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Diffstat (limited to 'odb/mssql/traits.hxx')
| -rw-r--r-- | odb/mssql/traits.hxx | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/odb/mssql/traits.hxx b/odb/mssql/traits.hxx new file mode 100644 index 0000000..28188cb --- /dev/null +++ b/odb/mssql/traits.hxx @@ -0,0 +1,498 @@ +// file : odb/mssql/traits.hxx +// author : Constantin Michael <constantin@codesynthesis.com> +// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC +// license : ODB NCUEL; see accompanying LICENSE file + +#ifndef ODB_MSSQL_TRAITS_HXX +#define ODB_MSSQL_TRAITS_HXX + +#include <odb/pre.hxx> + +#include <string> +#include <vector> +#include <cstddef> // std::size_t +//@@ #include <cstring> // std::memcpy, std::memset, std::strlen +//@@ #include <cassert> + +#include <odb/traits.hxx> +#include <odb/wrapper-traits.hxx> + +#include <odb/mssql/version.hxx> +#include <odb/mssql/mssql-types.hxx> + +#include <odb/details/buffer.hxx> +#include <odb/details/wrapper-p.hxx> + +#include <odb/mssql/details/export.hxx> + +namespace odb +{ + namespace mssql + { + enum database_type_id + { + id_bit, + id_tinyint, + id_smallint, + id_int, + id_bigint, + + id_decimal, // DECIMAL; NUMERIC + + id_smallmoney, + id_money, + + id_float4, // REAL; FLOAT(n) with n <= 24 + id_float8, // FLOAT(n) with n > 24 + + id_string, // CHAR(n), VARCHAR(n) with n <= N + id_long_string, // CHAR(n), VARCHAR(n) with n > N; TEXT + + id_nstring, // NCHAR(n), NVARCHAR(n) with 2*n <= N + id_long_nstring, // NCHAR(n), NVARCHAR(n) with 2*n > N; NTEXT + + id_binary, // BINARY(n), VARBINARY(n) with n <= N + id_long_binary, // BINARY(n), VARBINARY(n) with n > N; IMAGE + + id_date, // DATE + id_time, // TIME + id_datetime, // DATETIME; DATETIME2; SMALLDATETIME + id_datetimeoffset, // DATETIMEOFFSET + + id_uuid, // UNIQUEIDENTIFIER + id_rowversion // ROWVERSION; TIMESTAMP + }; + + // + // image_traits + // + + template <database_type_id> + struct image_traits; + + template <> + struct image_traits<id_bit> {typedef unsigned char image_type;}; + + template <> + struct image_traits<id_tinyint> {typedef unsigned char image_type;}; + + template <> + struct image_traits<id_smallint> {typedef short image_type;}; + + template <> + struct image_traits<id_int> {typedef int image_type;}; + + template <> + struct image_traits<id_bigint> {typedef long long image_type;}; + + template <> + struct image_traits<id_decimal> {typedef decimal image_type;}; + + template <> + struct image_traits<id_smallmoney> {typedef smallmoney image_type;}; + + template <> + struct image_traits<id_money> {typedef money image_type;}; + + template <> + struct image_traits<id_float4> {typedef float image_type;}; + + template <> + struct image_traits<id_float8> {typedef double image_type;}; + + template <> + struct image_traits<id_string> {typedef char* image_type;}; + + template <> + struct image_traits<id_long_string> {typedef long_callback image_type;}; + + template <> + struct image_traits<id_nstring> {typedef ucs2_char* image_type;}; + + template <> + struct image_traits<id_long_nstring> {typedef long_callback image_type;}; + + template <> + struct image_traits<id_binary> {typedef char* image_type;}; + + template <> + struct image_traits<id_long_binary> {typedef long_callback image_type;}; + + template <> + struct image_traits<id_date> {typedef date image_type;}; + + template <> + struct image_traits<id_time> {typedef time image_type;}; + + template <> + struct image_traits<id_datetime> {typedef datetime image_type;}; + + template <> + struct image_traits<id_datetimeoffset> {typedef datetimeoffset image_type;}; + + // Image is a 16-byte sequence. + // + template <> + struct image_traits<id_uuid> {typedef unsigned