bpy_rna.c

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/*
 * $Id: bpy_rna.c 39075 2011-08-05 16:29:38Z campbellbarton $
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Campbell Barton
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <Python.h>

#include <stddef.h>
#include <float.h> /* FLT_MIN/MAX */

#include "RNA_types.h"

#include "bpy_rna.h"
#include "bpy_rna_anim.h"
#include "bpy_props.h"
#include "bpy_util.h"
#include "bpy_rna_callback.h"
#include "bpy_intern_string.h"

#ifdef USE_PYRNA_INVALIDATE_WEAKREF
#include "MEM_guardedalloc.h"
#endif

#include "BLI_dynstr.h"
#include "BLI_string.h"
#include "BLI_listbase.h"
#include "BLI_math_rotation.h"
#include "BLI_utildefines.h"

#ifdef USE_PYRNA_INVALIDATE_WEAKREF
#include "BLI_ghash.h"
#endif

#include "RNA_enum_types.h"
#include "RNA_define.h" /* RNA_def_property_free_identifier */
#include "RNA_access.h"

#include "MEM_guardedalloc.h"

#include "BKE_idcode.h"
#include "BKE_context.h"
#include "BKE_global.h" /* evil G.* */
#include "BKE_report.h"
#include "BKE_idprop.h"

#include "BKE_animsys.h"
#include "BKE_fcurve.h"

#include "../generic/IDProp.h" /* for IDprop lookups */
#include "../generic/py_capi_utils.h"

#define USE_PEDANTIC_WRITE
#define USE_MATHUTILS
#define USE_STRING_COERCE

static PyObject* pyrna_struct_Subtype(PointerRNA *ptr);
static PyObject *pyrna_prop_collection_values(BPy_PropertyRNA *self);

int pyrna_struct_validity_check(BPy_StructRNA *pysrna)
{
        if(pysrna->ptr.type)
                return 0;
        PyErr_Format(PyExc_ReferenceError, "StructRNA of type %.200s has been removed", Py_TYPE(pysrna)->tp_name);
        return -1;
}

int pyrna_prop_validity_check(BPy_PropertyRNA *self)
{
        if(self->ptr.type)
                return 0;
        PyErr_Format(PyExc_ReferenceError,
                     "PropertyRNA of type %.200s.%.200s has been removed",
                     Py_TYPE(self)->tp_name, RNA_property_identifier(self->prop));
        return -1;
}

#if defined(USE_PYRNA_INVALIDATE_GC) || defined(USE_PYRNA_INVALIDATE_WEAKREF)
static void pyrna_invalidate(BPy_DummyPointerRNA *self)
{
        self->ptr.type= NULL; /* this is checked for validity */
        self->ptr.id.data= NULL; /* should not be needed but prevent bad pointer access, just incase */
}
#endif

#ifdef USE_PYRNA_INVALIDATE_GC
#define FROM_GC(g) ((PyObject *)(((PyGC_Head *)g)+1))

/* only for sizeof() */
struct gc_generation {
        PyGC_Head head;
        int threshold;
        int count;
} gc_generation;

static void id_release_gc(struct ID *id)
{
        unsigned int j;
        // unsigned int i= 0;
        for(j=0; j<3; j++) {
                /* hack below to get the 2 other lists from _PyGC_generation0 that are normally not exposed */
                PyGC_Head *gen= (PyGC_Head *)(((char *)_PyGC_generation0) + (sizeof(gc_generation) * j));
                PyGC_Head *g= gen->gc.gc_next;
                while ((g= g->gc.gc_next) != gen) {
                        PyObject *ob= FROM_GC(g);
                        if(PyType_IsSubtype(Py_TYPE(ob), &pyrna_struct_Type) || PyType_IsSubtype(Py_TYPE(ob), &pyrna_prop_Type)) {
                                BPy_DummyPointerRNA *ob_ptr= (BPy_DummyPointerRNA *)ob;
                                if(ob_ptr->ptr.id.data == id) {
                                        pyrna_invalidate(ob_ptr);
                                        // printf("freeing: %p %s, %.200s\n", (void *)ob, id->name, Py_TYPE(ob)->tp_name);
                                        // i++;
                                }
                        }
                }
        }
        // printf("id_release_gc freed '%s': %d\n", id->name, i);
}
#endif

#ifdef USE_PYRNA_INVALIDATE_WEAKREF
//#define DEBUG_RNA_WEAKREF

struct GHash *id_weakref_pool= NULL;
static PyObject *id_free_weakref_cb(PyObject *weakinfo_pair, PyObject *weakref);
static PyMethodDef id_free_weakref_cb_def= {"id_free_weakref_cb", (PyCFunction)id_free_weakref_cb, METH_O, NULL};

/* adds a reference to the list, remember to decref */
static GHash *id_weakref_pool_get(ID *id)
{
        GHash *weakinfo_hash= NULL;

        if(id_weakref_pool) {
                weakinfo_hash= BLI_ghash_lookup(id_weakref_pool, (void *)id);
        }
        else {
                /* first time, allocate pool */
                id_weakref_pool= BLI_ghash_new(BLI_ghashutil_ptrhash, BLI_ghashutil_ptrcmp, "rna_global_pool");
                weakinfo_hash= NULL;
        }

        if(weakinfo_hash==NULL) {
                /* we're using a ghash as a set, could use libHX's HXMAP_SINGULAR but would be an extra dep. */
                weakinfo_hash= BLI_ghash_new(BLI_ghashutil_ptrhash, BLI_ghashutil_ptrcmp, "rna_id");
                BLI_ghash_insert(id_weakref_pool, (void *)id, weakinfo_hash);
        }

        return weakinfo_hash;
}

/* called from pyrna_struct_CreatePyObject() and pyrna_prop_CreatePyObject() */
void id_weakref_pool_add(ID *id, BPy_DummyPointerRNA *pyrna)
{
        PyObject *weakref;
        PyObject *weakref_capsule;
        PyObject *weakref_cb_py;

        /* create a new function instance and insert the list as 'self' so we can remove ourself from it */
        GHash *weakinfo_hash= id_weakref_pool_get(id); /* new or existing */

        weakref_capsule= PyCapsule_New(weakinfo_hash, NULL, NULL);
        weakref_cb_py= PyCFunction_New(&id_free_weakref_cb_def, weakref_capsule);
        Py_DECREF(weakref_capsule);

        /* add weakref to weakinfo_hash list */
        weakref= PyWeakref_NewRef((PyObject *)pyrna, weakref_cb_py);

        Py_DECREF(weakref_cb_py); /* function owned by the weakref now */

        /* important to add at the end, since first removal looks at the end */
        BLI_ghash_insert(weakinfo_hash, (void *)weakref, id); /* using a hash table as a set, all 'id's are the same */
        /* weakinfo_hash owns the weakref */

}

/* workaround to get the last id without a lookup */
static ID *_id_tmp_ptr;
static void value_id_set(void *id)
{
        _id_tmp_ptr= (ID *)id;
}

static void id_release_weakref_list(struct ID *id, GHash *weakinfo_hash);
static PyObject *id_free_weakref_cb(PyObject *weakinfo_capsule, PyObject *weakref)
{
        /* important to search backwards */
        GHash *weakinfo_hash= PyCapsule_GetPointer(weakinfo_capsule, NULL);


        if(BLI_ghash_size(weakinfo_hash) > 1) {
                BLI_ghash_remove(weakinfo_hash, weakref, NULL, NULL);
        }
        else { /* get the last id and free it */
                BLI_ghash_remove(weakinfo_hash, weakref, NULL, value_id_set);
                id_release_weakref_list(_id_tmp_ptr, weakinfo_hash);
        }

        Py_DECREF(weakref);

        Py_RETURN_NONE;
}

static void id_release_weakref_list(struct ID *id, GHash *weakinfo_hash)
{
        GHashIterator weakinfo_hash_iter;

        BLI_ghashIterator_init(&weakinfo_hash_iter, weakinfo_hash);

#ifdef DEBUG_RNA_WEAKREF
        fprintf(stdout, "id_release_weakref: '%s', %d items\n", id->name, BLI_ghash_size(weakinfo_hash));
#endif

        while (!BLI_ghashIterator_isDone(&weakinfo_hash_iter)) {
                PyObject *weakref= (PyObject *)BLI_ghashIterator_getKey(&weakinfo_hash_iter);
                PyObject *item= PyWeakref_GET_OBJECT(weakref);
                if(item != Py_None) {

#ifdef DEBUG_RNA_WEAKREF
                        PyC_ObSpit("id_release_weakref item ", item);
#endif

                        pyrna_invalidate((BPy_DummyPointerRNA *)item);
                }

                Py_DECREF(weakref);

                BLI_ghashIterator_step(&weakinfo_hash_iter);
        }

        BLI_ghash_remove(id_weakref_pool, (void *)id, NULL, NULL);
        BLI_ghash_free(weakinfo_hash, NULL, NULL);

        if(BLI_ghash_size(id_weakref_pool) == 0) {
                BLI_ghash_free(id_weakref_pool, NULL, NULL);
                id_weakref_pool= NULL;
#ifdef DEBUG_RNA_WEAKREF
                printf("id_release_weakref freeing pool\n");
#endif
        }
}

static void id_release_weakref(struct ID *id)
{
        GHash *weakinfo_hash= BLI_ghash_lookup(id_weakref_pool, (void *)id);
        if(weakinfo_hash) {
                id_release_weakref_list(id, weakinfo_hash);
        }
}

#endif /* USE_PYRNA_INVALIDATE_WEAKREF */

void BPY_id_release(struct ID *id)
{
#ifdef USE_PYRNA_INVALIDATE_GC
        id_release_gc(id);
#endif

#ifdef USE_PYRNA_INVALIDATE_WEAKREF
        if(id_weakref_pool) {
                PyGILState_STATE gilstate= PyGILState_Ensure();

                id_release_weakref(id);

                PyGILState_Release(gilstate);
        }
#endif /* USE_PYRNA_INVALIDATE_WEAKREF */

        (void)id;
}

#ifdef USE_PEDANTIC_WRITE
static short rna_disallow_writes= FALSE;

static int rna_id_write_error(PointerRNA *ptr, PyObject *key)
{
        ID *id= ptr->id.data;
        if(id) {
                const short idcode= GS(id->name);
                if(!ELEM(idcode, ID_WM, ID_SCR)) { /* may need more added here */
                        const char *idtype= BKE_idcode_to_name(idcode);
                        const char *pyname;
                        if(key && PyUnicode_Check(key)) pyname= _PyUnicode_AsString(key);
                        else                                                    pyname= "<UNKNOWN>";

                        /* make a nice string error */
                        BLI_assert(idtype != NULL);
                        PyErr_Format(PyExc_AttributeError,
                                     "Writing to ID classes in this context is not allowed: "
                                     "%.200s, %.200s datablock, error setting %.200s.%.200s",
                                     id->name+2, idtype, RNA_struct_identifier(ptr->type), pyname);

                        return TRUE;
                }
        }
        return FALSE;
}
#endif // USE_PEDANTIC_WRITE


#ifdef USE_PEDANTIC_WRITE
int pyrna_write_check(void)
{
        return !rna_disallow_writes;
}

void pyrna_write_set(int val)
{
        rna_disallow_writes= !val;
}
#else // USE_PEDANTIC_WRITE
int pyrna_write_check(void)
{
        return TRUE;
}
void pyrna_write_set(int UNUSED(val))
{
        /* nothing */
}
#endif // USE_PEDANTIC_WRITE

static Py_ssize_t pyrna_prop_collection_length(BPy_PropertyRNA *self);
static Py_ssize_t pyrna_prop_array_length(BPy_PropertyArrayRNA *self);
static int pyrna_py_to_prop(PointerRNA *ptr, PropertyRNA *prop, void *data, PyObject *value, const char *error_prefix);
static int deferred_register_prop(StructRNA *srna, PyObject *key, PyObject *item);

#ifdef USE_MATHUTILS
#include "../mathutils/mathutils.h" /* so we can have mathutils callbacks */

static PyObject *pyrna_prop_array_subscript_slice(BPy_PropertyArrayRNA *self, PointerRNA *ptr, PropertyRNA *prop, Py_ssize_t start, Py_ssize_t stop, Py_ssize_t length);
static short pyrna_rotation_euler_order_get(PointerRNA *ptr, PropertyRNA **prop_eul_order, short order_fallback);

/* bpyrna vector/euler/quat callbacks */
static int mathutils_rna_array_cb_index= -1; /* index for our callbacks */

/* subtype not used much yet */
#define MATHUTILS_CB_SUBTYPE_EUL 0
#define MATHUTILS_CB_SUBTYPE_VEC 1
#define MATHUTILS_CB_SUBTYPE_QUAT 2
#define MATHUTILS_CB_SUBTYPE_COLOR 3

static int mathutils_rna_generic_check(BaseMathObject *bmo)
{
        BPy_PropertyRNA *self= (BPy_PropertyRNA *)bmo->cb_user;

        PYRNA_PROP_CHECK_INT(self)

        return self->prop ? 0 : -1;
}

static int mathutils_rna_vector_get(BaseMathObject *bmo, int subtype)
{
        BPy_PropertyRNA *self= (BPy_PropertyRNA *)bmo->cb_user;

        PYRNA_PROP_CHECK_INT(self)

        if(self->prop==NULL)
                return -1;

        RNA_property_float_get_array(&self->ptr, self->prop, bmo->data);

        /* Euler order exception */
        if(subtype==MATHUTILS_CB_SUBTYPE_EUL) {
                EulerObject *eul= (EulerObject *)bmo;
                PropertyRNA *prop_eul_order= NULL;
                eul->order= pyrna_rotation_euler_order_get(&self->ptr, &prop_eul_order, eul->order);
        }

        return 0;
}

static int mathutils_rna_vector_set(BaseMathObject *bmo, int subtype)
{
        BPy_PropertyRNA *self= (BPy_PropertyRNA *)bmo->cb_user;
        float min, max;

        PYRNA_PROP_CHECK_INT(self)

        if(self->prop==NULL)
                return -1;

#ifdef USE_PEDANTIC_WRITE
        if(rna_disallow_writes && rna_id_write_error(&self->ptr, NULL)) {
                return -1;
        }
#endif // USE_PEDANTIC_WRITE

        if (!RNA_property_editable_flag(&self->ptr, self->prop)) {
                PyErr_Format(PyExc_AttributeError,
                             "bpy_prop \"%.200s.%.200s\" is read-only",
                             RNA_struct_identifier(self->ptr.type), RNA_property_identifier(self->prop));
                return -1;
        }

        RNA_property_float_range(&self->ptr, self->prop, &min, &max);

        if(min != FLT_MIN || max != FLT_MAX) {
                int i, len= RNA_property_array_length(&self->ptr, self->prop);
                for(i=0; i<len; i++) {
                        CLAMP(bmo->data[i], min, max);
                }
        }

        RNA_property_float_set_array(&self->ptr, self->prop, bmo->data);
        if(RNA_property_update_check(self->prop)) {
                RNA_property_update(BPy_GetContext(), &self->ptr, self->prop);
        }

        /* Euler order exception */
        if(subtype==MATHUTILS_CB_SUBTYPE_EUL) {
                EulerObject *eul= (EulerObject *)bmo;
                PropertyRNA *prop_eul_order= NULL;
                short order= pyrna_rotation_euler_order_get(&self->ptr, &prop_eul_order, eul->order);
                if(order != eul->order) {
                        RNA_property_enum_set(&self->ptr, prop_eul_order, eul->order);
                        if(RNA_property_update_check(prop_eul_order)) {
                                RNA_property_update(BPy_GetContext(), &self->ptr, prop_eul_order);
                        }
                }
        }
        return 0;
}

static int mathutils_rna_vector_get_index(BaseMathObject *bmo, int UNUSED(subtype), int index)
{
        BPy_PropertyRNA *self= (BPy_PropertyRNA *)bmo->cb_user;

        PYRNA_PROP_CHECK_INT(self)

        if(self->prop==NULL)
                return -1;

        bmo->data[index]= RNA_property_float_get_index(&self->ptr, self->prop, index);
        return 0;
}

static int mathutils_rna_vector_set_index(BaseMathObject *bmo, int UNUSED(subtype), int index)
{
        BPy_PropertyRNA *self= (BPy_PropertyRNA *)bmo->cb_user;

        PYRNA_PROP_CHECK_INT(self)

        if(self->prop==NULL)
                return -1;

#ifdef USE_PEDANTIC_WRITE
        if(rna_disallow_writes && rna_id_write_error(&self->ptr, NULL)) {
                return -1;
        }
#endif // USE_PEDANTIC_WRITE

        if (!RNA_property_editable_flag(&self->ptr, self->prop)) {
                PyErr_Format(PyExc_AttributeError,
                             "bpy_prop \"%.200s.%.200s\" is read-only",
                             RNA_struct_identifier(self->ptr.type), RNA_property_identifier(self->prop));
                return -1;
        }

        RNA_property_float_clamp(&self->ptr, self->prop, &bmo->data[index]);
        RNA_property_float_set_index(&self->ptr, self->prop, index, bmo->data[index]);

        if(RNA_property_update_check(self->prop)) {
                RNA_property_update(BPy_GetContext(), &self->ptr, self->prop);
        }

        return 0;
}

static Mathutils_Callback mathutils_rna_array_cb= {
        (BaseMathCheckFunc)             mathutils_rna_generic_check,
        (BaseMathGetFunc)               mathutils_rna_vector_get,
        (BaseMathSetFunc)               mathutils_rna_vector_set,
        (BaseMathGetIndexFunc)  mathutils_rna_vector_get_index,
        (BaseMathSetIndexFunc)  mathutils_rna_vector_set_index
};


/* bpyrna matrix callbacks */
static int mathutils_rna_matrix_cb_index= -1; /* index for our callbacks */

static int mathutils_rna_matrix_get(BaseMathObject *bmo, int UNUSED(subtype))
{
        BPy_PropertyRNA *self= (BPy_PropertyRNA *)bmo->cb_user;

        PYRNA_PROP_CHECK_INT(self)

        if(self->prop==NULL)
                return -1;

        RNA_property_float_get_array(&self->ptr, self->prop, bmo->data);
        return 0;
}

static int mathutils_rna_matrix_set(BaseMathObject *bmo, int UNUSED(subtype))
{
        BPy_PropertyRNA *self= (BPy_PropertyRNA *)bmo->cb_user;

        PYRNA_PROP_CHECK_INT(self)

        if(self->prop==NULL)
                return -1;

#ifdef USE_PEDANTIC_WRITE
        if(rna_disallow_writes && rna_id_write_error(&self->ptr, NULL)) {
                return -1;
        }
#endif // USE_PEDANTIC_WRITE

        if (!RNA_property_editable_flag(&self->ptr, self->prop)) {
                PyErr_Format(PyExc_AttributeError,
                             "bpy_prop \"%.200s.%.200s\" is read-only",
                             RNA_struct_identifier(self->ptr.type), RNA_property_identifier(self->prop));
                return -1;
        }

        /* can ignore clamping here */
        RNA_property_float_set_array(&self->ptr, self->prop, bmo->data);

        if(RNA_property_update_check(self->prop)) {
                RNA_property_update(BPy_GetContext(), &self->ptr, self->prop);
        }
        return 0;
}

static Mathutils_Callback mathutils_rna_matrix_cb= {
        mathutils_rna_generic_check,
        mathutils_rna_matrix_get,
        mathutils_rna_matrix_set,
        NULL,
        NULL
};

static short pyrna_rotation_euler_order_get(PointerRNA *ptr, PropertyRNA **prop_eul_order, short order_fallback)
{
        /* attempt to get order */
        if(*prop_eul_order==NULL)
                *prop_eul_order= RNA_struct_find_property(ptr, "rotation_mode");

        if(*prop_eul_order) {
                short order= RNA_property_enum_get(ptr, *prop_eul_order);
                if (order >= EULER_ORDER_XYZ && order <= EULER_ORDER_ZYX) /* could be quat or axisangle */
                        return order;
        }

        return order_fallback;
}

#endif // USE_MATHUTILS

/* note that PROP_NONE is included as a vector subtype. this is because its handy to
 * have x/y access to fcurve keyframes and other fixed size float arrays of length 2-4. */
#define PROP_ALL_VECTOR_SUBTYPES PROP_COORDS: case PROP_TRANSLATION: case PROP_DIRECTION: case PROP_VELOCITY: case PROP_ACCELERATION: case PROP_XYZ: case PROP_XYZ_LENGTH

PyObject *pyrna_math_object_from_array(PointerRNA *ptr, PropertyRNA *prop)
{
        PyObject *ret= NULL;

#ifdef USE_MATHUTILS
        int subtype, totdim;
        int len;
        int is_thick;
        int flag= RNA_property_flag(prop);

        /* disallow dynamic sized arrays to be wrapped since the size could change
         * to a size mathutils does not support */
        if ((RNA_property_type(prop) != PROP_FLOAT) || (flag & PROP_DYNAMIC))
                return NULL;

        len= RNA_property_array_length(ptr, prop);
        subtype= RNA_property_subtype(prop);
        totdim= RNA_property_array_dimension(ptr, prop, NULL);
        is_thick= (flag & PROP_THICK_WRAP);

        if (totdim == 1 || (totdim == 2 && subtype == PROP_MATRIX)) {
                if(!is_thick)
                        ret= pyrna_prop_CreatePyObject(ptr, prop); /* owned by the mathutils PyObject */

                switch(RNA_property_subtype(prop)) {
                case PROP_ALL_VECTOR_SUBTYPES:
                        if(len>=2 && len <= 4) {
                                if(is_thick) {
                                        ret= newVectorObject(NULL, len, Py_NEW, NULL);
                                        RNA_property_float_get_array(ptr, prop, ((VectorObject *)ret)->vec);
                                }
                                else {
                                        PyObject *vec_cb= newVectorObject_cb(ret, len, mathutils_rna_array_cb_index, MATHUTILS_CB_SUBTYPE_VEC);
                                        Py_DECREF(ret); /* the vector owns now */
                                        ret= vec_cb; /* return the vector instead */
                                }
                        }
                        break;
                case PROP_MATRIX:
                        if(len==16) {
                                if(is_thick) {
                                        ret= newMatrixObject(NULL, 4, 4, Py_NEW, NULL);
                                        RNA_property_float_get_array(ptr, prop, ((MatrixObject *)ret)->contigPtr);
                                }
                                else {
                                        PyObject *mat_cb= newMatrixObject_cb(ret, 4,4, mathutils_rna_matrix_cb_index, FALSE);
                                        Py_DECREF(ret); /* the matrix owns now */
                                        ret= mat_cb; /* return the matrix instead */
                                }
                        }
                        else if (len==9) {
                                if(is_thick) {
                                        ret= newMatrixObject(NULL, 3, 3, Py_NEW, NULL);
                                        RNA_property_float_get_array(ptr, prop, ((MatrixObject *)ret)->contigPtr);
                                }
                                else {
                                        PyObject *mat_cb= newMatrixObject_cb(ret, 3,3, mathutils_rna_matrix_cb_index, FALSE);
                                        Py_DECREF(ret); /* the matrix owns now */
                                        ret= mat_cb; /* return the matrix instead */
                                }
                        }
                        break;
                case PROP_EULER:
                case PROP_QUATERNION:
                        if(len==3) { /* euler */
                                if(is_thick) {
                                        /* attempt to get order, only needed for thick types since wrapped with update via callbacks */
                                        PropertyRNA *prop_eul_order= NULL;
                                        short order= pyrna_rotation_euler_order_get(ptr, &prop_eul_order, EULER_ORDER_XYZ);

