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pyc_object.h
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pyc_object.h
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#ifndef _PYC_OBJECT_H
#define _PYC_OBJECT_H
#include <typeinfo>
template <class _Obj>
class PycRef {
public:
PycRef() noexcept : m_obj() { }
PycRef(_Obj* obj) noexcept : m_obj(obj)
{
if (m_obj)
m_obj->addRef();
}
PycRef(const PycRef<_Obj>& obj) noexcept : m_obj(obj.m_obj)
{
if (m_obj)
m_obj->addRef();
}
PycRef(PycRef<_Obj>&& obj) noexcept : m_obj(obj.m_obj)
{
obj.m_obj = nullptr;
}
~PycRef()
{
if (m_obj)
m_obj->delRef();
}
PycRef<_Obj>& operator=(_Obj* obj)
{
if (obj)
obj->addRef();
if (m_obj)
m_obj->delRef();
m_obj = obj;
return *this;
}
PycRef<_Obj>& operator=(const PycRef<_Obj>& obj)
{
if (obj.m_obj)
obj.m_obj->addRef();
if (m_obj)
m_obj->delRef();
m_obj = obj.m_obj;
return *this;
}
PycRef<_Obj>& operator=(PycRef<_Obj>&& obj) noexcept
{
m_obj = obj.m_obj;
obj.m_obj = nullptr;
return *this;
}
bool operator==(_Obj* obj) const { return m_obj == obj; }
bool operator==(const PycRef<_Obj>& obj) const { return m_obj == obj.m_obj; }
bool operator!=(_Obj* obj) const { return m_obj != obj; }
bool operator!=(const PycRef<_Obj>& obj) const { return m_obj != obj.m_obj; }
_Obj& operator*() const { return *m_obj; }
_Obj* operator->() const { return m_obj; }
operator _Obj*() const { return m_obj; }
inline int type() const;
template <class _Cast>
PycRef<_Cast> try_cast() const { return dynamic_cast<_Cast*>(m_obj); }
template <class _Cast>
PycRef<_Cast> cast() const
{
_Cast* result = dynamic_cast<_Cast*>(m_obj);
if (!result)
throw std::bad_cast();
return result;
}
bool isIdent(const _Obj* obj) const { return m_obj == obj; }
private:
_Obj* m_obj;
};
class PycData;
class PycModule;
/* Please only hold PycObjects inside PycRefs! */
class PycObject {
public:
enum Type {
// From the Python Marshallers
TYPE_NULL = '0', // Python 1.0 ->
TYPE_NONE = 'N', // Python 1.0 ->
TYPE_FALSE = 'F', // Python 2.3 ->
TYPE_TRUE = 'T', // Python 2.3 ->
TYPE_STOPITER = 'S', // Python 2.2 ->
TYPE_ELLIPSIS = '.', // Python 1.4 ->
TYPE_INT = 'i', // Python 1.0 ->
TYPE_INT64 = 'I', // Python 1.5 - 3.3
TYPE_FLOAT = 'f', // Python 1.0 ->
TYPE_BINARY_FLOAT = 'g', // Python 2.5 ->
TYPE_COMPLEX = 'x', // Python 1.4 ->
TYPE_BINARY_COMPLEX = 'y', // Python 2.5 ->
TYPE_LONG = 'l', // Python 1.0 ->
TYPE_STRING = 's', // Python 1.0 ->
TYPE_INTERNED = 't', // Python 2.4 - 2.7, 3.4 ->
TYPE_STRINGREF = 'R', // Python 2.4 - 2.7
TYPE_OBREF = 'r', // Python 3.4 ->
TYPE_TUPLE = '(', // Python 1.0 ->
TYPE_LIST = '[', // Python 1.0 ->
TYPE_DICT = '{', // Python 1.0 ->
TYPE_CODE = 'c', // Python 1.3 ->
TYPE_CODE2 = 'C', // Python 1.0 - 1.2
TYPE_UNICODE = 'u', // Python 1.6 ->
TYPE_UNKNOWN = '?', // Python 1.0 ->
TYPE_SET = '<', // Python 2.5 ->
TYPE_FROZENSET = '>', // Python 2.5 ->
TYPE_ASCII = 'a', // Python 3.4 ->
TYPE_ASCII_INTERNED = 'A', // Python 3.4 ->
TYPE_SMALL_TUPLE = ')', // Python 3.4 ->
TYPE_SHORT_ASCII = 'z', // Python 3.4 ->
TYPE_SHORT_ASCII_INTERNED = 'Z', // Python 3.4 ->
};
PycObject(int type = TYPE_UNKNOWN) : m_refs(0), m_type(type) { }
virtual ~PycObject() { }
int type() const { return m_type; }
virtual bool isEqual(PycRef<PycObject> obj) const
{
return obj.isIdent(this);
}
virtual void load(PycData*, PycModule*) { }
private:
int m_refs;
protected:
int m_type;
public:
void addRef() { ++m_refs; }
void delRef() { if (--m_refs == 0) delete this; }
};
template <class _Obj>
int PycRef<_Obj>::type() const
{
return m_obj ? m_obj->type() : PycObject::TYPE_NULL;
}
PycRef<PycObject> CreateObject(int type);
PycRef<PycObject> LoadObject(PycData* stream, PycModule* mod);
/* Static Singleton objects */
extern PycRef<PycObject> Pyc_None;
extern PycRef<PycObject> Pyc_Ellipsis;
extern PycRef<PycObject> Pyc_StopIteration;
extern PycRef<PycObject> Pyc_False;
extern PycRef<PycObject> Pyc_True;
#endif