char* image_type;}; + + // Image is an 8-byte sequence. + // + template <> + struct image_traits<id_rowversion> {typedef unsigned char* image_type;}; + + // + // value_traits + // + + template <typename W, database_type_id, bool null_handler> + struct wrapped_value_traits; + + template <typename T, database_type_id> + struct default_value_traits; + + template <typename T, database_type_id, bool w = details::wrapper_p<T>::r> + struct select_traits; + + template <typename T, database_type_id ID> + struct select_traits<T, ID, false> + { + typedef default_value_traits<T, ID> type; + }; + + template <typename W, database_type_id ID> + struct select_traits<W, ID, true> + { + typedef + wrapped_value_traits<W, ID, wrapper_traits<W>::null_handler> + type; + }; + + template <typename T, database_type_id ID> + class value_traits: public select_traits<T, ID>::type + { + }; + + // The wrapped_value_traits specializations should be able to handle + // any value type which means we have to have every possible signature + // of the set_value() and set_image() functions. + // + template <typename W, database_type_id ID> + struct wrapped_value_traits<W, ID, false> + { + typedef wrapper_traits<W> wtraits; + typedef typename wtraits::unrestricted_wrapped_type wrapped_type; + + typedef W value_type; + typedef wrapped_type query_type; + typedef typename image_traits<ID>::image_type image_type; + + typedef value_traits<wrapped_type, ID> vtraits; + + static void + set_value (W& v, const image_type& i, bool is_null) + { + vtraits::set_value (wtraits::set_ref (v), i, is_null); + } + + static void + set_image (image_type& i, bool& is_null, const W& v) + { + vtraits::set_image (i, is_null, wtraits::get_ref (v)); + } + + /* + @@ TODO + + // big_int, big_float, string, nstring, raw. + // + static void + set_value (W& v, const char* i, std::size_t n, bool is_null) + { + vtraits::set_value (wtraits::set_ref (v), i, n, is_null); + } + + // string, nstring, raw. + // + static void + set_image (char* i, + std::size_t c, + std::size_t& n, + bool& is_null, + const W& v) + { + vtraits::set_image (i, c, n, is_null, wtraits::get_ref (v)); + } + + // big_int, big_float. + // + static void + set_image (char* i, std::size_t& n, bool& is_null, const W& v) + { + vtraits::set_image (i, n, is_null, wtraits::get_ref (v)); + } + + // blob, clob, nclob. + // + static void + set_value (W& v, result_callback_type& cb, void*& context, bool is_null) + { + vtraits::set_value (wtraits::set_ref (v), cb, context, is_null); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const W& v) + { + vtraits::set_image (cb, context, is_null, wtraits::get_ref (v)); + } + */ + }; + + template <typename W, database_type_id ID> + struct wrapped_value_traits<W, ID, true> + { + typedef wrapper_traits<W> wtraits; + typedef typename wtraits::unrestricted_wrapped_type wrapped_type; + + typedef W value_type; + typedef wrapped_type query_type; + typedef typename image_traits<ID>::image_type image_type; + + typedef value_traits<wrapped_type, ID> vtraits; + + static void + set_value (W& v, const image_type& i, bool is_null) + { + if (is_null) + wtraits::set_null (v); + else + vtraits::set_value (wtraits::set_ref (v), i, is_null); + } + + static void + set_image (image_type& i, bool& is_null, const W& v) + { + is_null = wtraits::get_null (v); + + if (!is_null) + vtraits::set_image (i, is_null, wtraits::get_ref (v)); + } + + /* + @@ TODO + + // big_int, big_float, string, nstring, raw. + // + static void + set_value (W& v, const char* i, std::size_t n, bool is_null) + { + if (is_null) + wtraits::set_null (v); + else + vtraits::set_value (wtraits::set_ref (v), i, n, is_null); + } + + // string, nstring, raw. + // + static void + set_image (char* i, + std::size_t