                                        ret= newEulerObject(NULL, order, Py_NEW, NULL); // TODO, get order from RNA
                                        RNA_property_float_get_array(ptr, prop, ((EulerObject *)ret)->eul);
                                }
                                else {
                                        /* order will be updated from callback on use */
                                        PyObject *eul_cb= newEulerObject_cb(ret, EULER_ORDER_XYZ, mathutils_rna_array_cb_index, MATHUTILS_CB_SUBTYPE_EUL); // TODO, get order from RNA
                                        Py_DECREF(ret); /* the euler owns now */
                                        ret= eul_cb; /* return the euler instead */
                                }
                        }
                        else if (len==4) {
                                if(is_thick) {
                                        ret= newQuaternionObject(NULL, Py_NEW, NULL);
                                        RNA_property_float_get_array(ptr, prop, ((QuaternionObject *)ret)->quat);
                                }
                                else {
                                        PyObject *quat_cb= newQuaternionObject_cb(ret, mathutils_rna_array_cb_index, MATHUTILS_CB_SUBTYPE_QUAT);
                                        Py_DECREF(ret); /* the quat owns now */
                                        ret= quat_cb; /* return the quat instead */
                                }
                        }
                        break;
                case PROP_COLOR:
                case PROP_COLOR_GAMMA:
                        if(len==3) { /* color */
                                if(is_thick) {
                                        ret= newColorObject(NULL, Py_NEW, NULL); // TODO, get order from RNA
                                        RNA_property_float_get_array(ptr, prop, ((ColorObject *)ret)->col);
                                }
                                else {
                                        PyObject *col_cb= newColorObject_cb(ret, mathutils_rna_array_cb_index, MATHUTILS_CB_SUBTYPE_COLOR);
                                        Py_DECREF(ret); /* the color owns now */
                                        ret= col_cb; /* return the color instead */
                                }
                        }
                default:
                        break;
                }
        }

        if(ret==NULL) {
                if(is_thick) {
                        /* this is an array we cant reference (since its not thin wrappable)
                         * and cannot be coerced into a mathutils type, so return as a list */
                        ret= pyrna_prop_array_subscript_slice(NULL, ptr, prop, 0, len, len);
                }
                else {
                        ret= pyrna_prop_CreatePyObject(ptr, prop); /* owned by the mathutils PyObject */
                }
        }
#else // USE_MATHUTILS
        (void)ptr;
        (void)prop;
#endif // USE_MATHUTILS

        return ret;
}

/* same as RNA_enum_value_from_id but raises an exception */
int pyrna_enum_value_from_id(EnumPropertyItem *item, const char *identifier, int *value, const char *error_prefix)
{
        if(RNA_enum_value_from_id(item, identifier, value) == 0) {
                const char *enum_str= BPy_enum_as_string(item);
                PyErr_Format(PyExc_TypeError,
                             "%s: '%.200s' not found in (%s)",
                             error_prefix, identifier, enum_str);
                MEM_freeN((void *)enum_str);
                return -1;
        }

        return 0;
}

static int pyrna_struct_compare(BPy_StructRNA *a, BPy_StructRNA *b)
{
        return (a->ptr.data==b->ptr.data) ? 0 : -1;
}

static int pyrna_prop_compare(BPy_PropertyRNA *a, BPy_PropertyRNA *b)
{
        return (a->prop==b->prop && a->ptr.data==b->ptr.data) ? 0 : -1;
}

static PyObject *pyrna_struct_richcmp(PyObject *a, PyObject *b, int op)
{
        PyObject *res;
        int ok= -1; /* zero is true */

        if (BPy_StructRNA_Check(a) && BPy_StructRNA_Check(b))
                ok= pyrna_struct_compare((BPy_StructRNA *)a, (BPy_StructRNA *)b);

        switch (op) {
        case Py_NE:
                ok= !ok; /* pass through */
        case Py_EQ:
                res= ok ? Py_False : Py_True;
                break;

        case Py_LT:
        case Py_LE:
        case Py_GT:
        case Py_GE:
                res= Py_NotImplemented;
                break;
        default:
                PyErr_BadArgument();
                return NULL;
        }

        return Py_INCREF(res), res;
}

static PyObject *pyrna_prop_richcmp(PyObject *a, PyObject *b, int op)
{
        PyObject *res;
        int ok= -1; /* zero is true */

        if (BPy_PropertyRNA_Check(a) && BPy_PropertyRNA_Check(b))
                ok= pyrna_prop_compare((BPy_PropertyRNA *)a, (BPy_PropertyRNA *)b);

        switch (op) {
        case Py_NE:
                ok= !ok; /* pass through */
        case Py_EQ:
                res= ok ? Py_False : Py_True;
                break;

        case Py_LT:
        case Py_LE:
        case Py_GT:
        case Py_GE:
                res= Py_NotImplemented;
                break;
        default:
                PyErr_BadArgument();
                return NULL;
        }

        return Py_INCREF(res), res;
}

/*----------------------repr--------------------------------------------*/
static PyObject *pyrna_struct_str(BPy_StructRNA *self)
{
        PyObject *ret;
        const char *name;

        if(!PYRNA_STRUCT_IS_VALID(self)) {
                return PyUnicode_FromFormat("<bpy_struct, %.200s dead>", Py_TYPE(self)->tp_name);
        }

        /* print name if available */
        name= RNA_struct_name_get_alloc(&self->ptr, NULL, FALSE);
        if(name) {
                ret= PyUnicode_FromFormat("<bpy_struct, %.200s(\"%.200s\")>", RNA_struct_identifier(self->ptr.type), name);
                MEM_freeN((void *)name);
                return ret;
        }

        return PyUnicode_FromFormat("<bpy_struct, %.200s at %p>", RNA_struct_identifier(self->ptr.type), self->ptr.data);
}

static PyObject *pyrna_struct_repr(BPy_StructRNA *self)
{
        ID *id= self->ptr.id.data;
        if(id == NULL || !PYRNA_STRUCT_IS_VALID(self))
                return pyrna_struct_str(self); /* fallback */

        if(RNA_struct_is_ID(self->ptr.type)) {
                return PyUnicode_FromFormat("bpy.data.%s[\"%s\"]", BKE_idcode_to_name_plural(GS(id->name)), id->name+2);
        }
        else {
                PyObject *ret;
                const char *path;
                path= RNA_path_from_ID_to_struct(&self->ptr);
                if(path) {
                        ret= PyUnicode_FromFormat("bpy.data.%s[\"%s\"].%s", BKE_idcode_to_name_plural(GS(id->name)), id->name+2, path);
                        MEM_freeN((void *)path);
                }
                else { /* cant find, print something sane */
                        ret= PyUnicode_FromFormat("bpy.data.%s[\"%s\"]...%s", BKE_idcode_to_name_plural(GS(id->name)), id->name+2, RNA_struct_identifier(self->ptr.type));
                }

                return ret;
        }
}

static PyObject *pyrna_prop_str(BPy_PropertyRNA *self)
{
        PyObject *ret;
        PointerRNA ptr;
        const char *name;
        const char *type_id= NULL;
        char type_fmt[64]= "";
        int type;

        PYRNA_PROP_CHECK_OBJ(self)

        type= RNA_property_type(self->prop);

        if(RNA_enum_id_from_value(property_type_items, type, &type_id)==0) {
                PyErr_SetString(PyExc_RuntimeError, "could not use property type, internal error"); /* should never happen */
                return NULL;
        }
        else {
                /* this should never fail */
                int len= -1;
                char *c= type_fmt;

                while ((*c++= tolower(*type_id++))) {} ;

                if(type==PROP_COLLECTION) {
                        len= pyrna_prop_collection_length(self);
                }
                else if (RNA_property_array_check(&self->ptr, self->prop)) {
                        len= pyrna_prop_array_length((BPy_PropertyArrayRNA *)self);
                }

                if(len != -1)
                        sprintf(--c, "[%d]", len);
        }

        /* if a pointer, try to print name of pointer target too */
        if(RNA_property_type(self->prop) == PROP_POINTER) {
                ptr= RNA_property_pointer_get(&self->ptr, self->prop);
                name= RNA_struct_name_get_alloc(&ptr, NULL, FALSE);

                if(name) {
                        ret= PyUnicode_FromFormat("<bpy_%.200s, %.200s.%.200s(\"%.200s\")>", type_fmt, RNA_struct_identifier(self->ptr.type), RNA_property_identifier(self->prop), name);
                        MEM_freeN((void *)name);
                        return ret;
                }
        }
        if(RNA_property_type(self->prop) == PROP_COLLECTION) {
                PointerRNA r_ptr;
                if(RNA_property_collection_type_get(&self->ptr, self->prop, &r_ptr)) {
                        return PyUnicode_FromFormat("<bpy_%.200s, %.200s>", type_fmt, RNA_struct_identifier(r_ptr.type));
                }
        }

        return PyUnicode_FromFormat("<bpy_%.200s, %.200s.%.200s>", type_fmt, RNA_struct_identifier(self->ptr.type), RNA_property_identifier(self->prop));
}

static PyObject *pyrna_prop_repr(BPy_PropertyRNA *self)
{
        ID *id;
        PyObject *ret;
        const char *path;

        PYRNA_PROP_CHECK_OBJ(self)

        if((id= self->ptr.id.data) == NULL)
                return pyrna_prop_str(self); /* fallback */

        path= RNA_path_from_ID_to_property(&self->ptr, self->prop);
        if(path) {
                ret= PyUnicode_FromFormat("bpy.data.%s[\"%s\"].%s", BKE_idcode_to_name_plural(GS(id->name)), id->name+2, path);
                MEM_freeN((void *)path);
        }
        else { /* cant find, print something sane */
                ret= PyUnicode_FromFormat("bpy.data.%s[\"%s\"]...%s", BKE_idcode_to_name_plural(GS(id->name)), id->name+2, RNA_property_identifier(self->prop));
        }

        return ret;
}


static PyObject *pyrna_func_repr(BPy_FunctionRNA *self)
{
        return PyUnicode_FromFormat("<%.200s %.200s.%.200s()>", Py_TYPE(self)->tp_name, RNA_struct_identifier(self->ptr.type), RNA_function_identifier(self->func));
}


static long pyrna_struct_hash(BPy_StructRNA *self)
{
        return _Py_HashPointer(self->ptr.data);
}

/* from python's meth_hash v3.1.2 */
static long pyrna_prop_hash(BPy_PropertyRNA *self)
{
        long x, y;
        if (self->ptr.data == NULL)
                x= 0;
        else {
                x= _Py_HashPointer(self->ptr.data);
                if (x == -1)
                        return -1;
        }
        y= _Py_HashPointer((void*)(self->prop));
        if (y == -1)
                return -1;
        x ^= y;
        if (x == -1)
                x= -2;
        return x;
}

#ifdef USE_PYRNA_STRUCT_REFERENCE
static int pyrna_struct_traverse(BPy_StructRNA *self, visitproc visit, void *arg)
{
        Py_VISIT(self->reference);
        return 0;
}

static int pyrna_struct_clear(BPy_StructRNA *self)
{
        Py_CLEAR(self->reference);
        return 0;
}
#endif /* !USE_PYRNA_STRUCT_REFERENCE */

/* use our own dealloc so we can free a property if we use one */
static void pyrna_struct_dealloc(BPy_StructRNA *self)
{
#ifdef PYRNA_FREE_SUPPORT
        if (self->freeptr && self->ptr.data) {
                IDP_FreeProperty(self->ptr.data);
                MEM_freeN(self->ptr.data);
                self->ptr.data= NULL;
        }
#endif /* PYRNA_FREE_SUPPORT */

#ifdef USE_WEAKREFS
        if (self->in_weakreflist != NULL) {
                PyObject_ClearWeakRefs((PyObject *)self);
        }
#endif

#ifdef USE_PYRNA_STRUCT_REFERENCE
        if(self->reference) {
                PyObject_GC_UnTrack(self);
                pyrna_struct_clear(self);
        }
#endif /* !USE_PYRNA_STRUCT_REFERENCE */

        /* Note, for subclassed PyObjects we cant just call PyObject_DEL() directly or it will crash */
        Py_TYPE(self)->tp_free(self);
}

#ifdef USE_PYRNA_STRUCT_REFERENCE
static void pyrna_struct_reference_set(BPy_StructRNA *self, PyObject *reference)
{
        if(self->reference) {
//              PyObject_GC_UnTrack(self); /* INITIALIZED TRACKED? */
                pyrna_struct_clear(self);
        }
        /* reference is now NULL */

        if(reference) {
                self->reference= reference;
                Py_INCREF(reference);
//              PyObject_GC_Track(self);  /* INITIALIZED TRACKED? */
        }
}
#endif /* !USE_PYRNA_STRUCT_REFERENCE */

/* use our own dealloc so we can free a property if we use one */
static void pyrna_prop_dealloc(BPy_PropertyRNA *self)
{
#ifdef USE_WEAKREFS
        if (self->in_weakreflist != NULL) {
                PyObject_ClearWeakRefs((PyObject *)self);
        }
#endif
        /* Note, for subclassed PyObjects we cant just call PyObject_DEL() directly or it will crash */
        Py_TYPE(self)->tp_free(self);
}

static void pyrna_prop_array_dealloc(BPy_PropertyRNA *self)
{
#ifdef USE_WEAKREFS
        if (self->in_weakreflist != NULL) {
                PyObject_ClearWeakRefs((PyObject *)self);
        }
#endif
        /* Note, for subclassed PyObjects we cant just call PyObject_DEL() directly or it will crash */
        Py_TYPE(self)->tp_free(self);
}

static const char *pyrna_enum_as_string(PointerRNA *ptr, PropertyRNA *prop)
{
        EnumPropertyItem *item;
        const char *result;
        int free= FALSE;

        RNA_property_enum_items(BPy_GetContext(), ptr, prop, &item, NULL, &free);
        if(item) {
                result= BPy_enum_as_string(item);
        }
        else {
                result= "";
        }

        if(free)
                MEM_freeN(item);

        return result;
}


static int pyrna_string_to_enum(PyObject *item, PointerRNA *ptr, PropertyRNA *prop, int *val, const char *error_prefix)
{
        const char *param= _PyUnicode_AsString(item);

        if (param==NULL) {
                const char *enum_str= pyrna_enum_as_string(ptr, prop);
                PyErr_Format(PyExc_TypeError,
                             "%.200s expected a string enum type in (%.200s)",
                             error_prefix, enum_str);
                MEM_freeN((void *)enum_str);
                return 0;
        }
        else {
                /* hack so that dynamic enums used for operator properties will be able to be built (i.e. context will be supplied to itemf)
                 * and thus running defining operator buttons for such operators in UI will work */
                RNA_def_property_clear_flag(prop, PROP_ENUM_NO_CONTEXT);

                if (!RNA_property_enum_value(BPy_GetContext(), ptr, prop, param, val)) {
                        const char *enum_str= pyrna_enum_as_string(ptr, prop);
                        PyErr_Format(PyExc_TypeError,
                                     "%.200s enum \"%.200s\" not found in (%.200s)",
                                     error_prefix, param, enum_str);
                        MEM_freeN((void *)enum_str);
                        return 0;
                }
        }

        return 1;
}

int pyrna_set_to_enum_bitfield(EnumPropertyItem *items, PyObject *value, int *r_value, const char *error_prefix)
{
        /* set of enum items, concatenate all values with OR */
        int ret, flag= 0;

        /* set looping */
        Py_ssize_t pos= 0;
        Py_ssize_t hash= 0;
        PyObject *key;

        *r_value= 0;

        while (_PySet_NextEntry(value, &pos, &key, &hash)) {
                const char *param= _PyUnicode_AsString(key);

                if(param==NULL) {
                        PyErr_Format(PyExc_TypeError,
                                     "%.200s expected a string, not %.200s",
                                     error_prefix, Py_TYPE(key)->tp_name);
                        return -1;
                }
                if(pyrna_enum_value_from_id(items, param, &ret, error_prefix) < 0)
                        return -1;

                flag |= ret;
        }

        *r_value= flag;
        return 0;
}

static int pyrna_prop_to_enum_bitfield(PointerRNA *ptr, PropertyRNA *prop, PyObject *value, int *r_value, const char *error_prefix)
{
        EnumPropertyItem *item;
        int ret;
        int free= FALSE;

        *r_value= 0;

        RNA_property_enum_items(BPy_GetContext(), ptr, prop, &item, NULL, &free);

        if(item) {
                ret= pyrna_set_to_enum_bitfield(item, value, r_value, error_prefix);
        }
        else {
                if(PySet_GET_SIZE(value)) {
                        PyErr_Format(PyExc_TypeError,
                                     "%.200s: empty enum \"%.200s\" could not have any values assigned",
                                     error_prefix, RNA_property_identifier(prop));
                        ret= -1;
                }
                else {
                        ret= 0;
                }
        }

        if(free)
                MEM_freeN(item);

        return ret;
}

PyObject *pyrna_enum_bitfield_to_py(EnumPropertyItem *items, int value)
{
        PyObject *ret= PySet_New(NULL);
        const char *identifier[RNA_ENUM_BITFLAG_SIZE + 1];

        if(RNA_enum_bitflag_identifiers(items, value, identifier)) {
                PyObject *item;
                int index;
                for(index=0; identifier[index]; index++) {
                        item= PyUnicode_FromString(identifier[index]);
                        PySet_Add(ret, item);
                        Py_DECREF(item);
                }
        }

        return ret;
}

static PyObject *pyrna_enum_to_py(PointerRNA *ptr, PropertyRNA *prop, int val)
{
        PyObject *item, *ret= NULL;

        if(RNA_property_flag(prop) & PROP_ENUM_FLAG) {
                const char *identifier[RNA_ENUM_BITFLAG_SIZE + 1];

                ret= PySet_New(NULL);

                if (RNA_property_enum_bitflag_identifiers(BPy_GetContext(), ptr, prop, val, identifier)) {
                        int index;

                        for(index=0; identifier[index]; index++) {
                                item= PyUnicode_FromString(identifier[index]);
                                PySet_Add(ret, item);
                                Py_DECREF(item);
                        }

                }
        }
        else {
                const char *identifier;
                if (RNA_property_enum_identifier(BPy_GetContext(), ptr, prop, val, &identifier)) {
                        ret= PyUnicode_FromString(identifier);
                }
                else {
                        EnumPropertyItem *enum_item;
                        int free= FALSE;

                        /* don't throw error here, can't trust blender 100% to give the
                         * right values, python code should not generate error for that */
                        RNA_property_enum_items(BPy_GetContext(), ptr, prop, &enum_item, NULL, &free);
                        if(enum_item && enum_item->identifier) {
                                ret= PyUnicode_FromString(enum_item->identifier);
                        }
                        else {
                                const char *ptr_name= RNA_struct_name_get_alloc(ptr, NULL, FALSE);

                                /* prefer not fail silently incase of api errors, maybe disable it later */
                                printf("RNA Warning: Current value \"%d\" matches no enum in '%s', '%s', '%s'\n", val, RNA_struct_identifier(ptr->type), ptr_name, RNA_property_identifier(prop));

#if 0                   // gives python decoding errors while generating docs :(
                                char error_str[256];
                                snprintf(error_str, sizeof(error_str), "RNA Warning: Current value \"%d\" matches no enum in '%s', '%s', '%s'", val, RNA_struct_identifier(ptr->type), ptr_name, RNA_property_identifier(prop));
                                PyErr_Warn(PyExc_RuntimeWarning, error_str);
#endif

                                if(ptr_name)
                                        MEM_freeN((void *)ptr_name);

                                ret= PyUnicode_FromString("");
                        }

                        if(free)
                                MEM_freeN(enum_item);
                        /*
                        PyErr_Format(PyExc_AttributeError,
                                     "RNA Error: Current value \"%d\" matches no enum", val);
                        ret= NULL;
                        */
                }
        }

        return ret;
}

PyObject *pyrna_prop_to_py(PointerRNA *ptr, PropertyRNA *prop)
{
        PyObject *ret;
        int type= RNA_property_type(prop);

        if (RNA_property_array_check(ptr, prop)) {
                return pyrna_py_from_array(ptr, prop);
        }

        /* see if we can coorce into a python type - PropertyType */
        switch (type) {
        case PROP_BOOLEAN:
                ret= PyBool_FromLong(RNA_property_boolean_get(ptr, prop));
                break;
        case PROP_INT:
                ret= PyLong_FromSsize_t((Py_ssize_t)RNA_property_int_get(ptr, prop));
                break;
        case PROP_FLOAT:
                ret= PyFloat_FromDouble(RNA_property_float_get(ptr, prop));
                break;
        case PROP_STRING:
        {
                int subtype= RNA_property_subtype(prop);
                const char *buf;
                buf= RNA_property_string_get_alloc(ptr, prop, NULL, -1);
#ifdef USE_STRING_COERCE
                /* only file paths get special treatment, they may contain non utf-8 chars */
                if(ELEM3(subtype, PROP_FILEPATH, PROP_DIRPATH, PROP_FILENAME)) {
                        ret= PyC_UnicodeFromByte(buf);
                }
                else {
                        ret= PyUnicode_FromString(buf);
                }
#else // USE_STRING_COERCE
                ret= PyUnicode_FromString(buf);
#endif // USE_STRING_COERCE
                MEM_freeN((void *)buf);
                break;
        }
        case PROP_ENUM:
        {
                ret= pyrna_enum_to_py(ptr, prop, RNA_property_enum_get(ptr, prop));
                break;
        }
        case PROP_POINTER:
        {
                PointerRNA newptr;
                newptr= RNA_property_pointer_get(ptr, prop);
                if (newptr.data) {
                        ret= pyrna_struct_CreatePyObject(&newptr);
                }
                else {
                        ret= Py_None;
                        Py_INCREF(ret);
                }
                break;
        }
        case PROP_COLLECTION:
                ret= pyrna_prop_CreatePyObject(ptr, prop);
                break;
        default:
                PyErr_Format(PyExc_TypeError,
                             "bpy_struct internal error: unknown type '%d' (pyrna_prop_to_py)", type);
                ret= NULL;
                break;
        }

        return ret;
}

/* This function is used by operators and converting dicts into collections.
 * Its takes keyword args and fills them with property values */
int pyrna_pydict_to_props(PointerRNA *ptr, PyObject *kw, int all_args, const char *error_prefix)
{
        int error_val= 0;
        int totkw;
        const char *arg_name= NULL;
        PyObject *item;

        totkw= kw ? PyDict_Size(kw):0;

        RNA_STRUCT_BEGIN(ptr, prop) {
                arg_name= RNA_property_identifier(prop);

                if (strcmp(arg_name, "rna_type")==0) continue;

                if (kw==NULL) {
                        PyErr_Format(PyExc_TypeError,
                                     "%.200s: no keywords, expected \"%.200s\"",
                                     error_prefix, arg_name ? arg_name : "<UNKNOWN>");
                        error_val= -1;
                        break;
                }

                item= PyDict_GetItemString(kw, arg_name); /* wont set an error */

                if (item == NULL) {
                        if(all_args) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s: keyword \"%.200s\" missing",
                                             error_prefix, arg_name ? arg_name : "<UNKNOWN>");
                                error_val= -1; /* pyrna_py_to_prop sets the error */
                                break;
                        }
                }
                else {
                        if (pyrna_py_to_prop(ptr, prop, NULL, item, error_prefix)) {
                                error_val= -1;
                                break;
                        }
                        totkw--;
                }
        }
        RNA_STRUCT_END;

        if (error_val==0 && totkw > 0) { /* some keywords were given that were not used :/ */
                PyObject *key, *value;
                Py_ssize_t pos= 0;

                while (PyDict_Next(kw, &pos, &key, &value)) {
                        arg_name= _PyUnicode_AsString(key);
                        if (RNA_struct_find_property(ptr, arg_name) == NULL) break;
                        arg_name= NULL;
                }

                PyErr_Format(PyExc_TypeError,
                             "%.200s: keyword \"%.200s\" unrecognized",
                             error_prefix, arg_name ? arg_name : "<UNKNOWN>");
                error_val= -1;
        }

        return error_val;
}


static PyObject *pyrna_func_to_py(PointerRNA *ptr, FunctionRNA *func)
{
        BPy_FunctionRNA* pyfunc= (BPy_FunctionRNA *) PyObject_NEW(BPy_FunctionRNA, &pyrna_func_Type);
        pyfunc->ptr= *ptr;
        pyfunc->func= func;
        return (PyObject *)pyfunc;
}


static int pyrna_py_to_prop(PointerRNA *ptr, PropertyRNA *prop, void *data, PyObject *value, const char *error_prefix)
{
        /* XXX hard limits should be checked here */
        int type= RNA_property_type(prop);


        if (RNA_property_array_check(ptr, prop)) {
                /* done getting the length */
                if(pyrna_py_to_array(ptr, prop, data, value, error_prefix) == -1) {
                        return -1;
                }
        }
        else {
                /* Normal Property (not an array) */

                /* see if we can coorce into a python type - PropertyType */
                switch (type) {
                case PROP_BOOLEAN:
                {
                        int param;
                        /* prefer not to have an exception here
                         * however so many poll functions return None or a valid Object.
                         * its a hassle to convert these into a bool before returning, */
                        if(RNA_property_flag(prop) & PROP_OUTPUT)
                                param= PyObject_IsTrue(value);
                        else
                                param= PyLong_AsLong(value);

                        if(param < 0) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s expected True/False or 0/1, not %.200s",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), Py_TYPE(value)->tp_name);
                                return -1;
                        }
                        else {
                                if(data)        *((int*)data)= param;
                                else            RNA_property_boolean_set(ptr, prop, param);
                        }
                        break;
                }
                case PROP_INT:
                {
                        int overflow;
                        long param= PyLong_AsLongAndOverflow(value, &overflow);
                        if(overflow || (param > INT_MAX) || (param < INT_MIN)) {
                                PyErr_Format(PyExc_ValueError,
                                             "%.200s %.200s.%.200s value not in 'int' range "
                                             "(" STRINGIFY(INT_MIN) ", " STRINGIFY(INT_MAX) ")",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop));
                                return -1;
                        }
                        else if (param==-1 && PyErr_Occurred()) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s expected an int type, not %.200s",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), Py_TYPE(value)->tp_name);
                                return -1;
                        }
                        else {
                                int param_i= (int)param;
                                RNA_property_int_clamp(ptr, prop, &param_i);
                                if(data)        *((int*)data)= param_i;
                                else            RNA_property_int_set(ptr, prop, param_i);
                        }
                        break;
                }
                case PROP_FLOAT:
                {
                        float param= PyFloat_AsDouble(value);
                        if (PyErr_Occurred()) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s expected a float type, not %.200s",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), Py_TYPE(value)->tp_name);
                                return -1;
                        }
                        else {
                                RNA_property_float_clamp(ptr, prop, (float *)&param);
                                if(data)        *((float*)data)= param;
                                else            RNA_property_float_set(ptr, prop, param);
                        }
                        break;
                }
                case PROP_STRING:
                {
                        const char *param;
#ifdef USE_STRING_COERCE
                        PyObject *value_coerce= NULL;
                        int subtype= RNA_property_subtype(prop);
                        if(ELEM3(subtype, PROP_FILEPATH, PROP_DIRPATH, PROP_FILENAME)) {
                                /* TODO, get size */
                                param= PyC_UnicodeAsByte(value, &value_coerce);
                        }
                        else {
                                param= _PyUnicode_AsString(value);
                        }
#else // USE_STRING_COERCE
                        param= _PyUnicode_AsString(value);
#endif // USE_STRING_COERCE

