diff options
author | Karen Arutyunov <karen@codesynthesis.com> | 2024-01-24 19:01:19 +0300 |
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committer | Karen Arutyunov <karen@codesynthesis.com> | 2024-01-24 19:01:19 +0300 |
commit | e5d0186db99492a139237067bab841a5b83463af (patch) | |
tree | 61719595e998314e58383c5081da16d7457a63e7 /odb/sqlite/traits.hxx | |
parent | c53136bd7d266fccaca679d0471dd8ac0ce91373 (diff) |
Turn libodb-sqlite repository into package for muti-package repositorylibodb-sqlite
Diffstat (limited to 'odb/sqlite/traits.hxx')
-rw-r--r-- | odb/sqlite/traits.hxx | 1099 |
1 files changed, 0 insertions, 1099 deletions
diff --git a/odb/sqlite/traits.hxx b/odb/sqlite/traits.hxx deleted file mode 100644 index a8cf578..0000000 --- a/odb/sqlite/traits.hxx +++ /dev/null @@ -1,1099 +0,0 @@ -// file : odb/sqlite/traits.hxx -// license : GNU GPL v2; see accompanying LICENSE file - -#ifndef ODB_SQLITE_TRAITS_HXX -#define ODB_SQLITE_TRAITS_HXX - -#include <odb/pre.hxx> - -#include <odb/details/config.hxx> // ODB_CXX11 - -#include <string> -#include <vector> -#include <limits> // std::numeric_limits -#include <cstddef> // std::size_t -#include <cstring> // std::memcpy, std::memset, std::strlen - -#ifdef ODB_CXX11 -# include <array> -#endif - -#include <odb/traits.hxx> -#include <odb/wrapper-traits.hxx> - -#include <odb/details/buffer.hxx> -#include <odb/details/wrapper-p.hxx> - -#include <odb/sqlite/forward.hxx> -#include <odb/sqlite/version.hxx> -#include <odb/sqlite/sqlite-types.hxx> -#include <odb/sqlite/details/export.hxx> - -#include <odb/sqlite/text.hxx> -#include <odb/sqlite/blob.hxx> - -namespace odb -{ - namespace sqlite - { - // - // image_traits - // - - template <typename T, database_type_id> - struct image_traits; - - template <typename T> - struct image_traits<T, id_integer> {typedef long long image_type;}; - - template <typename T> - struct image_traits<T, id_real> {typedef double image_type;}; - - template <typename T> - struct image_traits<T, id_text> - { - typedef details::buffer image_type; - - // By default the text is in UTF-8. - // - static const bind::buffer_type bind_value = bind::text; - }; - - template <typename T> - struct image_traits<T, id_blob> {typedef details::buffer image_type;}; - - template <typename T> - struct image_traits<T, id_text_stream> - { - typedef stream_buffers image_type; - }; - - template <typename T> - struct image_traits<T, id_blob_stream> - { - typedef stream_buffers 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<wrapped_type, 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)); - } - - // TEXT and BLOB. - // - static void - set_value (W& v, const details::buffer& b, std::size_t n, bool is_null) - { - vtraits::set_value (wtraits::set_ref (v), b, n, is_null); - } - - static void - set_image (details::buffer& b, std::size_t& n, bool& is_null, const W& v) - { - vtraits::set_image (b, n, is_null, wtraits::get_ref (v)); - } - - // TEXT and BLOB STREAM. - // - static void - set_value (W& v, const stream_buffers& b, std::size_t n, bool is_null) - { - vtraits::set_value (wtraits::set_ref (v), b, n, is_null); - } - - static void - set_image (stream_buffers& b, std::size_t& n, bool& is_null, const W& v) - { - vtraits::set_image (b, n, 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<wrapped_type, 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)); - } - - // TEXT and BLOB. - // - static void - set_value (W& v, const details::buffer& b, std::size_t n, bool is_null) - { - if (is_null) - wtraits::set_null (v); - else - vtraits::set_value (wtraits::set_ref (v), b, n, is_null); - } - - static void - set_image (details::buffer& b, std::size_t& n, bool& is_null, const W& v) - { - is_null = wtraits::get_null (v); - - if (!is_null) - vtraits::set_image (b, n, is_null, wtraits::get_ref (v)); - } - - // TEXT and BLOB STREAM. - // - static void - set_value (W& v, const stream_buffers& b, std::size_t n, bool is_null) - { - if (is_null) - wtraits::set_null (v); - else - vtraits::set_value (wtraits::set_ref (v), b, n, is_null); - } - - static void - set_image (stream_buffers& b, std::size_t& n, bool& is_null, const W& v) - { - is_null = wtraits::get_null (v); - - if (!is_null) - vtraits::set_image (b, n, 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<T, 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); - } - }; - - // 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 default_value_traits<float, id_real>: real_value_traits<float> {}; - - template <> - struct default_value_traits<double, id_real>: real_value_traits<double> {}; - - // std::string specialization. - // - template <> - struct