1048 rindas
33 KiB
C++
1048 rindas
33 KiB
C++
#pragma once
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#include <algorithm>
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#include <cctype>
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#include <string>
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#include <functional>
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#include <ctime>
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#include <tuple>
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#include <memory>
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#include <vector>
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#define MODERN_SQLITE_VERSION 3002008
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#ifdef __has_include
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#if __cplusplus > 201402 && __has_include(<optional>)
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#define MODERN_SQLITE_STD_OPTIONAL_SUPPORT
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#elif __has_include(<experimental/optional>)
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#define MODERN_SQLITE_EXPERIMENTAL_OPTIONAL_SUPPORT
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#endif
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#endif
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#ifdef __has_include
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#if __cplusplus > 201402 && __has_include(<variant>)
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#define MODERN_SQLITE_STD_VARIANT_SUPPORT
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#endif
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#endif
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#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
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#include <optional>
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#endif
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#ifdef MODERN_SQLITE_EXPERIMENTAL_OPTIONAL_SUPPORT
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#include <experimental/optional>
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#define MODERN_SQLITE_STD_OPTIONAL_SUPPORT
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#endif
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#ifdef _MODERN_SQLITE_BOOST_OPTIONAL_SUPPORT
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#include <boost/optional.hpp>
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#endif
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#include <sqlite3.h>
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#include "sqlite_modern_cpp/errors.h"
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#include "sqlite_modern_cpp/utility/function_traits.h"
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#include "sqlite_modern_cpp/utility/uncaught_exceptions.h"
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#include "sqlite_modern_cpp/utility/utf16_utf8.h"
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#ifdef MODERN_SQLITE_STD_VARIANT_SUPPORT
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#include "sqlite_modern_cpp/utility/variant.h"
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#endif
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namespace sqlite {
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// std::optional support for NULL values
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#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
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#ifdef MODERN_SQLITE_EXPERIMENTAL_OPTIONAL_SUPPORT
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template<class T>
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using optional = std::experimental::optional<T>;
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#else
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template<class T>
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using optional = std::optional<T>;
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#endif
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#endif
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class database;
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class database_binder;
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template<std::size_t> class binder;
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typedef std::shared_ptr<sqlite3> connection_type;
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template<typename Tuple, int Element = 0, bool Last = (std::tuple_size<Tuple>::value == Element)> struct tuple_iterate {
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static void iterate(Tuple& t, database_binder& db) {
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get_col_from_db(db, Element, std::get<Element>(t));
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tuple_iterate<Tuple, Element + 1>::iterate(t, db);
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}
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};
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template<typename Tuple, int Element> struct tuple_iterate<Tuple, Element, true> {
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static void iterate(Tuple&, database_binder&) {}
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};
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class database_binder {
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public:
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// database_binder is not copyable
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database_binder() = delete;
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database_binder(const database_binder& other) = delete;
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database_binder& operator=(const database_binder&) = delete;
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database_binder(database_binder&& other) :
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_db(std::move(other._db)),
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_stmt(std::move(other._stmt)),
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_inx(other._inx), execution_started(other.execution_started) { }
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void execute() {
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_start_execute();
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int hresult;
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while((hresult = sqlite3_step(_stmt.get())) == SQLITE_ROW) {}
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if(hresult != SQLITE_DONE) {
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errors::throw_sqlite_error(hresult, sql());
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}
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}
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std::string sql() {
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#if SQLITE_VERSION_NUMBER >= 3014000
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auto sqlite_deleter = [](void *ptr) {sqlite3_free(ptr);};
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std::unique_ptr<char, decltype(sqlite_deleter)> str(sqlite3_expanded_sql(_stmt.get()), sqlite_deleter);
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return str ? str.get() : original_sql();
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#else
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return original_sql();
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#endif
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}
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std::string original_sql() {
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return sqlite3_sql(_stmt.get());
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}
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void used(bool state) {
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if(!state) {
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// We may have to reset first if we haven't done so already:
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_next_index();
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--_inx;
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}
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execution_started = state;
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}
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bool used() const { return execution_started; }
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private:
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std::shared_ptr<sqlite3> _db;
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std::unique_ptr<sqlite3_stmt, decltype(&sqlite3_finalize)> _stmt;
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utility::UncaughtExceptionDetector _has_uncaught_exception;
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int _inx;
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bool execution_started = false;
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int _next_index() {
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if(execution_started && !_inx) {
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sqlite3_reset(_stmt.get());
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sqlite3_clear_bindings(_stmt.get());
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}
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return ++_inx;
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}
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void _start_execute() {
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_next_index();
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_inx = 0;
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used(true);
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}
