#ifndef Py_OBJECT_H
#define Py_OBJECT_H

#include <stdio.h>

#ifdef __cplusplus
extern "C" {
#endif

#include "cpyext_object.h"

#define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))
#define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1)

/*
CPython has this for backwards compatibility with really old extensions, and now
we have it for compatibility with CPython.
*/
#define staticforward static

#define PyObject_HEAD_INIT(type)	\
	{ 1, 0, type },

#define PyVarObject_HEAD_INIT(type, size)	\
	{ PyObject_HEAD_INIT(type) size },

/* Cast argument to PyVarObject* type. */
#define _PyVarObject_CAST(op) ((PyVarObject*)(op))
/* Cast argument to PyObject* type. */
#define _PyObject_CAST(op) ((PyObject*)(op))
#define _PyObject_CAST_CONST(op) ((const PyObject*)(op))

#define Py_REFCNT(ob)           (_PyObject_CAST(ob)->ob_refcnt)
#define Py_TYPE(ob)             (_PyObject_CAST(ob)->ob_type)
#define Py_SIZE(ob)             (_PyVarObject_CAST(ob)->ob_size)

static inline int _Py_IS_TYPE(const PyObject *ob, const PyTypeObject *type) {
    return ob->ob_type == type;
}
#define Py_IS_TYPE(ob, type) _Py_IS_TYPE(_PyObject_CAST_CONST(ob), type)

static inline void _Py_SET_REFCNT(PyObject *ob, Py_ssize_t refcnt) {
    ob->ob_refcnt = refcnt;
}
#define Py_SET_REFCNT(ob, refcnt) _Py_SET_REFCNT(_PyObject_CAST(ob), refcnt)

static inline void _Py_SET_TYPE(PyObject *ob, PyTypeObject *type) {
    ob->ob_type = type;
}
#define Py_SET_TYPE(ob, type) _Py_SET_TYPE(_PyObject_CAST(ob), type)

static inline void _Py_SET_SIZE(PyVarObject *ob, Py_ssize_t size) {
    ob->ob_size = size;
}
#define Py_SET_SIZE(ob, size) _Py_SET_SIZE(_PyVarObject_CAST(ob), size)

PyAPI_FUNC(void) _Py_Dealloc(PyObject *);

#ifdef PYPY_DEBUG_REFCOUNT
/* Slow version, but useful for debugging */
#define Py_INCREF(ob)   (Py_IncRef((PyObject *)(ob)))
#define Py_DECREF(ob)   (Py_DecRef((PyObject *)(ob)))
#define Py_XINCREF(ob)  (Py_IncRef((PyObject *)(ob)))
#define Py_XDECREF(ob)  (Py_DecRef((PyObject *)(ob)))
#else
/* Fast version */
static inline void _Py_INCREF(PyObject *op)
{
    op->ob_refcnt++;
}

#define Py_INCREF(op) _Py_INCREF(_PyObject_CAST(op))

static inline void _Py_DECREF(PyObject *op)
{
    if (--op->ob_refcnt != 0) {
    }
    else {
        _Py_Dealloc(op);
    }
}

#define Py_DECREF(op) _Py_DECREF(_PyObject_CAST(op))

/* Function to use in case the object pointer can be NULL: */
static inline void _Py_XINCREF(PyObject *op)
{
    if (op != NULL) {
        Py_INCREF(op);
    }
}

#define Py_XINCREF(op) _Py_XINCREF(_PyObject_CAST(op))

static inline void _Py_XDECREF(PyObject *op)
{
    if (op != NULL) {
        Py_DECREF(op);
    }
}

#define Py_XDECREF(op) _Py_XDECREF(_PyObject_CAST(op))

PyAPI_FUNC(void) Py_IncRef(PyObject *);
PyAPI_FUNC(void) Py_DecRef(PyObject *);
extern void *_pypy_rawrefcount_w_marker_deallocating;


#define Py_CLEAR(op)                            \
    do {                                        \
        PyObject *_py_tmp = _PyObject_CAST(op); \
        if (_py_tmp != NULL) {                  \
            (op) = NULL;                        \
            Py_DECREF(_py_tmp);                 \
        }                                       \
    } while (0)
#endif

