102 строки
4.1 KiB
C++
102 строки
4.1 KiB
C++
#include "errors.h"
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#include <sqlite3.h>
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#include <utility>
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#include <tuple>
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#include <type_traits>
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namespace sqlite {
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namespace detail {
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template<class>
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using void_t = void;
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template<class T, class = void>
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struct is_callable : std::false_type {};
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template<class Functor, class ...Arguments>
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struct is_callable<Functor(Arguments...), void_t<decltype(std::declval<Functor>()(std::declval<Arguments>()...))>> : std::true_type {};
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template<class Functor, class ...Functors>
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class FunctorOverload: public Functor, public FunctorOverload<Functors...> {
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public:
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template<class Functor1, class ...Remaining>
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FunctorOverload(Functor1 &&functor, Remaining &&... remaining):
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Functor(std::forward<Functor1>(functor)),
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FunctorOverload<Functors...>(std::forward<Remaining>(remaining)...) {}
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using Functor::operator();
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using FunctorOverload<Functors...>::operator();
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};
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template<class Functor>
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class FunctorOverload<Functor>: public Functor {
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public:
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template<class Functor1>
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FunctorOverload(Functor1 &&functor):
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Functor(std::forward<Functor1>(functor)) {}
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using Functor::operator();
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};
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template<class Functor>
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class WrapIntoFunctor: public Functor {
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public:
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template<class Functor1>
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WrapIntoFunctor(Functor1 &&functor):
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Functor(std::forward<Functor1>(functor)) {}
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using Functor::operator();
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};
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template<class ReturnType, class ...Arguments>
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class WrapIntoFunctor<ReturnType(*)(Arguments...)> {
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ReturnType(*ptr)(Arguments...);
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public:
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WrapIntoFunctor(ReturnType(*ptr)(Arguments...)): ptr(ptr) {}
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ReturnType operator()(Arguments... arguments) { return (*ptr)(std::forward<Arguments>(arguments)...); }
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};
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inline void store_error_log_data_pointer(std::shared_ptr<void> ptr) {
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static std::shared_ptr<void> stored;
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stored = std::move(ptr);
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}
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template<class T>
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std::shared_ptr<typename std::decay<T>::type> make_shared_inferred(T &&t) {
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return std::make_shared<typename std::decay<T>::type>(std::forward<T>(t));
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}
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}
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template<class Handler>
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typename std::enable_if<!detail::is_callable<Handler(const sqlite_exception&)>::value>::type
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error_log(Handler &&handler);
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template<class Handler>
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typename std::enable_if<detail::is_callable<Handler(const sqlite_exception&)>::value>::type
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error_log(Handler &&handler);
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template<class ...Handler>
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typename std::enable_if<sizeof...(Handler)>=2>::type
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error_log(Handler &&...handler) {
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return error_log(detail::FunctorOverload<detail::WrapIntoFunctor<typename std::decay<Handler>::type>...>(std::forward<Handler>(handler)...));
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}
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template<class Handler>
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typename std::enable_if<!detail::is_callable<Handler(const sqlite_exception&)>::value>::type
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error_log(Handler &&handler) {
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return error_log(std::forward<Handler>(handler), [](const sqlite_exception&) {});
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}
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template<class Handler>
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typename std::enable_if<detail::is_callable<Handler(const sqlite_exception&)>::value>::type
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error_log(Handler &&handler) {
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auto ptr = detail::make_shared_inferred([handler = std::forward<Handler>(handler)](int error_code, const char *errstr) mutable {
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switch(error_code & 0xFF) {
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#define SQLITE_MODERN_CPP_ERROR_CODE(NAME,name,derived) \
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case SQLITE_ ## NAME: switch(error_code) { \
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derived \
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default: handler(errors::name(errstr, "", error_code)); \
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};break;
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#define SQLITE_MODERN_CPP_ERROR_CODE_EXTENDED(BASE,SUB,base,sub) \
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case SQLITE_ ## BASE ## _ ## SUB: \
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handler(errors::base ## _ ## sub(errstr, "", error_code)); \
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break;
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#include "lists/error_codes.h"
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#undef SQLITE_MODERN_CPP_ERROR_CODE_EXTENDED
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#undef SQLITE_MODERN_CPP_ERROR_CODE
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default: handler(sqlite_exception(errstr, "", error_code)); \
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}
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});
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sqlite3_config(SQLITE_CONFIG_LOG, (void(*)(void*,int,const char*))[](void *functor, int error_code, const char *errstr) {
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(*static_cast<decltype(ptr.get())>(functor))(error_code, errstr);
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}, ptr.get());
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detail::store_error_log_data_pointer(std::move(ptr));
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}
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}
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