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void _extract(std::function<void(void)> call_back) {
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int hresult;
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_start_execute();
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while((hresult = sqlite3_step(_stmt.get())) == SQLITE_ROW) {
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call_back();
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}
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if(hresult != SQLITE_DONE) {
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errors::throw_sqlite_error(hresult, sql());
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}
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}
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void _extract_single_value(std::function<void(void)> call_back) {
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int hresult;
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_start_execute();
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if((hresult = sqlite3_step(_stmt.get())) == SQLITE_ROW) {
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call_back();
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} else if(hresult == SQLITE_DONE) {
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throw errors::no_rows("no rows to extract: exactly 1 row expected", sql(), SQLITE_DONE);
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}
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if((hresult = sqlite3_step(_stmt.get())) == SQLITE_ROW) {
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throw errors::more_rows("not all rows extracted", sql(), SQLITE_ROW);
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}
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if(hresult != SQLITE_DONE) {
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errors::throw_sqlite_error(hresult, sql());
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}
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}
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sqlite3_stmt* _prepare(const std::u16string& sql) {
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return _prepare(utility::utf16_to_utf8(sql));
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}
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sqlite3_stmt* _prepare(const std::string& sql) {
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int hresult;
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sqlite3_stmt* tmp = nullptr;
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const char *remaining;
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hresult = sqlite3_prepare_v2(_db.get(), sql.data(), -1, &tmp, &remaining);
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if(hresult != SQLITE_OK) errors::throw_sqlite_error(hresult, sql);
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if(!std::all_of(remaining, sql.data() + sql.size(), [](char ch) {return std::isspace(ch);}))
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throw errors::more_statements("Multiple semicolon separated statements are unsupported", sql);
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return tmp;
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}
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template <typename Type>
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struct is_sqlite_value : public std::integral_constant<
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bool,
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std::is_floating_point<Type>::value
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|| std::is_integral<Type>::value
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|| std::is_same<std::string, Type>::value
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|| std::is_same<std::u16string, Type>::value
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|| std::is_same<sqlite_int64, Type>::value
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> { };
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template <typename Type, typename Allocator>
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struct is_sqlite_value< std::vector<Type, Allocator> > : public std::integral_constant<
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bool,
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std::is_floating_point<Type>::value
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|| std::is_integral<Type>::value
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|| std::is_same<sqlite_int64, Type>::value
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> { };
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#ifdef MODERN_SQLITE_STD_VARIANT_SUPPORT
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template <typename ...Args>
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struct is_sqlite_value< std::variant<Args...> > : public std::integral_constant<
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bool,
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true
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> { };
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#endif
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/* for vector<T, A> support */
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template<typename T, typename A> friend database_binder& operator <<(database_binder& db, const std::vector<T, A>& val);
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template<typename T, typename A> friend void get_col_from_db(database_binder& db, int inx, std::vector<T, A>& val);
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/* for nullptr & unique_ptr support */
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friend database_binder& operator <<(database_binder& db, std::nullptr_t);
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template<typename T> friend database_binder& operator <<(database_binder& db, const std::unique_ptr<T>& val);
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template<typename T> friend void get_col_from_db(database_binder& db, int inx, std::unique_ptr<T>& val);
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#ifdef MODERN_SQLITE_STD_VARIANT_SUPPORT
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template<typename ...Args> friend database_binder& operator <<(database_binder& db, const std::variant<Args...>& val);
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template<typename ...Args> friend void get_col_from_db(database_binder& db, int inx, std::variant<Args...>& val);
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#endif
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template<typename T> friend T operator++(database_binder& db, int);
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// Overload instead of specializing function templates (http://www.gotw.ca/publications/mill17.htm)
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friend database_binder& operator<<(database_binder& db, const int& val);
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friend void get_col_from_db(database_binder& db, int inx, int& val);
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friend database_binder& operator <<(database_binder& db, const sqlite_int64& val);
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friend void get_col_from_db(database_binder& db, int inx, sqlite3_int64& i);
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friend database_binder& operator <<(database_binder& db, const float& val);
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friend void get_col_from_db(database_binder& db, int inx, float& f);
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friend database_binder& operator <<(database_binder& db, const double& val);
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friend void get_col_from_db(database_binder& db, int inx, double& d);
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friend void get_col_from_db(database_binder& db, int inx, std::string & s);
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friend database_binder& operator <<(database_binder& db, const std::string& txt);
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friend void get_col_from_db(database_binder& db, int inx, std::u16string & w);
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friend database_binder& operator <<(database_binder& db, const std::u16string& txt);
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#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
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template <typename OptionalT> friend database_binder& operator <<(database_binder& db, const optional<OptionalT>& val);
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template <typename OptionalT> friend void get_col_from_db(database_binder& db, int inx, optional<OptionalT>& o);
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#endif
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#ifdef _MODERN_SQLITE_BOOST_OPTIONAL_SUPPORT
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template <typename BoostOptionalT> friend database_binder& operator <<(database_binder& db, const boost::optional<BoostOptionalT>& val);
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template <typename BoostOptionalT> friend void get_col_from_db(database_binder& db, int inx, boost::optional<BoostOptionalT>& o);
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#endif
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public:
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database_binder(std::shared_ptr<sqlite3> db, std::u16string const & sql):
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_db(db),
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_stmt(_prepare(sql), sqlite3_finalize),
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_inx(0) {
