From a849d159fd03d3c954df3fc60826680f5d1afd65 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 24 Jan 2013 15:10:21 +0200
Subject: Add support for mapping char[N] to CHAR/VARCHAR database types

Also improve query support for arrays (decaying).
---
 odb/sqlite/traits.cxx | 101 ++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 94 insertions(+), 7 deletions(-)

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

diff --git a/odb/sqlite/traits.cxx b/odb/sqlite/traits.cxx
index 3f9c5cb..753c181 100644
--- a/odb/sqlite/traits.cxx
+++ b/odb/sqlite/traits.cxx
@@ -15,7 +15,6 @@ namespace odb
     //
     // default_value_traits<std::string>
     //
-
     void default_value_traits<string, id_text>::
     set_image (buffer& b, size_t& n, bool& is_null, const string& v)
     {
@@ -32,7 +31,6 @@ namespace odb
     //
     // c_string_value_traits
     //
-
     void c_string_value_traits::
     set_image (buffer& b, size_t& n, bool& is_null, const char* v)
     {
@@ -46,11 +44,55 @@ namespace odb
         memcpy (b.data (), v, n);
     }
 
-#ifdef _WIN32
     //
-    // default_value_traits<std::wstring>
+    // c_array_value_traits_base
     //
+    void c_array_value_traits_base::
+    set_value (char* const& v,
+               const details::buffer& b,
+               size_t n,
+               bool is_null,
+               size_t N)
+    {
+      if (!is_null)
+      {
+        n = n < N ? n : N;
+
+        if (n != 0)
+          memcpy (v, b.data (), n);
+      }
+      else
+        n = 0;
+
+      if (n != N) // Append '\0' if there is space.
+        v[n] = '\0';
+    }
 
+    void c_array_value_traits_base::
+    set_image (details::buffer& b,
+               size_t& n,
+               bool& is_null,
+               const char* v,
+               size_t N)
+    {
+      is_null = false;
+
+      // Figure out the length. We cannot use strlen since it may
+      // not be 0-terminated (strnlen is not standard).
+      //
+      for (n = 0; n != N && v[n] != '\0'; ++n);
+
+      if (n > b.capacity ())
+        b.capacity (n);
+
+      if (n != 0)
+        memcpy (b.data (), v, n);
+    }
+
+    //
+    // default_value_traits<std::wstring>
+    //
+#ifdef _WIN32
     void default_value_traits<wstring, id_text>::
     set_image (buffer& b, size_t& n, bool& is_null, const wstring& v)
     {
@@ -67,7 +109,6 @@ namespace odb
     //
     // c_wstring_value_traits
     //
-
     void c_wstring_value_traits::
     set_image (buffer& b, size_t& n, bool& is_null, const wchar_t* v)
     {
@@ -80,12 +121,59 @@ namespace odb
       if (n != 0)
         memcpy (b.data (), v, n);
     }
+
+    //
+    // c_warray_value_traits_base
+    //
+    void c_warray_value_traits_base::
+    set_value (wchar_t* const& v,
+               const details::buffer& b,
+               size_t n,
+               bool is_null,
+               size_t N)
+    {
+      if (!is_null)
+      {
+        n /= 2;
+        n = n < N ? n : N;
+
+        if (n != 0)
+          memcpy (v, b.data (), n * sizeof (wchar_t));
+      }
+      else
+        n = 0;
+
+      if (n != N) // Append '\0' if there is space.
+        v[n] = L'\0';
+    }
+
+    void c_warray_value_traits_base::
+    set_image (details::buffer& b,
+               size_t& n,
+               bool& is_null,
+               const wchar_t* v,
+               size_t N)
+    {
+      is_null = false;
+
+      // Figure out the length. We cannot use wcslen since it may
+      // not be 0-terminated (wcsnlen is not standard).
+      //
+      for (n = 0; n != N && v[n] != L'\0'; ++n);
+
+      n *= 2;
+
+      if (n > b.capacity ())
+        b.capacity (n);
+
+      if (n != 0)
+        memcpy (b.data (), v, n);
+    }
 #endif // _WIN32
 
     //
     // default_value_traits<vector<char>, id_blob>
     //
-
     void default_value_traits<vector<char>, id_blob>::
     set_image (details::buffer& b,
                size_t& n,
@@ -107,7 +195,6 @@ namespace odb
     //
     // default_value_traits<vector<unsigned char>, id_blob>
     //
-
     void default_value_traits<vector<unsigned char>, id_blob>::
     set_image (details::buffer& b,
                size_t& n,
-- 
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