                        if (param==NULL) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s expected a string type, not %.200s",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), Py_TYPE(value)->tp_name);
                                return -1;
                        }
                        else {
                                if(data)        *((char**)data)= (char *)param; /*XXX, this is suspect but needed for function calls, need to see if theres a better way */
                                else            RNA_property_string_set(ptr, prop, param);
                        }
#ifdef USE_STRING_COERCE
                        Py_XDECREF(value_coerce);
#endif // USE_STRING_COERCE
                        break;
                }
                case PROP_ENUM:
                {
                        int val= 0;

                        if (PyUnicode_Check(value)) {
                                if (!pyrna_string_to_enum(value, ptr, prop, &val, error_prefix))
                                        return -1;
                        }
                        else if (PyAnySet_Check(value)) {
                                if(RNA_property_flag(prop) & PROP_ENUM_FLAG) {
                                        /* set of enum items, concatenate all values with OR */
                                        if(pyrna_prop_to_enum_bitfield(ptr, prop, value, &val, error_prefix) < 0)
                                                return -1;
                                }
                                else {
                                        PyErr_Format(PyExc_TypeError,
                                                     "%.200s, %.200s.%.200s is not a bitflag enum type",
                                                     error_prefix, RNA_struct_identifier(ptr->type),
                                                     RNA_property_identifier(prop));
                                        return -1;
                                }
                        }
                        else {
                                const char *enum_str= pyrna_enum_as_string(ptr, prop);
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s expected a string enum or a set of strings in (%.2000s), not %.200s",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), enum_str,
                                             Py_TYPE(value)->tp_name);
                                MEM_freeN((void *)enum_str);
                                return -1;
                        }

                        if(data)        *((int*)data)= val;
                        else            RNA_property_enum_set(ptr, prop, val);

                        break;
                }
                case PROP_POINTER:
                {
                        PyObject *value_new= NULL;

                        StructRNA *ptr_type= RNA_property_pointer_type(ptr, prop);
                        int flag= RNA_property_flag(prop);

                        /* this is really nasty!, so we can fake the operator having direct properties eg:
                         * layout.prop(self, "filepath")
                         * ... which infact should be
                         * layout.prop(self.properties, "filepath")
                         *
                         * we need to do this trick.
                         * if the prop is not an operator type and the pyobject is an operator, use its properties in place of its self.
                         *
                         * this is so bad that its almost a good reason to do away with fake 'self.properties -> self' class mixing
                         * if this causes problems in the future it should be removed.
                         */
                        if(     (ptr_type == &RNA_AnyType) &&
                                (BPy_StructRNA_Check(value)) &&
                                (RNA_struct_is_a(((BPy_StructRNA *)value)->ptr.type, &RNA_Operator))
                        ) {
                                value= PyObject_GetAttrString(value, "properties");
                                value_new= value;
                        }


                        /* if property is an OperatorProperties pointer and value is a map, forward back to pyrna_pydict_to_props */
                        if (RNA_struct_is_a(ptr_type, &RNA_OperatorProperties) && PyDict_Check(value)) {
                                PointerRNA opptr= RNA_property_pointer_get(ptr, prop);
                                return pyrna_pydict_to_props(&opptr, value, 0, error_prefix);
                        }

                        /* another exception, allow to pass a collection as an RNA property */
                        if(Py_TYPE(value)==&pyrna_prop_collection_Type) { /* ok to ignore idprop collections */
                                PointerRNA c_ptr;
                                BPy_PropertyRNA *value_prop= (BPy_PropertyRNA *)value;
                                if(RNA_property_collection_type_get(&value_prop->ptr, value_prop->prop, &c_ptr)) {
                                        value= pyrna_struct_CreatePyObject(&c_ptr);
                                        value_new= value;
                                }
                                else {
                                        PyErr_Format(PyExc_TypeError,
                                                     "%.200s %.200s.%.200s collection has no type, "
                                                     "cant be used as a %.200s type",
                                                     error_prefix, RNA_struct_identifier(ptr->type),
                                                     RNA_property_identifier(prop), RNA_struct_identifier(ptr_type));
                                        return -1;
                                }
                        }

                        if(!BPy_StructRNA_Check(value) && value != Py_None) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s expected a %.200s type, not %.200s",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), RNA_struct_identifier(ptr_type),
                                             Py_TYPE(value)->tp_name);
                                Py_XDECREF(value_new); return -1;
                        }
                        else if((flag & PROP_NEVER_NULL) && value == Py_None) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s does not support a 'None' assignment %.200s type",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), RNA_struct_identifier(ptr_type));
                                Py_XDECREF(value_new); return -1;
                        }
                        else if(value != Py_None && ((flag & PROP_ID_SELF_CHECK) && ptr->id.data == ((BPy_StructRNA*)value)->ptr.id.data)) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s ID type does not support assignment to its self",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop));
                                Py_XDECREF(value_new); return -1;
                        }
                        else {
                                BPy_StructRNA *param= (BPy_StructRNA*)value;
                                int raise_error= FALSE;
                                if(data) {

                                        if(flag & PROP_RNAPTR) {
                                                if(value == Py_None)
                                                        memset(data, 0, sizeof(PointerRNA));
                                                else
                                                        *((PointerRNA*)data)= param->ptr;
                                        }
                                        else if(value == Py_None) {
                                                *((void**)data)= NULL;
                                        }
                                        else if(RNA_struct_is_a(param->ptr.type, ptr_type)) {
                                                *((void**)data)= param->ptr.data;
                                        }
                                        else {
                                                raise_error= TRUE;
                                        }
                                }
                                else {
                                        /* data==NULL, assign to RNA */
                                        if(value == Py_None) {
                                                PointerRNA valueptr= {{NULL}};
                                                RNA_property_pointer_set(ptr, prop, valueptr);
                                        }
                                        else if(RNA_struct_is_a(param->ptr.type, ptr_type)) {
                                                RNA_property_pointer_set(ptr, prop, param->ptr);
                                        }
                                        else {
                                                PointerRNA tmp;
                                                RNA_pointer_create(NULL, ptr_type, NULL, &tmp);
                                                PyErr_Format(PyExc_TypeError,
                                                             "%.200s %.200s.%.200s expected a %.200s type. not %.200s",
                                                             error_prefix, RNA_struct_identifier(ptr->type),
                                                             RNA_property_identifier(prop), RNA_struct_identifier(tmp.type),
                                                             RNA_struct_identifier(param->ptr.type));
                                                Py_XDECREF(value_new); return -1;
                                        }
                                }

                                if(raise_error) {
                                        PointerRNA tmp;
                                        RNA_pointer_create(NULL, ptr_type, NULL, &tmp);
                                        PyErr_Format(PyExc_TypeError,
                                                     "%.200s %.200s.%.200s expected a %.200s type, not %.200s",
                                                     error_prefix, RNA_struct_identifier(ptr->type),
                                                     RNA_property_identifier(prop), RNA_struct_identifier(tmp.type),
                                                     RNA_struct_identifier(param->ptr.type));
                                        Py_XDECREF(value_new); return -1;
                                }
                        }

                        Py_XDECREF(value_new);

                        break;
                }
                case PROP_COLLECTION:
                {
                        int seq_len, i;
                        PyObject *item;
                        PointerRNA itemptr;
                        ListBase *lb;
                        CollectionPointerLink *link;

                        lb= (data)? (ListBase*)data: NULL;

                        /* convert a sequence of dict's into a collection */
                        if(!PySequence_Check(value)) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s %.200s.%.200s expected a sequence for an RNA collection, not %.200s",
                                             error_prefix, RNA_struct_identifier(ptr->type),
                                             RNA_property_identifier(prop), Py_TYPE(value)->tp_name);
                                return -1;
                        }

                        seq_len= PySequence_Size(value);
                        for(i=0; i<seq_len; i++) {
                                item= PySequence_GetItem(value, i);

                                if(item==NULL) {
                                        PyErr_Format(PyExc_TypeError,
                                                     "%.200s %.200s.%.200s failed to get sequence index '%d' for an RNA collection",
                                                     error_prefix, RNA_struct_identifier(ptr->type),
                                                     RNA_property_identifier(prop), i);
                                        Py_XDECREF(item);
                                        return -1;
                                }

                                if(PyDict_Check(item)==0) {
                                        PyErr_Format(PyExc_TypeError,
                                                     "%.200s %.200s.%.200s expected a each sequence "
                                                     "member to be a dict for an RNA collection, not %.200s",
                                                     error_prefix, RNA_struct_identifier(ptr->type),
                                                     RNA_property_identifier(prop), Py_TYPE(item)->tp_name);
                                        Py_XDECREF(item);
                                        return -1;
                                }

                                if(lb) {
                                        link= MEM_callocN(sizeof(CollectionPointerLink), "PyCollectionPointerLink");
                                        link->ptr= itemptr;
                                        BLI_addtail(lb, link);
                                }
                                else
                                        RNA_property_collection_add(ptr, prop, &itemptr);

                                if(pyrna_pydict_to_props(&itemptr, item, 1, "Converting a python list to an RNA collection")==-1) {
                                        PyObject *msg= PyC_ExceptionBuffer();
                                        const char *msg_char= _PyUnicode_AsString(msg);

                                        PyErr_Format(PyExc_TypeError,
                                                     "%.200s %.200s.%.200s error converting a member of a collection "
                                                     "from a dicts into an RNA collection, failed with: %s",
                                                     error_prefix, RNA_struct_identifier(ptr->type),
                                                     RNA_property_identifier(prop), msg_char);

                                        Py_DECREF(item);
                                        Py_DECREF(msg);
                                        return -1;
                                }
                                Py_DECREF(item);
                        }

                        break;
                }
                default:
                        PyErr_Format(PyExc_AttributeError,
                                     "%.200s %.200s.%.200s unknown property type (pyrna_py_to_prop)",
                                     error_prefix, RNA_struct_identifier(ptr->type),
                                     RNA_property_identifier(prop));
                        return -1;
                        break;
                }
        }

        /* Run rna property functions */
        if(RNA_property_update_check(prop)) {
                RNA_property_update(BPy_GetContext(), ptr, prop);
        }

        return 0;
}

static PyObject *pyrna_prop_array_to_py_index(BPy_PropertyArrayRNA *self, int index)
{
        PYRNA_PROP_CHECK_OBJ((BPy_PropertyRNA *)self)
        return pyrna_py_from_array_index(self, &self->ptr, self->prop, index);
}

static int pyrna_py_to_prop_array_index(BPy_PropertyArrayRNA *self, int index, PyObject *value)
{
        int ret= 0;
        PointerRNA *ptr= &self->ptr;
        PropertyRNA *prop= self->prop;

        const int totdim= RNA_property_array_dimension(ptr, prop, NULL);

        if (totdim > 1) {
                /* char error_str[512]; */
                if (pyrna_py_to_array_index(&self->ptr, self->prop, self->arraydim, self->arrayoffset, index, value, "") == -1) {
                        /* error is set */
                        ret= -1;
                }
        }
        else {
                /* see if we can coerce into a python type - PropertyType */
                switch (RNA_property_type(prop)) {
                case PROP_BOOLEAN:
                        {
                                int param= PyLong_AsLong(value);

                                if(param < 0 || param > 1) {
                                        PyErr_SetString(PyExc_TypeError, "expected True/False or 0/1");
                                        ret= -1;
                                }
                                else {
                                        RNA_property_boolean_set_index(ptr, prop, index, param);
                                }
                                break;
                        }
                case PROP_INT:
                        {
                                int param= PyLong_AsLong(value);
                                if (param==-1 && PyErr_Occurred()) {
                                        PyErr_SetString(PyExc_TypeError, "expected an int type");
                                        ret= -1;
                                }
                                else {
                                        RNA_property_int_clamp(ptr, prop, &param);
                                        RNA_property_int_set_index(ptr, prop, index, param);
                                }
                                break;
                        }
                case PROP_FLOAT:
                        {
                                float param= PyFloat_AsDouble(value);
                                if (PyErr_Occurred()) {
                                        PyErr_SetString(PyExc_TypeError, "expected a float type");
                                        ret= -1;
                                }
                                else {
                                        RNA_property_float_clamp(ptr, prop, &param);
                                        RNA_property_float_set_index(ptr, prop, index, param);
                                }
                                break;
                        }
                default:
                        PyErr_SetString(PyExc_AttributeError, "not an array type");
                        ret= -1;
                        break;
                }
        }

        /* Run rna property functions */
        if(RNA_property_update_check(prop)) {
                RNA_property_update(BPy_GetContext(), ptr, prop);
        }

        return ret;
}

//---------------sequence-------------------------------------------
static Py_ssize_t pyrna_prop_array_length(BPy_PropertyArrayRNA *self)
{
        PYRNA_PROP_CHECK_INT((BPy_PropertyRNA *)self)

        if (RNA_property_array_dimension(&self->ptr, self->prop, NULL) > 1)
                return RNA_property_multi_array_length(&self->ptr, self->prop, self->arraydim);
        else
                return RNA_property_array_length(&self->ptr, self->prop);
}

static Py_ssize_t pyrna_prop_collection_length(BPy_PropertyRNA *self)
{
        PYRNA_PROP_CHECK_INT(self)

        return RNA_property_collection_length(&self->ptr, self->prop);
}

/* bool functions are for speed, so we can avoid getting the length
 * of 1000's of items in a linked list for eg. */
static int pyrna_prop_array_bool(BPy_PropertyRNA *self)
{
        PYRNA_PROP_CHECK_INT(self)

        return RNA_property_array_length(&self->ptr, self->prop) ? 1 : 0;
}

static int pyrna_prop_collection_bool(BPy_PropertyRNA *self)
{
        /* no callback defined, just iterate and find the nth item */
        CollectionPropertyIterator iter;
        int test;

        PYRNA_PROP_CHECK_INT(self)

        RNA_property_collection_begin(&self->ptr, self->prop, &iter);
        test= iter.valid;
        RNA_property_collection_end(&iter);
        return test;
}

/* internal use only */
static PyObject *pyrna_prop_collection_subscript_int(BPy_PropertyRNA *self, Py_ssize_t keynum)
{
        PointerRNA newptr;
        Py_ssize_t keynum_abs= keynum;

        PYRNA_PROP_CHECK_OBJ(self)

        /* notice getting the length of the collection is avoided unless negative index is used
         * or to detect internal error with a valid index.
         * This is done for faster lookups. */
        if(keynum < 0) {
                keynum_abs += RNA_property_collection_length(&self->ptr, self->prop);

                if(keynum_abs < 0) {
                        PyErr_Format(PyExc_IndexError, "bpy_prop_collection[%d]: out of range.", keynum);
                        return NULL;
                }
        }

        if(RNA_property_collection_lookup_int(&self->ptr, self->prop, keynum_abs, &newptr)) {
                return pyrna_struct_CreatePyObject(&newptr);
        }
        else {
                const int len= RNA_property_collection_length(&self->ptr, self->prop);
                if(keynum_abs >= len) {
                        PyErr_Format(PyExc_IndexError,
                                     "bpy_prop_collection[index]: "
                                     "index %d out of range, size %d", keynum, len);
                }
                else {
                        PyErr_Format(PyExc_RuntimeError,
                                     "bpy_prop_collection[index]: internal error, "
                                     "valid index %d given in %d sized collection but value not found",
                                     keynum_abs, len);
                }

                return NULL;
        }
}

static PyObject *pyrna_prop_array_subscript_int(BPy_PropertyArrayRNA *self, int keynum)
{
        int len;

        PYRNA_PROP_CHECK_OBJ((BPy_PropertyRNA *)self)

        len= pyrna_prop_array_length(self);

        if(keynum < 0) keynum += len;

        if(keynum >= 0 && keynum < len)
                return pyrna_prop_array_to_py_index(self, keynum);

        PyErr_Format(PyExc_IndexError, "bpy_prop_array[index]: index %d out of range", keynum);
        return NULL;
}

static PyObject *pyrna_prop_collection_subscript_str(BPy_PropertyRNA *self, const char *keyname)
{
        PointerRNA newptr;

        PYRNA_PROP_CHECK_OBJ(self)

        if(RNA_property_collection_lookup_string(&self->ptr, self->prop, keyname, &newptr))
                return pyrna_struct_CreatePyObject(&newptr);

        PyErr_Format(PyExc_KeyError, "bpy_prop_collection[key]: key \"%.200s\" not found", keyname);
        return NULL;
}
/* static PyObject *pyrna_prop_array_subscript_str(BPy_PropertyRNA *self, char *keyname) */

static PyObject *pyrna_prop_collection_subscript_slice(BPy_PropertyRNA *self, Py_ssize_t start, Py_ssize_t stop)
{
        CollectionPropertyIterator rna_macro_iter;
        int count= 0;

        PyObject *list;
        PyObject *item;

        PYRNA_PROP_CHECK_OBJ(self)

        list= PyList_New(0);

        /* first loop up-until the start */
        for(RNA_property_collection_begin(&self->ptr, self->prop, &rna_macro_iter); rna_macro_iter.valid; RNA_property_collection_next(&rna_macro_iter)) {
                /* PointerRNA itemptr= rna_macro_iter.ptr; */
                if(count == start) {
                        break;
                }
                count++;
        }

        /* add items until stop */
        for(; rna_macro_iter.valid; RNA_property_collection_next(&rna_macro_iter)) {
                item= pyrna_struct_CreatePyObject(&rna_macro_iter.ptr);
                PyList_Append(list, item);
                Py_DECREF(item);

                count++;
                if(count == stop) {
                        break;
                }
        }

        RNA_property_collection_end(&rna_macro_iter);

        return list;
}

/* TODO - dimensions
 * note: could also use pyrna_prop_array_to_py_index(self, count) in a loop but its a lot slower
 * since at the moment it reads (and even allocates) the entire array for each index.
 */
static PyObject *pyrna_prop_array_subscript_slice(BPy_PropertyArrayRNA *self, PointerRNA *ptr, PropertyRNA *prop, Py_ssize_t start, Py_ssize_t stop, Py_ssize_t length)
{
        int count, totdim;
        PyObject *tuple;

        PYRNA_PROP_CHECK_OBJ((BPy_PropertyRNA *)self)

        tuple= PyTuple_New(stop - start);

        /* PYRNA_PROP_CHECK_OBJ(self) isn't needed, internal use only */

        totdim= RNA_property_array_dimension(ptr, prop, NULL);

        if (totdim > 1) {
                for (count= start; count < stop; count++)
                        PyTuple_SET_ITEM(tuple, count - start, pyrna_prop_array_to_py_index(self, count));
        }
        else {
                switch (RNA_property_type(prop)) {
                case PROP_FLOAT:
                        {
                                float values_stack[PYRNA_STACK_ARRAY];
                                float *values;
                                if(length > PYRNA_STACK_ARRAY)  {       values= PyMem_MALLOC(sizeof(float) * length); }
                                else                                                    {       values= values_stack; }
                                RNA_property_float_get_array(ptr, prop, values);

                                for(count=start; count<stop; count++)
                                        PyTuple_SET_ITEM(tuple, count-start, PyFloat_FromDouble(values[count]));

                                if(values != values_stack) {
                                        PyMem_FREE(values);
                                }
                                break;
                        }
                case PROP_BOOLEAN:
                        {
                                int values_stack[PYRNA_STACK_ARRAY];
                                int *values;
                                if(length > PYRNA_STACK_ARRAY)  {       values= PyMem_MALLOC(sizeof(int) * length); }
                                else                                                    {       values= values_stack; }

                                RNA_property_boolean_get_array(ptr, prop, values);
                                for(count=start; count<stop; count++)
                                        PyTuple_SET_ITEM(tuple, count-start, PyBool_FromLong(values[count]));

                                if(values != values_stack) {
                                        PyMem_FREE(values);
                                }
                                break;
                        }
                case PROP_INT:
                        {
                                int values_stack[PYRNA_STACK_ARRAY];
                                int *values;
                                if(length > PYRNA_STACK_ARRAY)  {       values= PyMem_MALLOC(sizeof(int) * length); }
                                else                                                    {       values= values_stack; }

                                RNA_property_int_get_array(ptr, prop, values);
                                for(count=start; count<stop; count++)
                                        PyTuple_SET_ITEM(tuple, count-start, PyLong_FromSsize_t(values[count]));

                                if(values != values_stack) {
                                        PyMem_FREE(values);
                                }
                                break;
                        }
                default:
                        BLI_assert(!"Invalid array type");

                        PyErr_SetString(PyExc_TypeError, "not an array type");
                        Py_DECREF(tuple);
                        tuple= NULL;
                }
        }
        return tuple;
}

static PyObject *pyrna_prop_collection_subscript(BPy_PropertyRNA *self, PyObject *key)
{
        PYRNA_PROP_CHECK_OBJ(self)

        if (PyUnicode_Check(key)) {
                return pyrna_prop_collection_subscript_str(self, _PyUnicode_AsString(key));
        }
        else if (PyIndex_Check(key)) {
                Py_ssize_t i= PyNumber_AsSsize_t(key, PyExc_IndexError);
                if (i == -1 && PyErr_Occurred())
                        return NULL;

                return pyrna_prop_collection_subscript_int(self, i);
        }
        else if (PySlice_Check(key)) {
                PySliceObject *key_slice= (PySliceObject *)key;
                Py_ssize_t step= 1;

                if(key_slice->step != Py_None && !_PyEval_SliceIndex(key, &step)) {
                        return NULL;
                }
                else if (step != 1) {
                        PyErr_SetString(PyExc_TypeError, "bpy_prop_collection[slice]: slice steps not supported");
                        return NULL;
                }
                else if(key_slice->start == Py_None && key_slice->stop == Py_None) {
                        return pyrna_prop_collection_subscript_slice(self, 0, PY_SSIZE_T_MAX);
                }
                else {
                        Py_ssize_t start= 0, stop= PY_SSIZE_T_MAX;

                        /* avoid PySlice_GetIndicesEx because it needs to know the length ahead of time. */
                        if(key_slice->start != Py_None && !_PyEval_SliceIndex(key_slice->start, &start))        return NULL;
                        if(key_slice->stop != Py_None && !_PyEval_SliceIndex(key_slice->stop, &stop))           return NULL;

                        if(start < 0 || stop < 0) {
                                /* only get the length for negative values */
                                Py_ssize_t len= (Py_ssize_t)RNA_property_collection_length(&self->ptr, self->prop);
                                if(start < 0) start += len;
                                if(stop < 0) start += len;
                        }

                        if (stop - start <= 0) {
                                return PyList_New(0);
                        }
                        else {
                                return pyrna_prop_collection_subscript_slice(self, start, stop);
                        }
                }
        }
        else {
                PyErr_Format(PyExc_TypeError,
                             "bpy_prop_collection[key]: invalid key, "
                             "must be a string or an int, not %.200s",
                             Py_TYPE(key)->tp_name);
                return NULL;
        }
}

static PyObject *pyrna_prop_array_subscript(BPy_PropertyArrayRNA *self, PyObject *key)
{
        PYRNA_PROP_CHECK_OBJ((BPy_PropertyRNA *)self)

        /*if (PyUnicode_Check(key)) {
                return pyrna_prop_array_subscript_str(self, _PyUnicode_AsString(key));
        }
        else */
        if (PyIndex_Check(key)) {
                Py_ssize_t i= PyNumber_AsSsize_t(key, PyExc_IndexError);
                if (i == -1 && PyErr_Occurred())
                        return NULL;
                return pyrna_prop_array_subscript_int(self, PyLong_AsLong(key));
        }
        else if (PySlice_Check(key)) {
                Py_ssize_t step= 1;
                PySliceObject *key_slice= (PySliceObject *)key;

                if(key_slice->step != Py_None && !_PyEval_SliceIndex(key, &step)) {
                        return NULL;
                }
                else if (step != 1) {
                        PyErr_SetString(PyExc_TypeError, "bpy_prop_array[slice]: slice steps not supported");
                        return NULL;
                }
                else if(key_slice->start == Py_None && key_slice->stop == Py_None) {
                        /* note, no significant advantage with optimizing [:] slice as with collections but include here for consistency with collection slice func */
                        Py_ssize_t len= (Py_ssize_t)pyrna_prop_array_length(self);
                        return pyrna_prop_array_subscript_slice(self, &self->ptr, self->prop, 0, len, len);
                }
                else {
                        int len= pyrna_prop_array_length(self);
                        Py_ssize_t start, stop, slicelength;

                        if (PySlice_GetIndicesEx((void *)key, len, &start, &stop, &step, &slicelength) < 0)
                                return NULL;

                        if (slicelength <= 0) {
                                return PyTuple_New(0);
                        }
                        else {
                                return pyrna_prop_array_subscript_slice(self, &self->ptr, self->prop, start, stop, len);
                        }
                }
        }
        else {
                PyErr_SetString(PyExc_AttributeError, "bpy_prop_array[key]: invalid key, key must be an int");
                return NULL;
        }
}

/* could call (pyrna_py_to_prop_array_index(self, i, value) in a loop but it is slow */
static int prop_subscript_ass_array_slice(PointerRNA *ptr, PropertyRNA *prop, int start, int stop, int length, PyObject *value_orig)
{
        PyObject *value;
        int count;
        void *values_alloc= NULL;
        int ret= 0;

        if(value_orig == NULL) {
                PyErr_SetString(PyExc_TypeError, "bpy_prop_array[slice]= value: deleting with list types is not supported by bpy_struct");
                return -1;
        }

        if(!(value=PySequence_Fast(value_orig, "bpy_prop_array[slice]= value: assignment is not a sequence type"))) {
                return -1;
        }

        if(PySequence_Fast_GET_SIZE(value) != stop-start) {
                Py_DECREF(value);
                PyErr_SetString(PyExc_TypeError, "bpy_prop_array[slice]= value: resizing bpy_struct arrays isn't supported");
                return -1;
        }

        switch (RNA_property_type(prop)) {
                case PROP_FLOAT:
                {
                        float values_stack[PYRNA_STACK_ARRAY];
                        float *values, fval;