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}
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database_binder(std::shared_ptr<sqlite3> db, std::string const & sql):
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_db(db),
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_stmt(_prepare(sql), sqlite3_finalize),
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_inx(0) {
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}
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~database_binder() noexcept(false) {
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/* Will be executed if no >>op is found, but not if an exception
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is in mid flight */
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if(!used() && !_has_uncaught_exception && _stmt) {
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execute();
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}
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}
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template <typename Result>
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typename std::enable_if<is_sqlite_value<Result>::value, void>::type operator>>(
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Result& value) {
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this->_extract_single_value([&value, this] {
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get_col_from_db(*this, 0, value);
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});
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}
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template<typename... Types>
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void operator>>(std::tuple<Types...>&& values) {
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this->_extract_single_value([&values, this] {
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tuple_iterate<std::tuple<Types...>>::iterate(values, *this);
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});
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}
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template <typename Function>
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typename std::enable_if<!is_sqlite_value<Function>::value, void>::type operator>>(
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Function&& func) {
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typedef utility::function_traits<Function> traits;
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this->_extract([&func, this]() {
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binder<traits::arity>::run(*this, func);
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});
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}
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};
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namespace sql_function_binder {
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template<
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typename ContextType,
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std::size_t Count,
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typename Functions
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>
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inline void step(
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sqlite3_context* db,
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int count,
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sqlite3_value** vals
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);
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template<
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std::size_t Count,
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typename Functions,
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typename... Values
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>
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inline typename std::enable_if<(sizeof...(Values) && sizeof...(Values) < Count), void>::type step(
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sqlite3_context* db,
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int count,
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sqlite3_value** vals,
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Values&&... values
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);
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template<
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std::size_t Count,
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typename Functions,
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typename... Values
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>
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inline typename std::enable_if<(sizeof...(Values) == Count), void>::type step(
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sqlite3_context* db,
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int,
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sqlite3_value**,
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Values&&... values
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);
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template<
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typename ContextType,
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typename Functions
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>
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inline void final(sqlite3_context* db);
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template<
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std::size_t Count,
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typename Function,
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typename... Values
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>
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inline typename std::enable_if<(sizeof...(Values) < Count), void>::type scalar(
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sqlite3_context* db,
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int count,
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sqlite3_value** vals,
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Values&&... values
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);
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template<
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std::size_t Count,
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typename Function,
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typename... Values
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>
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inline typename std::enable_if<(sizeof...(Values) == Count), void>::type scalar(
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sqlite3_context* db,
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int,
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sqlite3_value**,
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Values&&... values
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);
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}
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enum class OpenFlags {
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READONLY = SQLITE_OPEN_READONLY,
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READWRITE = SQLITE_OPEN_READWRITE,
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CREATE = SQLITE_OPEN_CREATE,
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NOMUTEX = SQLITE_OPEN_NOMUTEX,
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FULLMUTEX = SQLITE_OPEN_FULLMUTEX,
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SHAREDCACHE = SQLITE_OPEN_SHAREDCACHE,
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PRIVATECACH = SQLITE_OPEN_PRIVATECACHE,
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URI = SQLITE_OPEN_URI
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};
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inline OpenFlags operator|(const OpenFlags& a, const OpenFlags& b) {
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return static_cast<OpenFlags>(static_cast<int>(a) | static_cast<int>(b));
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}
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enum class Encoding {
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ANY = SQLITE_ANY,
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UTF8 = SQLITE_UTF8,
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UTF16 = SQLITE_UTF16
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};
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struct sqlite_config {
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OpenFlags flags = OpenFlags::READWRITE | OpenFlags::CREATE;
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const char *zVfs = nullptr;
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Encoding encoding = Encoding::ANY;
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};
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class database {
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protected:
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std::shared_ptr<sqlite3> _db;
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public:
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database(const std::string &db_name, const sqlite_config &config = {}): _db(nullptr) {
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sqlite3* tmp = nullptr;
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auto ret = sqlite3_open_v2(db_name.data(), &tmp, static_cast<int>(config.flags), config.zVfs);
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_db = std::shared_ptr<sqlite3>(tmp, [=](sqlite3* ptr) { sqlite3_close_v2(ptr); }); // this will close the connection eventually when no longer needed.
