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