                        float min, max;
                        RNA_property_float_range(ptr, prop, &min, &max);

                        if(length > PYRNA_STACK_ARRAY)  {       values= values_alloc= PyMem_MALLOC(sizeof(float) * length); }
                        else                                                    {       values= values_stack; }
                        if(start != 0 || stop != length) /* partial assignment? - need to get the array */
                                RNA_property_float_get_array(ptr, prop, values);

                        for(count=start; count<stop; count++) {
                                fval= PyFloat_AsDouble(PySequence_Fast_GET_ITEM(value, count-start));
                                CLAMP(fval, min, max);
                                values[count]= fval;
                        }

                        if(PyErr_Occurred())    ret= -1;
                        else                                    RNA_property_float_set_array(ptr, prop, values);
                        break;
                }
                case PROP_BOOLEAN:
                {
                        int values_stack[PYRNA_STACK_ARRAY];
                        int *values;
                        if(length > PYRNA_STACK_ARRAY)  {       values= values_alloc= PyMem_MALLOC(sizeof(int) * length); }
                        else                                                    {       values= values_stack; }

                        if(start != 0 || stop != length) /* partial assignment? - need to get the array */
                                RNA_property_boolean_get_array(ptr, prop, values);

                        for(count=start; count<stop; count++)
                                values[count]= PyLong_AsLong(PySequence_Fast_GET_ITEM(value, count-start));

                        if(PyErr_Occurred())    ret= -1;
                        else                                    RNA_property_boolean_set_array(ptr, prop, values);
                        break;
                }
                case PROP_INT:
                {
                        int values_stack[PYRNA_STACK_ARRAY];
                        int *values, ival;

                        int min, max;
                        RNA_property_int_range(ptr, prop, &min, &max);

                        if(length > PYRNA_STACK_ARRAY)  {       values= values_alloc= PyMem_MALLOC(sizeof(int) * length); }
                        else                                                    {       values= values_stack; }

                        if(start != 0 || stop != length) /* partial assignment? - need to get the array */
                                RNA_property_int_get_array(ptr, prop, values);

                        for(count=start; count<stop; count++) {
                                ival= PyLong_AsLong(PySequence_Fast_GET_ITEM(value, count-start));
                                CLAMP(ival, min, max);
                                values[count]= ival;
                        }

                        if(PyErr_Occurred())    ret= -1;
                        else                                    RNA_property_int_set_array(ptr, prop, values);
                        break;
                }
                default:
                        PyErr_SetString(PyExc_TypeError, "not an array type");
                        ret= -1;
        }

        Py_DECREF(value);

        if(values_alloc) {
                PyMem_FREE(values_alloc);
        }

        return ret;

}

static int prop_subscript_ass_array_int(BPy_PropertyArrayRNA *self, Py_ssize_t keynum, PyObject *value)
{
        int len;

        PYRNA_PROP_CHECK_INT((BPy_PropertyRNA *)self)

        len= pyrna_prop_array_length(self);

        if(keynum < 0) keynum += len;

        if(keynum >= 0 && keynum < len)
                return pyrna_py_to_prop_array_index(self, keynum, value);

        PyErr_SetString(PyExc_IndexError, "bpy_prop_array[index] = value: index out of range");
        return -1;
}

static int pyrna_prop_array_ass_subscript(BPy_PropertyArrayRNA *self, PyObject *key, PyObject *value)
{
        /* char *keyname= NULL; */ /* not supported yet */
        int ret= -1;

        PYRNA_PROP_CHECK_INT((BPy_PropertyRNA *)self);

        if (!RNA_property_editable_flag(&self->ptr, self->prop)) {
                PyErr_Format(PyExc_AttributeError,
                             "bpy_prop_collection: attribute \"%.200s\" from \"%.200s\" is read-only",
                             RNA_property_identifier(self->prop), RNA_struct_identifier(self->ptr.type));
                ret= -1;
        }

        else if (PyIndex_Check(key)) {
                Py_ssize_t i= PyNumber_AsSsize_t(key, PyExc_IndexError);
                if (i == -1 && PyErr_Occurred()) {
                        ret= -1;
                }
                else {
                        ret= prop_subscript_ass_array_int(self, i, value);
                }
        }
        else if (PySlice_Check(key)) {
                int len= RNA_property_array_length(&self->ptr, self->prop);
                Py_ssize_t start, stop, step, slicelength;

                if (PySlice_GetIndicesEx((void *)key, len, &start, &stop, &step, &slicelength) < 0) {
                        ret= -1;
                }
                else if (slicelength <= 0) {
                        ret= 0; /* do nothing */
                }
                else if (step == 1) {
                        ret= prop_subscript_ass_array_slice(&self->ptr, self->prop, start, stop, len, value);
                }
                else {
                        PyErr_SetString(PyExc_TypeError, "slice steps not supported with rna");
                        ret= -1;
                }
        }
        else {
                PyErr_SetString(PyExc_AttributeError, "invalid key, key must be an int");
                ret= -1;
        }

        if(ret != -1) {
                if(RNA_property_update_check(self->prop)) {
                        RNA_property_update(BPy_GetContext(), &self->ptr, self->prop);
                }
        }

        return ret;
}

/* for slice only */
static PyMappingMethods pyrna_prop_array_as_mapping= {
        (lenfunc) pyrna_prop_array_length,      /* mp_length */
        (binaryfunc) pyrna_prop_array_subscript,        /* mp_subscript */
        (objobjargproc) pyrna_prop_array_ass_subscript, /* mp_ass_subscript */
};

static PyMappingMethods pyrna_prop_collection_as_mapping= {
        (lenfunc) pyrna_prop_collection_length, /* mp_length */
        (binaryfunc) pyrna_prop_collection_subscript,   /* mp_subscript */
        (objobjargproc) NULL,   /* mp_ass_subscript */
};

/* only for fast bool's, large structs, assign nb_bool on init */
static PyNumberMethods pyrna_prop_array_as_number= {
        NULL, /* nb_add */
        NULL, /* nb_subtract */
        NULL, /* nb_multiply */
        NULL, /* nb_remainder */
        NULL, /* nb_divmod */
        NULL, /* nb_power */
        NULL, /* nb_negative */
        NULL, /* nb_positive */
        NULL, /* nb_absolute */
        (inquiry) pyrna_prop_array_bool, /* nb_bool */
};
static PyNumberMethods pyrna_prop_collection_as_number= {
        NULL, /* nb_add */
        NULL, /* nb_subtract */
        NULL, /* nb_multiply */
        NULL, /* nb_remainder */
        NULL, /* nb_divmod */
        NULL, /* nb_power */
        NULL, /* nb_negative */
        NULL, /* nb_positive */
        NULL, /* nb_absolute */
        (inquiry) pyrna_prop_collection_bool, /* nb_bool */
};

static int pyrna_prop_array_contains(BPy_PropertyRNA *self, PyObject *value)
{
        return pyrna_array_contains_py(&self->ptr, self->prop, value);
}

static int pyrna_prop_collection_contains(BPy_PropertyRNA *self, PyObject *value)
{
        PointerRNA newptr; /* not used, just so RNA_property_collection_lookup_string runs */

        /* key in dict style check */
        const char *keyname= _PyUnicode_AsString(value);

        if(keyname==NULL) {
                PyErr_SetString(PyExc_TypeError, "bpy_prop_collection.__contains__: expected a string");
                return -1;
        }

        if (RNA_property_collection_lookup_string(&self->ptr, self->prop, keyname, &newptr))
                return 1;

        return 0;
}

static int pyrna_struct_contains(BPy_StructRNA *self, PyObject *value)
{
        IDProperty *group;
        const char *name= _PyUnicode_AsString(value);

        PYRNA_STRUCT_CHECK_INT(self)

        if (!name) {
                PyErr_SetString(PyExc_TypeError, "bpy_struct.__contains__: expected a string");
                return -1;
        }

        if(RNA_struct_idprops_check(self->ptr.type)==0) {
                PyErr_SetString(PyExc_TypeError, "bpy_struct: this type doesn't support IDProperties");
                return -1;
        }

        group= RNA_struct_idprops(&self->ptr, 0);

        if(!group)
                return 0;

        return IDP_GetPropertyFromGroup(group, name) ? 1:0;
}

static PySequenceMethods pyrna_prop_array_as_sequence= {
        (lenfunc)pyrna_prop_array_length,               /* Cant set the len otherwise it can evaluate as false */
        NULL,           /* sq_concat */
        NULL,           /* sq_repeat */
        (ssizeargfunc)pyrna_prop_array_subscript_int, /* sq_item */ /* Only set this so PySequence_Check() returns True */
        NULL,           /* sq_slice */
        (ssizeobjargproc)prop_subscript_ass_array_int,          /* sq_ass_item */
        NULL,           /* *was* sq_ass_slice */
        (objobjproc)pyrna_prop_array_contains,  /* sq_contains */
        (binaryfunc) NULL, /* sq_inplace_concat */
        (ssizeargfunc) NULL, /* sq_inplace_repeat */
};

static PySequenceMethods pyrna_prop_collection_as_sequence= {
        (lenfunc)pyrna_prop_collection_length,          /* Cant set the len otherwise it can evaluate as false */
        NULL,           /* sq_concat */
        NULL,           /* sq_repeat */
        (ssizeargfunc)pyrna_prop_collection_subscript_int, /* sq_item */ /* Only set this so PySequence_Check() returns True */
        NULL,           /* *was* sq_slice */
        NULL,           /* sq_ass_item */
        NULL,           /* *was* sq_ass_slice */
        (objobjproc)pyrna_prop_collection_contains,     /* sq_contains */
        (binaryfunc) NULL, /* sq_inplace_concat */
        (ssizeargfunc) NULL, /* sq_inplace_repeat */
};

static PySequenceMethods pyrna_struct_as_sequence= {
        NULL,           /* Cant set the len otherwise it can evaluate as false */
        NULL,           /* sq_concat */
        NULL,           /* sq_repeat */
        NULL,           /* sq_item */ /* Only set this so PySequence_Check() returns True */
        NULL,           /* *was* sq_slice */
        NULL,           /* sq_ass_item */
        NULL,           /* *was* sq_ass_slice */
        (objobjproc)pyrna_struct_contains,      /* sq_contains */
        (binaryfunc) NULL, /* sq_inplace_concat */
        (ssizeargfunc) NULL, /* sq_inplace_repeat */
};

static PyObject *pyrna_struct_subscript(BPy_StructRNA *self, PyObject *key)
{
        /* mostly copied from BPy_IDGroup_Map_GetItem */
        IDProperty *group, *idprop;
        const char *name= _PyUnicode_AsString(key);

        PYRNA_STRUCT_CHECK_OBJ(self)

        if(RNA_struct_idprops_check(self->ptr.type)==0) {
                PyErr_SetString(PyExc_TypeError, "this type doesn't support IDProperties");
                return NULL;
        }

        if(name==NULL) {
                PyErr_SetString(PyExc_TypeError, "bpy_struct[key]: only strings are allowed as keys of ID properties");
                return NULL;
        }

        group= RNA_struct_idprops(&self->ptr, 0);

        if(group==NULL) {
                PyErr_Format(PyExc_KeyError, "bpy_struct[key]: key \"%s\" not found", name);
                return NULL;
        }

        idprop= IDP_GetPropertyFromGroup(group, name);

        if(idprop==NULL) {
                PyErr_Format(PyExc_KeyError, "bpy_struct[key]: key \"%s\" not found", name);
                return NULL;
        }

        return BPy_IDGroup_WrapData(self->ptr.id.data, idprop);
}

static int pyrna_struct_ass_subscript(BPy_StructRNA *self, PyObject *key, PyObject *value)
{
        IDProperty *group;

        PYRNA_STRUCT_CHECK_INT(self)

        group= RNA_struct_idprops(&self->ptr, 1);

#ifdef USE_PEDANTIC_WRITE
        if(rna_disallow_writes && rna_id_write_error(&self->ptr, key)) {
                return -1;
        }
#endif // USE_STRING_COERCE

        if(group==NULL) {
                PyErr_SetString(PyExc_TypeError, "bpy_struct[key]= val: id properties not supported for this type");
                return -1;
        }

        return BPy_Wrap_SetMapItem(group, key, value);
}

static PyMappingMethods pyrna_struct_as_mapping= {
        (lenfunc) NULL, /* mp_length */
        (binaryfunc) pyrna_struct_subscript,    /* mp_subscript */
        (objobjargproc) pyrna_struct_ass_subscript,     /* mp_ass_subscript */
};

PyDoc_STRVAR(pyrna_struct_keys_doc,
".. method:: keys()\n"
"\n"
"   Returns the keys of this objects custom properties (matches pythons\n"
"   dictionary function of the same name).\n"
"\n"
"   :return: custom property keys.\n"
"   :rtype: list of strings\n"
"\n"
"   .. note:: Only :class:`ID`, :class:`Bone` and :class:`PoseBone` classes\n"
"      support custom properties.\n"
);
static PyObject *pyrna_struct_keys(BPy_PropertyRNA *self)
{
        IDProperty *group;

        if(RNA_struct_idprops_check(self->ptr.type)==0) {
                PyErr_SetString(PyExc_TypeError, "bpy_struct.keys(): this type doesn't support IDProperties");
                return NULL;
        }

        group= RNA_struct_idprops(&self->ptr, 0);

        if(group==NULL)
                return PyList_New(0);

        return BPy_Wrap_GetKeys(group);
}

PyDoc_STRVAR(pyrna_struct_items_doc,
".. method:: items()\n"
"\n"
"   Returns the items of this objects custom properties (matches pythons\n"
"   dictionary function of the same name).\n"
"\n"
"   :return: custom property key, value pairs.\n"
"   :rtype: list of key, value tuples\n"
"\n"
"   .. note:: Only :class:`ID`, :class:`Bone` and :class:`PoseBone`\n"
"      classes support custom properties.\n"
);
static PyObject *pyrna_struct_items(BPy_PropertyRNA *self)
{
        IDProperty *group;

        if(RNA_struct_idprops_check(self->ptr.type)==0) {
                PyErr_SetString(PyExc_TypeError, "bpy_struct.items(): this type doesn't support IDProperties");
                return NULL;
        }

        group= RNA_struct_idprops(&self->ptr, 0);

        if(group==NULL)
                return PyList_New(0);

        return BPy_Wrap_GetItems(self->ptr.id.data, group);
}

PyDoc_STRVAR(pyrna_struct_values_doc,
".. method:: values()\n"
"\n"
"   Returns the values of this objects custom properties (matches pythons\n"
"   dictionary function of the same name).\n"
"\n"
"   :return: custom property values.\n"
"   :rtype: list\n"
"\n"
"   .. note:: Only :class:`ID`, :class:`Bone` and :class:`PoseBone`\n"
"      classes support custom properties.\n"
);
static PyObject *pyrna_struct_values(BPy_PropertyRNA *self)
{
        IDProperty *group;

        if(RNA_struct_idprops_check(self->ptr.type)==0) {
                PyErr_SetString(PyExc_TypeError, "bpy_struct.values(): this type doesn't support IDProperties");
                return NULL;
        }

        group= RNA_struct_idprops(&self->ptr, 0);

        if(group==NULL)
                return PyList_New(0);

        return BPy_Wrap_GetValues(self->ptr.id.data, group);
}


PyDoc_STRVAR(pyrna_struct_is_property_set_doc,
".. method:: is_property_set(property)\n"
"\n"
"   Check if a property is set, use for testing operator properties.\n"
"\n"
"   :return: True when the property has been set.\n"
"   :rtype: boolean\n"
);
static PyObject *pyrna_struct_is_property_set(BPy_StructRNA *self, PyObject *args)
{
        PropertyRNA *prop;
        const char *name;
        int ret;

        PYRNA_STRUCT_CHECK_OBJ(self)

        if (!PyArg_ParseTuple(args, "s:is_property_set", &name))
                return NULL;

        if((prop= RNA_struct_find_property(&self->ptr, name)) == NULL) {
                PyErr_Format(PyExc_TypeError,
                             "%.200s.is_property_set(\"%.200s\") not found",
                             RNA_struct_identifier(self->ptr.type), name);
                return NULL;
        }

        /* double property lookup, could speed up */
        /* return PyBool_FromLong(RNA_property_is_set(&self->ptr, name)); */
        if(RNA_property_flag(prop) & PROP_IDPROPERTY) {
                IDProperty *group= RNA_struct_idprops(&self->ptr, 0);
                if(group) {
                        ret= IDP_GetPropertyFromGroup(group, name) ? 1:0;
                }
                else {
                        ret= 0;
                }
        }
        else {
                ret= 1;
        }

        return PyBool_FromLong(ret);
}

PyDoc_STRVAR(pyrna_struct_is_property_hidden_doc,
".. method:: is_property_hidden(property)\n"
"\n"
"   Check if a property is hidden.\n"
"\n"
"   :return: True when the property is hidden.\n"
"   :rtype: boolean\n"
);
static PyObject *pyrna_struct_is_property_hidden(BPy_StructRNA *self, PyObject *args)
{
        PropertyRNA *prop;
        const char *name;

        PYRNA_STRUCT_CHECK_OBJ(self)

        if (!PyArg_ParseTuple(args, "s:is_property_hidden", &name))
                return NULL;

        if((prop= RNA_struct_find_property(&self->ptr, name)) == NULL) {
                PyErr_Format(PyExc_TypeError,
                             "%.200s.is_property_hidden(\"%.200s\") not found",
                             RNA_struct_identifier(self->ptr.type), name);
                return NULL;
        }

        return PyBool_FromLong(RNA_property_flag(prop) & PROP_HIDDEN);
}

PyDoc_STRVAR(pyrna_struct_path_resolve_doc,
".. method:: path_resolve(path, coerce=True)\n"
"\n"
"   Returns the property from the path, raise an exception when not found.\n"
"\n"
"   :arg path: path which this property resolves.\n"
"   :type path: string\n"
"   :arg coerce: optional argument, when True, the property will be converted\n"
"      into its python representation.\n"
"   :type coerce: boolean\n"
);
static PyObject *pyrna_struct_path_resolve(BPy_StructRNA *self, PyObject *args)
{
        const char *path;
        PyObject *coerce= Py_True;
        PointerRNA r_ptr;
        PropertyRNA *r_prop;
        int index= -1;

        PYRNA_STRUCT_CHECK_OBJ(self)

        if (!PyArg_ParseTuple(args, "s|O!:path_resolve", &path, &PyBool_Type, &coerce))
                return NULL;

        if (RNA_path_resolve_full(&self->ptr, path, &r_ptr, &r_prop, &index)) {
                if(r_prop) {
                        if(index != -1) {
                                if(index >= RNA_property_array_length(&r_ptr, r_prop) || index < 0) {
                                        PyErr_Format(PyExc_TypeError,
                                                     "%.200s.path_resolve(\"%.200s\") index out of range",
                                                     RNA_struct_identifier(self->ptr.type), path);
                                        return NULL;
                                }
                                else {
                                        return pyrna_array_index(&r_ptr, r_prop, index);
                                }
                        }
                        else {
                                if(coerce == Py_False) {
                                        return pyrna_prop_CreatePyObject(&r_ptr, r_prop);
                                }
                                else {
                                        return pyrna_prop_to_py(&r_ptr, r_prop);
                                }
                        }
                }
                else {
                        return pyrna_struct_CreatePyObject(&r_ptr);
                }
        }
        else {
                PyErr_Format(PyExc_TypeError,
                             "%.200s.path_resolve(\"%.200s\") could not be resolved",
                             RNA_struct_identifier(self->ptr.type), path);
                return NULL;
        }
}

PyDoc_STRVAR(pyrna_struct_path_from_id_doc,
".. method:: path_from_id(property=\"\")\n"
"\n"
"   Returns the data path from the ID to this object (string).\n"
"\n"
"   :arg property: Optional property name which can be used if the path is\n"
"      to a property of this object.\n"
"   :type property: string\n"
"   :return: The path from :class:`bpy_struct.id_data`\n"
"      to this struct and property (when given).\n"
"   :rtype: str\n"
);
static PyObject *pyrna_struct_path_from_id(BPy_StructRNA *self, PyObject *args)
{
        const char *name= NULL;
        const char *path;
        PropertyRNA *prop;
        PyObject *ret;

        PYRNA_STRUCT_CHECK_OBJ(self)

        if (!PyArg_ParseTuple(args, "|s:path_from_id", &name))
                return NULL;

        if(name) {
                prop= RNA_struct_find_property(&self->ptr, name);
                if(prop==NULL) {
                        PyErr_Format(PyExc_TypeError,
                                     "%.200s.path_from_id(\"%.200s\") not found",
                                     RNA_struct_identifier(self->ptr.type), name);
                        return NULL;
                }

                path= RNA_path_from_ID_to_property(&self->ptr, prop);
        }
        else {
                path= RNA_path_from_ID_to_struct(&self->ptr);
        }

        if(path==NULL) {
                if(name) {
                        PyErr_Format(PyExc_TypeError,
                                     "%.200s.path_from_id(\"%s\") found but does not support path creation",
                                     RNA_struct_identifier(self->ptr.type), name);
                }
                else {
                        PyErr_Format(PyExc_TypeError,
                                     "%.200s.path_from_id() does not support path creation for this type",
                                     RNA_struct_identifier(self->ptr.type));
                }
                return NULL;
        }

        ret= PyUnicode_FromString(path);
        MEM_freeN((void *)path);

        return ret;
}

PyDoc_STRVAR(pyrna_prop_path_from_id_doc,
".. method:: path_from_id()\n"
"\n"
"   Returns the data path from the ID to this property (string).\n"
"\n"
"   :return: The path from :class:`bpy_struct.id_data` to this property.\n"
"   :rtype: str\n"
);
static PyObject *pyrna_prop_path_from_id(BPy_PropertyRNA *self)
{
        const char *path;
        PropertyRNA *prop= self->prop;
        PyObject *ret;

        path= RNA_path_from_ID_to_property(&self->ptr, self->prop);

        if(path==NULL) {
                PyErr_Format(PyExc_TypeError,
                             "%.200s.%.200s.path_from_id() does not support path creation for this type",
                             RNA_struct_identifier(self->ptr.type), RNA_property_identifier(prop));
                return NULL;
        }

        ret= PyUnicode_FromString(path);
        MEM_freeN((void *)path);

        return ret;
}

PyDoc_STRVAR(pyrna_struct_type_recast_doc,
".. method:: type_recast()\n"
"\n"
"   Return a new instance, this is needed because types\n"
"   such as textures can be changed at runtime.\n"
"\n"
"   :return: a new instance of this object with the type initialized again.\n"
"   :rtype: subclass of :class:`bpy_struct`\n"
);
static PyObject *pyrna_struct_type_recast(BPy_StructRNA *self)
{
        PointerRNA r_ptr;

        PYRNA_STRUCT_CHECK_OBJ(self)

        RNA_pointer_recast(&self->ptr, &r_ptr);
        return pyrna_struct_CreatePyObject(&r_ptr);
}

static void pyrna_dir_members_py(PyObject *list, PyObject *self)
{
        PyObject *dict;
        PyObject **dict_ptr;
        PyObject *list_tmp;

        dict_ptr= _PyObject_GetDictPtr((PyObject *)self);

        if(dict_ptr && (dict=*dict_ptr)) {
                list_tmp= PyDict_Keys(dict);
                PyList_SetSlice(list, INT_MAX, INT_MAX, list_tmp);
                Py_DECREF(list_tmp);
        }

        dict= ((PyTypeObject *)Py_TYPE(self))->tp_dict;
        if(dict) {
                list_tmp= PyDict_Keys(dict);
                PyList_SetSlice(list, INT_MAX, INT_MAX, list_tmp);
                Py_DECREF(list_tmp);
        }
}

static void pyrna_dir_members_rna(PyObject *list, PointerRNA *ptr)
{
        PyObject *pystring;
        const char *idname;

        /* for looping over attrs and funcs */
        PointerRNA tptr;
        PropertyRNA *iterprop;

        {
                RNA_pointer_create(NULL, &RNA_Struct, ptr->type, &tptr);
                iterprop= RNA_struct_find_property(&tptr, "functions");

                RNA_PROP_BEGIN(&tptr, itemptr, iterprop) {
                        idname= RNA_function_identifier(itemptr.data);

                        pystring= PyUnicode_FromString(idname);
                        PyList_Append(list, pystring);
                        Py_DECREF(pystring);
                }
                RNA_PROP_END;
        }

        {
                /*
                 * Collect RNA attributes
                 */
                char name[256], *nameptr;

                iterprop= RNA_struct_iterator_property(ptr->type);

                RNA_PROP_BEGIN(ptr, itemptr, iterprop) {
                        nameptr= RNA_struct_name_get_alloc(&itemptr, name, sizeof(name));

                        if(nameptr) {
                                pystring= PyUnicode_FromString(nameptr);
                                PyList_Append(list, pystring);
                                Py_DECREF(pystring);

                                if(name != nameptr)
                                        MEM_freeN(nameptr);
                        }
                }
                RNA_PROP_END;
        }
}


static PyObject *pyrna_struct_dir(BPy_StructRNA *self)
{
        PyObject *ret;
        PyObject *pystring;

        PYRNA_STRUCT_CHECK_OBJ(self)

        /* Include this incase this instance is a subtype of a python class
         * In these instances we may want to return a function or variable provided by the subtype
         * */
        ret= PyList_New(0);

        if (!BPy_StructRNA_CheckExact(self))
                pyrna_dir_members_py(ret, (PyObject *)self);

        pyrna_dir_members_rna(ret, &self->ptr);

        if(self->ptr.type == &RNA_Context) {
                ListBase lb= CTX_data_dir_get(self->ptr.data);
                LinkData *link;

                for(link=lb.first; link; link=link->next) {
                        pystring= PyUnicode_FromString(link->data);
                        PyList_Append(ret, pystring);
                        Py_DECREF(pystring);
                }