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if(ret != SQLITE_OK) errors::throw_sqlite_error(_db ? sqlite3_extended_errcode(_db.get()) : ret);
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sqlite3_extended_result_codes(_db.get(), true);
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if(config.encoding == Encoding::UTF16)
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*this << R"(PRAGMA encoding = "UTF-16";)";
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}
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database(const std::u16string &db_name, const sqlite_config &config = {}): _db(nullptr) {
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auto db_name_utf8 = utility::utf16_to_utf8(db_name);
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sqlite3* tmp = nullptr;
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auto ret = sqlite3_open_v2(db_name_utf8.data(), &tmp, static_cast<int>(config.flags), config.zVfs);
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_db = std::shared_ptr<sqlite3>(tmp, [=](sqlite3* ptr) { sqlite3_close_v2(ptr); }); // this will close the connection eventually when no longer needed.
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if(ret != SQLITE_OK) errors::throw_sqlite_error(_db ? sqlite3_extended_errcode(_db.get()) : ret);
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sqlite3_extended_result_codes(_db.get(), true);
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if(config.encoding != Encoding::UTF8)
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*this << R"(PRAGMA encoding = "UTF-16";)";
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}
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database(std::shared_ptr<sqlite3> db):
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_db(db) {}
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database_binder operator<<(const std::string& sql) {
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return database_binder(_db, sql);
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}
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database_binder operator<<(const char* sql) {
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return *this << std::string(sql);
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}
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database_binder operator<<(const std::u16string& sql) {
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return database_binder(_db, sql);
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}
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database_binder operator<<(const char16_t* sql) {
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return *this << std::u16string(sql);
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}
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connection_type connection() const { return _db; }
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sqlite3_int64 last_insert_rowid() const {
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return sqlite3_last_insert_rowid(_db.get());
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}
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template <typename Function>
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void define(const std::string &name, Function&& func) {
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typedef utility::function_traits<Function> traits;
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auto funcPtr = new auto(std::forward<Function>(func));
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if(int result = sqlite3_create_function_v2(
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_db.get(), name.c_str(), traits::arity, SQLITE_UTF8, funcPtr,
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sql_function_binder::scalar<traits::arity, typename std::remove_reference<Function>::type>,
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nullptr, nullptr, [](void* ptr){
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delete static_cast<decltype(funcPtr)>(ptr);
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}))
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errors::throw_sqlite_error(result);
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}
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template <typename StepFunction, typename FinalFunction>
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void define(const std::string &name, StepFunction&& step, FinalFunction&& final) {
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typedef utility::function_traits<StepFunction> traits;
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using ContextType = typename std::remove_reference<typename traits::template argument<0>>::type;
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auto funcPtr = new auto(std::make_pair(std::forward<StepFunction>(step), std::forward<FinalFunction>(final)));
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if(int result = sqlite3_create_function_v2(
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_db.get(), name.c_str(), traits::arity - 1, SQLITE_UTF8, funcPtr, nullptr,
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sql_function_binder::step<ContextType, traits::arity, typename std::remove_reference<decltype(*funcPtr)>::type>,
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sql_function_binder::final<ContextType, typename std::remove_reference<decltype(*funcPtr)>::type>,
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[](void* ptr){
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delete static_cast<decltype(funcPtr)>(ptr);
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}))
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errors::throw_sqlite_error(result);
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}
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};
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template<std::size_t Count>
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class binder {
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private:
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template <
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typename Function,
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std::size_t Index
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>
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using nth_argument_type = typename utility::function_traits<
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Function
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>::template argument<Index>;
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public:
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// `Boundary` needs to be defaulted to `Count` so that the `run` function
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// template is not implicitly instantiated on class template instantiation.
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// Look up section 14.7.1 _Implicit instantiation_ of the ISO C++14 Standard
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// and the [dicussion](https://github.com/aminroosta/sqlite_modern_cpp/issues/8)
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// on Github.
