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// Copyright (C) 2016 Jochen Becher
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#pragma once
#include "parameters.h"
#include "qmt/infrastructure/qmtassert.h"
#include <exception>
#include <typeinfo>
#include <type_traits>
#include <QString>
#include <QHash>
namespace qark {
class UnregisteredType : public std::exception
{
};
class AbstractType : public std::exception
{
};
namespace registry {
// we use a template to allow definition of static variables in header
template<int N>
class TypeNameMaps
{
public:
typedef QHash<QString, QString> MapType;
static MapType &nameToUidMap() { return *typeidNameToUidMap; }
static MapType &uidToNameMap() { return *typeidUidToNameMap; }
#if !defined(QT_NO_DEBUG)
static bool hasNameToUidMap() { return typeidNameToUidMap != nullptr; }
static bool hasUidToNameMap() { return typeidUidToNameMap != nullptr; }
#endif
protected:
static void init()
{
static bool initialized = false;
static MapType nameToUidMap;
static MapType uidToNameMap;
if (!initialized) {
typeidNameToUidMap = &nameToUidMap;
typeidUidToNameMap = &uidToNameMap;
initialized = true;
}
}
private:
static MapType *typeidNameToUidMap;
static MapType *typeidUidToNameMap;
};
template<int N>
typename TypeNameMaps<N>::MapType *TypeNameMaps<N>::typeidNameToUidMap;
template<int N>
typename TypeNameMaps<N>::MapType *TypeNameMaps<N>::typeidUidToNameMap;
template<class T>
class TypeNameRegistry : public TypeNameMaps<0>
{
typedef TypeNameMaps<0> Base;
static int staticInit;
static int init(const QString &name)
{
Base::init();
QMT_CHECK(!Base::nameToUidMap().contains(QLatin1String(typeid(T).name()))
|| Base::nameToUidMap().value(QLatin1String(typeid(T).name())) == name);
QMT_CHECK(!Base::uidToNameMap().contains(name)
|| Base::uidToNameMap().value(name) == QLatin1String(typeid(T).name()));
Base::nameToUidMap().insert(QLatin1String(typeid(T).name()), name);
Base::uidToNameMap().insert(name, QLatin1String(typeid(T).name()));
return 0;
}
};
template<class Archive, class BASE>
class TypeRegistry
{
public:
class TypeInfo
{
public:
typedef Archive &(*SaveFuncType)(Archive &, BASE * const &p);
typedef Archive &(*LoadFuncType)(Archive &, BASE * &p);
explicit TypeInfo()
{
}
explicit TypeInfo(SaveFuncType sfunc, LoadFuncType lfunc)
: m_saveFunc(sfunc),
m_loadFunc(lfunc)
{
}
bool operator==(const TypeInfo &rhs) const
{
return m_saveFunc == rhs.m_saveFunc && m_loadFunc == rhs.m_loadFunc;
}
SaveFuncType m_saveFunc = nullptr;
LoadFuncType m_loadFunc = nullptr;
};
typedef QHash<QString, TypeInfo> MapType;
static MapType &map() { return *m_map; }
#if !defined(QT_NO_DEBUG)
static bool hasMap() { return m_map != nullptr; }
#endif
protected:
static void init() {
static bool initialized = false;
static MapType theMap;
if (!initialized) {
m_map = &theMap;
initialized = true;
}
}
private:
static MapType *m_map;
};
template<class Archive, class BASE>
typename TypeRegistry<Archive, BASE>::MapType *TypeRegistry<Archive,BASE>::m_map;
template<class Archive, class BASE, class DERIVED>
class DerivedTypeRegistry : public TypeRegistry<Archive, BASE>
{
typedef TypeRegistry<Archive, BASE> Base;
typedef Archive &(*SaveFuncType)(Archive &, BASE * const &);
typedef Archive &(*LoadFuncType)(Archive &, BASE * &);
static int staticInit;
static int init(SaveFuncType sfunc, LoadFuncType lfunc)
{
Base::init();
QMT_CHECK(!Base::map().contains(QLatin1String(typeid(DERIVED).name()))
|| Base::map().value(QLatin1String(typeid(DERIVED).name())) == typename Base::TypeInfo(sfunc, lfunc));
Base::map().insert(QLatin1String(typeid(DERIVED).name()), typename Base::TypeInfo(sfunc, lfunc));
return 0;
}
};
template<class Archive, class BASE, class DERIVED>
Archive &savePointer(Archive &ar, BASE * const &p)
{
DERIVED &t = dynamic_cast<DERIVED &>(*p);
save(ar, t, Parameters());
return ar;
}
template<class Archive, class BASE, class DERIVED>
Archive &loadPointer(Archive &ar, BASE *&p)
{
auto t = new DERIVED();
load(ar, *t, Parameters());
p = t;
return ar;
}
template<class Archive, class T>
typename std::enable_if_t<!std::is_abstract<T>::value, void> loadNonVirtualPointer(
Archive &archive, T *&p)
{
registry::loadPointer<Archive, T, T>(archive, p);
}
template<class Archive, class T>
typename std::enable_if_t<std::is_abstract<T>::value, void> loadNonVirtualPointer(
Archive &archive, T *&p)
{
(void) archive;
(void) p;
throw AbstractType();
}
inline QString demangleTypename(const char *mangledName)
{