LIBODB_SQLITE_EXPORT default_value_traits<std::string, id_text> - { - typedef std::string value_type; - typedef std::string query_type; - typedef details::buffer image_type; - - static void - set_value (std::string& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - v.assign (b.data (), n); - else - v.erase (); - } - - static void - set_image (details::buffer&, - std::size_t& n, - bool& is_null, - const std::string&); - }; - - // char*/const char* specialization - // - // 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. - // - struct LIBODB_SQLITE_EXPORT c_string_value_traits - { - typedef const char* value_type; - typedef details::buffer image_type; - - static void - set_image (details::buffer&, - std::size_t& n, - bool& is_null, - const char*); - }; - - template <> - struct default_value_traits<char*, id_text>: c_string_value_traits {}; - - template <> - struct default_value_traits<const char*, id_text>: - c_string_value_traits {}; - - // char[N] specialization. - // - struct LIBODB_SQLITE_EXPORT c_array_value_traits_base - { - static void - set_value (char* const& v, - const details::buffer& b, - std::size_t n, - bool is_null, - std::size_t N); - - static void - set_image (details::buffer& b, - 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_text> - { - typedef char* value_type; - typedef char query_type[N]; - typedef details::buffer image_type; - - static void - set_value (char* const& v, - const details::buffer& 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 (details::buffer& b, - std::size_t& n, - bool& is_null, - const char* v) - { - c_array_value_traits_base::set_image (b, 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_text> - { - 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 details::buffer& 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 (details::buffer& b, - std::size_t& n, - bool& is_null, - const value_type& v) - { - c_array_value_traits_base::set_image (b, n, is_null, v.data (), N); - } - }; -#endif - - // char specialization. - // - template <> - struct default_value_traits<char, id_text> - { - typedef char value_type; - typedef char query_type; - typedef details::buffer image_type; - - static void - set_value (char& v, - const details::buffer& 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 (details::buffer& b, - std::size_t& n, - bool& is_null, - char v) - { - c_array_value_traits_base::set_image (b, n, is_null, &v, 1); - } - }; - -#ifdef _WIN32 - // std::wstring specialization. Using UTF-16 binding. - // - struct wstring_image_traits - { - typedef details::buffer image_type; - static const bind::buffer_type bind_value = bind::text16; - }; - - template <> - struct image_traits<std::wstring, id_text>: wstring_image_traits {}; - - template <> - struct LIBODB_SQLITE_EXPORT default_value_traits<std::wstring, id_text> - { - typedef std::wstring value_type; - typedef std::wstring query_type; - typedef details::buffer image_type; - - static void - set_value (std::wstring& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - v.assign (reinterpret_cast<const wchar_t*> (b.data ()), n / 2); - else - v.erase (); - } - - static void - set_image (details::buffer&, - std::size_t& n, - bool& is_null, - const std::wstring&); - }; - - // wchar_t*/const wchar_t* specialization. - // - struct LIBODB_SQLITE_EXPORT c_wstring_value_traits - { - typedef const wchar_t* value_type; - typedef details::buffer image_type; - - static void - set_image (details::buffer&, - std::size_t& n, - bool& is_null, - const wchar_t*); - }; - - template <> - struct image_traits<wchar_t*, id_text>: wstring_image_traits {}; - - template <> - struct default_value_traits<wchar_t*, id_text>: c_wstring_value_traits {}; - - template <> - struct image_traits<const wchar_t*, id_text>: wstring_image_traits {}; - - template <> - struct default_value_traits<const wchar_t*, id_text>: - c_wstring_value_traits {}; - - // wchar_t[N] specialization. - // - struct LIBODB_SQLITE_EXPORT c_warray_value_traits_base - { - static void - set_value (wchar_t* const& v, - const details::buffer& b, - std::size_t n, - bool is_null, - std::size_t N); - - static void - set_image (details::buffer& b, - std::size_t& n, - bool& is_null, - const wchar_t* v, - std::size_t N); - }; - - template <std::size_t N> - struct image_traits<wchar_t[N], id_text>: wstring_image_traits {}; - - template <std::size_t N> - struct default_value_traits<wchar_t[N], id_text> - { - 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 details::buffer& 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 (details::buffer& b, - std::size_t& n, - bool& is_null, - const wchar_t* v) - { - c_warray_value_traits_base::set_image (b, n, is_null, v, N); - } - }; - - // std::array<wchar_t, N> (string) specialization. - // -#ifdef ODB_CXX11 - template <std::size_t N> - struct image_traits<std::array<wchar_t, N>, id_text>: - wstring_image_traits {}; - - template <std::size_t N> - struct default_value_traits<std::array<wchar_t, N>, id_text> - { - 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 details::buffer& 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 (details::buffer& b, - std::size_t& n, - bool& is_null, - const value_type& v) - { - c_warray_value_traits_base::set_image (b, n, is_null, v.data (), N); - } - }; -#endif - - // wchar_t specialization. - // - template <> - struct image_traits<wchar_t, id_text>: wstring_image_traits {}; - - template <> - struct default_value_traits<wchar_t, id_text> - { - typedef wchar_t value_type; - typedef wchar_t query_type; - typedef details::buffer image_type; - - static void - set_value (wchar_t& v, - const details::buffer& 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 (details::buffer& b, - std::size_t& n, - bool& is_null, - wchar_t v) - { - c_warray_value_traits_base::set_image (b, n, is_null, &v, 1); - } - }; -#endif // _WIN32 - - // std::vector<char> (buffer) specialization. - // - template <> - struct LIBODB_SQLITE_EXPORT default_value_traits< - std::vector<char>, id_blob> - { - public: - typedef std::vector<char> value_type; - typedef std::vector<char> query_type; - typedef details::buffer image_type; - - static void - set_value (value_type& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - v.assign (b.data (), b.data () + n); - else - v.clear (); - } - - static void - set_image (details::buffer&, - std::size_t& n, - bool& is_null, - const value_type&); - }; - - // std::vector<unsigned char> (buffer) specialization. - // - template <> - struct LIBODB_SQLITE_EXPORT default_value_traits< - std::vector<unsigned char>, id_blob> - { - public: - typedef std::vector<unsigned char> value_type; - typedef std::vector<unsigned char> query_type; - typedef details::buffer image_type; - - static void - set_value (value_type& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - { - const unsigned char* d ( - reinterpret_cast<const unsigned char*> (b.data ())); - v.assign (d, d + n); - } - else - v.clear (); - } - - static void - set_image (details::buffer&, - std::size_t& n, - bool& is_null, - const value_type&); - }; - - // char[N] (buffer) specialization. - // - template <std::size_t N> - struct default_value_traits<char[N], id_blob> - { - public: - typedef char* value_type; - typedef char query_type[N]; - typedef details::buffer image_type; - - static void - set_value (char* const& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - std::memcpy (v, b.data (), (n < N ? n : N)); - else - std::memset (v, 0, N); - } - - static void - set_image (details::buffer& b, - std::size_t& n, - bool& is_null, - const char* v) - { - is_null = false; - n = N; - - if (n > b.capacity ()) - b.capacity (n); - - std::memcpy (b.data (), v, n); - } - }; - - // unsigned char[N] (buffer) specialization. - // - template <std::size_t N> - struct default_value_traits<unsigned char[N], id_blob> - { - public: - typedef unsigned char* value_type; - typedef unsigned char query_type[N]; - typedef details::buffer image_type; - - static void - set_value (unsigned char* const& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - std::memcpy (v, b.data (), (n < N ? n : N)); - else - std::memset (v, 0, N); - } - - static void - set_image (details::buffer& b, - std::size_t& n, - bool& is_null, - const unsigned char* v) - { - is_null = false; - n = N; - - if (n > b.capacity ()) - b.capacity (n); - - std::memcpy (b.data (), v, n); - } - }; - -#ifdef ODB_CXX11 - // std::array<char, N> (buffer) specialization. - // - template <std::size_t N> - struct default_value_traits<std::array<char, N>, id_blob> - { - public: - typedef std::array<char, N> value_type; - typedef value_type query_type; - typedef details::buffer image_type; - - static void - set_value (value_type& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - std::memcpy (v.data (), b.data (), (n < N ? n : N)); - else - std::memset (v.data (), 0, N); - } - - static void - set_image (details::buffer& b, - std::size_t& n, - bool& is_null, - const value_type& v) - { - is_null = false; - n = N; - - if (n > b.capacity ()) - b.capacity (n); - - std::memcpy (b.data (), v.data (), n); - } - }; - - // std::array<unsigned char, N> (buffer) specialization. - // - template <std::size_t N> - struct default_value_traits<std::array<unsigned char, N>, id_blob> - { - public: - typedef std::array<unsigned