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template<
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typename Function,
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typename... Values,
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std::size_t Boundary = Count
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>
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static typename std::enable_if<(sizeof...(Values) < Boundary), void>::type run(
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database_binder& db,
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Function&& function,
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Values&&... values
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) {
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typename std::remove_cv<typename std::remove_reference<nth_argument_type<Function, sizeof...(Values)>>::type>::type value{};
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get_col_from_db(db, sizeof...(Values), value);
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run<Function>(db, function, std::forward<Values>(values)..., std::move(value));
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}
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template<
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typename Function,
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typename... Values,
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std::size_t Boundary = Count
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>
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static typename std::enable_if<(sizeof...(Values) == Boundary), void>::type run(
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database_binder&,
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Function&& function,
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Values&&... values
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) {
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function(std::move(values)...);
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}
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};
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// int
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inline database_binder& operator<<(database_binder& db, const int& val) {
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int hresult;
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if((hresult = sqlite3_bind_int(db._stmt.get(), db._next_index(), val)) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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inline void store_result_in_db(sqlite3_context* db, const int& val) {
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sqlite3_result_int(db, val);
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}
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inline void get_col_from_db(database_binder& db, int inx, int& val) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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val = 0;
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} else {
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val = sqlite3_column_int(db._stmt.get(), inx);
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}
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}
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inline void get_val_from_db(sqlite3_value *value, int& val) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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val = 0;
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} else {
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val = sqlite3_value_int(value);
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}
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}
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// sqlite_int64
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inline database_binder& operator <<(database_binder& db, const sqlite_int64& val) {
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int hresult;
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if((hresult = sqlite3_bind_int64(db._stmt.get(), db._next_index(), val)) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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inline void store_result_in_db(sqlite3_context* db, const sqlite_int64& val) {
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sqlite3_result_int64(db, val);
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}
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inline void get_col_from_db(database_binder& db, int inx, sqlite3_int64& i) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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i = 0;
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} else {
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i = sqlite3_column_int64(db._stmt.get(), inx);
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}
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}
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inline void get_val_from_db(sqlite3_value *value, sqlite3_int64& i) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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i = 0;
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} else {
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i = sqlite3_value_int64(value);
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}
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}
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// float
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inline database_binder& operator <<(database_binder& db, const float& val) {
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int hresult;
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if((hresult = sqlite3_bind_double(db._stmt.get(), db._next_index(), double(val))) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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inline void store_result_in_db(sqlite3_context* db, const float& val) {
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sqlite3_result_double(db, val);
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}
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inline void get_col_from_db(database_binder& db, int inx, float& f) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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f = 0;
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} else {
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f = float(sqlite3_column_double(db._stmt.get(), inx));
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}
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}
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inline void get_val_from_db(sqlite3_value *value, float& f) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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f = 0;
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} else {
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f = float(sqlite3_value_double(value));
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}
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}
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// double
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inline database_binder& operator <<(database_binder& db, const double& val) {
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int hresult;
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if((hresult = sqlite3_bind_double(db._stmt.get(), db._next_index(), val)) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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inline void store_result_in_db(sqlite3_context* db, const double& val) {
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sqlite3_result_double(db, val);
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}
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inline void get_col_from_db(database_binder& db, int inx, double& d) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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d = 0;
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} else {
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d = sqlite3_column_double(db._stmt.get(), inx);
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}
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}
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inline void get_val_from_db(sqlite3_value *value, double& d) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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d = 0;
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} else {
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d = sqlite3_value_double(value);
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}
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}
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// vector<T, A>