// TODO convert compiler specific mangledName into human readable type name
return QLatin1String(mangledName);
}
inline QString flattenTypename(const char *typeName)
{
// convert C++ type name into simple identifier (no extra characters)
return QString(QLatin1String(typeName)).replace(QChar(QLatin1Char(':')), QLatin1String("-"));
}
} // namespace registry
template<class T>
QString typeUid()
{
#if !defined(QT_NO_DEBUG) // avoid warning about unused function ::hasNameToUidMap in Qt >= 5.5
QMT_CHECK_X((registry::TypeNameRegistry<T>::hasNameToUidMap()),
"typeUid<T>()", "type maps are not correctly initialized");
QMT_CHECK_X((registry::TypeNameRegistry<T>::nameToUidMap().contains(QLatin1String(typeid(T).name()))),
"typeUid<T>()",
qPrintable(QString(QLatin1String("type with typeid %1 is not registered. Use QARK_REGISTER_TYPE or QARK_REGISTER_TYPE_NAME.")).arg(registry::demangleTypename(typeid(T).name()))));
#endif
return registry::TypeNameRegistry<T>::nameToUidMap().value(QLatin1String(typeid(T).name()));
}
template<class T>
QString typeUid(const T &t)
{
Q_UNUSED(t) // avoid warning in some compilers
#if !defined(QT_NO_DEBUG) // avoid warning about unused function ::hasNameToUidMap in Qt >= 5.5
QMT_CHECK_X((registry::TypeNameRegistry<T>::hasNameToUidMap()),
"typeUid<T>()", "type maps are not correctly initialized");
QMT_CHECK_X((registry::TypeNameRegistry<T>::nameToUidMap().contains(QLatin1String(typeid(t).name()))),
"typeUid<T>()",
qPrintable(QString(QLatin1String("type with typeid %1 is not registered. Use QARK_REGISTER_TYPE or QARK_REGISTER_TYPE_NAME.")).arg(registry::demangleTypename(typeid(t).name()))));
#endif
return registry::TypeNameRegistry<T>::nameToUidMap().value(QLatin1String(typeid(t).name()));
}
template<class Archive, class T>
typename registry::TypeRegistry<Archive, T>::TypeInfo typeInfo(const T &t)
{
Q_UNUSED(t) // avoid warning in some compilers
#if !defined(QT_NO_DEBUG) // avoid warning about unused function ::hasNameToUidMap in Qt >= 5.5
QMT_CHECK_X((registry::TypeRegistry<Archive,T>::hasMap()),
qPrintable(QString(QLatin1String("TypeRegistry<Archive, %1>::typeInfo(const T&)")).arg(typeUid<T>())),
qPrintable(QString(QLatin1String("%1 is not a registered base class. Declare your derived classes with QARK_REGISTER_DERIVED_CLASS.")).arg(typeUid<T>())));
#endif
return registry::TypeRegistry<Archive,T>::map()[QLatin1String(typeid(t).name())];
}
template<class Archive, class T>
typename registry::TypeRegistry<Archive,T>::TypeInfo typeInfo(const QString &uid)
{
#if !defined(QT_NO_DEBUG) // avoid warning about unused function ::hasNameToUidMap in Qt >= 5.5
QMT_CHECK_X((registry::TypeNameRegistry<T>::hasUidToNameMap()),
"typeInfo<T>(const QString &)", "type maps are not correctly initialized");
QMT_CHECK_X((registry::TypeRegistry<Archive,T>::hasMap()),
qPrintable(QString(QLatin1String("TypeRegistry<Archive, %1>::typeInfo(const QString &)")).arg(typeUid<T>())),
qPrintable(QString(QLatin1String("%1 is not a registered base class. Declare your derived classes with QARK_REGISTER_DERIVED_CLASS.")).arg(typeUid<T>())));
#endif
return registry::TypeRegistry<Archive,T>::map().value(registry::TypeNameRegistry<T>::uidToNameMap().value(uid));
}
} // namespace qark
#define QARK_TYPE_STRING(T) #T
#define QARK_REGISTER_TYPE_NAME(T, NAME) \
template<> \
int qark::registry::TypeNameRegistry<T>::staticInit = qark::registry::TypeNameRegistry<T>::init(QLatin1String(NAME));
#define QARK_REGISTER_TYPE(T) \
template<> \
int qark::registry::TypeNameRegistry<T>::staticInit = qark::registry::TypeNameRegistry<T>::init(qark::registry::flattenTypename(QARK_TYPE_STRING(T)));
#define QARK_REGISTER_DERIVED_CLASS(INARCHIVE, OUTARCHIVE, DERIVED, BASE) \
template<> \
int qark::registry::DerivedTypeRegistry<INARCHIVE,BASE,DERIVED>::staticInit = \
qark::registry::DerivedTypeRegistry<INARCHIVE, BASE, DERIVED>::init(0, qark::registry::loadPointer<INARCHIVE, BASE, DERIVED>); \
template<> \
int qark::registry::DerivedTypeRegistry<OUTARCHIVE, BASE, DERIVED>::staticInit = \
qark::registry::DerivedTypeRegistry<OUTARCHIVE, BASE, DERIVED>::init(qark::registry::savePointer<OUTARCHIVE, BASE, DERIVED>, 0); \
template<> \
int qark::registry::DerivedTypeRegistry<OUTARCHIVE, std::add_const_t<BASE>, std::add_const_t<DERIVED>>::staticInit = \
qark::registry::DerivedTypeRegistry<OUTARCHIVE, std::add_const_t<BASE>, std::add_const_t<DERIVED>>:: \
init(qark::registry::savePointer<OUTARCHIVE, std::add_const_t<BASE>, std::add_const_t<DERIVED>>, 0);
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