#ifndef Py_LIMITED_API
#define Py_SETREF(op, op2)                      \
    do {                                        \
        PyObject *_py_tmp = _PyObject_CAST(op); \
        (op) = (op2);                           \
        Py_DECREF(_py_tmp);                     \
    } while (0)

#define Py_XSETREF(op, op2)                     \
    do {                                        \
        PyObject *_py_tmp = _PyObject_CAST(op); \
        (op) = (op2);                           \
        Py_XDECREF(_py_tmp);                    \
    } while (0)

#define _Py_NewReference(op)                                        \
    ( ((PyObject *)(op))->ob_refcnt = 1,                            \
      ((PyObject *)(op))->ob_pypy_link = 0 )

#define _Py_ForgetReference(ob) /* nothing */

#endif

#define Py_None (&_Py_NoneStruct)

/* Macro for returning Py_None from a function */
#define Py_RETURN_NONE return Py_INCREF(Py_None), Py_None

/*
Py_NotImplemented is a singleton used to signal that an operation is
not implemented for a given type combination.
*/
#define Py_NotImplemented (&_Py_NotImplementedStruct)

/* Macro for returning Py_NotImplemented from a function */
#define Py_RETURN_NOTIMPLEMENTED \
    return Py_INCREF(Py_NotImplemented), Py_NotImplemented

/* Rich comparison opcodes */
/*
    XXX: Also defined in slotdefs.py
*/
#define Py_LT 0
#define Py_LE 1
#define Py_EQ 2
#define Py_NE 3
#define Py_GT 4
#define Py_GE 5

/* Py3k buffer interface, adapted for PyPy */
    /* Flags for getting buffers */
#define PyBUF_SIMPLE 0
#define PyBUF_WRITABLE 0x0001
/*  we used to include an E, backwards compatible alias  */
#define PyBUF_WRITEABLE PyBUF_WRITABLE
#define PyBUF_FORMAT 0x0004
#define PyBUF_ND 0x0008
#define PyBUF_STRIDES (0x0010 | PyBUF_ND)
#define PyBUF_C_CONTIGUOUS (0x0020 | PyBUF_STRIDES)
#define PyBUF_F_CONTIGUOUS (0x0040 | PyBUF_STRIDES)
#define PyBUF_ANY_CONTIGUOUS (0x0080 | PyBUF_STRIDES)
#define PyBUF_INDIRECT (0x0100 | PyBUF_STRIDES)

#define PyBUF_CONTIG (PyBUF_ND | PyBUF_WRITABLE)
#define PyBUF_CONTIG_RO (PyBUF_ND)

#define PyBUF_STRIDED (PyBUF_STRIDES | PyBUF_WRITABLE)
#define PyBUF_STRIDED_RO (PyBUF_STRIDES)

#define PyBUF_RECORDS (PyBUF_STRIDES | PyBUF_WRITABLE | PyBUF_FORMAT)
#define PyBUF_RECORDS_RO (PyBUF_STRIDES | PyBUF_FORMAT)

#define PyBUF_FULL (PyBUF_INDIRECT | PyBUF_WRITABLE | PyBUF_FORMAT)
#define PyBUF_FULL_RO (PyBUF_INDIRECT | PyBUF_FORMAT)


#define PyBUF_READ  0x100
#define PyBUF_WRITE 0x200
#define PyBUF_SHADOW 0x400
/* end Py3k buffer interface */


PyAPI_FUNC(PyObject*) PyType_FromSpec(PyType_Spec*);
PyAPI_FUNC(PyObject *) PyType_GetModule(struct _typeobject *);
PyAPI_FUNC(void *) PyType_GetModuleState(struct _typeobject *);

/* Flag bits for printing: */
#define Py_PRINT_RAW    1       /* No string quotes etc. */

/*
`Type flags (tp_flags)

These flags are used to extend the type structure in a backwards-compatible
fashion. Extensions can use the flags to indicate (and test) when a given
type structure contains a new feature. The Python core will use these when
introducing new functionality between major revisions (to avoid mid-version
changes in the PYTHON_API_VERSION).