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template<typename T, typename A> inline database_binder& operator<<(database_binder& db, const std::vector<T, A>& vec) {
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void const* buf = reinterpret_cast<void const *>(vec.data());
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int bytes = vec.size() * sizeof(T);
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int hresult;
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if((hresult = sqlite3_bind_blob(db._stmt.get(), db._next_index(), buf, bytes, SQLITE_TRANSIENT)) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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template<typename T, typename A> inline void store_result_in_db(sqlite3_context* db, const std::vector<T, A>& vec) {
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void const* buf = reinterpret_cast<void const *>(vec.data());
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int bytes = vec.size() * sizeof(T);
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sqlite3_result_blob(db, buf, bytes, SQLITE_TRANSIENT);
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}
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template<typename T, typename A> inline void get_col_from_db(database_binder& db, int inx, std::vector<T, A>& vec) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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vec.clear();
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} else {
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int bytes = sqlite3_column_bytes(db._stmt.get(), inx);
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T const* buf = reinterpret_cast<T const *>(sqlite3_column_blob(db._stmt.get(), inx));
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vec = std::vector<T, A>(buf, buf + bytes/sizeof(T));
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}
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}
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template<typename T, typename A> inline void get_val_from_db(sqlite3_value *value, std::vector<T, A>& vec) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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vec.clear();
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} else {
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int bytes = sqlite3_value_bytes(value);
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T const* buf = reinterpret_cast<T const *>(sqlite3_value_blob(value));
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vec = std::vector<T, A>(buf, buf + bytes/sizeof(T));
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}
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}
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/* for nullptr support */
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inline database_binder& operator <<(database_binder& db, std::nullptr_t) {
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int hresult;
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if((hresult = sqlite3_bind_null(db._stmt.get(), db._next_index())) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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inline void store_result_in_db(sqlite3_context* db, std::nullptr_t) {
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sqlite3_result_null(db);
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}
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/* for nullptr support */
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template<typename T> inline database_binder& operator <<(database_binder& db, const std::unique_ptr<T>& val) {
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if(val)
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db << *val;
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else
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db << nullptr;
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return db;
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}
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/* for unique_ptr<T> support */
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template<typename T> inline void get_col_from_db(database_binder& db, int inx, std::unique_ptr<T>& _ptr_) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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_ptr_ = nullptr;
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} else {
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auto underling_ptr = new T();
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get_col_from_db(db, inx, *underling_ptr);
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_ptr_.reset(underling_ptr);
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}
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}
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template<typename T> inline void get_val_from_db(sqlite3_value *value, std::unique_ptr<T>& _ptr_) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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_ptr_ = nullptr;
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} else {
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auto underling_ptr = new T();
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get_val_from_db(value, *underling_ptr);
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_ptr_.reset(underling_ptr);
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}
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}
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// std::string
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inline void get_col_from_db(database_binder& db, int inx, std::string & s) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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s = std::string();
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} else {
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sqlite3_column_bytes(db._stmt.get(), inx);
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s = std::string(reinterpret_cast<char const *>(sqlite3_column_text(db._stmt.get(), inx)));
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}
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}
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inline void get_val_from_db(sqlite3_value *value, std::string & s) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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s = std::string();
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} else {
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sqlite3_value_bytes(value);
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s = std::string(reinterpret_cast<char const *>(sqlite3_value_text(value)));
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}
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}
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// Convert char* to string to trigger op<<(..., const std::string )
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template<std::size_t N> inline database_binder& operator <<(database_binder& db, const char(&STR)[N]) { return db << std::string(STR); }
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template<std::size_t N> inline database_binder& operator <<(database_binder& db, const char16_t(&STR)[N]) { return db << std::u16string(STR); }
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inline database_binder& operator <<(database_binder& db, const std::string& txt) {
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int hresult;
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if((hresult = sqlite3_bind_text(db._stmt.get(), db._next_index(), txt.data(), -1, SQLITE_TRANSIENT)) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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inline void store_result_in_db(sqlite3_context* db, const std::string& val) {
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sqlite3_result_text(db, val.data(), -1, SQLITE_TRANSIENT);
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}
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// std::u16string
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inline void get_col_from_db(database_binder& db, int inx, std::u16string & w) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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w = std::u16string();
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} else {
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sqlite3_column_bytes16(db._stmt.get(), inx);
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w = std::u16string(reinterpret_cast<char16_t const *>(sqlite3_column_text16(db._stmt.get(), inx)));
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}
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}
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inline void get_val_from_db(sqlite3_value *value, std::u16string & w) {
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if(sqlite3_value_type(value) == SQLITE_NULL) {
