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Diffstat (limited to 'libodb-mssql/odb/mssql/traits.hxx')
| -rw-r--r-- | libodb-mssql/odb/mssql/traits.hxx | 2176 |
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diff --git a/libodb-mssql/odb/mssql/traits.hxx b/libodb-mssql/odb/mssql/traits.hxx new file mode 100644 index 0000000..f53e535 --- /dev/null +++ b/libodb-mssql/odb/mssql/traits.hxx @@ -0,0 +1,2176 @@ +// file : odb/mssql/traits.hxx +// license : ODB NCUEL; see accompanying LICENSE file + +#ifndef ODB_MSSQL_TRAITS_HXX +#define ODB_MSSQL_TRAITS_HXX + +#include <odb/pre.hxx> + +#include <odb/details/config.hxx> // ODB_CXX11 + +#include <string> +#include <vector> +#include <cstddef> // std::size_t +#include <cstring> // std::memcpy, std::memset, std::strlen +#include <cwchar> // std::wcslen + +#ifdef ODB_CXX11 +# include <array> +#endif + +#ifdef _WIN32 +typedef struct _GUID GUID; +#endif + +#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_uniqueidentifier, // 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; + }; + + template <> + struct image_traits<id_uniqueidentifier> + { + typedef uniqueidentifier 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)); + } + + // string, binary. + // + 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); + } + + 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)); + } + + // nstring. + // + static void + set_value (W& v, const ucs2_char* i, std::size_t n, bool is_null) + { + vtraits::set_value (wtraits::set_ref (v), i, n, is_null); + } + + static void + set_image (ucs2_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)); + } + + // long_string, long_nstring, long_binary. + // + static void + set_value (W& v, result_callback_type& cb, void*& context) + { + vtraits::set_value (wtraits::set_ref (v), cb, context); + } + + 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)); + } + + // time, datetime, datetimeoffset. + // + static void + set_image (image_type& i, unsigned short s, bool& is_null, const W& v) + { + vtraits::set_image (i, s, 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)); + } + + // string, binary. + // + 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); + } + + 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)); + } + + // nstring. + // + static void + set_value (W& v, const ucs2_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); + } + + static void + set_image (ucs2_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)); + } + + // long_string, long_nstring, long_binary. + // + static void + set_value (W& v, result_callback_type& cb, void*& context) + { + // We have to use our own callback since the NULL information + // is only available during streaming. + // + cb = &result_callback; + context = &v; + } + + 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)); + } + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + + // time, datetime, datetimeoffset. + // + static void + set_image (image_type& i, unsigned short s, bool& is_null, const W& v) + { + is_null = wtraits::get_null (v); + + if (!is_null) + vtraits::set_image (i, s, 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); + } + }; + + // smallmoney as float/double. + // + template <typename T> + struct smallmoney_float_value_traits + { + typedef T value_type; + typedef T query_type; + typedef smallmoney image_type; + + static void + set_value (T& v, const smallmoney& i, bool is_null) + { + if (!is_null) + v = T (i.value / 10000) + T (i.value % 10000) / 10000; + else + v = T (); + } + + static void + set_image (smallmoney& i, bool& is_null, T v) + { + is_null = false; + i.value = static_cast<int> (v) * 10000 + + static_cast<int> (v * 10000) % 10000; + } + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<float, id_smallmoney>: + smallmoney_float_value_traits<float> + { + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<double, id_smallmoney>: + smallmoney_float_value_traits<double> + { + }; + + // smallmoney as integer. + // + template <typename T> + struct default_value_traits<T, id_smallmoney> + { + typedef T value_type; + typedef T query_type; + typedef smallmoney image_type; + + static void + set_value (T& v, const smallmoney& i, bool is_null) + { + if (!is_null) + v = static_cast<T> (i.value); + else + v = T (); + } + + static void + set_image (smallmoney& i, bool& is_null, T v) + { + is_null = false; + i.value = static_cast<int> (v); + } + }; + + // money as float/double. + // + template <typename T> + struct money_float_value_traits + { + typedef T value_type; + typedef T query_type; + typedef money image_type; + + static void + set_value (T& v, const money& i, bool is_null) + { + if (!is_null) + { + long long iv ((static_cast<long long> (i.high) << 32) | i.low); + v = T (iv / 10000) + T (iv % 10000) / 10000; + } + else + v = T (); + } + + static void + set_image (money& i, bool& is_null, T v) + { + is_null = false; + long long iv (static_cast<long long> (v) * 10000 + + static_cast<long long> (v * 10000) % 10000); + i.high = static_cast<int> (iv >> 32); + i.low = static_cast<unsigned int> (iv); + } + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<float, id_money>: + money_float_value_traits<float> + { + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<double, id_money>: + money_float_value_traits<double> + { + }; + + // money as integer. + // + template <typename T> + struct default_value_traits<T, id_money> + { + typedef T value_type; + typedef T query_type; + typedef money image_type; + + static void + set_value (T& v, const money& i, bool is_null) + { + if (!is_null) + { + long long iv ((static_cast<long long> (i.high) << 32) | i.low); + v = static_cast<T> (iv); + } + else + v = T (); + } + + static void + set_image (money& i, bool& is_null, T v) + { + is_null = false; + long long iv (static_cast<long long> (v)); + i.high = static_cast<int> (iv >> 32); + i.low = static_cast<unsigned int> (iv); + } + }; + + // std::string specialization for string. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::string, id_string> + { + typedef std::string value_type; + typedef std::string query_type; + typedef char* image_type; + + static void + set_value (std::string& v, + const char* b, + std::size_t n, + bool is_null) + { + if (!is_null) + v.assign (b, n); + else + v.erase (); + } + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const std::string& v) + { + is_null = false; + n = v.size (); + + if (n > c) + n = c; + + if (n != 0) + std::memcpy (b, v.c_str (), n); + } + }; + + // char*/const char* specialization for string. + // + // Specialization for const char* which only supports initialization + // of an image from the value but not the other way around. This way + // we can pass such values to the queries. + // + class LIBODB_MSSQL_EXPORT c_string_value_traits + { + public: + typedef const char* value_type; + typedef char* image_type; + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const char* v) + { + is_null = false; + n = std::strlen (v); + + if (n > c) + n = c; + + if (n != 0) + std::memcpy (b, v, n); + } + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<char*, id_string>: + c_string_value_traits {}; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<const char*, id_string>: + c_string_value_traits {}; + + // char[N] specialization. + // + struct LIBODB_MSSQL_EXPORT c_array_value_traits_base + { + static void + set_value (char* const& v, + const char* b, + std::size_t n, + bool is_null, + std::size_t N); + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const char* v, + std::size_t N); + }; + + template <std::size_t N> + struct default_value_traits<char[N], id_string> + { + typedef char* value_type; + typedef char query_type[N]; + typedef details::buffer image_type; + + static void + set_value (char* const& v, + const char* b, + std::size_t n, + bool is_null) + { + c_array_value_traits_base::set_value (v, b, n, is_null, N); + } + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const char* v) + { + c_array_value_traits_base::set_image (b, c, n, is_null, v, N); + } + }; + + // std::array<char, N> (string) specialization. + // +#ifdef ODB_CXX11 + template <std::size_t N> + struct default_value_traits<std::array<char, N>, id_string> + { + typedef std::array<char, N> value_type; + typedef std::array<char, N> query_type; + typedef details::buffer image_type; + + static void + set_value (value_type& v, + const char* b, + std::size_t n, + bool is_null) + { + c_array_value_traits_base::set_value (v.data (), b, n, is_null, N); + } + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const value_type& v) + { + c_array_value_traits_base::set_image (b, c, n, is_null, v.data (), N); + } + }; +#endif + + // char specialization. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<char, id_string> + { + typedef char value_type; + typedef char query_type; + typedef details::buffer image_type; + + static void + set_value (char& v, + const char* b, + std::size_t n, + bool is_null) + { + c_array_value_traits_base::set_value (&v, b, n, is_null, 1); + } + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + char v) + { + c_array_value_traits_base::set_image (b, c, n, is_null, &v, 1); + } + }; + + // std::string specialization for long_string. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::string, + id_long_string> + { + typedef std::string value_type; + typedef std::string query_type; + typedef long_callback image_type; + + static void + set_value (std::string& v, + result_callback_type& cb, + void*& context) + { + cb = &result_callback; + context = &v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const std::string& v) + { + is_null = false; + cb = ¶m_callback; + context = &v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + + // char*/const char* specialization for long_string. + // + class LIBODB_MSSQL_EXPORT c_string_long_value_traits + { + public: + typedef const char* value_type; + typedef long_callback image_type; + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const char* v) + { + is_null = false; + cb = ¶m_callback; + context = v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits< + char*, id_long_string>: c_string_long_value_traits {}; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits< + const char*, id_long_string>: c_string_long_value_traits {}; + + // char[N] specialization for long_string. + // + template <std::size_t N> + struct c_array_long_value_traits_base + { + static void + set_value (char* const& v, + result_callback_type& cb, + void*& context) + { + cb = &result_callback; + context = v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const char* v) + { + is_null = false; + cb = ¶m_callback; + context = v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + + template <std::size_t N> + struct default_value_traits<char[N], id_long_string> + { + typedef char* value_type; + typedef char query_type[N]; + typedef long_callback image_type; + + static void + set_value (char* const& v, + result_callback_type& cb, + void*& context) + { + c_array_long_value_traits_base<N>::set_value (v, cb, context); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const char* v) + { + c_array_long_value_traits_base<N>::set_image (cb, context, is_null, v); + } + }; + + // std::array<char, N> (long_string) specialization. + // +#ifdef ODB_CXX11 + template <std::size_t N> + struct default_value_traits<std::array<char, N>, id_long_string> + { + typedef std::array<char, N> value_type; + typedef std::array<char, N> query_type; + typedef long_callback image_type; + + static void + set_value (value_type& v, + result_callback_type& cb, + void*& context) + { + c_array_long_value_traits_base<N>::set_value (v.data (), cb, context); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const value_type& v) + { + c_array_long_value_traits_base<N>::set_image ( + cb, context, is_null, v.data ()); + } + }; +#endif + + // std::wstring specialization for nstring. + // + template <std::size_t = sizeof (wchar_t)> + struct wstring_functions + { + static void + assign (std::wstring& s, const ucs2_char* b, std::size_t n) + { + s.assign (b, b + n); + } + + static void + assign (ucs2_char* b, const wchar_t* s, std::size_t n) + { + for (std::size_t i (0); i < n; ++i) + b[i] = static_cast<ucs2_char> (s[i]); + } + + // Even though this is not used when ucs2_char == wchar_t, the + // compiler will still compile the signatures and complain. + // +#ifndef _WIN32 + static void + assign (wchar_t* s, const ucs2_char* b, std::size_t n) + { + for (std::size_t i (0); i < n; ++i) + s[i] = static_cast<wchar_t> (b[i]); + } +#endif + }; + + template <> + struct LIBODB_MSSQL_EXPORT wstring_functions<sizeof (ucs2_char)> + { + static void + assign (std::wstring& s, const ucs2_char* b, std::size_t n) + { + s.assign (reinterpret_cast<const wchar_t*> (b), n); + } + + static void + assign (ucs2_char* b, const wchar_t* s, std::size_t n) + { + std::memcpy (b, s, n * sizeof (ucs2_char)); + } + + // On Windows ucs2_char is wchar_t which makes this function + // the same as the one above. + // +#ifndef _WIN32 + static void + assign (wchar_t* s, const ucs2_char* b, std::size_t n) + { + std::memcpy (s, b, n * sizeof (ucs2_char)); + } +#endif + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::wstring, id_nstring> + { + typedef std::wstring value_type; + typedef std::wstring query_type; + typedef ucs2_char* image_type; + + typedef wstring_functions<> functions; + + static void + set_value (std::wstring& v, + const ucs2_char* b, + std::size_t n, + bool is_null) + { + if (!is_null) + functions::assign (v, b, n); + else + v.erase (); + } + + static void + set_image (ucs2_char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const std::wstring& v) + { + is_null = false; + n = v.size (); + + if (n > c) + n = c; + + if (n != 0) + functions::assign (b, v.c_str (), n); + } + }; + + // wchar_t*/const