Arbitration of the flag bit positions will need to be coordinated among
all extension writers who publically release their extensions (this will
be fewer than you might expect!)..

Most flags were removed as of Python 3.0 to make room for new flags.  (Some
flags are not for backwards compatibility but to indicate the presence of an
optional feature; these flags remain of course.)

Type definitions should use Py_TPFLAGS_DEFAULT for their tp_flags value.

Code can use PyType_HasFeature(type_ob, flag_value) to test whether the
given type object has a specified feature.
*/

/* Set if the type object is dynamically allocated */
#define Py_TPFLAGS_HEAPTYPE (1L<<9)

/* Set if the type allows subclassing */
#define Py_TPFLAGS_BASETYPE (1L<<10)

/* Set if the type implements the vectorcall protocol (PEP 590) */
#define Py_TPFLAGS_HAVE_VECTORCALL (1UL << 11)
// Backwards compatibility alias for API that was provisional in Python 3.8
#define _Py_TPFLAGS_HAVE_VECTORCALL Py_TPFLAGS_HAVE_VECTORCALL

/* Set if the type is 'ready' -- fully initialized */
#define Py_TPFLAGS_READY (1L<<12)

/* Set while the type is being 'readied', to prevent recursive ready calls */
#define Py_TPFLAGS_READYING (1L<<13)

/* Objects support garbage collection (see objimp.h) */
#define Py_TPFLAGS_HAVE_GC (1L<<14)

/* These two bits are preserved for Stackless Python, next after this is 17 */
#ifdef STACKLESS
#define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION (3L<<15)
#else
#define Py_TPFLAGS_HAVE_STACKLESS_EXTENSION 0
#endif

/* Objects behave like an unbound method */
#define Py_TPFLAGS_METHOD_DESCRIPTOR (1UL << 17)

/* Objects support type attribute cache */
#define Py_TPFLAGS_HAVE_VERSION_TAG   (1L<<18)
#define Py_TPFLAGS_VALID_VERSION_TAG  (1L<<19)

/* Type is abstract and cannot be instantiated */
#define Py_TPFLAGS_IS_ABSTRACT (1L<<20)

/* These flags are used to determine if a type is a subclass. */
#define Py_TPFLAGS_LONG_SUBCLASS        (1UL << 24)
#define Py_TPFLAGS_LIST_SUBCLASS        (1UL << 25)
#define Py_TPFLAGS_TUPLE_SUBCLASS       (1UL << 26)
#define Py_TPFLAGS_BYTES_SUBCLASS       (1UL << 27)
#define Py_TPFLAGS_UNICODE_SUBCLASS     (1UL << 28)
#define Py_TPFLAGS_DICT_SUBCLASS        (1UL << 29)
#define Py_TPFLAGS_BASE_EXC_SUBCLASS    (1UL << 30)
#define Py_TPFLAGS_TYPE_SUBCLASS        (1UL << 31)


/* These are conceptually the same as the flags above, but they are
   PyPy-specific and are stored inside tp_pypy_flags */
#define Py_TPPYPYFLAGS_FLOAT_SUBCLASS (1L<<0)

    
#define Py_TPFLAGS_DEFAULT  ( \
                 Py_TPFLAGS_HAVE_STACKLESS_EXTENSION | \
                 Py_TPFLAGS_HAVE_VERSION_TAG | \
                0)

/* NOTE: The following flags reuse lower bits (removed as part of the
 * Python 3.0 transition). */

/* Type structure has tp_finalize member (3.4) */
#define Py_TPFLAGS_HAVE_FINALIZE (1UL << 0)

PyAPI_FUNC(long) PyType_GetFlags(PyTypeObject*);

#ifdef Py_LIMITED_API
#define PyType_HasFeature(t,f)  ((PyType_GetFlags(t) & (f)) != 0)
#else
#define PyType_HasFeature(t,f)  (((t)->tp_flags & (f)) != 0)
#endif
#define PyType_FastSubclass(t,f)  PyType_HasFeature(t,f)