char, N> value_type; - typedef value_type query_type; - typedef details::buffer image_type; - - static void - set_value (value_type& v, - const details::buffer& b, - std::size_t n, - bool is_null) - { - if (!is_null) - std::memcpy (v.data (), b.data (), (n < N ? n : N)); - else - std::memset (v.data (), 0, N); - } - - static void - set_image (details::buffer& b, - std::size_t& n, - bool& is_null, - const value_type& v) - { - is_null = false; - n = N; - - if (n > b.capacity ()) - b.capacity (n); - - std::memcpy (b.data (), v.data (), n); - } - }; -#endif - - // text (stream) specialization. - // - template <> - struct default_value_traits<text, id_text_stream> - { - public: - typedef text value_type; - typedef std::string query_type; - typedef stream_buffers image_type; - - static void - set_value (text& v, const stream_buffers& b, std::size_t, bool is_null) - { - if (!is_null) - { - v.db_ = b.db.in; - v.table_ = b.table.in; - v.column_ = b.column.in; - v.rowid_ = b.rowid.in; - } - } - - static void - set_image (stream_buffers& b, - std::size_t& n, - bool& is_null, - const text& v) - { - is_null = false; - n = v.size_; - - b.db.out = &v.db_; - b.table.out = &v.table_; - b.column.out = &v.column_; - b.rowid.out = &v.rowid_; - } - }; - - // blob (stream) specialization. - // - template <> - struct default_value_traits<blob, id_blob_stream> - { - public: - typedef blob value_type; - typedef std::vector<char> query_type; - typedef stream_buffers image_type; - - static void - set_value (blob& v, const stream_buffers& b, std::size_t, bool is_null) - { - if (!is_null) - { - v.db_ = b.db.in; - v.table_ = b.table.in; - v.column_ = b.column.in; - v.rowid_ = b.rowid.in; - } - } - - static void - set_image (stream_buffers& b, - std::size_t& n, - bool& is_null, - const blob& v) - { - is_null = false; - n = v.size_; - - b.db.out = &v.db_; - b.table.out = &v.table_; - b.column.out = &v.column_; - b.rowid.out = &v.rowid_; - } - }; - - // - // 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_integer; - }; - - template <> - struct default_type_traits<signed char> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<unsigned char> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<short> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<unsigned short> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<int> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<unsigned int> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<long> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<unsigned long> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<long long> - { - static const database_type_id db_type_id = id_integer; - }; - - template <> - struct default_type_traits<unsigned long long> - { - static const database_type_id db_type_id = id_integer; - }; - - // Float types. - // - template <> - struct default_type_traits<float> - { - static const database_type_id db_type_id = id_real; - }; - - template <> - struct default_type_traits<double> - { - static const database_type_id db_type_id = id_real; - }; - - // String types. - // - template <> - struct default_type_traits<std::string> - { - static const database_type_id db_type_id = id_text; - }; - - template <> - struct default_type_traits<char*> - { - static const database_type_id db_type_id = id_text; - }; - - template <> - struct default_type_traits<const char*> - { - static const database_type_id db_type_id = id_text; - }; - - template <std::size_t N> - struct default_type_traits<char[N]> - { - static const database_type_id db_type_id = id_text; - }; - -#ifdef ODB_CXX11 - template <std::size_t N> - struct default_type_traits<std::array<char, N> > - { - static const database_type_id db_type_id = id_text; - }; -#endif - - template <> - struct default_type_traits<char> - { - static const database_type_id db_type_id = id_text; - }; - - // Binary types. - // - template <std::size_t N> - struct default_type_traits<unsigned char[N]> - { - static const database_type_id db_type_id = id_blob; - }; - - template <> - struct default_type_traits<std::vector<char> > - { - static const database_type_id db_type_id = id_blob; - }; - - template <> - struct default_type_traits<std::vector<unsigned char> > - { - static const database_type_id db_type_id = id_blob; - }; - -#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_blob; - }; -#endif - - template <> - struct default_type_traits<text> - { - static const database_type_id db_type_id = id_text_stream; - }; - - template <> - struct default_type_traits<blob> - { - static const database_type_id db_type_id = id_blob_stream; - }; - } -} - -#include <odb/post.hxx> - -#endif // ODB_SQLITE_TRAITS_HXX |