                BLI_freelistN(&lb);
        }

        {
                /* set(), this is needed to remove-doubles because the deferred
                 * register-props will be in both the python __dict__ and accessed as RNA */

                PyObject *set= PySet_New(ret);

                Py_DECREF(ret);
                ret= PySequence_List(set);
                Py_DECREF(set);
        }

        return ret;
}

//---------------getattr--------------------------------------------
static PyObject *pyrna_struct_getattro(BPy_StructRNA *self, PyObject *pyname)
{
        const char *name= _PyUnicode_AsString(pyname);
        PyObject *ret;
        PropertyRNA *prop;
        FunctionRNA *func;

        PYRNA_STRUCT_CHECK_OBJ(self)

        if(name == NULL) {
                PyErr_SetString(PyExc_AttributeError, "bpy_struct: __getattr__ must be a string");
                ret= NULL;
        }
        else if(name[0]=='_') { // rna can't start with a "_", so for __dict__ and similar we can skip using rna lookups
                /* annoying exception, maybe we need to have different types for this... */
                if((strcmp(name, "__getitem__")==0 || strcmp(name, "__setitem__")==0) && !RNA_struct_idprops_check(self->ptr.type)) {
                        PyErr_SetString(PyExc_AttributeError, "bpy_struct: no __getitem__ support for this type");
                        ret= NULL;
                }
                else {
                        ret= PyObject_GenericGetAttr((PyObject *)self, pyname);
                }
        }
        else if ((prop= RNA_struct_find_property(&self->ptr, name))) {
                ret= pyrna_prop_to_py(&self->ptr, prop);
        }
        /* RNA function only if callback is declared (no optional functions) */
        else if ((func= RNA_struct_find_function(&self->ptr, name)) && RNA_function_defined(func)) {
                ret= pyrna_func_to_py(&self->ptr, func);
        }
        else if (self->ptr.type == &RNA_Context) {
                bContext *C= self->ptr.data;
                if(C==NULL) {
                        PyErr_Format(PyExc_AttributeError, "bpy_struct: Context is 'NULL', can't get \"%.200s\" from context", name);
                        ret= NULL;
                }
                else {
                        PointerRNA newptr;
                        ListBase newlb;
                        short newtype;

                        int done= CTX_data_get(C, name, &newptr, &newlb, &newtype);

                        if(done==1) { /* found */
                                switch(newtype) {
                                case CTX_DATA_TYPE_POINTER:
                                        if(newptr.data == NULL) {
                                                ret= Py_None;
                                                Py_INCREF(ret);
                                        }
                                        else {
                                                ret= pyrna_struct_CreatePyObject(&newptr);
                                        }
                                        break;
                                case CTX_DATA_TYPE_COLLECTION:
                                        {
                                                CollectionPointerLink *link;
                                                PyObject *linkptr;

                                                ret= PyList_New(0);

                                                for(link=newlb.first; link; link=link->next) {
                                                        linkptr= pyrna_struct_CreatePyObject(&link->ptr);
                                                        PyList_Append(ret, linkptr);
                                                        Py_DECREF(linkptr);
                                                }
                                        }
                                        break;
                                default:
                                        /* should never happen */
                                        BLI_assert(!"Invalid context type");

                                        PyErr_Format(PyExc_AttributeError,
                                                     "bpy_struct: Context type invalid %d, can't get \"%.200s\" from context",
                                                     newtype, name);
                                        ret= NULL;
                                }
                        }
                        else if (done==-1) { /* found but not set */
                                ret= Py_None;
                                Py_INCREF(ret);
                        }
                        else { /* not found in the context */
                                /* lookup the subclass. raise an error if its not found */
                                ret= PyObject_GenericGetAttr((PyObject *)self, pyname);
                        }

                        BLI_freelistN(&newlb);
                }
        }
        else {
#if 0
                PyErr_Format(PyExc_AttributeError, "bpy_struct: attribute \"%.200s\" not found", name);
                ret= NULL;
#endif
                /* Include this incase this instance is a subtype of a python class
                 * In these instances we may want to return a function or variable provided by the subtype
                 *
                 * Also needed to return methods when its not a subtype
                 * */

                /* The error raised here will be displayed */
                ret= PyObject_GenericGetAttr((PyObject *)self, pyname);
        }

        return ret;
}

#if 0
static int pyrna_struct_pydict_contains(PyObject *self, PyObject *pyname)
{
        PyObject *dict= *(_PyObject_GetDictPtr((PyObject *)self));
        if (dict==NULL) /* unlikely */
                return 0;

        return PyDict_Contains(dict, pyname);
}
#endif

//--------------- setattr-------------------------------------------
static int pyrna_is_deferred_prop(PyObject *value)
{
        return PyTuple_CheckExact(value) && PyTuple_GET_SIZE(value)==2 && PyCallable_Check(PyTuple_GET_ITEM(value, 0)) && PyDict_CheckExact(PyTuple_GET_ITEM(value, 1));
}

#if 0
static PyObject *pyrna_struct_meta_idprop_getattro(PyObject *cls, PyObject *attr)
{
        PyObject *ret= PyType_Type.tp_getattro(cls, attr);

        /* Allows:
         * >>> bpy.types.Scene.foo= BoolProperty()
         * >>> bpy.types.Scene.foo
         * <bpy_struct, BooleanProperty("foo")>
         * ...rather than returning the deferred class register tuple as checked by pyrna_is_deferred_prop()
         *
         * Disable for now, this is faking internal behavior in a way thats too tricky to maintain well. */
#if 0
        if(ret == NULL) { // || pyrna_is_deferred_prop(ret)
                StructRNA *srna= srna_from_self(cls, "StructRNA.__getattr__");
                if(srna) {
                        PropertyRNA *prop= RNA_struct_type_find_property(srna, _PyUnicode_AsString(attr));
                        if(prop) {
                                PointerRNA tptr;
                                PyErr_Clear(); /* clear error from tp_getattro */
                                RNA_pointer_create(NULL, &RNA_Property, prop, &tptr);
                                ret= pyrna_struct_CreatePyObject(&tptr);
                        }
                }
        }
#endif

        return ret;
}
#endif

static int pyrna_struct_meta_idprop_setattro(PyObject *cls, PyObject *attr, PyObject *value)
{
        StructRNA *srna= srna_from_self(cls, "StructRNA.__setattr__");
        const int is_deferred_prop= (value && pyrna_is_deferred_prop(value));

        if(srna && !pyrna_write_check() && (is_deferred_prop || RNA_struct_type_find_property(srna, _PyUnicode_AsString(attr)))) {
                PyErr_Format(PyExc_AttributeError,
                             "pyrna_struct_meta_idprop_setattro() "
                             "can't set in readonly state '%.200s.%S'",
                             ((PyTypeObject *)cls)->tp_name, attr);
                return -1;
        }

        if(srna == NULL) {
                /* allow setting on unregistered classes which can be registered later on */
                /*
                if(value && is_deferred_prop) {
                        PyErr_Format(PyExc_AttributeError,
                                     "pyrna_struct_meta_idprop_setattro() unable to get srna from class '%.200s'",
                                     ((PyTypeObject *)cls)->tp_name);
                        return -1;
                }
                */
                /* srna_from_self may set an error */
                PyErr_Clear();
                return PyType_Type.tp_setattro(cls, attr, value);
        }

        if(value) {
                /* check if the value is a property */
                if(is_deferred_prop) {
                        int ret= deferred_register_prop(srna, attr, value);
                        if(ret == -1) {
                                /* error set */
                                return ret;
                        }

                        /* pass through and assign to the classes __dict__ as well
                         * when the value isn't assigned it still creates the RNA property
                         * but gets confusing from script writers POV if the assigned value cant be read back. */
                }
                else {
                        /* remove existing property if its set or we also end up with confusion */
                        const char *attr_str= _PyUnicode_AsString(attr);
                        RNA_def_property_free_identifier(srna, attr_str); /* ignore on failure */
                }
        }
        else { /* __delattr__ */
                /* first find if this is a registered property */
                const char *attr_str= _PyUnicode_AsString(attr);
                int ret= RNA_def_property_free_identifier(srna, attr_str);
                if (ret == -1) {
                        PyErr_Format(PyExc_TypeError, "struct_meta_idprop.detattr(): '%s' not a dynamic property", attr_str);
                        return -1;
                }
        }

        /* fallback to standard py, delattr/setattr */
        return PyType_Type.tp_setattro(cls, attr, value);
}

static int pyrna_struct_setattro(BPy_StructRNA *self, PyObject *pyname, PyObject *value)
{
        const char *name= _PyUnicode_AsString(pyname);
        PropertyRNA *prop= NULL;

        PYRNA_STRUCT_CHECK_INT(self)

#ifdef USE_PEDANTIC_WRITE
        if(rna_disallow_writes && rna_id_write_error(&self->ptr, pyname)) {
                return -1;
        }
#endif // USE_STRING_COERCE

        if(name == NULL) {
                PyErr_SetString(PyExc_AttributeError, "bpy_struct: __setattr__ must be a string");
                return -1;
        }
        else if (name[0] != '_' && (prop= RNA_struct_find_property(&self->ptr, name))) {
                if (!RNA_property_editable_flag(&self->ptr, prop)) {
                        PyErr_Format(PyExc_AttributeError,
                                     "bpy_struct: attribute \"%.200s\" from \"%.200s\" is read-only",
                                     RNA_property_identifier(prop), RNA_struct_identifier(self->ptr.type));
                        return -1;
                }
        }
        else if (self->ptr.type == &RNA_Context) {
                /* code just raises correct error, context prop's cant be set, unless its apart of the py class */
                bContext *C= self->ptr.data;
                if(C==NULL) {
                        PyErr_Format(PyExc_AttributeError, "bpy_struct: Context is 'NULL', can't set \"%.200s\" from context", name);
                        return -1;
                }
                else {
                        PointerRNA newptr;
                        ListBase newlb;
                        short newtype;

                        int done= CTX_data_get(C, name, &newptr, &newlb, &newtype);

                        if(done==1) {
                                PyErr_Format(PyExc_AttributeError, "bpy_struct: Context property \"%.200s\" is read-only", name);
                                BLI_freelistN(&newlb);
                                return -1;
                        }

                        BLI_freelistN(&newlb);
                }
        }

        /* pyrna_py_to_prop sets its own exceptions */
        if(prop) {
                if(value == NULL) {
                        PyErr_SetString(PyExc_AttributeError, "bpy_struct: del not supported");
                        return -1;
                }
                return pyrna_py_to_prop(&self->ptr, prop, NULL, value, "bpy_struct: item.attr= val:");
        }
        else {
                return PyObject_GenericSetAttr((PyObject *)self, pyname, value);
        }
}

static PyObject *pyrna_prop_dir(BPy_PropertyRNA *self)
{
        PyObject *ret;
        PointerRNA r_ptr;

        /* Include this incase this instance is a subtype of a python class
         * In these instances we may want to return a function or variable provided by the subtype
         * */
        ret= PyList_New(0);

        if (!BPy_PropertyRNA_CheckExact(self)) {
                pyrna_dir_members_py(ret, (PyObject *)self);
        }

        if(RNA_property_type(self->prop) == PROP_COLLECTION) {
                if(RNA_property_collection_type_get(&self->ptr, self->prop, &r_ptr)) {
                        pyrna_dir_members_rna(ret, &r_ptr);
                }
        }

        return ret;
}


static PyObject *pyrna_prop_array_getattro(BPy_PropertyRNA *self, PyObject *pyname)
{
        return PyObject_GenericGetAttr((PyObject *)self, pyname);
}

static PyObject *pyrna_prop_collection_getattro(BPy_PropertyRNA *self, PyObject *pyname)
{
        const char *name= _PyUnicode_AsString(pyname);

        if(name == NULL) {
                PyErr_SetString(PyExc_AttributeError, "bpy_prop_collection: __getattr__ must be a string");
                return NULL;
        }
        else if(name[0] != '_') {
                PyObject *ret;
                PropertyRNA *prop;
                FunctionRNA *func;

                PointerRNA r_ptr;
                if(RNA_property_collection_type_get(&self->ptr, self->prop, &r_ptr)) {
                        if ((prop= RNA_struct_find_property(&r_ptr, name))) {
                                ret= pyrna_prop_to_py(&r_ptr, prop);

                                return ret;
                        }
                        else if ((func= RNA_struct_find_function(&r_ptr, name))) {
                                PyObject *self_collection= pyrna_struct_CreatePyObject(&r_ptr);
                                ret= pyrna_func_to_py(&((BPy_DummyPointerRNA *)self_collection)->ptr, func);
                                Py_DECREF(self_collection);

                                return ret;
                        }
                }
        }

#if 0
        return PyObject_GenericGetAttr((PyObject *)self, pyname);
#else
        {
                /* Could just do this except for 1 awkward case.
                 * PyObject_GenericGetAttr((PyObject *)self, pyname);
                 * so as to support 'bpy.data.library.load()'
                 * note, this _only_ supports static methods */

                PyObject *ret= PyObject_GenericGetAttr((PyObject *)self, pyname);

                if(ret == NULL && name[0] != '_') { /* avoid inheriting __call__ and similar */
                        /* since this is least common case, handle it last */
                        PointerRNA r_ptr;
                        if(RNA_property_collection_type_get(&self->ptr, self->prop, &r_ptr)) {
                                PyObject *cls;

                                PyObject *error_type, *error_value, *error_traceback;
                                PyErr_Fetch(&error_type, &error_value, &error_traceback);
                                PyErr_Clear();

                                cls= pyrna_struct_Subtype(&r_ptr); /* borrows */
                                ret= PyObject_GenericGetAttr(cls, pyname);
                                /* restore the original error */
                                if(ret == NULL) {
                                        PyErr_Restore(error_type, error_value, error_traceback);
                                }
                        }
                }

                return ret;
        }
#endif
}

//--------------- setattr-------------------------------------------
static int pyrna_prop_collection_setattro(BPy_PropertyRNA *self, PyObject *pyname, PyObject *value)
{
        const char *name= _PyUnicode_AsString(pyname);
        PropertyRNA *prop;
        PointerRNA r_ptr;

#ifdef USE_PEDANTIC_WRITE
        if(rna_disallow_writes && rna_id_write_error(&self->ptr, pyname)) {
                return -1;
        }
#endif // USE_STRING_COERCE

        if(name == NULL) {
                PyErr_SetString(PyExc_AttributeError, "bpy_prop: __setattr__ must be a string");
                return -1;
        }
        else if(value == NULL) {
                PyErr_SetString(PyExc_AttributeError, "bpy_prop: del not supported");
                return -1;
        }
        else if(RNA_property_collection_type_get(&self->ptr, self->prop, &r_ptr)) {
                if ((prop= RNA_struct_find_property(&r_ptr, name))) {
                        /* pyrna_py_to_prop sets its own exceptions */
                        return pyrna_py_to_prop(&r_ptr, prop, NULL, value, "BPy_PropertyRNA - Attribute (setattr):");
                }
        }

        PyErr_Format(PyExc_AttributeError, "bpy_prop_collection: attribute \"%.200s\" not found", name);
        return -1;
}

/* odd case, we need to be able return a python method from a tp_getset */
static PyObject *pyrna_prop_collection_idprop_add(BPy_PropertyRNA *self)
{
        PointerRNA r_ptr;

        RNA_property_collection_add(&self->ptr, self->prop, &r_ptr);
        if(!r_ptr.data) {
                PyErr_SetString(PyExc_TypeError, "bpy_prop_collection.add(): not supported for this collection");
                return NULL;
        }
        else {
                return pyrna_struct_CreatePyObject(&r_ptr);
        }
}

static PyObject *pyrna_prop_collection_idprop_remove(BPy_PropertyRNA *self, PyObject *value)
{
        int key= PyLong_AsLong(value);

        if (key==-1 && PyErr_Occurred()) {
                PyErr_SetString(PyExc_TypeError, "bpy_prop_collection.remove(): expected one int argument");
                return NULL;
        }

        if(!RNA_property_collection_remove(&self->ptr, self->prop, key)) {
                PyErr_SetString(PyExc_TypeError, "bpy_prop_collection.remove() not supported for this collection");
                return NULL;
        }

        Py_RETURN_NONE;
}

static PyObject *pyrna_prop_collection_idprop_move(BPy_PropertyRNA *self, PyObject *args)
{
        int key=0, pos=0;

        if (!PyArg_ParseTuple(args, "ii", &key, &pos)) {
                PyErr_SetString(PyExc_TypeError, "bpy_prop_collection.move(): expected two ints as arguments");
                return NULL;
        }

        if(!RNA_property_collection_move(&self->ptr, self->prop, key, pos)) {
                PyErr_SetString(PyExc_TypeError, "bpy_prop_collection.move() not supported for this collection");
                return NULL;
        }

        Py_RETURN_NONE;
}

static PyObject *pyrna_struct_get_id_data(BPy_DummyPointerRNA *self)
{
        /* used for struct and pointer since both have a ptr */
        if(self->ptr.id.data) {
                PointerRNA id_ptr;
                RNA_id_pointer_create((ID *)self->ptr.id.data, &id_ptr);
                return pyrna_struct_CreatePyObject(&id_ptr);
        }

        Py_RETURN_NONE;
}

/*****************************************************************************/
/* Python attributes get/set structure:                                      */
/*****************************************************************************/

static PyGetSetDef pyrna_prop_getseters[]= {
        {(char *)"id_data", (getter)pyrna_struct_get_id_data, (setter)NULL, (char *)"The :class:`ID` object this datablock is from or None, (not available for all data types)", NULL},
        {NULL, NULL, NULL, NULL, NULL} /* Sentinel */
};


static PyGetSetDef pyrna_struct_getseters[]= {
        {(char *)"id_data", (getter)pyrna_struct_get_id_data, (setter)NULL, (char *)"The :class:`ID` object this datablock is from or None, (not available for all data types)", NULL},
        {NULL, NULL, NULL, NULL, NULL} /* Sentinel */
};

PyDoc_STRVAR(pyrna_prop_collection_keys_doc,
".. method:: keys()\n"
"\n"
"   Return the identifiers of collection members\n"
"   (matching pythons dict.keys() functionality).\n"
"\n"
"   :return: the identifiers for each member of this collection.\n"
"   :rtype: list of stings\n"
);
static PyObject *pyrna_prop_collection_keys(BPy_PropertyRNA *self)
{
        PyObject *ret= PyList_New(0);
        PyObject *item;
        char name[256], *nameptr;

        RNA_PROP_BEGIN(&self->ptr, itemptr, self->prop) {
                nameptr= RNA_struct_name_get_alloc(&itemptr, name, sizeof(name));

                if(nameptr) {
                        /* add to python list */
                        item= PyUnicode_FromString(nameptr);
                        PyList_Append(ret, item);
                        Py_DECREF(item);
                        /* done */

                        if(name != nameptr)
                                MEM_freeN(nameptr);
                }
        }
        RNA_PROP_END;

        return ret;
}

PyDoc_STRVAR(pyrna_prop_collection_items_doc,
".. method:: items()\n"
"\n"
"   Return the identifiers of collection members\n"
"   (matching pythons dict.items() functionality).\n"
"\n"
"   :return: (key, value) pairs for each member of this collection.\n"
"   :rtype: list of tuples\n"
);
static PyObject *pyrna_prop_collection_items(BPy_PropertyRNA *self)
{
        PyObject *ret= PyList_New(0);
        PyObject *item;
        char name[256], *nameptr;
        int i= 0;

        RNA_PROP_BEGIN(&self->ptr, itemptr, self->prop) {
                if(itemptr.data) {
                        /* add to python list */
                        item= PyTuple_New(2);
                        nameptr= RNA_struct_name_get_alloc(&itemptr, name, sizeof(name));
                        if(nameptr) {
                                PyTuple_SET_ITEM(item, 0, PyUnicode_FromString(nameptr));
                                if(name != nameptr)
                                        MEM_freeN(nameptr);
                        }
                        else {
                                PyTuple_SET_ITEM(item, 0, PyLong_FromSsize_t(i)); /* a bit strange but better then returning an empty list */
                        }
                        PyTuple_SET_ITEM(item, 1, pyrna_struct_CreatePyObject(&itemptr));

                        PyList_Append(ret, item);
                        Py_DECREF(item);

                        i++;
                }
        }
        RNA_PROP_END;

        return ret;
}

PyDoc_STRVAR(pyrna_prop_collection_values_doc,
".. method:: values()\n"
"\n"
"   Return the values of collection\n"
"   (matching pythons dict.values() functionality).\n"
"\n"
"   :return: the members of this collection.\n"
"   :rtype: list\n"
);
static PyObject *pyrna_prop_collection_values(BPy_PropertyRNA *self)
{
        /* re-use slice*/
        return pyrna_prop_collection_subscript_slice(self, 0, PY_SSIZE_T_MAX);
}

PyDoc_STRVAR(pyrna_struct_get_doc,
".. method:: get(key, default=None)\n"
"\n"
"   Returns the value of the custom property assigned to key or default\n"
"   when not found (matches pythons dictionary function of the same name).\n"
"\n"
"   :arg key: The key assosiated with the custom property.\n"
"   :type key: string\n"
"   :arg default: Optional argument for the value to return if\n"
"      *key* is not found.\n"
"   :type default: Undefined\n"
"\n"
"   .. note:: Only :class:`ID`, :class:`Bone` and :class:`PoseBone`\n"
"      classes support custom properties.\n"
);
static PyObject *pyrna_struct_get(BPy_StructRNA *self, PyObject *args)
{
        IDProperty *group, *idprop;

        const char *key;
        PyObject* def= Py_None;

        PYRNA_STRUCT_CHECK_OBJ(self)

        if (!PyArg_ParseTuple(args, "s|O:get", &key, &def))
                return NULL;

        /* mostly copied from BPy_IDGroup_Map_GetItem */
        if(RNA_struct_idprops_check(self->ptr.type)==0) {
                PyErr_SetString(PyExc_TypeError, "this type doesn't support IDProperties");
                return NULL;
        }

        group= RNA_struct_idprops(&self->ptr, 0);
        if(group) {
                idprop= IDP_GetPropertyFromGroup(group, key);

                if(idprop)
                        return BPy_IDGroup_WrapData(self->ptr.id.data, idprop);
        }

        return Py_INCREF(def), def;
}

PyDoc_STRVAR(pyrna_struct_as_pointer_doc,
".. method:: as_pointer()\n"
"\n"
"   Returns the memory address which holds a pointer to blenders internal data\n"
"\n"
"   :return: int (memory address).\n"
"   :rtype: int\n"
"\n"
"   .. note:: This is intended only for advanced script writers who need to\n"
"      pass blender data to their own C/Python modules.\n"
);
static PyObject *pyrna_struct_as_pointer(BPy_StructRNA *self)
{
        return PyLong_FromVoidPtr(self->ptr.data);
}

PyDoc_STRVAR(pyrna_prop_collection_get_doc,
".. method:: get(key, default=None)\n"
"\n"
"   Returns the value of the item assigned to key or default when not found\n"
"   (matches pythons dictionary function of the same name).\n"
"\n"
"   :arg key: The identifier for the collection member.\n"
"   :type key: string\n"
"   :arg default: Optional argument for the value to return if\n"
"      *key* is not found.\n"
"   :type default: Undefined\n"
);
static PyObject *pyrna_prop_collection_get(BPy_PropertyRNA *self, PyObject *args)
{
        PointerRNA newptr;

        const char *key;
        PyObject* def= Py_None;

        PYRNA_PROP_CHECK_OBJ(self)

        if (!PyArg_ParseTuple(args, "s|O:get", &key, &def))
                return NULL;

        if(RNA_property_collection_lookup_string(&self->ptr, self->prop, key, &newptr))
                return pyrna_struct_CreatePyObject(&newptr);

        return Py_INCREF(def), def;
}

static void foreach_attr_type(  BPy_PropertyRNA *self, const char *attr,
                                                                        /* values to assign */
                                                                        RawPropertyType *raw_type, int *attr_tot, int *attr_signed)
{
        PropertyRNA *prop;
        *raw_type= PROP_RAW_UNSET;
        *attr_tot= 0;
        *attr_signed= FALSE;

        /* note: this is fail with zero length lists, so dont let this get caled in that case */
        RNA_PROP_BEGIN(&self->ptr, itemptr, self->prop) {
                prop= RNA_struct_find_property(&itemptr, attr);
                *raw_type= RNA_property_raw_type(prop);
                *attr_tot= RNA_property_array_length(&itemptr, prop);
                *attr_signed= (RNA_property_subtype(prop)==PROP_UNSIGNED) ? FALSE:TRUE;
                break;
        }
        RNA_PROP_END;
}

/* pyrna_prop_collection_foreach_get/set both use this */
static int foreach_parse_args(
                BPy_PropertyRNA *self, PyObject *args,

                /*values to assign */
                const char **attr, PyObject **seq, int *tot, int *size, RawPropertyType *raw_type, int *attr_tot, int *attr_signed)
{
#if 0
        int array_tot;
        int target_tot;
#endif

        *size= *attr_tot= *attr_signed= FALSE;
        *raw_type= PROP_RAW_UNSET;

        if(!PyArg_ParseTuple(args, "sO", attr, seq) || (!PySequence_Check(*seq) && PyObject_CheckBuffer(*seq))) {
                PyErr_SetString(PyExc_TypeError, "foreach_get(attr, sequence) expects a string and a sequence");
                return -1;
        }

        *tot= PySequence_Size(*seq); // TODO - buffer may not be a sequence! array.array() is tho.