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w = std::u16string();
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} else {
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sqlite3_value_bytes16(value);
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w = std::u16string(reinterpret_cast<char16_t const *>(sqlite3_value_text16(value)));
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}
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}
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|
|
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inline database_binder& operator <<(database_binder& db, const std::u16string& txt) {
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int hresult;
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if((hresult = sqlite3_bind_text16(db._stmt.get(), db._next_index(), txt.data(), -1, SQLITE_TRANSIENT)) != SQLITE_OK) {
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errors::throw_sqlite_error(hresult, db.sql());
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}
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return db;
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}
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inline void store_result_in_db(sqlite3_context* db, const std::u16string& val) {
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sqlite3_result_text16(db, val.data(), -1, SQLITE_TRANSIENT);
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}
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// Other integer types
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template<class Integral, class = typename std::enable_if<std::is_integral<Integral>::value>::type>
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inline database_binder& operator <<(database_binder& db, const Integral& val) {
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return db << static_cast<sqlite3_int64>(val);
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}
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template<class Integral, class = std::enable_if<std::is_integral<Integral>::type>>
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inline void store_result_in_db(sqlite3_context* db, const Integral& val) {
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store_result_in_db(db, static_cast<sqlite3_int64>(val));
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|
}
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template<class Integral, class = typename std::enable_if<std::is_integral<Integral>::value>::type>
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inline void get_col_from_db(database_binder& db, int inx, Integral& val) {
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sqlite3_int64 i;
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get_col_from_db(db, inx, i);
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val = i;
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}
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template<class Integral, class = typename std::enable_if<std::is_integral<Integral>::value>::type>
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inline void get_val_from_db(sqlite3_value *value, Integral& val) {
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sqlite3_int64 i;
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get_val_from_db(value, i);
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val = i;
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}
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|
|
// std::optional support for NULL values
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|
#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
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template <typename OptionalT> inline database_binder& operator <<(database_binder& db, const optional<OptionalT>& val) {
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if(val) {
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return db << std::move(*val);
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} else {
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return db << nullptr;
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}
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|
}
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template <typename OptionalT> inline void store_result_in_db(sqlite3_context* db, const optional<OptionalT>& val) {
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if(val) {
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store_result_in_db(db, *val);
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}
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sqlite3_result_null(db);
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|
}
|
|
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template <typename OptionalT> inline void get_col_from_db(database_binder& db, int inx, optional<OptionalT>& o) {
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if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
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|
#ifdef MODERN_SQLITE_EXPERIMENTAL_OPTIONAL_SUPPORT
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o = std::experimental::nullopt;
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#else
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|
o.reset();
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|
#endif
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|
} else {
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|
OptionalT v;
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get_col_from_db(db, inx, v);
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o = std::move(v);
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|
}
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|
}
|
|
template <typename OptionalT> inline void get_val_from_db(sqlite3_value *value, optional<OptionalT>& o) {
|
|
if(sqlite3_value_type(value) == SQLITE_NULL) {
|
|
#ifdef MODERN_SQLITE_EXPERIMENTAL_OPTIONAL_SUPPORT
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|
o = std::experimental::nullopt;
|
|
#else
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|
o.reset();
|
|
#endif
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|
} else {
|
|
OptionalT v;
|
|
get_val_from_db(value, v);
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|
o = std::move(v);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// boost::optional support for NULL values
|
|
#ifdef _MODERN_SQLITE_BOOST_OPTIONAL_SUPPORT
|
|
template <typename BoostOptionalT> inline database_binder& operator <<(database_binder& db, const boost::optional<BoostOptionalT>& val) {
|
|
if(val) {
|
|
return db << std::move(*val);
|
|
} else {
|
|
return db << nullptr;
|
|
}
|
|
}
|
|
template <typename BoostOptionalT> inline void store_result_in_db(sqlite3_context* db, const boost::optional<BoostOptionalT>& val) {
|
|
if(val) {
|
|
store_result_in_db(db, *val);
|
|
}
|
|
sqlite3_result_null(db);
|
|
}
|
|
|
|
template <typename BoostOptionalT> inline void get_col_from_db(database_binder& db, int inx, boost::optional<BoostOptionalT>& o) {
|
|
if(sqlite3_column_type(db._stmt.get(), inx) == SQLITE_NULL) {
|
|
o.reset();
|
|
} else {
|
|
BoostOptionalT v;
|
|
get_col_from_db(db, inx, v);
|
|
o = std::move(v);
|
|
}
|
|
}
|
|
template <typename BoostOptionalT> inline void get_val_from_db(sqlite3_value *value, boost::optional<BoostOptionalT>& o) {
|
|
if(sqlite3_value_type(value) == SQLITE_NULL) {
|
|
o.reset();
|
|
} else {
|
|
BoostOptionalT v;
|
|
get_val_from_db(value, v);
|
|
o = std::move(v);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef MODERN_SQLITE_STD_VARIANT_SUPPORT
|
|
template <typename ...Args> inline database_binder& operator <<(database_binder& db, const std::variant<Args...>& val) {
|
|
std::visit([&](auto &&opt) {db << std::forward<decltype(opt)>(opt);}, val);
|
|
return db;
|
|
}
|
|
template <typename ...Args> inline void store_result_in_db(sqlite3_context* db, const std::variant<Args...>& val) {
|
|
std::visit([&](auto &&opt) {store_result_in_db(db, std::forward<decltype(opt)>(opt));}, val);
|
|
}
|
|
template <typename ...Args> inline void get_col_from_db(database_binder& db, int inx, std::variant<Args...>& val) {
|
|
utility::variant_select<Args...>(sqlite3_column_type(db._stmt.get(), inx))([&](auto v) {
|
|
get_col_from_db(db, inx, v);
|
|
val = std::move(v);
|
|
});
|
|
}
|
|
template <typename ...Args> inline void get_val_from_db(sqlite3_value *value, std::variant<Args...>& val) {
|
|
utility::variant_select<Args...>(sqlite3_value_type(value))([&](auto v) {
|
|
get_val_from_db(value, v);
|
|
val = std::move(v);
|
|
});
|
|
}
|
|
#endif
|
|
|
|
// Some ppl are lazy so we have a operator for proper prep. statemant handling.
|
|
void inline operator++(database_binder& db, int) { db.execute(); }
|
|
|
|
// Convert the rValue binder to a reference and call first op<<, its needed for the call that creates the binder (be carefull of recursion here!)