#define _PyPy_Type_FastSubclass(t,f) (((t)->tp_pypy_flags & (f)) != 0)

#if !defined(Py_LIMITED_API)
PyAPI_FUNC(void*) PyType_GetSlot(PyTypeObject*, int);
#endif
    
#define PyType_Check(op) \
    PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_TYPE_SUBCLASS)
#define PyType_CheckExact(op) (Py_TYPE(op) == &PyType_Type)


PyAPI_FUNC(const char *) _PyType_Name(PyTypeObject *);


/* objimpl.h ----------------------------------------------*/
#define PyObject_New(type, typeobj) \
		( (type *) _PyObject_New(typeobj) )
#define PyObject_NewVar(type, typeobj, n) \
		( (type *) _PyObject_NewVar((typeobj), (n)) )

#define _PyObject_SIZE(typeobj) ( (typeobj)->tp_basicsize )
#define _PyObject_VAR_SIZE(typeobj, nitems)	\
	(size_t)				\
	( ( (typeobj)->tp_basicsize +		\
	    (nitems)*(typeobj)->tp_itemsize +	\
	    (SIZEOF_VOID_P - 1)			\
	  ) & ~(SIZEOF_VOID_P - 1)		\
	)

        
#define PyObject_INIT(op, typeobj) \
    ( Py_TYPE(op) = (typeobj), ((PyObject *)(op))->ob_refcnt = 1,\
      ((PyObject *)(op))->ob_pypy_link = 0, (op) )
#define PyObject_INIT_VAR(op, typeobj, size) \
    ( Py_SIZE(op) = (size), PyObject_INIT((op), (typeobj)) )


PyAPI_FUNC(PyObject *) PyType_GenericAlloc(PyTypeObject *, Py_ssize_t);

/*
#define PyObject_NEW(type, typeobj) \
( (type *) PyObject_Init( \
	(PyObject *) PyObject_MALLOC( _PyObject_SIZE(typeobj) ), (typeobj)) )
*/
#define PyObject_NEW PyObject_New
#define PyObject_NEW_VAR PyObject_NewVar

/*
#define PyObject_NEW_VAR(type, typeobj, n) \
( (type *) PyObject_InitVar( \
      (PyVarObject *) PyObject_MALLOC(_PyObject_VAR_SIZE((typeobj),(n)) ),\
      (typeobj), (n)) )
*/

#define PyObject_GC_New(type, typeobj) \
                ( (type *) _PyObject_GC_New(typeobj) )
#define PyObject_GC_NewVar(type, typeobj, size) \
                ( (type *) _PyObject_GC_NewVar(typeobj, size) )

/* A dummy PyGC_Head, just to please some tests. Don't use it! */
typedef union _gc_head {
    char dummy;
} PyGC_Head;

/* dummy GC macros */
#define _PyGC_FINALIZED(o) 1
#define PyType_IS_GC(t) PyType_HasFeature((t), Py_TPFLAGS_HAVE_GC)

#define PyObject_GC_Track(o)      do { } while(0)
#define PyObject_GC_UnTrack(o)    do { } while(0)
#define _PyObject_GC_TRACK(o)     do { } while(0)
#define _PyObject_GC_UNTRACK(o)   do { } while(0)

/* Utility macro to help write tp_traverse functions.
 * To use this macro, the tp_traverse function must name its arguments
 * "visit" and "arg".  This is intended to keep tp_traverse functions
 * looking as much alike as possible.
 */
#define Py_VISIT(op)                                                    \
        do {                                                            \
                if (op) {                                               \
                        int vret = visit((PyObject *)(op), arg);        \
                        if (vret)                                       \
                                return vret;                            \
                }                                                       \
        } while (0)

#define PyObject_TypeCheck(ob, tp) \
    (Py_TYPE(ob) == (tp) || PyType_IsSubtype(Py_TYPE(ob), (tp)))

