diff options
| -rw-r--r-- | odb/sqlite/traits.hxx | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/odb/sqlite/traits.hxx b/odb/sqlite/traits.hxx index ecd982f..65883b6 100644 --- a/odb/sqlite/traits.hxx +++ b/odb/sqlite/traits.hxx @@ -9,6 +9,7 @@ #include <string> #include <vector> +#include <limits> // std::numeric_limits #include <cstddef> // std::size_t #include <cstring> // std::memcpy, std::memset, std::strlen @@ -202,6 +203,45 @@ namespace odb } }; + // Float & double specialization. SQLite converts NaNs to NULLs so + // we convert NULLs to NaNs for consistency. + // + template <typename T> + struct real_value_traits + { + typedef T value_type; + typedef T query_type; + typedef double image_type; + + static void + set_value (T& v, double i, bool is_null) + { + if (!is_null) + v = T (i); + else + v = std::numeric_limits<T>::quiet_NaN (); + } + + static void + set_image (double& i, bool& is_null, T v) + { + is_null = false; + i = image_type (v); + } + }; + + template <> + struct LIBODB_SQLITE_EXPORT default_value_traits<float, id_real>: + real_value_traits<float> + { + }; + + template <> + struct LIBODB_SQLITE_EXPORT default_value_traits<double, id_real>: + real_value_traits<double> + { + }; + // std::string specialization. // template <> |