        if(*tot>0) {
                foreach_attr_type(self, *attr, raw_type, attr_tot, attr_signed);
                *size= RNA_raw_type_sizeof(*raw_type);

#if 0   // works fine but not strictly needed, we could allow RNA_property_collection_raw_* to do the checks
                if((*attr_tot) < 1)
                        *attr_tot= 1;

                if (RNA_property_type(self->prop) == PROP_COLLECTION)
                        array_tot= RNA_property_collection_length(&self->ptr, self->prop);
                else
                        array_tot= RNA_property_array_length(&self->ptr, self->prop);


                target_tot= array_tot * (*attr_tot);

                /* rna_access.c - rna_raw_access(...) uses this same method */
                if(target_tot != (*tot)) {
                        PyErr_Format(PyExc_TypeError,
                                     "foreach_get(attr, sequence) sequence length mismatch given %d, needed %d",
                                     *tot, target_tot);
                        return -1;
                }
#endif
        }

        /* check 'attr_tot' otherwise we dont know if any values were set
         * this isn't ideal because it means running on an empty list may fail silently when its not compatible. */
        if (*size == 0 && *attr_tot != 0) {
                PyErr_SetString(PyExc_AttributeError, "attribute does not support foreach method");
                return -1;
        }
        return 0;
}

static int foreach_compat_buffer(RawPropertyType raw_type, int attr_signed, const char *format)
{
        char f= format ? *format:'B'; /* B is assumed when not set */

        switch(raw_type) {
        case PROP_RAW_CHAR:
                if (attr_signed)        return (f=='b') ? 1:0;
                else                            return (f=='B') ? 1:0;
        case PROP_RAW_SHORT:
                if (attr_signed)        return (f=='h') ? 1:0;
                else                            return (f=='H') ? 1:0;
        case PROP_RAW_INT:
                if (attr_signed)        return (f=='i') ? 1:0;
                else                            return (f=='I') ? 1:0;
        case PROP_RAW_FLOAT:
                return (f=='f') ? 1:0;
        case PROP_RAW_DOUBLE:
                return (f=='d') ? 1:0;
        case PROP_RAW_UNSET:
                return 0;
        }

        return 0;
}

static PyObject *foreach_getset(BPy_PropertyRNA *self, PyObject *args, int set)
{
        PyObject *item= NULL;
        int i=0, ok=0, buffer_is_compat;
        void *array= NULL;

        /* get/set both take the same args currently */
        const char *attr;
        PyObject *seq;
        int tot, size, attr_tot, attr_signed;
        RawPropertyType raw_type;

        if(foreach_parse_args(self, args, &attr, &seq, &tot, &size, &raw_type, &attr_tot, &attr_signed) < 0)
                return NULL;

        if(tot==0)
                Py_RETURN_NONE;



        if(set) { /* get the array from python */
                buffer_is_compat= FALSE;
                if(PyObject_CheckBuffer(seq)) {
                        Py_buffer buf;
                        PyObject_GetBuffer(seq, &buf, PyBUF_SIMPLE | PyBUF_FORMAT);

                        /* check if the buffer matches */

                        buffer_is_compat= foreach_compat_buffer(raw_type, attr_signed, buf.format);

                        if(buffer_is_compat) {
                                ok= RNA_property_collection_raw_set(NULL, &self->ptr, self->prop, attr, buf.buf, raw_type, tot);
                        }

                        PyBuffer_Release(&buf);
                }

                /* could not use the buffer, fallback to sequence */
                if(!buffer_is_compat) {
                        array= PyMem_Malloc(size * tot);

                        for( ; i<tot; i++) {
                                item= PySequence_GetItem(seq, i);
                                switch(raw_type) {
                                case PROP_RAW_CHAR:
                                        ((char *)array)[i]= (char)PyLong_AsLong(item);
                                        break;
                                case PROP_RAW_SHORT:
                                        ((short *)array)[i]= (short)PyLong_AsLong(item);
                                        break;
                                case PROP_RAW_INT:
                                        ((int *)array)[i]= (int)PyLong_AsLong(item);
                                        break;
                                case PROP_RAW_FLOAT:
                                        ((float *)array)[i]= (float)PyFloat_AsDouble(item);
                                        break;
                                case PROP_RAW_DOUBLE:
                                        ((double *)array)[i]= (double)PyFloat_AsDouble(item);
                                        break;
                                case PROP_RAW_UNSET:
                                        /* should never happen */
                                        BLI_assert(!"Invalid array type - set");
                                        break;
                                }

                                Py_DECREF(item);
                        }

                        ok= RNA_property_collection_raw_set(NULL, &self->ptr, self->prop, attr, array, raw_type, tot);
                }
        }
        else {
                buffer_is_compat= FALSE;
                if(PyObject_CheckBuffer(seq)) {
                        Py_buffer buf;
                        PyObject_GetBuffer(seq, &buf, PyBUF_SIMPLE | PyBUF_FORMAT);

                        /* check if the buffer matches, TODO - signed/unsigned types */

                        buffer_is_compat= foreach_compat_buffer(raw_type, attr_signed, buf.format);

                        if(buffer_is_compat) {
                                ok= RNA_property_collection_raw_get(NULL, &self->ptr, self->prop, attr, buf.buf, raw_type, tot);
                        }

                        PyBuffer_Release(&buf);
                }

                /* could not use the buffer, fallback to sequence */
                if(!buffer_is_compat) {
                        array= PyMem_Malloc(size * tot);

                        ok= RNA_property_collection_raw_get(NULL, &self->ptr, self->prop, attr, array, raw_type, tot);

                        if(!ok) i= tot; /* skip the loop */

                        for( ; i<tot; i++) {

                                switch(raw_type) {
                                case PROP_RAW_CHAR:
                                        item= PyLong_FromSsize_t((Py_ssize_t) ((char *)array)[i]);
                                        break;
                                case PROP_RAW_SHORT:
                                        item= PyLong_FromSsize_t((Py_ssize_t) ((short *)array)[i]);
                                        break;
                                case PROP_RAW_INT:
                                        item= PyLong_FromSsize_t((Py_ssize_t) ((int *)array)[i]);
                                        break;
                                case PROP_RAW_FLOAT:
                                        item= PyFloat_FromDouble((double) ((float *)array)[i]);
                                        break;
                                case PROP_RAW_DOUBLE:
                                        item= PyFloat_FromDouble((double) ((double *)array)[i]);
                                        break;
                                default: /* PROP_RAW_UNSET */
                                        /* should never happen */
                                        BLI_assert(!"Invalid array type - get");
                                        item= Py_None;
                                        Py_INCREF(item);
                                        break;
                                }

                                PySequence_SetItem(seq, i, item);
                                Py_DECREF(item);
                        }
                }
        }

        if(array)
                PyMem_Free(array);

        if(PyErr_Occurred()) {
                /* Maybe we could make our own error */
                PyErr_Print();
                PyErr_SetString(PyExc_TypeError, "couldn't access the py sequence");
                return NULL;
        }
        if (!ok) {
                PyErr_SetString(PyExc_RuntimeError, "internal error setting the array");
                return NULL;
        }

        Py_RETURN_NONE;
}

PyDoc_STRVAR(pyrna_prop_collection_foreach_get_doc,
".. method:: foreach_get(attr, seq)\n"
"\n"
"   This is a function to give fast access to attributes within a collection.\n"
"\n"
"   .. code-block:: python\n"
"\n"
"      collection.foreach_get(someseq, attr)\n"
"\n"
"      # Python equivalent\n"
"      for i in range(len(seq)): someseq[i]= getattr(collection, attr)\n"
"\n"
);
static PyObject *pyrna_prop_collection_foreach_get(BPy_PropertyRNA *self, PyObject *args)
{
        PYRNA_PROP_CHECK_OBJ(self)

        return foreach_getset(self, args, 0);
}

PyDoc_STRVAR(pyrna_prop_collection_foreach_set_doc,
".. method:: foreach_set(attr, seq)\n"
"\n"
"   This is a function to give fast access to attributes within a collection.\n"
"\n"
"   .. code-block:: python\n"
"\n"
"      collection.foreach_set(seq, attr)\n"
"\n"
"      # Python equivalent\n"
"      for i in range(len(seq)): setattr(collection[i], attr, seq[i])\n"
"\n"
);
static PyObject *pyrna_prop_collection_foreach_set(BPy_PropertyRNA *self, PyObject *args)
{
        PYRNA_PROP_CHECK_OBJ(self)

        return foreach_getset(self, args, 1);
}

/* A bit of a kludge, make a list out of a collection or array,
 * then return the lists iter function, not especially fast but convenient for now */
static PyObject *pyrna_prop_array_iter(BPy_PropertyArrayRNA *self)
{
        /* Try get values from a collection */
        PyObject *ret;
        PyObject *iter= NULL;
        int len;

        PYRNA_PROP_CHECK_OBJ((BPy_PropertyRNA *)self)

        len= pyrna_prop_array_length(self);
        ret= pyrna_prop_array_subscript_slice(self, &self->ptr, self->prop, 0, len, len);

        /* we know this is a list so no need to PyIter_Check
         * otherwise it could be NULL (unlikely) if conversion failed */
        if(ret) {
                iter= PyObject_GetIter(ret);
                Py_DECREF(ret);
        }

        return iter;
}

static PyObject *pyrna_prop_collection_iter(BPy_PropertyRNA *self);

#ifndef USE_PYRNA_ITER
static PyObject *pyrna_prop_collection_iter(BPy_PropertyRNA *self)
{
        /* Try get values from a collection */
        PyObject *ret;
        PyObject *iter= NULL;
        ret= pyrna_prop_collection_values(self);

        /* we know this is a list so no need to PyIter_Check
         * otherwise it could be NULL (unlikely) if conversion failed */
        if(ret) {
                iter= PyObject_GetIter(ret);
                Py_DECREF(ret);
        }

        return iter;
}
#endif /* # !USE_PYRNA_ITER */

static struct PyMethodDef pyrna_struct_methods[]= {

        /* only for PointerRNA's with ID'props */
        {"keys", (PyCFunction)pyrna_struct_keys, METH_NOARGS, pyrna_struct_keys_doc},
        {"values", (PyCFunction)pyrna_struct_values, METH_NOARGS, pyrna_struct_values_doc},
        {"items", (PyCFunction)pyrna_struct_items, METH_NOARGS, pyrna_struct_items_doc},

        {"get", (PyCFunction)pyrna_struct_get, METH_VARARGS, pyrna_struct_get_doc},

        {"as_pointer", (PyCFunction)pyrna_struct_as_pointer, METH_NOARGS, pyrna_struct_as_pointer_doc},

        /* bpy_rna_anim.c */
        {"keyframe_insert", (PyCFunction)pyrna_struct_keyframe_insert, METH_VARARGS|METH_KEYWORDS, pyrna_struct_keyframe_insert_doc},
        {"keyframe_delete", (PyCFunction)pyrna_struct_keyframe_delete, METH_VARARGS|METH_KEYWORDS, pyrna_struct_keyframe_delete_doc},
        {"driver_add", (PyCFunction)pyrna_struct_driver_add, METH_VARARGS, pyrna_struct_driver_add_doc},
        {"driver_remove", (PyCFunction)pyrna_struct_driver_remove, METH_VARARGS, pyrna_struct_driver_remove_doc},

        {"is_property_set", (PyCFunction)pyrna_struct_is_property_set, METH_VARARGS, pyrna_struct_is_property_set_doc},
        {"is_property_hidden", (PyCFunction)pyrna_struct_is_property_hidden, METH_VARARGS, pyrna_struct_is_property_hidden_doc},
        {"path_resolve", (PyCFunction)pyrna_struct_path_resolve, METH_VARARGS, pyrna_struct_path_resolve_doc},
        {"path_from_id", (PyCFunction)pyrna_struct_path_from_id, METH_VARARGS, pyrna_struct_path_from_id_doc},
        {"type_recast", (PyCFunction)pyrna_struct_type_recast, METH_NOARGS, pyrna_struct_type_recast_doc},
        {"__dir__", (PyCFunction)pyrna_struct_dir, METH_NOARGS, NULL},

        /* experemental */
        {"callback_add", (PyCFunction)pyrna_callback_add, METH_VARARGS, NULL},
        {"callback_remove", (PyCFunction)pyrna_callback_remove, METH_VARARGS, NULL},
        {NULL, NULL, 0, NULL}
};

static struct PyMethodDef pyrna_prop_methods[]= {
        {"path_from_id", (PyCFunction)pyrna_prop_path_from_id, METH_NOARGS, pyrna_prop_path_from_id_doc},
        {"__dir__", (PyCFunction)pyrna_prop_dir, METH_NOARGS, NULL},
        {NULL, NULL, 0, NULL}
};

static struct PyMethodDef pyrna_prop_array_methods[]= {
        {NULL, NULL, 0, NULL}
};

static struct PyMethodDef pyrna_prop_collection_methods[]= {
        {"foreach_get", (PyCFunction)pyrna_prop_collection_foreach_get, METH_VARARGS, pyrna_prop_collection_foreach_get_doc},
        {"foreach_set", (PyCFunction)pyrna_prop_collection_foreach_set, METH_VARARGS, pyrna_prop_collection_foreach_set_doc},

        {"keys", (PyCFunction)pyrna_prop_collection_keys, METH_NOARGS, pyrna_prop_collection_keys_doc},
        {"items", (PyCFunction)pyrna_prop_collection_items, METH_NOARGS, pyrna_prop_collection_items_doc},
        {"values", (PyCFunction)pyrna_prop_collection_values, METH_NOARGS, pyrna_prop_collection_values_doc},

        {"get", (PyCFunction)pyrna_prop_collection_get, METH_VARARGS, pyrna_prop_collection_get_doc},
        {NULL, NULL, 0, NULL}
};

static struct PyMethodDef pyrna_prop_collection_idprop_methods[]= {
        {"add", (PyCFunction)pyrna_prop_collection_idprop_add, METH_NOARGS, NULL},
        {"remove", (PyCFunction)pyrna_prop_collection_idprop_remove, METH_O, NULL},
        {"move", (PyCFunction)pyrna_prop_collection_idprop_move, METH_VARARGS, NULL},
        {NULL, NULL, 0, NULL}
};

/* only needed for subtyping, so a new class gets a valid BPy_StructRNA
 * todo - also accept useful args */
static PyObject *pyrna_struct_new(PyTypeObject *type, PyObject *args, PyObject *UNUSED(kwds))
{
        if(PyTuple_GET_SIZE(args) == 1) {
                BPy_StructRNA *base= (BPy_StructRNA *)PyTuple_GET_ITEM(args, 0);
                if (Py_TYPE(base) == type) {
                        Py_INCREF(base);
                        return (PyObject *)base;
                }
                else if (PyType_IsSubtype(Py_TYPE(base), &pyrna_struct_Type)) {
                        /* this almost never runs, only when using user defined subclasses of built-in object.
                         * this isn't common since its NOT related to registerable subclasses. eg:

                                >>> class MyObSubclass(bpy.types.Object):
                                ...     def test_func(self):
                                ...         print(100)
                                ...
                                >>> myob= MyObSubclass(bpy.context.object)
                                >>> myob.test_func()
                                100
                         *
                         * Keep this since it could be useful.
                         */
                        BPy_StructRNA *ret;
                        if((ret= (BPy_StructRNA *)type->tp_alloc(type, 0))) {
                                ret->ptr= base->ptr;
                        }
                        /* pass on exception & NULL if tp_alloc fails */
                        return (PyObject *)ret;
                }

                /* error, invalid type given */
                PyErr_Format(PyExc_TypeError, "bpy_struct.__new__(type): type '%.200s' is not a subtype of bpy_struct", type->tp_name);
                return NULL;
        }
        else {
                PyErr_Format(PyExc_TypeError, "bpy_struct.__new__(type): expected a single argument");
                return NULL;
        }
}

/* only needed for subtyping, so a new class gets a valid BPy_StructRNA
 * todo - also accept useful args */
static PyObject *pyrna_prop_new(PyTypeObject *type, PyObject *args, PyObject *UNUSED(kwds)) {

        BPy_PropertyRNA *base;

        if (!PyArg_ParseTuple(args, "O!:bpy_prop.__new__", &pyrna_prop_Type, &base))
                return NULL;

        if (type == Py_TYPE(base)) {
                Py_INCREF(base);
                return (PyObject *)base;
        }
        else if (PyType_IsSubtype(type, &pyrna_prop_Type)) {
                BPy_PropertyRNA *ret= (BPy_PropertyRNA *) type->tp_alloc(type, 0);
                ret->ptr= base->ptr;
                ret->prop= base->prop;
                return (PyObject *)ret;
        }
        else {
                PyErr_Format(PyExc_TypeError, "bpy_prop.__new__(type): type '%.200s' is not a subtype of bpy_prop", type->tp_name);
                return NULL;
        }
}

static PyObject *pyrna_param_to_py(PointerRNA *ptr, PropertyRNA *prop, void *data)
{
        PyObject *ret;
        int type= RNA_property_type(prop);
        int flag= RNA_property_flag(prop);

        if(RNA_property_array_check(ptr, prop)) {
                int a, len;

                if (flag & PROP_DYNAMIC) {
                        ParameterDynAlloc *data_alloc= data;
                        len= data_alloc->array_tot;
                        data= data_alloc->array;
                }
                else
                        len= RNA_property_array_length(ptr, prop);

                /* resolve the array from a new pytype */

                /* kazanbas: TODO make multidim sequences here */

                switch (type) {
                case PROP_BOOLEAN:
                        ret= PyTuple_New(len);
                        for(a=0; a<len; a++)
                                PyTuple_SET_ITEM(ret, a, PyBool_FromLong(((int*)data)[a]));
                        break;
                case PROP_INT:
                        ret= PyTuple_New(len);
                        for(a=0; a<len; a++)
                                PyTuple_SET_ITEM(ret, a, PyLong_FromSsize_t((Py_ssize_t)((int*)data)[a]));
                        break;
                case PROP_FLOAT:
                        switch(RNA_property_subtype(prop)) {
#ifdef USE_MATHUTILS
                                case PROP_ALL_VECTOR_SUBTYPES:
                                        ret= newVectorObject(data, len, Py_NEW, NULL);
                                        break;
                                case PROP_MATRIX:
                                        if(len==16) {
                                                ret= newMatrixObject(data, 4, 4, Py_NEW, NULL);
                                                break;
                                        }
                                        else if (len==9) {
                                                ret= newMatrixObject(data, 3, 3, Py_NEW, NULL);
                                                break;
                                        }
                                        /* pass through */
#endif
                                default:
                                        ret= PyTuple_New(len);
                                        for(a=0; a<len; a++)
                                                PyTuple_SET_ITEM(ret, a, PyFloat_FromDouble(((float*)data)[a]));

                        }
                        break;
                default:
                        PyErr_Format(PyExc_TypeError, "RNA Error: unknown array type \"%d\" (pyrna_param_to_py)", type);
                        ret= NULL;
                        break;
                }
        }
        else {
                /* see if we can coorce into a python type - PropertyType */
                switch (type) {
                case PROP_BOOLEAN:
                        ret= PyBool_FromLong(*(int*)data);
                        break;
                case PROP_INT:
                        ret= PyLong_FromSsize_t((Py_ssize_t)*(int*)data);
                        break;
                case PROP_FLOAT:
                        ret= PyFloat_FromDouble(*(float*)data);
                        break;
                case PROP_STRING:
                {
                        char *data_ch;
                        PyObject *value_coerce= NULL;
                        int subtype= RNA_property_subtype(prop);

                        if (flag & PROP_THICK_WRAP)
                                data_ch= (char *)data;
                        else
                                data_ch= *(char **)data;

#ifdef USE_STRING_COERCE
                        if(ELEM3(subtype, PROP_FILEPATH, PROP_DIRPATH, PROP_FILENAME)) {
                                ret= PyC_UnicodeFromByte(data_ch);
                        }
                        else {
                                ret= PyUnicode_FromString(data_ch);
                        }
#else
                        ret= PyUnicode_FromString(data_ch);
#endif

#ifdef USE_STRING_COERCE
                        Py_XDECREF(value_coerce);
#endif

                        break;
                }
                case PROP_ENUM:
                {
                        ret= pyrna_enum_to_py(ptr, prop, *(int*)data);
                        break;
                }
                case PROP_POINTER:
                {
                        PointerRNA newptr;
                        StructRNA *ptype= RNA_property_pointer_type(ptr, prop);

                        if(flag & PROP_RNAPTR) {
                                /* in this case we get the full ptr */
                                newptr= *(PointerRNA*)data;
                        }
                        else {
                                if(RNA_struct_is_ID(ptype)) {
                                        RNA_id_pointer_create(*(void**)data, &newptr);
                                }
                                else {
                                        /* note: this is taken from the function's ID pointer
                                         * and will break if a function returns a pointer from
                                         * another ID block, watch this! - it should at least be
                                         * easy to debug since they are all ID's */
                                        RNA_pointer_create(ptr->id.data, ptype, *(void**)data, &newptr);
                                }
                        }

                        if (newptr.data) {
                                ret= pyrna_struct_CreatePyObject(&newptr);
                        }
                        else {
                                ret= Py_None;
                                Py_INCREF(ret);
                        }
                        break;
                }
                case PROP_COLLECTION:
                {
                        ListBase *lb= (ListBase*)data;
                        CollectionPointerLink *link;
                        PyObject *linkptr;

                        ret= PyList_New(0);

                        for(link=lb->first; link; link=link->next) {
                                linkptr= pyrna_struct_CreatePyObject(&link->ptr);
                                PyList_Append(ret, linkptr);
                                Py_DECREF(linkptr);
                        }

                        break;
                }
                default:
                        PyErr_Format(PyExc_TypeError, "RNA Error: unknown type \"%d\" (pyrna_param_to_py)", type);
                        ret= NULL;
                        break;
                }
        }

        return ret;
}

static PyObject *pyrna_func_call(BPy_FunctionRNA *self, PyObject *args, PyObject *kw)
{
        /* Note, both BPy_StructRNA and BPy_PropertyRNA can be used here */
        PointerRNA *self_ptr= &self->ptr;
        FunctionRNA *self_func= self->func;

        PointerRNA funcptr;
        ParameterList parms;
        ParameterIterator iter;
        PropertyRNA *parm;
        PyObject *ret, *item;
        int i, pyargs_len, pykw_len, parms_len, ret_len, flag, err= 0, kw_tot= 0, kw_arg;
        const char *parm_id;

        PropertyRNA *pret_single= NULL;
        void *retdata_single= NULL;

        /* enable this so all strings are copied and freed after calling.
         * this exposes bugs where the pointer to the string is held and re-used */
// #define DEBUG_STRING_FREE

#ifdef DEBUG_STRING_FREE
        PyObject *string_free_ls= PyList_New(0);
#endif

        /* Should never happen but it does in rare cases */
        BLI_assert(self_ptr != NULL);

        if(self_ptr==NULL) {
                PyErr_SetString(PyExc_RuntimeError, "rna functions internal rna pointer is NULL, this is a bug. aborting");
                return NULL;
        }

        if(self_func==NULL) {
                PyErr_Format(PyExc_RuntimeError,
                             "%.200s.<unknown>(): rna function internal function is NULL, this is a bug. aborting",
                             RNA_struct_identifier(self_ptr->type));
                return NULL;
        }

        /* for testing */
        /*
        {
                const char *fn;
                int lineno;
                PyC_FileAndNum(&fn, &lineno);
                printf("pyrna_func_call > %.200s.%.200s : %.200s:%d\n", RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func), fn, lineno);
        }
        */

        /* include the ID pointer for pyrna_param_to_py() so we can include the
         * ID pointer on return values, this only works when returned values have
         * the same ID as the functions. */
        RNA_pointer_create(self_ptr->id.data, &RNA_Function, self_func, &funcptr);

        pyargs_len= PyTuple_GET_SIZE(args);
        pykw_len= kw ? PyDict_Size(kw) : 0;

        RNA_parameter_list_create(&parms, self_ptr, self_func);
        RNA_parameter_list_begin(&parms, &iter);
        parms_len= RNA_parameter_list_arg_count(&parms);
        ret_len= 0;

        if(pyargs_len + pykw_len > parms_len) {
                RNA_parameter_list_end(&iter);
                PyErr_Format(PyExc_TypeError,
                             "%.200s.%.200s(): takes at most %d arguments, got %d",
                             RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func),
                             parms_len, pyargs_len + pykw_len);
                err= -1;
        }

        /* parse function parameters */
        for (i= 0; iter.valid && err==0; RNA_parameter_list_next(&iter)) {
                parm= iter.parm;
                flag= RNA_property_flag(parm);

                /* only useful for single argument returns, we'll need another list loop for multiple */
                if (flag & PROP_OUTPUT) {
                        ret_len++;
                        if (pret_single==NULL) {
                                pret_single= parm;
                                retdata_single= iter.data;
                        }

                        continue;
                }

                parm_id= RNA_property_identifier(parm);
                item= NULL;

                if (i < pyargs_len) {
                        item= PyTuple_GET_ITEM(args, i);
                        i++;

                        kw_arg= FALSE;
                }
                else if (kw != NULL) {
                        item= PyDict_GetItemString(kw, parm_id); /* borrow ref */
                        if(item)
                                kw_tot++; /* make sure invalid keywords are not given */

                        kw_arg= TRUE;
                }

                if (item==NULL) {
                        if(flag & PROP_REQUIRED) {
                                PyErr_Format(PyExc_TypeError,
                                             "%.200s.%.200s(): required parameter \"%.200s\" not specified",
                                             RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func), parm_id);
                                err= -1;
                                break;
                        }
                        else { /* PyDict_GetItemString wont raise an error */
                                continue;
                        }
                }

