid>
+    {
+    public:
+      typedef QUuid value_type;
+      typedef value_type query_type;
+      typedef unsigned char* image_type;
+
+      // PostgreSQL binary UUID representation is big-endian in the RFC 4122,
+      // section 4.1.2 order. While Qt provides (since 4.8) to/fromRfc4122(),
+      // they both incur a memory allocation (by QByteArray) which we could
+      // avoid, if we did it ourselves.
+      //
+
+      static void
+      set_value (value_type& v, const unsigned char* i, bool is_null)
+      {
+        if (!is_null)
+          v = QUuid::fromRfc4122 (
+            QByteArray (reinterpret_cast<const char*> (i), 16));
+        else
+          v = QUuid ();
+      }
+
+      static void
+      set_image (unsigned char* i, bool& is_null, const value_type& v)
+      {
+        // If we can, store nil as NULL. Otherwise, store it as a value.
+        //
+        is_null = is_null && v.isNull ();
+
+        if (!is_null)
+          std::memcpy (i, v.toRfc4122 ().constData (), 16);
+      }
+    };
+
+    template <>
+    struct default_type_traits<QUuid>
+    {
+      static const database_type_id db_type_id = id_uuid;
+    };
+  }
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_QT_BASIC_PGSQL_UUID_TRAITS_HXX