|
|
template<typename T> database_binder&& operator << (database_binder&& db, const T& val) { db << val; return std::move(db); }
|
|
|
|
namespace sql_function_binder {
|
|
template<class T>
|
|
struct AggregateCtxt {
|
|
T obj;
|
|
bool constructed = true;
|
|
};
|
|
|
|
template<
|
|
typename ContextType,
|
|
std::size_t Count,
|
|
typename Functions
|
|
>
|
|
inline void step(
|
|
sqlite3_context* db,
|
|
int count,
|
|
sqlite3_value** vals
|
|
) {
|
|
auto ctxt = static_cast<AggregateCtxt<ContextType>*>(sqlite3_aggregate_context(db, sizeof(AggregateCtxt<ContextType>)));
|
|
if(!ctxt) return;
|
|
try {
|
|
if(!ctxt->constructed) new(ctxt) AggregateCtxt<ContextType>();
|
|
step<Count, Functions>(db, count, vals, ctxt->obj);
|
|
return;
|
|
} catch(sqlite_exception &e) {
|
|
sqlite3_result_error_code(db, e.get_code());
|
|
sqlite3_result_error(db, e.what(), -1);
|
|
} catch(std::exception &e) {
|
|
sqlite3_result_error(db, e.what(), -1);
|
|
} catch(...) {
|
|
sqlite3_result_error(db, "Unknown error", -1);
|
|
}
|
|
if(ctxt && ctxt->constructed)
|
|
ctxt->~AggregateCtxt();
|
|
}
|
|
|
|
template<
|
|
std::size_t Count,
|
|
typename Functions,
|
|
typename... Values
|
|
>
|
|
inline typename std::enable_if<(sizeof...(Values) && sizeof...(Values) < Count), void>::type step(
|
|
sqlite3_context* db,
|
|
int count,
|
|
sqlite3_value** vals,
|
|
Values&&... values
|
|
) {
|
|
typename std::remove_cv<
|
|
typename std::remove_reference<
|
|
typename utility::function_traits<
|
|
typename Functions::first_type
|
|
>::template argument<sizeof...(Values)>
|
|
>::type
|
|
>::type value{};
|
|
get_val_from_db(vals[sizeof...(Values) - 1], value);
|
|
|
|
step<Count, Functions>(db, count, vals, std::forward<Values>(values)..., std::move(value));
|
|
}
|
|
|
|
template<
|
|
std::size_t Count,
|
|
typename Functions,
|
|
typename... Values
|
|
>
|
|
inline typename std::enable_if<(sizeof...(Values) == Count), void>::type step(
|
|
sqlite3_context* db,
|
|
int,
|
|
sqlite3_value**,
|
|
Values&&... values
|
|
) {
|
|
static_cast<Functions*>(sqlite3_user_data(db))->first(std::forward<Values>(values)...);
|
|
}
|
|
|
|
template<
|
|
typename ContextType,
|
|
typename Functions
|
|
>
|
|
inline void final(sqlite3_context* db) {
|
|
auto ctxt = static_cast<AggregateCtxt<ContextType>*>(sqlite3_aggregate_context(db, sizeof(AggregateCtxt<ContextType>)));
|
|
try {
|
|
if(!ctxt) return;
|
|
if(!ctxt->constructed) new(ctxt) AggregateCtxt<ContextType>();
|
|
store_result_in_db(db,
|
|
static_cast<Functions*>(sqlite3_user_data(db))->second(ctxt->obj));
|
|
} catch(sqlite_exception &e) {
|
|
sqlite3_result_error_code(db, e.get_code());
|
|
sqlite3_result_error(db, e.what(), -1);
|
|
} catch(std::exception &e) {
|
|
sqlite3_result_error(db, e.what(), -1);
|
|
} catch(...) {
|
|
sqlite3_result_error(db, "Unknown error", -1);
|
|
}
|
|
if(ctxt && ctxt->constructed)
|
|
ctxt->~AggregateCtxt();
|
|
}
|
|
|
|
template<
|
|
std::size_t Count,
|
|
typename Function,
|
|
typename... Values
|
|
>
|
|
inline typename std::enable_if<(sizeof...(Values) < Count), void>::type scalar(
|
|
sqlite3_context* db,
|
|
int count,
|
|
sqlite3_value** vals,
|
|
Values&&... values
|
|
) {
|
|
typename std::remove_cv<
|
|
typename std::remove_reference<
|
|
typename utility::function_traits<Function>::template argument<sizeof...(Values)>
|
|
>::type
|
|
>::type value{};
|
|
get_val_from_db(vals[sizeof...(Values)], value);
|
|
|
|
scalar<Count, Function>(db, count, vals, std::forward<Values>(values)..., std::move(value));
|
|
}
|
|
|
|
template<
|
|
std::size_t Count,
|
|
typename Function,
|
|
typename... Values
|
|
>
|
|
inline typename std::enable_if<(sizeof...(Values) == Count), void>::type scalar(
|
|
sqlite3_context* db,
|
|
int,
|
|
sqlite3_value**,
|
|
Values&&... values
|
|
) {
|
|
try {
|
|
store_result_in_db(db,
|
|
(*static_cast<Function*>(sqlite3_user_data(db)))(std::forward<Values>(values)...));
|
|
} catch(sqlite_exception &e) {
|
|
sqlite3_result_error_code(db, e.get_code());
|
|
sqlite3_result_error(db, e.what(), -1);
|
|
} catch(std::exception &e) {
|
|
sqlite3_result_error(db, e.what(), -1);
|
|
} catch(...) {
|
|
sqlite3_result_error(db, "Unknown error", -1);
|
|
}
|
|
}
|
|
}
|
|
}
|