c, + std::size_t& n, + bool& is_null, + const W& v) + { + is_null = wtraits::get_null (v); + + if (!is_null) + vtraits::set_image (i, c, n, is_null, wtraits::get_ref (v)); + } + + // big_int, big_float + // + static void + set_image (char* i, std::size_t& n, bool& is_null, const W& v) + { + is_null = wtraits::get_null (v); + + if (!is_null) + vtraits::set_image (i, n, is_null, wtraits::get_ref (v)); + } + + // blob, clob, nclob. + // + static void + set_value (W& v, result_callback_type& cb, void*& context, bool is_null) + { + if (is_null) + wtraits::set_null (v); + else + vtraits::set_value (wtraits::set_ref (v), cb, context, is_null); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const W& v) + { + is_null = wtraits::get_null (v); + + if (!is_null) + vtraits::set_image (cb, context, is_null, wtraits::get_ref (v)); + } + */ + }; + + template <typename T, database_type_id ID> + struct default_value_traits + { + typedef T value_type; + typedef T query_type; + typedef typename image_traits<ID>::image_type image_type; + + static void + set_value (T& v, const image_type& i, bool is_null) + { + if (!is_null) + v = T (i); + else + v = T (); + } + + static void + set_image (image_type& i, bool& is_null, T v) + { + is_null = false; + i = image_type (v); + } + }; + + // + // type_traits + // + + template <typename T> + struct default_type_traits; + + template <typename T> + class type_traits: public default_type_traits<T> + { + }; + + // Integral types. + // + template <> + struct default_type_traits<bool> + { + static const database_type_id db_type_id = id_bit; + }; + + template <> + struct default_type_traits<signed char> + { + static const database_type_id db_type_id = id_tinyint; + }; + + template <> + struct default_type_traits<unsigned char> + { + static const database_type_id db_type_id = id_tinyint; + }; + + template <> + struct default_type_traits<short> + { + static const database_type_id db_type_id = id_smallint; + }; + + template <> + struct default_type_traits<unsigned short> + { + static const database_type_id db_type_id = id_smallint; + }; + + template <> + struct default_type_traits<int> + { + static const database_type_id db_type_id = id_int; + }; + + template <> + struct default_type_traits<unsigned int> + { + static const database_type_id db_type_id = id_int; + }; + + template <> + struct default_type_traits<long> + { + static const database_type_id db_type_id = id_bigint; + }; + + template <> + struct default_type_traits<unsigned long> + { + static const database_type_id db_type_id = id_bigint; + }; + + template <> + struct default_type_traits<long long> + { + static const database_type_id db_type_id = id_bigint; + }; + + template <> + struct default_type_traits<unsigned long long> + { + static const database_type_id db_type_id = id_bigint; + }; + + // Float types. + // + template <> + struct default_type_traits<float> + { + static const database_type_id db_type_id = id_float4; + }; + + template <> + struct default_type_traits<double> + { + static const database_type_id db_type_id = id_float8; + }; + + // String type. + // + template <> + struct default_type_traits<std::string> + { + static const database_type_id db_type_id = id_long_string; + }; + + template <> + struct default_type_traits<const char*> + { + static const database_type_id db_type_id = id_long_string; + }; + + template <std::size_t n> + struct default_type_traits<char[n]> + { + static const database_type_id db_type_id = id_long_string; + }; + + template <std::size_t n> + struct default_type_traits<const char[n]> + { + static const database_type_id db_type_id = id_long_string; + }; + } +} + +#include <odb/mssql/traits.txx> + +#include <odb/post.hxx> + +#endif // ODB_MSSQL_TRAITS_HXX |