#ifdef DEBUG_STRING_FREE
                if(item) {
                        if(PyUnicode_Check(item)) {
                                item= PyUnicode_FromString(_PyUnicode_AsString(item));
                                PyList_Append(string_free_ls, item);
                                Py_DECREF(item);
                        }
                }
#endif
                err= pyrna_py_to_prop(&funcptr, parm, iter.data, item, "");

                if(err!=0) {
                        /* the error generated isn't that useful, so generate it again with a useful prefix
                         * could also write a function to prepend to error messages */
                        char error_prefix[512];
                        PyErr_Clear(); /* re-raise */

                        if(kw_arg==TRUE)
                                snprintf(error_prefix, sizeof(error_prefix), "%s.%s(): error with keyword argument \"%s\" - ", RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func), parm_id);
                        else
                                snprintf(error_prefix, sizeof(error_prefix), "%s.%s(): error with argument %d, \"%s\" - ", RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func), i, parm_id);

                        pyrna_py_to_prop(&funcptr, parm, iter.data, item, error_prefix);

                        break;
                }
        }

        RNA_parameter_list_end(&iter);

        /* Check if we gave args that don't exist in the function
         * printing the error is slow but it should only happen when developing.
         * the if below is quick, checking if it passed less keyword args then we gave.
         * (Dont overwrite the error if we have one, otherwise can skip important messages and confuse with args)
         */
        if(err == 0 && kw && (pykw_len > kw_tot)) {
                PyObject *key, *value;
                Py_ssize_t pos= 0;

                DynStr *bad_args= BLI_dynstr_new();
                DynStr *good_args= BLI_dynstr_new();

                const char *arg_name, *bad_args_str, *good_args_str;
                int found= FALSE, first= TRUE;

                while (PyDict_Next(kw, &pos, &key, &value)) {

                        arg_name= _PyUnicode_AsString(key);
                        found= FALSE;

                        if(arg_name==NULL) { /* unlikely the argname is not a string but ignore if it is*/
                                PyErr_Clear();
                        }
                        else {
                                /* Search for arg_name */
                                RNA_parameter_list_begin(&parms, &iter);
                                for(; iter.valid; RNA_parameter_list_next(&iter)) {
                                        parm= iter.parm;
                                        if (strcmp(arg_name, RNA_property_identifier(parm))==0) {
                                                found= TRUE;
                                                break;
                                        }
                                }

                                RNA_parameter_list_end(&iter);

                                if(found==FALSE) {
                                        BLI_dynstr_appendf(bad_args, first ? "%s" : ", %s", arg_name);
                                        first= FALSE;
                                }
                        }
                }

                /* list good args */
                first= TRUE;

                RNA_parameter_list_begin(&parms, &iter);
                for(; iter.valid; RNA_parameter_list_next(&iter)) {
                        parm= iter.parm;
                        if(RNA_property_flag(parm) & PROP_OUTPUT)
                                continue;

                        BLI_dynstr_appendf(good_args, first ? "%s" : ", %s", RNA_property_identifier(parm));
                        first= FALSE;
                }
                RNA_parameter_list_end(&iter);


                bad_args_str= BLI_dynstr_get_cstring(bad_args);
                good_args_str= BLI_dynstr_get_cstring(good_args);

                PyErr_Format(PyExc_TypeError,
                             "%.200s.%.200s(): was called with invalid keyword arguments(s) (%s), expected (%s)",
                             RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func),
                             bad_args_str, good_args_str);

                BLI_dynstr_free(bad_args);
                BLI_dynstr_free(good_args);
                MEM_freeN((void *)bad_args_str);
                MEM_freeN((void *)good_args_str);

                err= -1;
        }

        ret= NULL;
        if (err==0) {
                /* call function */
                ReportList reports;
                bContext *C= BPy_GetContext();

                BKE_reports_init(&reports, RPT_STORE);
                RNA_function_call(C, &reports, self_ptr, self_func, &parms);

                err= (BPy_reports_to_error(&reports, PyExc_RuntimeError, TRUE));

                /* return value */
                if(err != -1) {
                        if (ret_len > 0) {
                                if (ret_len > 1) {
                                        ret= PyTuple_New(ret_len);
                                        i= 0; /* arg index */

                                        RNA_parameter_list_begin(&parms, &iter);

                                        for(; iter.valid; RNA_parameter_list_next(&iter)) {
                                                parm= iter.parm;
                                                flag= RNA_property_flag(parm);

                                                if (flag & PROP_OUTPUT)
                                                        PyTuple_SET_ITEM(ret, i++, pyrna_param_to_py(&funcptr, parm, iter.data));
                                        }

                                        RNA_parameter_list_end(&iter);
                                }
                                else
                                        ret= pyrna_param_to_py(&funcptr, pret_single, retdata_single);

                                /* possible there is an error in conversion */
                                if(ret==NULL)
                                        err= -1;
                        }
                }
        }


#ifdef DEBUG_STRING_FREE
        // if(PyList_Size(string_free_ls)) printf("%.200s.%.200s():  has %d strings\n", RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func), (int)PyList_Size(string_free_ls));
        Py_DECREF(string_free_ls);
#undef DEBUG_STRING_FREE
#endif

        /* cleanup */
        RNA_parameter_list_end(&iter);
        RNA_parameter_list_free(&parms);

        if (ret)
                return ret;

        if (err==-1)
                return NULL;

        Py_RETURN_NONE;
}


/* subclasses of pyrna_struct_Type which support idprop definitions use this as a metaclass */
/* note: tp_base member is set to &PyType_Type on init */
PyTypeObject pyrna_struct_meta_idprop_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_struct_meta_idprop",       /* tp_name */
        sizeof(PyHeapTypeObject),               /* tp_basicsize */ // XXX, would be PyTypeObject, but subtypes of Type must be PyHeapTypeObject's
        0,                                                      /* tp_itemsize */
        /* methods */
        NULL,                                           /* tp_dealloc */
        NULL,                       /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                                           /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* deprecated in python 3.0! */
        NULL,                                           /* tp_repr */

        /* Method suites for standard classes */
        NULL,                       /* PyNumberMethods *tp_as_number; */
        NULL,                                           /* PySequenceMethods *tp_as_sequence; */
        NULL,                                           /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */
        NULL,                                           /* hashfunc tp_hash; */
        NULL,                                           /* ternaryfunc tp_call; */
        NULL,                                           /* reprfunc tp_str; */
        NULL /*(getattrofunc) pyrna_struct_meta_idprop_getattro*/,      /* getattrofunc tp_getattro; */
        (setattrofunc) pyrna_struct_meta_idprop_setattro,       /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
        NULL,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        NULL,   /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
        0,                          /* long tp_weaklistoffset; */

  /*** Added in release 2.2 ***/
        /*   Iterators */
        NULL,                       /* getiterfunc tp_iter; */
        NULL,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        NULL,                                           /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        NULL,                                           /* struct PyGetSetDef *tp_getset; */
        NULL,                       /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        NULL,                                           /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                       /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};


/*-----------------------BPy_StructRNA method def------------------------------*/
PyTypeObject pyrna_struct_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_struct",                   /* tp_name */
        sizeof(BPy_StructRNA),  /* tp_basicsize */
        0,                      /* tp_itemsize */
        /* methods */
        (destructor) pyrna_struct_dealloc,/* tp_dealloc */
        NULL,                       /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                                           /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* DEPRECATED in python 3.0! */
        (reprfunc) pyrna_struct_repr,   /* tp_repr */

        /* Method suites for standard classes */

        NULL,                       /* PyNumberMethods *tp_as_number; */
        &pyrna_struct_as_sequence,      /* PySequenceMethods *tp_as_sequence; */
        &pyrna_struct_as_mapping,       /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */

        (hashfunc) pyrna_struct_hash,   /* hashfunc tp_hash; */
        NULL,                                           /* ternaryfunc tp_call; */
        (reprfunc) pyrna_struct_str, /* reprfunc tp_str; */
        (getattrofunc) pyrna_struct_getattro,   /* getattrofunc tp_getattro; */
        (setattrofunc) pyrna_struct_setattro,   /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
#ifdef USE_PYRNA_STRUCT_REFERENCE
        (traverseproc) pyrna_struct_traverse,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        (inquiry)pyrna_struct_clear,                       /* inquiry tp_clear; */
#else
        NULL,                       /* traverseproc tp_traverse; */

/* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */
#endif /* !USE_PYRNA_STRUCT_REFERENCE */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        (richcmpfunc)pyrna_struct_richcmp,      /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
#ifdef USE_WEAKREFS
        offsetof(BPy_StructRNA, in_weakreflist),        /* long tp_weaklistoffset; */
#else
        0,
#endif
  /*** Added in release 2.2 ***/
        /*   Iterators */
        NULL,                       /* getiterfunc tp_iter; */
        NULL,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        pyrna_struct_methods,                   /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        pyrna_struct_getseters,         /* struct PyGetSetDef *tp_getset; */
        NULL,                       /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        pyrna_struct_new,                       /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                       /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};

/*-----------------------BPy_PropertyRNA method def------------------------------*/
PyTypeObject pyrna_prop_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_prop",             /* tp_name */
        sizeof(BPy_PropertyRNA),                        /* tp_basicsize */
        0,                      /* tp_itemsize */
        /* methods */
        (destructor) pyrna_prop_dealloc, /* tp_dealloc */
        NULL,                                           /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                       /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* DEPRECATED in python 3.0! */
        (reprfunc) pyrna_prop_repr,     /* tp_repr */

        /* Method suites for standard classes */

        NULL,                       /* PyNumberMethods *tp_as_number; */
        NULL,                                           /* PySequenceMethods *tp_as_sequence; */
        NULL,                                           /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */

        (hashfunc) pyrna_prop_hash,     /* hashfunc tp_hash; */
        NULL,                       /* ternaryfunc tp_call; */
        (reprfunc) pyrna_prop_str,  /* reprfunc tp_str; */

        /* will only use these if this is a subtype of a py class */
        NULL,                                           /* getattrofunc tp_getattro; */
        NULL,                                           /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
        NULL,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        (richcmpfunc)pyrna_prop_richcmp,        /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
#ifdef USE_WEAKREFS
        offsetof(BPy_PropertyRNA, in_weakreflist),      /* long tp_weaklistoffset; */
#else
        0,
#endif

  /*** Added in release 2.2 ***/
        /*   Iterators */
        NULL,                                           /* getiterfunc tp_iter; */
        NULL,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        pyrna_prop_methods,                     /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        pyrna_prop_getseters,           /* struct PyGetSetDef *tp_getset; */
        NULL,                       /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        pyrna_prop_new,                         /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                       /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};

PyTypeObject pyrna_prop_array_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_prop_array",               /* tp_name */
        sizeof(BPy_PropertyArrayRNA),                   /* tp_basicsize */
        0,                                                      /* tp_itemsize */
        /* methods */
        (destructor)pyrna_prop_array_dealloc, /* tp_dealloc */
        NULL,                       /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                       /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* DEPRECATED in python 3.0! */
        NULL,/* subclassed */           /* tp_repr */

        /* Method suites for standard classes */

        &pyrna_prop_array_as_number,    /* PyNumberMethods *tp_as_number; */
        &pyrna_prop_array_as_sequence,  /* PySequenceMethods *tp_as_sequence; */
        &pyrna_prop_array_as_mapping,   /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */

        NULL,                                           /* hashfunc tp_hash; */
        NULL,                       /* ternaryfunc tp_call; */
        NULL,                       /* reprfunc tp_str; */

        /* will only use these if this is a subtype of a py class */
        (getattrofunc) pyrna_prop_array_getattro,       /* getattrofunc tp_getattro; */
        NULL,                                           /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
        NULL,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        NULL, /* subclassed */          /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
#ifdef USE_WEAKREFS
        offsetof(BPy_PropertyArrayRNA, in_weakreflist), /* long tp_weaklistoffset; */
#else
        0,
#endif
  /*** Added in release 2.2 ***/
        /*   Iterators */
        (getiterfunc)pyrna_prop_array_iter,     /* getiterfunc tp_iter; */
        NULL,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        pyrna_prop_array_methods,                       /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        NULL /*pyrna_prop_getseters*/,          /* struct PyGetSetDef *tp_getset; */
        &pyrna_prop_Type,                       /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        NULL,                                           /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                   /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};

PyTypeObject pyrna_prop_collection_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_prop_collection",          /* tp_name */
        sizeof(BPy_PropertyRNA),                        /* tp_basicsize */
        0,                      /* tp_itemsize */
        /* methods */
        (destructor)pyrna_prop_dealloc, /* tp_dealloc */
        NULL,                       /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                       /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* DEPRECATED in python 3.0! */
        NULL, /* subclassed */          /* tp_repr */

        /* Method suites for standard classes */

        &pyrna_prop_collection_as_number,   /* PyNumberMethods *tp_as_number; */
        &pyrna_prop_collection_as_sequence,     /* PySequenceMethods *tp_as_sequence; */
        &pyrna_prop_collection_as_mapping,      /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */

        NULL,                                           /* hashfunc tp_hash; */
        NULL,                       /* ternaryfunc tp_call; */
        NULL,                       /* reprfunc tp_str; */

        /* will only use these if this is a subtype of a py class */
        (getattrofunc) pyrna_prop_collection_getattro,  /* getattrofunc tp_getattro; */
        (setattrofunc) pyrna_prop_collection_setattro,  /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
        NULL,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        NULL, /* subclassed */          /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
#ifdef USE_WEAKREFS
        offsetof(BPy_PropertyRNA, in_weakreflist),      /* long tp_weaklistoffset; */
#else
        0,
#endif

  /*** Added in release 2.2 ***/
        /*   Iterators */
        (getiterfunc)pyrna_prop_collection_iter,        /* getiterfunc tp_iter; */
        NULL,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        pyrna_prop_collection_methods,                  /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        NULL /*pyrna_prop_getseters*/,          /* struct PyGetSetDef *tp_getset; */
        &pyrna_prop_Type,                       /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        NULL,                                           /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                                           /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};

/* only for add/remove/move methods */
static PyTypeObject pyrna_prop_collection_idprop_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_prop_collection_idprop",           /* tp_name */
        sizeof(BPy_PropertyRNA),                        /* tp_basicsize */
        0,                                                      /* tp_itemsize */
        /* methods */
        (destructor)pyrna_prop_dealloc, /* tp_dealloc */
        NULL,                       /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                       /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* DEPRECATED in python 3.0! */
        NULL, /* subclassed */          /* tp_repr */

        /* Method suites for standard classes */

        NULL,   /* PyNumberMethods *tp_as_number; */
        NULL,   /* PySequenceMethods *tp_as_sequence; */
        NULL,   /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */

        NULL,                                           /* hashfunc tp_hash; */
        NULL,                       /* ternaryfunc tp_call; */
        NULL,                       /* reprfunc tp_str; */

        /* will only use these if this is a subtype of a py class */
        NULL,                                           /* getattrofunc tp_getattro; */
        NULL,                                           /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
        NULL,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        NULL, /* subclassed */          /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
#ifdef USE_WEAKREFS
        offsetof(BPy_PropertyRNA, in_weakreflist),      /* long tp_weaklistoffset; */
#else
        0,
#endif

  /*** Added in release 2.2 ***/
        /*   Iterators */
        NULL,                                           /* getiterfunc tp_iter; */
        NULL,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        pyrna_prop_collection_idprop_methods, /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        NULL /*pyrna_prop_getseters*/,          /* struct PyGetSetDef *tp_getset; */
        &pyrna_prop_collection_Type,            /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        NULL,                                           /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                                           /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};

/*-----------------------BPy_PropertyRNA method def------------------------------*/
PyTypeObject pyrna_func_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_func",             /* tp_name */
        sizeof(BPy_FunctionRNA),                        /* tp_basicsize */
        0,                      /* tp_itemsize */
        /* methods */
        NULL,                                           /* tp_dealloc */
        NULL,                                           /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                       /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* DEPRECATED in python 3.0! */
        (reprfunc) pyrna_func_repr,     /* tp_repr */

        /* Method suites for standard classes */

        NULL,                       /* PyNumberMethods *tp_as_number; */
        NULL,                                           /* PySequenceMethods *tp_as_sequence; */
        NULL,                                           /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */

        NULL,                                           /* hashfunc tp_hash; */
        (ternaryfunc)pyrna_func_call,            /* ternaryfunc tp_call; */
        NULL,                                           /* reprfunc tp_str; */

        /* will only use these if this is a subtype of a py class */
        NULL,                                           /* getattrofunc tp_getattro; */
        NULL,                                           /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
        NULL,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        NULL,                                           /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
#ifdef USE_WEAKREFS
        offsetof(BPy_PropertyRNA, in_weakreflist),      /* long tp_weaklistoffset; */
#else
        0,
#endif

  /*** Added in release 2.2 ***/
        /*   Iterators */
        NULL,                                           /* getiterfunc tp_iter; */
        NULL,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        NULL,                                           /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        NULL,                                   /* struct PyGetSetDef *tp_getset; */
        NULL,                       /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        NULL,                                           /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                       /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};

#ifdef USE_PYRNA_ITER
/* --- collection iterator: start --- */
/* wrap rna collection iterator functions */
/*
 * RNA_property_collection_begin(...)
 * RNA_property_collection_next(...)
 * RNA_property_collection_end(...)
 */

static void pyrna_prop_collection_iter_dealloc(BPy_PropertyCollectionIterRNA *self);
static PyObject *pyrna_prop_collection_iter_next(BPy_PropertyCollectionIterRNA *self);

PyTypeObject pyrna_prop_collection_iter_Type= {
        PyVarObject_HEAD_INIT(NULL, 0)
        "bpy_prop_collection_iter",             /* tp_name */
        sizeof(BPy_PropertyCollectionIterRNA),                  /* tp_basicsize */
        0,                                                      /* tp_itemsize */
        /* methods */
        (destructor)pyrna_prop_collection_iter_dealloc, /* tp_dealloc */
        NULL,                       /* printfunc tp_print; */
        NULL,                                           /* getattrfunc tp_getattr; */
        NULL,                       /* setattrfunc tp_setattr; */
        NULL,                                           /* tp_compare */ /* DEPRECATED in python 3.0! */
        NULL,/* subclassed */           /* tp_repr */

        /* Method suites for standard classes */

        NULL,    /* PyNumberMethods *tp_as_number; */
        NULL,   /* PySequenceMethods *tp_as_sequence; */
        NULL,   /* PyMappingMethods *tp_as_mapping; */

        /* More standard operations (here for binary compatibility) */

        NULL,                                           /* hashfunc tp_hash; */
        NULL,                       /* ternaryfunc tp_call; */
        NULL,                       /* reprfunc tp_str; */

        /* will only use these if this is a subtype of a py class */
        PyObject_GenericGetAttr,        /* getattrofunc tp_getattro; */
        NULL,                                           /* setattrofunc tp_setattro; */

        /* Functions to access object as input/output buffer */
        NULL,                       /* PyBufferProcs *tp_as_buffer; */

  /*** Flags to define presence of optional/expanded features ***/
        Py_TPFLAGS_DEFAULT,         /* long tp_flags; */

        NULL,                                           /*  char *tp_doc;  Documentation string */
  /*** Assigned meaning in release 2.0 ***/
        /* call function for all accessible objects */
        NULL,                       /* traverseproc tp_traverse; */

        /* delete references to contained objects */
        NULL,                       /* inquiry tp_clear; */

  /***  Assigned meaning in release 2.1 ***/
  /*** rich comparisons ***/
        NULL, /* subclassed */          /* richcmpfunc tp_richcompare; */

  /***  weak reference enabler ***/
#ifdef USE_WEAKREFS
        offsetof(BPy_PropertyCollectionIterRNA, in_weakreflist),        /* long tp_weaklistoffset; */
#else
        0,
#endif
  /*** Added in release 2.2 ***/
        /*   Iterators */
        PyObject_SelfIter,                                              /* getiterfunc tp_iter; */
        (iternextfunc) pyrna_prop_collection_iter_next,                       /* iternextfunc tp_iternext; */

  /*** Attribute descriptor and subclassing stuff ***/
        NULL,                                           /* struct PyMethodDef *tp_methods; */
        NULL,                       /* struct PyMemberDef *tp_members; */
        NULL,                                   /* struct PyGetSetDef *tp_getset; */
        NULL,                       /* struct _typeobject *tp_base; */
        NULL,                       /* PyObject *tp_dict; */
        NULL,                       /* descrgetfunc tp_descr_get; */
        NULL,                       /* descrsetfunc tp_descr_set; */
        0,                          /* long tp_dictoffset; */
        NULL,                       /* initproc tp_init; */
        NULL,                       /* allocfunc tp_alloc; */
        NULL,                                           /* newfunc tp_new; */
        /*  Low-level free-memory routine */
        NULL,                       /* freefunc tp_free;  */
        /* For PyObject_IS_GC */
        NULL,                       /* inquiry tp_is_gc;  */
        NULL,                                           /* PyObject *tp_bases; */
        /* method resolution order */
        NULL,                       /* PyObject *tp_mro;  */
        NULL,                       /* PyObject *tp_cache; */
        NULL,                       /* PyObject *tp_subclasses; */
        NULL,                       /* PyObject *tp_weaklist; */
        NULL
};

PyObject *pyrna_prop_collection_iter_CreatePyObject(PointerRNA *ptr, PropertyRNA *prop)
{
        BPy_PropertyCollectionIterRNA *self= PyObject_New(BPy_PropertyCollectionIterRNA, &pyrna_prop_collection_iter_Type);

#ifdef USE_WEAKREFS
        self->in_weakreflist= NULL;
#endif

        RNA_property_collection_begin(ptr, prop, &self->iter);

        return (PyObject *)self;
}

static PyObject *pyrna_prop_collection_iter(BPy_PropertyRNA *self)
{
        return pyrna_prop_collection_iter_CreatePyObject(&self->ptr, self->prop);
}

static PyObject *pyrna_prop_collection_iter_next(BPy_PropertyCollectionIterRNA *self)
{
        if(self->iter.valid == FALSE) {
                PyErr_SetString(PyExc_StopIteration, "pyrna_prop_collection_iter stop");
                return NULL;
        }
        else {
                BPy_StructRNA *pyrna= (BPy_StructRNA *)pyrna_struct_CreatePyObject(&self->iter.ptr);

#ifdef USE_PYRNA_STRUCT_REFERENCE
                if(pyrna) { /* unlikely but may fail */
                        if((PyObject *)pyrna != Py_None) {
                                /* hold a reference to the iterator since it may have
                                 * allocated memory 'pyrna' needs. eg: introspecting dynamic enum's  */
                                /* TODO, we could have an api call to know if this is needed since most collections don't */
                                pyrna_struct_reference_set(pyrna, (PyObject *)self);
                        }
                }
#endif /* !USE_PYRNA_STRUCT_REFERENCE */

                RNA_property_collection_next(&self->iter);

                return (PyObject *)pyrna;
        }
}


static void pyrna_prop_collection_iter_dealloc(BPy_PropertyCollectionIterRNA *self)
{
#ifdef USE_WEAKREFS
        if (self->in_weakreflist != NULL) {
                PyObject_ClearWeakRefs((PyObject *)self);
        }
#endif

        RNA_property_collection_end(&self->iter);

        PyObject_DEL(self);
}

/* --- collection iterator: end --- */
#endif /* !USE_PYRNA_ITER */


static void pyrna_subtype_set_rna(PyObject *newclass, StructRNA *srna)
{
        PointerRNA ptr;
        PyObject *item;

        Py_INCREF(newclass);

        if (RNA_struct_py_type_get(srna))
                PyC_ObSpit("RNA WAS SET - ", RNA_struct_py_type_get(srna));

        Py_XDECREF(((PyObject *)RNA_struct_py_type_get(srna)));

        RNA_struct_py_type_set(srna, (void *)newclass); /* Store for later use */

        /* Not 100% needed but useful,
         * having an instance within a type looks wrong however this instance IS an rna type */

        /* python deals with the circular ref */
        RNA_pointer_create(NULL, &RNA_Struct, srna, &ptr);
        item= pyrna_struct_CreatePyObject(&ptr);

        /* note, must set the class not the __dict__ else the internal slots are not updated correctly */
        PyObject_SetAttr(newclass, bpy_intern_str_bl_rna, item);
        Py_DECREF(item);

        /* done with rna instance */
}

static PyObject* pyrna_srna_Subtype(StructRNA *srna);

/* return a borrowed reference */
static PyObject* pyrna_srna_PyBase(StructRNA *srna) //, PyObject *bpy_types_dict)
{
        /* Assume RNA_struct_py_type_get(srna) was already checked */
        StructRNA *base;

        PyObject *py_base= NULL;

        /* get the base type */
        base= RNA_struct_base(srna);

        if(base && base != srna) {
                /*/printf("debug subtype %s %p\n", RNA_struct_identifier(srna), srna); */
                py_base= pyrna_srna_Subtype(base); //, bpy_types_dict);
                Py_DECREF(py_base); /* srna owns, this is only to pass as an arg */
        }

        if(py_base==NULL) {
                py_base= (PyObject *)&pyrna_struct_Type;
        }

        return py_base;
}

/* check if we have a native python subclass, use it when it exists
 * return a borrowed reference */
static PyObject *bpy_types_dict= NULL;

static PyObject* pyrna_srna_ExternalType(StructRNA *srna)
{
        const char *idname= RNA_struct_identifier(srna);
        PyObject *newclass;

        if(bpy_types_dict==NULL) {
                PyObject *bpy_types= PyImport_ImportModuleLevel((char *)"bpy_types", NULL, NULL, NULL, 0);

                if(bpy_types==NULL) {
                        PyErr_Print();
                        PyErr_Clear();
                        fprintf(stderr, "pyrna_srna_ExternalType: failed to find 'bpy_types' module\n");
                        return NULL;
                }
                bpy_types_dict= PyModule_GetDict(bpy_types); // borrow
                Py_DECREF(bpy_types); // fairly safe to assume the dict is kept
        }

        newclass= PyDict_GetItemString(bpy_types_dict, idname);

