From 28b329b63a3919020a9286b557f7938dc8fbd746 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 21 Dec 2011 11:19:24 +0200
Subject: ODB compiler implementation, traits, and types test for SQL Server

---
 odb/mssql/traits.txx | 109 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)

(limited to 'odb/mssql/traits.txx')

diff --git a/odb/mssql/traits.txx b/odb/mssql/traits.txx
index b3bc442..80ee933 100644
--- a/odb/mssql/traits.txx
+++ b/odb/mssql/traits.txx
@@ -3,9 +3,118 @@
 // copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
 // license   : ODB NCUEL; see accompanying LICENSE file
 
+#include <cassert>
+
 namespace odb
 {
   namespace mssql
   {
+    //
+    // wrapped_value_traits<W, ID, true>
+    //
+
+    template <typename W, database_type_id ID>
+    void wrapped_value_traits<W, ID, true>::
+    result_callback (void* context,
+                     std::size_t* position,
+                     void** buffer,
+                     std::size_t* size,
+                     chunk_type chunk,
+                     std::size_t size_left,
+                     void* tmp_buffer,
+                     std::size_t tmp_capacity)
+    {
+      W& v (*static_cast<W*> (context));
+
+      if (chunk == chunk_null)
+        wtraits::set_null (v);
+      else
+      {
+        long_callback& c (*static_cast<long_callback*> (*buffer));
+
+        // Redirect all further calls.
+        //
+        vtraits::set_value (wtraits::set_ref (v),
+                            c.callback.result,
+                            c.context.result);
+
+        // Forward this call.
+        //
+        c.callback.result (
+          c.context.result,
+          position,
+          buffer,
+          size,
+          chunk,
+          size_left,
+          tmp_buffer,
+          tmp_capacity);
+      }
+    }
+
+    //
+    // array_long_binary_value_traits
+    //
+
+    template <typename C, std::size_t N>
+    void array_long_binary_value_traits<C, N>::
+    param_callback (const void* context,
+                    std::size_t*,
+                    const void** buffer,
+                    std::size_t* size,
+                    chunk_type* chunk,
+                    void*,
+                    std::size_t)
+    {
+      *buffer = context;
+      *size = N;
+      *chunk = chunk_one;
+    }
+
+    template <typename C, std::size_t N>
+    void array_long_binary_value_traits<C, N>::
+    result_callback (void* context,
+                     std::size_t*,
+                     void** buffer,
+                     std::size_t* size,
+                     chunk_type chunk,
+                     std::size_t size_left,
+                     void* tmp_buf,
+                     std::size_t tmp_capacity)
+    {
+      // The code is similar to the vector<char> specialization.
+      //
+      switch (chunk)
+      {
+      case chunk_null:
+      case chunk_one:
+        {
+          std::memset (context, 0, N);
+          break;
+        }
+      case chunk_first:
+        {
+          assert (size_left != 0);
+
+          *buffer = context;
+          *size = size_left < N ? size_left : N;
+          break;
+        }
+      case chunk_next:
+        {
+          // We can get here if total size is greater than N. There is
+          // no way to stop until we read all the data, so dump the
+          // remainder into the temporary buffer.
+          //
+          *buffer = tmp_buf;
+          *size = tmp_capacity;
+          break;
+        }
+      case chunk_last:
+        {
+          break;
+        }
+      }
+    }
   }
 }
-- 
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