#define Py_TRASHCAN_SAFE_BEGIN(pyObj) do {
#define Py_TRASHCAN_SAFE_END(pyObj)   ; } while(0);
/* note: the ";" at the start of Py_TRASHCAN_SAFE_END is needed
   if the code has a label in front of the macro call */

/* Copied from CPython ----------------------------- */
PyAPI_FUNC(int) PyObject_AsReadBuffer(PyObject *, const void **, Py_ssize_t *);
PyAPI_FUNC(int) PyObject_AsWriteBuffer(PyObject *, void **, Py_ssize_t *);
PyAPI_FUNC(int) PyObject_CheckReadBuffer(PyObject *);
PyAPI_FUNC(void *) PyBuffer_GetPointer(Py_buffer *view, Py_ssize_t *indices);
/* Get the memory area pointed to by the indices for the buffer given.
   Note that view->ndim is the assumed size of indices
*/

PyAPI_FUNC(int) PyBuffer_ToContiguous(void *buf, Py_buffer *view,
                                   Py_ssize_t len, char fort);
PyAPI_FUNC(int) PyBuffer_FromContiguous(Py_buffer *view, void *buf,
                                     Py_ssize_t len, char fort);
/* Copy len bytes of data from the contiguous chunk of memory
   pointed to by buf into the buffer exported by obj.  Return
   0 on success and return -1 and raise a PyBuffer_Error on
   error (i.e. the object does not have a buffer interface or
   it is not working).

   If fort is 'F' and the object is multi-dimensional,
   then the data will be copied into the array in
   Fortran-style (first dimension varies the fastest).  If
   fort is 'C', then the data will be copied into the array
   in C-style (last dimension varies the fastest).  If fort
   is 'A', then it does not matter and the copy will be made
   in whatever way is more efficient.

*/


/* on CPython, these are in objimpl.h */

PyAPI_FUNC(void) PyObject_Free(void *);
PyAPI_FUNC(void) PyObject_GC_Del(void *);

#define PyObject_MALLOC         PyObject_Malloc
#define PyObject_REALLOC        PyObject_Realloc
#define PyObject_FREE           PyObject_Free
#define PyObject_Del            PyObject_Free
#define PyObject_DEL            PyObject_Free

PyAPI_FUNC(PyObject *) _PyObject_New(PyTypeObject *);
PyAPI_FUNC(PyVarObject *) _PyObject_NewVar(PyTypeObject *, Py_ssize_t);
PyAPI_FUNC(PyObject *) _PyObject_GC_Malloc(size_t);
PyAPI_FUNC(PyObject *) _PyObject_GC_New(PyTypeObject *);
PyAPI_FUNC(PyVarObject *) _PyObject_GC_NewVar(PyTypeObject *, Py_ssize_t);

PyAPI_FUNC(PyObject *) PyObject_Init(PyObject *, PyTypeObject *);
PyAPI_FUNC(PyVarObject *) PyObject_InitVar(PyVarObject *,
                                           PyTypeObject *, Py_ssize_t);

#ifndef Py_LIMITED_API
PyAPI_FUNC(int) PyObject_CallFinalizerFromDealloc(PyObject *);
#endif

/*
 * On CPython with Py_REF_DEBUG these use _PyRefTotal, _Py_NegativeRefcount,
 * _Py_GetRefTotal, ...
 * So far we ignore Py_REF_DEBUG
 */

#define _Py_INC_REFTOTAL
#define _Py_DEC_REFTOTAL
#define _Py_REF_DEBUG_COMMA
#define _Py_CHECK_REFCNT(OP)    /* a semicolon */;


/* PyPy internal ----------------------------------- */
PyAPI_FUNC(int) PyPyType_Register(PyTypeObject *);
#define PyObject_Length PyObject_Size
#define _PyObject_GC_Del PyObject_GC_Del
PyAPI_FUNC(void) _PyPy_subtype_dealloc(PyObject *);
PyAPI_FUNC(void) _PyPy_object_dealloc(PyObject *);


#ifdef __cplusplus
}
#endif
#endif /* !Py_OBJECT_H */
