From 37f5dcb1d34205aa4a395c1e21e853e363fd7f12 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 28 Jul 2011 09:45:36 +0200
Subject: Add value_traits specializations for std::vector<char>

This allows using it as a buffer for BLOB mapping.
---
 odb/sqlite/traits.cxx | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'odb/sqlite/traits.cxx')

diff --git a/odb/sqlite/traits.cxx b/odb/sqlite/traits.cxx
index e73462a..96e201d 100644
--- a/odb/sqlite/traits.cxx
+++ b/odb/sqlite/traits.cxx
@@ -15,8 +15,10 @@ namespace odb
   {
     using details::buffer;
 
+    //
     // default_value_traits<std::string>
     //
+
     void default_value_traits<string, id_text>::
     set_image (buffer& b,
                size_t& n,
@@ -33,8 +35,10 @@ namespace odb
         memcpy (b.data (), v.c_str (), n);
     }
 
+    //
     // default_value_traits<const char*>
     //
+
     void default_value_traits<const char*, id_text>::
     set_image (buffer& b,
                size_t& n,
@@ -50,5 +54,27 @@ namespace odb
       if (n != 0)
         memcpy (b.data (), v, n);
     }
+
+    //
+    // default_value_traits<vector<char>, id_blob>
+    //
+
+    void default_value_traits<vector<char>, id_blob>::
+    set_image (details::buffer& b,
+               size_t& n,
+               bool& is_null,
+               const value_type& v)
+    {
+      is_null = false;
+      n = v.size ();
+
+      if (n > b.capacity ())
+        b.capacity (n);
+
+      // std::vector::data() may not be available in older compilers.
+      //
+      if (n != 0)
+        memcpy (b.data (), &v[0], n);
+    }
   }
 }
-- 
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