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authorBoris Kolpackov <boris@codesynthesis.com>2011-03-25 13:09:06 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2011-03-25 13:09:06 +0200
commit534c5958af6104aea60a9fcb0d823a5c3cfed1bc (patch)
treec2488c68b31a3b72526a7db017d4997cdb93f91f /mapping/traits-sqlite.hxx
parent0bea9feb8e97b0257b801f34322db72a01373468 (diff)
SQLite support
Diffstat (limited to 'mapping/traits-sqlite.hxx')
-rw-r--r--mapping/traits-sqlite.hxx127
1 files changed, 127 insertions, 0 deletions
diff --git a/mapping/traits-sqlite.hxx b/mapping/traits-sqlite.hxx
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+// file : mapping/traits-sqlite.hxx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#ifndef TRAITS_SQLITE_HXX
+#define TRAITS_SQLITE_HXX
+
+//
+// SQLite implementation.
+//
+
+#include <cstring>
+#include <sstream>
+
+#include <odb/sqlite/traits.hxx>
+
+#include "person.hxx" // date
+
+namespace odb
+{
+ namespace sqlite
+ {
+ template <>
+ class value_traits<bool, details::buffer, id_text>
+ {
+ public:
+ typedef bool value_type;
+ typedef bool query_type;
+ typedef details::buffer image_type;
+
+ static void
+ set_value (bool& v,
+ const details::buffer& b,
+ std::size_t n,
+ bool is_null)
+ {
+ v = (!is_null && n == 4 && std::strncmp ("true", b.data (), n) == 0);
+ }
+
+ static void
+ set_image (details::buffer& b,
+ std::size_t& n,
+ bool& is_null,
+ bool v)
+ {
+ is_null = false;
+ n = v ? 4 : 5;
+
+ if (n > b.capacity ())
+ b.capacity (n);
+
+ std::memcpy (b.data (), (v ? "true" : "false"), n);
+ }
+ };
+
+ // In SQLite there is no built-in DATE type. Rather, this type is
+ // mapped to TEXT in the YYYY-MM-DD format. The below implementation
+ // doesn't do any error checking for brevity.
+ //
+ template <>
+ class value_traits<date, details::buffer, id_text>
+ {
+ public:
+ typedef date value_type;
+ typedef date query_type;
+ typedef details::buffer image_type;
+
+ static void
+ set_value (date& v,
+ const details::buffer& b,
+ std::size_t n,
+ bool is_null)
+ {
+ using namespace std;
+
+ if (!is_null)
+ {
+ istringstream is (string (b.data (), n));
+ unsigned int y, m, d;
+
+ is >> y;
+ is.ignore (1);
+ is >> m;
+ is.ignore (1);
+ is >> d;
+
+ v = date (y, m, d);
+ }
+ else
+ v = date (0, 0, 0);
+ }
+
+ static void
+ set_image (details::buffer& b,
+ std::size_t& n,
+ bool& is_null,
+ const date& v)
+ {
+ using namespace std;
+
+ ostringstream os;
+ os.fill ('0');
+
+ os.width (4);
+ os << v.year () << '-';
+
+ os.width (2);
+ os << v.month () << '-';
+
+ os.width (2);
+ os << v.day ();
+
+ const string& s (os.str ());
+
+ is_null = false;
+ n = s.size ();
+
+ if (n > b.capacity ())
+ b.capacity (n);
+
+ memcpy (b.data (), s.c_str (), n);
+ }
+ };
+ }
+}
+
+#endif // TRAITS_SQLITE_HXX