From df2082d9921d8c8f6d61fd3482cef683f914e4d3 Mon Sep 17 00:00:00 2001
From: Constantin Michael <constantin@codesynthesis.com>
Date: Tue, 27 Sep 2011 17:26:29 +0200
Subject: Implement partial specialization of default_value_traits for
 id_big_int

---
 odb/oracle/details/number.hxx |  8 +++++++
 odb/oracle/traits.hxx         | 55 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)

diff --git a/odb/oracle/details/number.hxx b/odb/oracle/details/number.hxx
index 345cbe0..fe355da 100644
--- a/odb/oracle/details/number.hxx
+++ b/odb/oracle/details/number.hxx
@@ -11,10 +11,18 @@
 
 namespace odb
 {
+  // @@ Revise this.
+  //
+  namespace details
+  {
+  }
+
   namespace oracle
   {
     namespace details
     {
+      using namespace odb::details;
+
       LIBODB_ORACLE_EXPORT long long
       number_to_int64 (const char* buffer);
 
diff --git a/odb/oracle/traits.hxx b/odb/oracle/traits.hxx
index cedf064..1898833 100644
--- a/odb/oracle/traits.hxx
+++ b/odb/oracle/traits.hxx
@@ -22,6 +22,7 @@
 #include <odb/details/wrapper-p.hxx>
 
 #include <odb/oracle/details/export.hxx>
+#include <odb/oracle/details/number.hxx>
 
 namespace odb
 {
@@ -394,6 +395,60 @@ namespace odb
       }
     };
 
+    // id_big_int partial specialization.
+    //
+    template <typename T, bool unsign>
+    struct big_int_value_traits;
+
+    template <typename T>
+    struct big_int_value_traits<T, false>
+    {
+      static void
+      set_value (T v, char* b, bool is_null)
+      {
+        if (!is_null)
+          v = static_cast<T> (details::number_to_int64 (b));
+        else
+          v = 0;
+      }
+
+      static void
+      set_image (char* b, bool& is_null, T v)
+      {
+        is_null = false;
+        details::int64_to_number (b, static_cast<long long> (v));
+      }
+    };
+
+    template <typename T>
+    struct big_int_value_traits<T, true>
+    {
+      static void
+      set_value (T v, char* b, bool is_null)
+      {
+        if (!is_null)
+          v = details::number_to_uint64 (static_cast<unsigned long long> (b));
+        else
+          v = 0;
+      }
+
+      static void
+      set_image (char* b, bool& is_null, T v)
+      {
+        is_null = false;
+        details::uint64_to_number (b, static_cast<unsigned long long> (v));
+      }
+    };
+
+    template <typename T>
+    struct default_value_traits<T, id_big_int>:
+      big_int_value_traits<T, int_traits<T>::unsign>
+    {
+      typedef T value_type;
+      typedef T query_type;
+      typedef typename image_traits<T, id_big_int>::image_type image_type;
+    };
+
     // std::string specialization.
     //
     class LIBODB_ORACLE_EXPORT string_value_traits
-- 
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