#include "pclassobject.h"
#include "ptupleobject.h"


DEFINEFN
vinfo_t* PsycoMethod_New(PyObject* func, vinfo_t* self, PyObject* cls)
{
	vinfo_t* result = vinfo_new(VirtualTime_New(&psyco_computed_method));
	
	result->array = array_new(METHOD_TOTAL);
	result->array->items[iOB_TYPE] =
		vinfo_new(CompileTime_New((long)(&PyMethod_Type)));
        
        Py_INCREF(func);
	result->array->items[iMETHOD_IM_FUNC] =
		vinfo_new(CompileTime_NewSk(sk_new((long) func, SkFlagPyObj)));
        
	vinfo_incref(self);
	result->array->items[iMETHOD_IM_SELF] = self;
        
        Py_INCREF(cls);
	result->array->items[iMETHOD_IM_CLASS] =
		vinfo_new(CompileTime_NewSk(sk_new((long) cls, SkFlagPyObj)));
        
	return result;
}


static bool compute_method(PsycoObject* po, vinfo_t* methobj)
{
	vinfo_t* newobj;
	vinfo_t* im_func;
	vinfo_t* im_self;
	vinfo_t* im_class;
	
	/* get the fields from the Python object 'methobj' */
	im_func = vinfo_getitem(methobj, iMETHOD_IM_FUNC);
	if (im_func == NULL)
		return false;
	im_self = vinfo_getitem(methobj, iMETHOD_IM_SELF);
	if (im_self == NULL)
		return false;
	im_class = vinfo_getitem(methobj, iMETHOD_IM_CLASS);
	if (im_class == NULL)
		return false;

	/* call PyMethod_New() */
	newobj = psyco_generic_call(po, PyMethod_New,
				    CfPure|CfReturnRef|CfPyErrIfNull,
				    "vvv", im_func, im_self, im_class);
	if (newobj == NULL)
		return false;

	/* move the resulting non-virtual Python object back into 'methobj' */
	vinfo_move(po, methobj, newobj);
	return true;
}

static PyObject* direct_compute_method(vinfo_t* methobj, char* data)
{
	PyObject* im_func;
	PyObject* im_self;
	PyObject* im_class;
	PyObject* result = NULL;

	im_func = direct_xobj_vinfo(
			vinfo_getitem(methobj, iMETHOD_IM_FUNC), data);
	im_self = direct_xobj_vinfo(
			vinfo_getitem(methobj, iMETHOD_IM_SELF), data);
	im_class = direct_xobj_vinfo(
			vinfo_getitem(methobj, iMETHOD_IM_CLASS), data);
	
	if (!PyErr_Occurred() && im_func != NULL)
		result = PyMethod_New(im_func, im_self, im_class);
	
	Py_XDECREF(im_class);
	Py_XDECREF(im_self);
	Py_XDECREF(im_func);
	return result;
}


DEFINEVAR source_virtual_t psyco_computed_method;


 /***************************************************************/
  /*** instance method objects meta-implementation             ***/


DEFINEFN
vinfo_t* pinstancemethod_call(PsycoObject* po, vinfo_t* methobj,
                              vinfo_t* arg, vinfo_t* kw)
{
	vinfo_t* im_func;
	vinfo_t* im_self;
	vinfo_t* result;
	condition_code_t cc;
	
	/* get the 'im_self' field from the Python object 'methobj' */
	im_self = psyco_get_const(po, methobj, METHOD_im_self);
	if (im_self == NULL)
		return NULL;

	cc = object_non_null(po, im_self);
	if (cc == CC_ERROR)  /* error or more likely promotion */
		return NULL;
	
	if (!runtime_condition_t(po, cc)) {
		/* Unbound methods, XXX implement me */
		goto fallback;
	}
	else
	{
		int i, argcount;
		vinfo_t* newarg;
		if (PycException_Occurred(po))
			return NULL;
		
		argcount = PsycoTuple_Load(arg);
		if (argcount < 0)
			goto fallback;
		
		newarg = PsycoTuple_New(argcount+1, NULL);
		vinfo_incref(im_self);
		PsycoTuple_GET_ITEM(newarg, 0) = im_self;
		for (i = 0; i < argcount; i++) {
			vinfo_t* v =  PsycoTuple_GET_ITEM(arg, i);
			vinfo_incref(v);
			PsycoTuple_GET_ITEM(newarg, i+1) = v;
		}
		arg = newarg;
	}

	im_func = psyco_get_const(po, methobj, METHOD_im_func);
	if (im_func == NULL)
		result = NULL;
	else
		result = PsycoObject_Call(po, im_func, arg, kw);
	vinfo_decref(arg, po);
	return result;

  fallback:
#if NEW_STYLE_TYPES   /* Python >= 2.2b1 */
	return psyco_generic_call(po, PyMethod_Type.tp_call,
				  CfReturnRef|CfPyErrIfNull,
				  "vvv", methobj, arg, kw);
#else
        /* PyMethod_Type.tp_call == NULL... */
        return psyco_generic_call(po, PyEval_CallObjectWithKeywords,
                                  CfReturnRef|CfPyErrIfNull,
                                  "vvv", methobj, arg, kw);
#endif
}

 /***************************************************************/
  /*** instances and classes                                   ***/

DEF_KNOWN_RET_TYPE_3(pinstance_new, PyInstance_New,
		     CfReturnRef|CfPyErrIfNull, &PyInstance_Type)


INITIALIZATIONFN
void psy_classobject_init(void)
{
#if NEW_STYLE_TYPES   /* Python >= 2.2b1 */
	Psyco_DefineMeta(PyMethod_Type.tp_call, pinstancemethod_call);
#endif
	Psyco_DefineMeta(PyInstance_New,	pinstance_new);

        INIT_SVIRTUAL(psyco_computed_method, compute_method,
		      direct_compute_method,
                      (1 << iMETHOD_IM_FUNC) |
                      (1 << iMETHOD_IM_SELF) |
                      (1 << iMETHOD_IM_CLASS),
                      0, 0);
}