wchar_t* specialization for nstring. + // + class LIBODB_MSSQL_EXPORT c_wstring_value_traits + { + public: + typedef const wchar_t* value_type; + typedef ucs2_char* image_type; + + typedef wstring_functions<> functions; + + static void + set_image (ucs2_char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const wchar_t* v) + { + is_null = false; + n = std::wcslen (v); + + if (n > c) + n = c; + + if (n != 0) + functions::assign (b, v, n); + } + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<wchar_t*, id_nstring>: + c_wstring_value_traits {}; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits< + const wchar_t*, id_nstring>: c_wstring_value_traits {}; + + // wchar_t[N] specialization. + // + struct LIBODB_MSSQL_EXPORT c_warray_value_traits_base + { + typedef wstring_functions<> functions; + + static void + set_value (wchar_t* const& v, + const ucs2_char* b, + std::size_t n, + bool is_null, + std::size_t N); + + static void + set_image (ucs2_char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const wchar_t* v, + std::size_t N); + }; + + template <std::size_t N> + struct default_value_traits<wchar_t[N], id_nstring> + { + typedef wchar_t* value_type; + typedef wchar_t query_type[N]; + typedef details::buffer image_type; + + static void + set_value (wchar_t* const& v, + const ucs2_char* b, + std::size_t n, + bool is_null) + { + c_warray_value_traits_base::set_value (v, b, n, is_null, N); + } + + static void + set_image (ucs2_char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const wchar_t* v) + { + c_warray_value_traits_base::set_image (b, c, n, is_null, v, N); + } + }; + + // std::array<wchar_t, N> (string) specialization. + // +#ifdef ODB_CXX11 + template <std::size_t N> + struct default_value_traits<std::array<wchar_t, N>, id_nstring> + { + typedef std::array<wchar_t, N> value_type; + typedef std::array<wchar_t, N> query_type; + typedef details::buffer image_type; + + static void + set_value (value_type& v, + const ucs2_char* b, + std::size_t n, + bool is_null) + { + c_warray_value_traits_base::set_value (v.data (), b, n, is_null, N); + } + + static void + set_image (ucs2_char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const value_type& v) + { + c_warray_value_traits_base::set_image (b, c, n, is_null, v.data (), N); + } + }; +#endif + + // wchar_t specialization. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<wchar_t, id_nstring> + { + typedef wchar_t value_type; + typedef wchar_t query_type; + typedef details::buffer image_type; + + static void + set_value (wchar_t& v, + const ucs2_char* b, + std::size_t n, + bool is_null) + { + c_warray_value_traits_base::set_value (&v, b, n, is_null, 1); + } + + static void + set_image (ucs2_char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + wchar_t v) + { + c_warray_value_traits_base::set_image (b, c, n, is_null, &v, 1); + } + }; + + // std::wstring specialization for long_nstring. + // + template <std::size_t = sizeof (wchar_t)> + struct wstring_long_value_traits; + + template <> + struct LIBODB_MSSQL_EXPORT wstring_long_value_traits<2> + { + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + +#ifndef _WIN32 + template <> + struct LIBODB_MSSQL_EXPORT wstring_long_value_traits<4> + { + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; +#endif + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::wstring, + id_long_nstring> + { + typedef std::wstring value_type; + typedef std::wstring query_type; + typedef long_callback image_type; + + static void + set_value (std::wstring& v, + result_callback_type& cb, + void*& context) + { + cb = &wstring_long_value_traits<>::result_callback; + context = &v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const std::wstring& v) + { + is_null = false; + cb = &wstring_long_value_traits<>::param_callback; + context = &v; + } + }; + + // wchar_t*/const wchar_t* specialization for long_nstring. + // + template <std::size_t = sizeof (wchar_t)> + struct c_wstring_long_value_traits; + + template <> + struct LIBODB_MSSQL_EXPORT c_wstring_long_value_traits<2> + { + typedef const wchar_t* value_type; + typedef long_callback image_type; + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const wchar_t* v) + { + is_null = false; + cb = ¶m_callback; + context = v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + +#ifndef _WIN32 + template <> + struct LIBODB_MSSQL_EXPORT c_wstring_long_value_traits<4> + { + typedef const wchar_t* value_type; + typedef long_callback image_type; + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const wchar_t* v) + { + is_null = false; + cb = ¶m_callback; + context = v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + }; +#endif + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits< + wchar_t*, id_long_nstring>: c_wstring_long_value_traits<> {}; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits< + const wchar_t*, id_long_nstring>: c_wstring_long_value_traits<> {}; + + // char[N] specialization for long_nstring. + // + template <std::size_t N, std::size_t = sizeof (wchar_t)> + struct c_warray_long_value_traits_base; + + template <std::size_t N> + struct c_warray_long_value_traits_base<N, 2> + { + static void + set_value (wchar_t* const& v, + result_callback_type& cb, + void*& context) + { + cb = &result_callback; + context = v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const wchar_t* v) + { + is_null = false; + cb = ¶m_callback; + context = v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + +#ifndef _WIN32 + template <std::size_t N> + struct c_warray_long_value_traits_base<N, 4> + { + static void + set_value (wchar_t* const& v, + result_callback_type& cb, + void*& context) + { + cb = &result_callback; + context = v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const wchar_t* v) + { + is_null = false; + cb = ¶m_callback; + context = v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; +#endif + + template <std::size_t N> + struct default_value_traits<wchar_t[N], id_long_nstring> + { + typedef wchar_t* value_type; + typedef wchar_t query_type[N]; + typedef long_callback image_type; + + static void + set_value (wchar_t* const& v, + result_callback_type& cb, + void*& context) + { + c_warray_long_value_traits_base<N>::set_value (v, cb, context); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const wchar_t* v) + { + c_warray_long_value_traits_base<N>::set_image ( + cb, context, is_null, v); + } + }; + + // std::array<wchar_t, N> (long_nstring) specialization. + // +#ifdef ODB_CXX11 + template <std::size_t N> + struct default_value_traits<std::array<wchar_t, N>, id_long_nstring> + { + typedef std::array<wchar_t, N> value_type; + typedef std::array<wchar_t, N> query_type; + typedef long_callback image_type; + + static void + set_value (value_type& v, + result_callback_type& cb, + void*& context) + { + c_warray_long_value_traits_base<N>::set_value ( + v.data (), cb, context); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const value_type& v) + { + c_warray_long_value_traits_base<N>::set_image ( + cb, context, is_null, v.data ()); + } + }; +#endif + + // std::vector (buffer) specialization for binary. + // + template <typename C> + struct vector_binary_value_traits + { + typedef std::vector<C> value_type; + typedef std::vector<C> query_type; + typedef char* image_type; + + static void + set_value (value_type& v, const char* b, std::size_t n, bool is_null) + { + if (!is_null) + { + const C* cb (reinterpret_cast<const C*> (b)); + v.assign (cb, cb + n); + } + else + v.clear (); + } + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const value_type& v) + { + is_null = false; + n = v.size (); + + if (n > c) + n = c; + + // std::vector::data() may not be available in older compilers. + // + if (n != 0) + std::memcpy (b, &v.front (), n); + } + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::vector<char>, + id_binary>: + vector_binary_value_traits<char> + { + }; + + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::vector<unsigned char>, + id_binary>: + vector_binary_value_traits<unsigned char> + { + }; + + // C array (buffer) specialization for binary. + // + template <typename C, std::size_t N> + struct c_array_binary_value_traits + { + typedef C* value_type; + typedef C query_type[N]; + typedef char* image_type; + + static void + set_value (C* const& v, const char* b, std::size_t n, bool is_null) + { + if (!is_null) + std::memcpy (v, b, n < N ? n : N); + else + std::memset (v, 0, N); + } + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const C* v) + { + is_null = false; + n = c > N ? N : c; + std::memcpy (b, v, n); + } + }; + + template <std::size_t N> + struct default_value_traits<char[N], id_binary>: + c_array_binary_value_traits<char, N> + { + }; + + template <std::size_t N> + struct default_value_traits<unsigned char[N], id_binary>: + c_array_binary_value_traits<unsigned char, N> + { + }; + +#ifdef ODB_CXX11 + // std::array (buffer) specialization for binary. + // + template <typename C, std::size_t N> + struct array_binary_value_traits + { + typedef std::array<C, N> value_type; + typedef value_type query_type; + typedef char* image_type; + + static void + set_value (value_type& v, const char* b, std::size_t n, bool is_null) + { + if (!is_null) + std::memcpy (v.data (), b, n < N ? n : N); + else + std::memset (v.data (), 0, N); + } + + static void + set_image (char* b, + std::size_t c, + std::size_t& n, + bool& is_null, + const value_type& v) + { + is_null = false; + n = c > N ? N : c; + std::memcpy (b, v.data (), n); + } + }; + + template <std::size_t N> + struct default_value_traits<std::array<char, N>, id_binary>: + array_binary_value_traits<char, N> + { + }; + + template <std::size_t N> + struct default_value_traits<std::array<unsigned char, N>, id_binary>: + array_binary_value_traits<unsigned char, N> + { + }; +#endif + + // std::vector<char> (buffer) specialization for long_binary. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::vector<char>, + id_long_binary> + { + typedef std::vector<char> value_type; + typedef std::vector<char> query_type; + typedef long_callback image_type; + + static void + set_value (value_type& v, + result_callback_type& cb, + void*& context) + { + cb = &result_callback; + context = &v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const value_type& v) + { + is_null = false; + cb = ¶m_callback; + context = &v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + + // std::vector<unsigned char> (buffer) specialization for long_binary. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<std::vector<unsigned char>, + id_long_binary> + { + typedef std::vector<unsigned char> value_type; + typedef std::vector<unsigned char> query_type; + typedef long_callback image_type; + + static void + set_value (value_type& v, + result_callback_type& cb, + void*& context) + { + cb = &result_callback; + context = &v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const value_type& v) + { + is_null = false; + cb = ¶m_callback; + context = &v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + + // C array (buffer) specialization for long_binary. + // + template <typename C, std::size_t N> + struct c_array_long_binary_value_traits + { + static void + set_value (C* const& v, + result_callback_type& cb, + void*& context) + { + cb = &result_callback; + context = v; + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const C* v) + { + is_null = false; + cb = ¶m_callback; + context = v; + } + + static void + param_callback (const void* context, + std::size_t* position, + const void** buffer, + std::size_t* size, + chunk_type* chunk, + void* tmp_buffer, + std::size_t tmp_capacity); + + static void + result_callback (void* context, + std::size_t* position, + void** buffer, + std::size_t* size, + chunk_type chunk, + std::size_t size_left, + void* tmp_buffer, + std::size_t tmp_capacity); + }; + + template <std::size_t N> + struct default_value_traits<char[N], id_long_binary>: + c_array_long_binary_value_traits<char, N> + { + typedef char* value_type; + typedef char query_type[N]; + typedef long_callback image_type; + }; + + template <std::size_t N> + struct default_value_traits<unsigned char[N], id_long_binary>: + c_array_long_binary_value_traits<unsigned char, N> + { + typedef unsigned char* value_type; + typedef unsigned char query_type[N]; + typedef long_callback image_type; + }; + +#ifdef ODB_CXX11 + // std::array (buffer) specialization for long_binary. + // + template <std::size_t N> + struct default_value_traits<std::array<char, N>, id_long_binary> + { + typedef std::array<char, N> value_type; + typedef value_type query_type; + typedef long_callback image_type; + + static void + set_value (value_type& v, + result_callback_type& cb, + void*& context) + { + c_array_long_binary_value_traits<char, N>::set_value ( + v.data (), cb, context); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const value_type& v) + { + c_array_long_binary_value_traits<char, N>::set_image ( + cb, context, is_null, v.data ()); + } + }; + + template <std::size_t N> + struct default_value_traits<std::array<unsigned char, N>, id_long_binary> + { + typedef std::array<unsigned char, N> value_type; + typedef value_type query_type; + typedef long_callback image_type; + + static void + set_value (value_type& v, + result_callback_type& cb, + void*& context) + { + c_array_long_binary_value_traits<unsigned char, N>::set_value ( + v.data (), cb, context); + } + + static void + set_image (param_callback_type& cb, + const void*& context, + bool& is_null, + const value_type& v) + { + c_array_long_binary_value_traits<unsigned char, N>::set_image ( + cb, context, is_null, v.data ()); + } + }; +#endif + + // GUID specialization for uniqueidentifier. + // +#ifdef _WIN32 + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<GUID, id_uniqueidentifier> + { + typedef GUID value_type; + typedef GUID query_type; + typedef uniqueidentifier image_type; + + static void + set_value (GUID& v, const uniqueidentifier& i, bool is_null) + { + if (!is_null) + std::memcpy (&v, &i, 16); + else + std::memset (&v, 0, 16); + } + + static void + set_image (uniqueidentifier& i, bool& is_null, const GUID& v) + { + is_null = false; + std::memcpy (&i, &v, 16); + } + }; +#endif + + // char[16] specialization for uniqueidentifier. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<char[16], + id_uniqueidentifier> + { + typedef char* value_type; + typedef char query_type[16]; + typedef uniqueidentifier image_type; + + static void + set_value (char* const& v, const uniqueidentifier& i, bool is_null) + { + if (!is_null) + std::memcpy (v, &i, 16); + else + std::memset (v, 0, 16); + } + + static void + set_image (uniqueidentifier& i, bool& is_null, const char* v) + { + is_null = false; + std::memcpy (&i, v, 16); + } + }; + + // unsigned long long specialization for rowversion. + // + template <> + struct LIBODB_MSSQL_EXPORT default_value_traits<unsigned long long, + id_rowversion> + { + typedef unsigned long long value_type; + typedef unsigned long long query_type; + typedef unsigned char* image_type; + + static void + set_value (unsigned long long& v, const unsigned char* i, bool is_null) + { + if (!is_null) + { + // The value is in the big-endian format. + // + unsigned char* p (reinterpret_cast<unsigned char*> (&v)); + p[0] = i[7]; + p[1] = i[6]; + p[2] = i[5]; + p[3] = i[4]; + p[4] = i[3]; + p[5] = i[2]; + p[6] = i[1]; + p[7] = i[0]; + } + else + v = 0; + } + + static void + set_image (unsigned char* i, bool& is_null, unsigned long long v) + { + is_null = false; + + // The value is in the big-endian format. + // + const unsigned char* p (reinterpret_cast<const unsigned char*> (&v)); + i[0] = p[7]; + i[1] = p[6]; + i[2] = p[5]; + i[3] = p[4]; + i[4] = p[3]; + i[5] = p[2]; + i[6] = p[1]; + i[7] = p[0]; + } + }; + + // + // 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 types. + // + template <> + struct default_type_traits<std::string> + { + static const database_type_id db_type_id = id_long_string; + }; + + template <> + struct default_type_traits<char*> + { + 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]> + { + // Use short string by default to minimize code bloat. Can + // always be overridden with _val()/_ref(). + // + static const database_type_id db_type_id = id_string; + }; + +#ifdef ODB_CXX11 + template <std::size_t N> + struct default_type_traits<std::array<char, N> > + { + // Ditto. + // + static const database_type_id db_type_id = id_string; + }; +#endif + + template <> + struct default_type_traits<char> + { + static const database_type_id db_type_id = id_string; + }; + + // Wide string types. + // + template <> + struct default_type_traits<std::wstring> + { + static const database_type_id db_type_id = id_long_nstring; + }; + + template <> + struct default_type_traits<wchar_t*> + { + static const database_type_id db_type_id = id_long_nstring; + }; + + template <> + struct default_type_traits<const wchar_t*> + { + static const database_type_id db_type_id = id_long_nstring; + }; + + template <std::size_t N> + struct default_type_traits<wchar_t[N]> + { + // Use short string by default to minimize code bloat. Can + // always be overridden with _val()/_ref(). + // + static const database_type_id db_type_id = id_nstring; + }; + +#ifdef ODB_CXX11 + template <std::size_t N> + struct default_type_traits<std::array<wchar_t, N> > + { + // Ditto. + // + static const database_type_id db_type_id = id_nstring; + }; +#endif + + template <> + struct default_type_traits<wchar_t> + { + static const database_type_id db_type_id = id_nstring; + }; + + // Binary types. + // + template <std::size_t N> + struct default_type_traits<unsigned char[N]> + { + static const database_type_id db_type_id = id_long_binary; + }; + + template <> + struct default_type_traits<std::vector<char> > + { + static const database_type_id db_type_id = id_long_binary; + }; + + template <> + struct default_type_traits<std::vector<unsigned char> > + { + static const database_type_id db_type_id = id_long_binary; + }; + +#ifdef ODB_CXX11 + template <std::size_t N> + struct default_type_traits<std::array<unsigned char, N> > + { + static const database_type_id db_type_id = id_long_binary; + }; +#endif + + // GUID. + // +#ifdef _WIN32 + template <> + struct default_type_traits<GUID> + { + static const database_type_id db_type_id = id_uniqueidentifier; + }; +#endif + } +} + +#include <odb/mssql/traits.txx> + +#include <odb/post.hxx> + +#endif // ODB_MSSQL_TRAITS_HXX |