        /* sanity check, could skip this unless in debug mode */
        if(newclass) {
                PyObject *base_compare= pyrna_srna_PyBase(srna);
                //PyObject *slots= PyObject_GetAttrString(newclass, "__slots__"); // cant do this because it gets superclasses values!
                //PyObject *bases= PyObject_GetAttrString(newclass, "__bases__"); // can do this but faster not to.
                PyObject *bases= ((PyTypeObject *)newclass)->tp_bases;
                PyObject *slots= PyDict_GetItem(((PyTypeObject *)newclass)->tp_dict, bpy_intern_str___slots__);

                if(slots==NULL) {
                        fprintf(stderr, "pyrna_srna_ExternalType: expected class '%s' to have __slots__ defined\n\nSee bpy_types.py\n", idname);
                        newclass= NULL;
                }
                else if(PyTuple_GET_SIZE(bases)) {
                        PyObject *base= PyTuple_GET_ITEM(bases, 0);

                        if(base_compare != base) {
                                fprintf(stderr, "pyrna_srna_ExternalType: incorrect subclassing of SRNA '%s'\nSee bpy_types.py\n", idname);
                                PyC_ObSpit("Expected! ", base_compare);
                                newclass= NULL;
                        }
                        else {
                                if(G.f & G_DEBUG)
                                        fprintf(stderr, "SRNA Subclassed: '%s'\n", idname);
                        }
                }
        }

        return newclass;
}

static PyObject* pyrna_srna_Subtype(StructRNA *srna)
{
        PyObject *newclass= NULL;

                /* stupid/simple case */
        if (srna == NULL) {
                newclass= NULL; /* Nothing to do */
        }       /* the class may have already been declared & allocated */
        else if ((newclass= RNA_struct_py_type_get(srna))) {
                Py_INCREF(newclass);
        }       /* check if bpy_types.py module has the class defined in it */
        else if ((newclass= pyrna_srna_ExternalType(srna))) {
                pyrna_subtype_set_rna(newclass, srna);
                Py_INCREF(newclass);
        }       /* create a new class instance with the C api
                 * mainly for the purposing of matching the C/rna type hierarchy */
        else {
                /* subclass equivalents
                - class myClass(myBase):
                        some='value' # or ...
                - myClass= type(name='myClass', bases=(myBase,), dict={'__module__':'bpy.types'})
                */

                /* Assume RNA_struct_py_type_get(srna) was already checked */
                PyObject *py_base= pyrna_srna_PyBase(srna);
                PyObject *metaclass;
                const char *idname= RNA_struct_identifier(srna);

                /* remove __doc__ for now */
                // const char *descr= RNA_struct_ui_description(srna);
                // if(!descr) descr= "(no docs)";
                // "__doc__", descr

                if(RNA_struct_idprops_check(srna) && !PyObject_IsSubclass(py_base, (PyObject *)&pyrna_struct_meta_idprop_Type)) {
                        metaclass= (PyObject *)&pyrna_struct_meta_idprop_Type;
                }
                else {
                        metaclass= (PyObject *)&PyType_Type;
                }

                /* always use O not N when calling, N causes refcount errors */
                newclass= PyObject_CallFunction(metaclass, (char *)"s(O){sss()}", idname, py_base, "__module__","bpy.types", "__slots__");

                /* newclass will now have 2 ref's, ???, probably 1 is internal since decrefing here segfaults */

                /* PyC_ObSpit("new class ref", newclass); */

                if (newclass) {
                        /* srna owns one, and the other is owned by the caller */
                        pyrna_subtype_set_rna(newclass, srna);

                        // XXX, adding this back segfaults blender on load.
                        // Py_DECREF(newclass); /* let srna own */
                }
                else {
                        /* this should not happen */
                        printf("Error registering '%s'\n", idname);
                        PyErr_Print();
                        PyErr_Clear();
                }
        }

        return newclass;
}

/* use for subtyping so we know which srna is used for a PointerRNA */
static StructRNA *srna_from_ptr(PointerRNA *ptr)
{
        if(ptr->type == &RNA_Struct) {
                return ptr->data;
        }
        else {
                return ptr->type;
        }
}

/* always returns a new ref, be sure to decref when done */
static PyObject* pyrna_struct_Subtype(PointerRNA *ptr)
{
        return pyrna_srna_Subtype(srna_from_ptr(ptr));
}

/*-----------------------CreatePyObject---------------------------------*/
PyObject *pyrna_struct_CreatePyObject(PointerRNA *ptr)
{
        BPy_StructRNA *pyrna= NULL;

        /* note: don't rely on this to return None since NULL data with a valid type can often crash */
        if (ptr->data==NULL && ptr->type==NULL) { /* Operator RNA has NULL data */
                Py_RETURN_NONE;
        }
        else {
                PyTypeObject *tp= (PyTypeObject *)pyrna_struct_Subtype(ptr);

                if (tp) {
                        pyrna= (BPy_StructRNA *) tp->tp_alloc(tp, 0);
                        Py_DECREF(tp); /* srna owns, cant hold a ref */
                }
                else {
                        fprintf(stderr, "Could not make type\n");
                        pyrna= (BPy_StructRNA *) PyObject_GC_New(BPy_StructRNA, &pyrna_struct_Type);
#ifdef USE_WEAKREFS
                        pyrna->in_weakreflist= NULL;
#endif
                }
        }

        if(pyrna == NULL) {
                PyErr_SetString(PyExc_MemoryError, "couldn't create bpy_struct object");
                return NULL;
        }

        pyrna->ptr= *ptr;
#ifdef PYRNA_FREE_SUPPORT
        pyrna->freeptr= FALSE;
#endif

#ifdef USE_PYRNA_STRUCT_REFERENCE
        pyrna->reference= NULL;
#endif

        // PyC_ObSpit("NewStructRNA: ", (PyObject *)pyrna);

#ifdef USE_PYRNA_INVALIDATE_WEAKREF
        if(ptr->id.data) {
                id_weakref_pool_add(ptr->id.data, (BPy_DummyPointerRNA *)pyrna);
        }
#endif
        return (PyObject *)pyrna;
}

PyObject *pyrna_prop_CreatePyObject(PointerRNA *ptr, PropertyRNA *prop)
{
        BPy_PropertyRNA *pyrna;

        if (RNA_property_array_check(ptr, prop) == 0) {
                PyTypeObject *type;

                if (RNA_property_type(prop) != PROP_COLLECTION) {
                        type= &pyrna_prop_Type;
                }
                else {
                        if((RNA_property_flag(prop) & PROP_IDPROPERTY) == 0) {
                                type= &pyrna_prop_collection_Type;
                        }
                        else {
                                type= &pyrna_prop_collection_idprop_Type;
                        }
                }

                pyrna= (BPy_PropertyRNA *) PyObject_NEW(BPy_PropertyRNA, type);
#ifdef USE_WEAKREFS
                pyrna->in_weakreflist= NULL;
#endif
        }
        else {
                pyrna= (BPy_PropertyRNA *) PyObject_NEW(BPy_PropertyArrayRNA, &pyrna_prop_array_Type);
                ((BPy_PropertyArrayRNA *)pyrna)->arraydim= 0;
                ((BPy_PropertyArrayRNA *)pyrna)->arrayoffset= 0;
#ifdef USE_WEAKREFS
                ((BPy_PropertyArrayRNA *)pyrna)->in_weakreflist= NULL;
#endif
        }

        if(pyrna == NULL) {
                PyErr_SetString(PyExc_MemoryError, "couldn't create BPy_rna object");
                return NULL;
        }

        pyrna->ptr= *ptr;
        pyrna->prop= prop;

#ifdef USE_PYRNA_INVALIDATE_WEAKREF
        if(ptr->id.data) {
                id_weakref_pool_add(ptr->id.data, (BPy_DummyPointerRNA *)pyrna);
        }
#endif

        return (PyObject *)pyrna;
}

void BPY_rna_init(void)
{
#ifdef USE_MATHUTILS // register mathutils callbacks, ok to run more then once.
        mathutils_rna_array_cb_index= Mathutils_RegisterCallback(&mathutils_rna_array_cb);
        mathutils_rna_matrix_cb_index= Mathutils_RegisterCallback(&mathutils_rna_matrix_cb);
#endif

        /* metaclass */
        pyrna_struct_meta_idprop_Type.tp_base= &PyType_Type;
        if(PyType_Ready(&pyrna_struct_meta_idprop_Type) < 0)
                return;

        if(PyType_Ready(&pyrna_struct_Type) < 0)
                return;

        if(PyType_Ready(&pyrna_prop_Type) < 0)
                return;

        if(PyType_Ready(&pyrna_prop_array_Type) < 0)
                return;

        if(PyType_Ready(&pyrna_prop_collection_Type) < 0)
                return;

        if(PyType_Ready(&pyrna_prop_collection_idprop_Type) < 0)
                return;

        if(PyType_Ready(&pyrna_func_Type) < 0)
                return;

#ifdef USE_PYRNA_ITER
        if(PyType_Ready(&pyrna_prop_collection_iter_Type) < 0)
                return;
#endif
}

/* bpy.data from python */
static PointerRNA *rna_module_ptr= NULL;
PyObject *BPY_rna_module(void)
{
        BPy_StructRNA *pyrna;
        PointerRNA ptr;

        /* for now, return the base RNA type rather than a real module */
        RNA_main_pointer_create(G.main, &ptr);
        pyrna= (BPy_StructRNA *)pyrna_struct_CreatePyObject(&ptr);

        rna_module_ptr= &pyrna->ptr;
        return (PyObject *)pyrna;
}

void BPY_update_rna_module(void)
{
        RNA_main_pointer_create(G.main, rna_module_ptr);
}

#if 0
/* This is a way we can access docstrings for RNA types
 * without having the datatypes in blender */
PyObject *BPY_rna_doc(void)
{
        PointerRNA ptr;

        /* for now, return the base RNA type rather than a real module */
        RNA_blender_rna_pointer_create(&ptr);

        return pyrna_struct_CreatePyObject(&ptr);
}
#endif


/* pyrna_basetype_* - BPy_BaseTypeRNA is just a BPy_PropertyRNA struct with a different type
 * the self->ptr and self->prop are always set to the "structs" collection */
//---------------getattr--------------------------------------------
static PyObject *pyrna_basetype_getattro(BPy_BaseTypeRNA *self, PyObject *pyname)
{
        PointerRNA newptr;
        PyObject *ret;
        const char *name= _PyUnicode_AsString(pyname);

        if(name == NULL) {
                PyErr_SetString(PyExc_AttributeError, "bpy.types: __getattr__ must be a string");
                ret= NULL;
        }
        else if (RNA_property_collection_lookup_string(&self->ptr, self->prop, name, &newptr)) {
                ret= pyrna_struct_Subtype(&newptr);
                if (ret==NULL) {
                        PyErr_Format(PyExc_RuntimeError,
                                     "bpy.types.%.200s subtype could not be generated, this is a bug!",
                                     _PyUnicode_AsString(pyname));
                }
        }
        else {
#if 0
                PyErr_Format(PyExc_AttributeError,
                             "bpy.types.%.200s RNA_Struct does not exist",
                             _PyUnicode_AsString(pyname));
                return NULL;
#endif
                /* The error raised here will be displayed */
                ret= PyObject_GenericGetAttr((PyObject *)self, pyname);
        }

        return ret;
}

static PyObject *pyrna_basetype_dir(BPy_BaseTypeRNA *self);
static PyObject *pyrna_register_class(PyObject *self, PyObject *py_class);
static PyObject *pyrna_unregister_class(PyObject *self, PyObject *py_class);

static struct PyMethodDef pyrna_basetype_methods[]= {
        {"__dir__", (PyCFunction)pyrna_basetype_dir, METH_NOARGS, ""},
        {NULL, NULL, 0, NULL}
};

static PyObject *pyrna_basetype_dir(BPy_BaseTypeRNA *self)
{
        PyObject *list;
#if 0
        PyObject *name;
        PyMethodDef *meth;
#endif

        list= pyrna_prop_collection_keys(self); /* like calling structs.keys(), avoids looping here */

#if 0 /* for now only contains __dir__ */
        for(meth=pyrna_basetype_methods; meth->ml_name; meth++) {
                name= PyUnicode_FromString(meth->ml_name);
                PyList_Append(list, name);
                Py_DECREF(name);
        }
#endif
        return list;
}

static PyTypeObject pyrna_basetype_Type= BLANK_PYTHON_TYPE;

PyObject *BPY_rna_types(void)
{
        BPy_BaseTypeRNA *self;

        if ((pyrna_basetype_Type.tp_flags & Py_TPFLAGS_READY)==0) {
                pyrna_basetype_Type.tp_name= "RNA_Types";
                pyrna_basetype_Type.tp_basicsize= sizeof(BPy_BaseTypeRNA);
                pyrna_basetype_Type.tp_getattro= (getattrofunc) pyrna_basetype_getattro;
                pyrna_basetype_Type.tp_flags= Py_TPFLAGS_DEFAULT;
                pyrna_basetype_Type.tp_methods= pyrna_basetype_methods;

                if(PyType_Ready(&pyrna_basetype_Type) < 0)
                        return NULL;
        }

        self= (BPy_BaseTypeRNA *)PyObject_NEW(BPy_BaseTypeRNA, &pyrna_basetype_Type);

        /* avoid doing this lookup for every getattr */
        RNA_blender_rna_pointer_create(&self->ptr);
        self->prop= RNA_struct_find_property(&self->ptr, "structs");
#ifdef USE_WEAKREFS
        self->in_weakreflist= NULL;
#endif
        return (PyObject *)self;
}

StructRNA *pyrna_struct_as_srna(PyObject *self, int parent, const char *error_prefix)
{
        BPy_StructRNA *py_srna= NULL;
        StructRNA *srna;

        /* ack, PyObject_GetAttrString wont look up this types tp_dict first :/ */
        if(PyType_Check(self)) {
                py_srna= (BPy_StructRNA *)PyDict_GetItem(((PyTypeObject *)self)->tp_dict, bpy_intern_str_bl_rna);
                Py_XINCREF(py_srna);
        }

        if(parent) {
                /* be very careful with this since it will return a parent classes srna.
                 * modifying this will do confusing stuff! */
                if(py_srna==NULL)
                        py_srna= (BPy_StructRNA*)PyObject_GetAttr(self, bpy_intern_str_bl_rna);
        }

        if(py_srna==NULL) {
                PyErr_Format(PyExc_RuntimeError,
                             "%.200s, missing bl_rna attribute from '%.200s' instance (may not be registered)",
                             error_prefix, Py_TYPE(self)->tp_name);
                return NULL;
        }

        if(!BPy_StructRNA_Check(py_srna)) {
                PyErr_Format(PyExc_TypeError,
                             "%.200s, bl_rna attribute wrong type '%.200s' on '%.200s'' instance",
                             error_prefix, Py_TYPE(py_srna)->tp_name,
                             Py_TYPE(self)->tp_name);
                Py_DECREF(py_srna);
                return NULL;
        }

        if(py_srna->ptr.type != &RNA_Struct) {
                PyErr_Format(PyExc_TypeError,
                             "%.200s, bl_rna attribute not a RNA_Struct, on '%.200s'' instance",
                             error_prefix, Py_TYPE(self)->tp_name);
                Py_DECREF(py_srna);
                return NULL;
        }

        srna= py_srna->ptr.data;
        Py_DECREF(py_srna);

        return srna;
}

/* Orphan functions, not sure where they should go */
/* get the srna for methods attached to types */
/*
 * Caller needs to raise error.*/
StructRNA *srna_from_self(PyObject *self, const char *error_prefix)
{

        if(self==NULL) {
                return NULL;
        }
        else if (PyCapsule_CheckExact(self)) {
                return PyCapsule_GetPointer(self, NULL);
        }
        else if (PyType_Check(self)==0) {
                return NULL;
        }
        else {
                /* These cases above not errors, they just mean the type was not compatible
                 * After this any errors will be raised in the script */

                PyObject *error_type, *error_value, *error_traceback;
                StructRNA *srna;

                PyErr_Fetch(&error_type, &error_value, &error_traceback);
                PyErr_Clear();

                srna= pyrna_struct_as_srna(self, 0, error_prefix);

                if(!PyErr_Occurred()) {
                        PyErr_Restore(error_type, error_value, error_traceback);
                }

                return srna;
        }
}

static int deferred_register_prop(StructRNA *srna, PyObject *key, PyObject *item)
{
        /* We only care about results from C which
         * are for sure types, save some time with error */
        if(pyrna_is_deferred_prop(item)) {

                PyObject *py_func, *py_kw, *py_srna_cobject, *py_ret;

                if(PyArg_ParseTuple(item, "OO!", &py_func, &PyDict_Type, &py_kw)) {
                        PyObject *args_fake;

                        if(*_PyUnicode_AsString(key)=='_') {
                                PyErr_Format(PyExc_ValueError,
                                             "bpy_struct \"%.200s\" registration error: "
                                             "%.200s could not register because the property starts with an '_'\n",
                                             RNA_struct_identifier(srna), _PyUnicode_AsString(key));
                                return -1;
                        }
                        py_srna_cobject= PyCapsule_New(srna, NULL, NULL);

                        /* not 100% nice :/, modifies the dict passed, should be ok */
                        PyDict_SetItem(py_kw, bpy_intern_str_attr, key);

                        args_fake= PyTuple_New(1);
                        PyTuple_SET_ITEM(args_fake, 0, py_srna_cobject);

                        py_ret= PyObject_Call(py_func, args_fake, py_kw);

                        Py_DECREF(args_fake); /* free's py_srna_cobject too */

                        if(py_ret) {
                                Py_DECREF(py_ret);
                        }
                        else {
                                PyErr_Print();
                                PyErr_Clear();

                                // PyC_LineSpit();
                                PyErr_Format(PyExc_ValueError,
                                             "bpy_struct \"%.200s\" registration error: "
                                             "%.200s could not register\n",
                                             RNA_struct_identifier(srna), _PyUnicode_AsString(key));
                                return -1;
                        }
                }
                else {
                        /* Since this is a class dict, ignore args that can't be passed */

                        /* for testing only */
                        /* PyC_ObSpit("Why doesn't this work??", item);
                        PyErr_Print(); */
                        PyErr_Clear();
                }
        }

        return 0;
}

static int pyrna_deferred_register_props(StructRNA *srna, PyObject *class_dict)
{
        PyObject *item, *key;
        PyObject *order;
        Py_ssize_t pos= 0;
        int ret= 0;

        /* in both cases PyDict_CheckExact(class_dict) will be true even
         * though Operators have a metaclass dict namespace */

        if((order= PyDict_GetItem(class_dict, bpy_intern_str_order)) && PyList_CheckExact(order)) {
                for(pos= 0; pos<PyList_GET_SIZE(order); pos++) {
                        key= PyList_GET_ITEM(order, pos);
                        item= PyDict_GetItem(class_dict, key);
                        ret= deferred_register_prop(srna, key, item);
                        if(ret != 0)
                                break;
                }
        }
        else {
                while (PyDict_Next(class_dict, &pos, &key, &item)) {
                        ret= deferred_register_prop(srna, key, item);

                        if(ret != 0)
                                break;
                }
        }

        return ret;
}

static int pyrna_deferred_register_class_recursive(StructRNA *srna, PyTypeObject *py_class)
{
        const int len= PyTuple_GET_SIZE(py_class->tp_bases);
        int i, ret;

        /* first scan base classes for registerable properties */
        for(i=0; i<len; i++) {
                PyTypeObject *py_superclass= (PyTypeObject *)PyTuple_GET_ITEM(py_class->tp_bases, i);

                /* the rules for using these base classes are not clear,
                 * 'object' is of course not worth looking into and
                 * existing subclasses of RNA would cause a lot more dictionary
                 * looping then is needed (SomeOperator would scan Operator.__dict__)
                 * which is harmless but not at all useful.
                 *
                 * So only scan base classes which are not subclasses if blender types.
                 * This best fits having 'mix-in' classes for operators and render engines.
                 * */
                if(     py_superclass != &PyBaseObject_Type &&
                        !PyObject_IsSubclass((PyObject *)py_superclass, (PyObject *)&pyrna_struct_Type)
                ) {
                        ret= pyrna_deferred_register_class_recursive(srna, py_superclass);

                        if(ret != 0) {
                                return ret;
                        }
                }
        }

        /* not register out own properties */
        return pyrna_deferred_register_props(srna, py_class->tp_dict); /* getattr(..., "__dict__") returns a proxy */
}

int pyrna_deferred_register_class(StructRNA *srna, PyObject *py_class)
{
        /* Panels and Menus dont need this
         * save some time and skip the checks here */
        if(!RNA_struct_idprops_register_check(srna))
                return 0;

        return pyrna_deferred_register_class_recursive(srna, (PyTypeObject *)py_class);
}

/*-------------------- Type Registration ------------------------*/

static int rna_function_arg_count(FunctionRNA *func)
{
        const ListBase *lb= RNA_function_defined_parameters(func);
        PropertyRNA *parm;
        Link *link;
        int count= (RNA_function_flag(func) & FUNC_NO_SELF) ? 0 : 1;

        for(link=lb->first; link; link=link->next) {
                parm= (PropertyRNA*)link;
                if(!(RNA_property_flag(parm) & PROP_OUTPUT))
                        count++;
        }

        return count;
}

static int bpy_class_validate(PointerRNA *dummyptr, void *py_data, int *have_function)
{
        const ListBase *lb;
        Link *link;
        FunctionRNA *func;
        PropertyRNA *prop;
        StructRNA *srna= dummyptr->type;
        const char *class_type= RNA_struct_identifier(srna);
        PyObject *py_class= (PyObject*)py_data;
        PyObject *base_class= RNA_struct_py_type_get(srna);
        PyObject *item;
        int i, flag, arg_count, func_arg_count;
        const char *py_class_name= ((PyTypeObject *)py_class)->tp_name; // __name__


        if (base_class) {
                if (!PyObject_IsSubclass(py_class, base_class)) {
                        PyErr_Format(PyExc_TypeError,
                                     "expected %.200s subclass of class \"%.200s\"",
                                     class_type, py_class_name);
                        return -1;
                }
        }

        /* verify callback functions */
        lb= RNA_struct_type_functions(srna);
        i= 0;
        for(link=lb->first; link; link=link->next) {
                func= (FunctionRNA*)link;
                flag= RNA_function_flag(func);

                if(!(flag & FUNC_REGISTER))
                        continue;

                item= PyObject_GetAttrString(py_class, RNA_function_identifier(func));

                have_function[i]= (item != NULL);
                i++;

                if (item==NULL) {
                        if ((flag & FUNC_REGISTER_OPTIONAL)==0) {
                                PyErr_Format(PyExc_AttributeError,
                                             "expected %.200s, %.200s class to have an \"%.200s\" attribute",
                                             class_type, py_class_name,
                                             RNA_function_identifier(func));
                                return -1;
                        }

                        PyErr_Clear();
                }
                else {
                        Py_DECREF(item); /* no need to keep a ref, the class owns it (technically we should keep a ref but...) */
                        if(flag & FUNC_NO_SELF) {
                                if (PyMethod_Check(item)==0) {
                                        PyErr_Format(PyExc_TypeError,
                                                     "expected %.200s, %.200s class \"%.200s\" attribute to be a method, not a %.200s",
                                                     class_type, py_class_name, RNA_function_identifier(func), Py_TYPE(item)->tp_name);
                                        return -1;
                                }
                                item= ((PyMethodObject *)item)->im_func;
                        }
                        else {
                                if (PyFunction_Check(item)==0) {
                                        PyErr_Format(PyExc_TypeError,
                                                     "expected %.200s, %.200s class \"%.200s\" attribute to be a function, not a %.200s",
                                                     class_type, py_class_name, RNA_function_identifier(func), Py_TYPE(item)->tp_name);
                                        return -1;
                                }
                        }

                        func_arg_count= rna_function_arg_count(func);

                        if (func_arg_count >= 0) { /* -1 if we dont care*/
                                arg_count= ((PyCodeObject *)PyFunction_GET_CODE(item))->co_argcount;

                                /* note, the number of args we check for and the number of args we give to
                                 * @classmethods are different (quirk of python), this is why rna_function_arg_count() doesn't return the value -1*/
                                if(flag & FUNC_NO_SELF)
                                        func_arg_count++;

                                if (arg_count != func_arg_count) {
                                        PyErr_Format(PyExc_ValueError,
                                                     "expected %.200s, %.200s class \"%.200s\" function to have %d args, found %d",
                                                     class_type, py_class_name, RNA_function_identifier(func),
                                                     func_arg_count, arg_count);
                                        return -1;
                                }
                        }
                }
        }

        /* verify properties */
        lb= RNA_struct_type_properties(srna);
        for(link=lb->first; link; link=link->next) {
                const char *identifier;
                prop= (PropertyRNA*)link;
                flag= RNA_property_flag(prop);

                if(!(flag & PROP_REGISTER))
                        continue;

                identifier= RNA_property_identifier(prop);
                item= PyObject_GetAttrString(py_class, identifier);

                if (item==NULL) {
                        /* Sneaky workaround to use the class name as the bl_idname */

#define         BPY_REPLACEMENT_STRING(rna_attr, py_attr) \
                        if(strcmp(identifier, rna_attr) == 0) { \
                                item= PyObject_GetAttrString(py_class, py_attr); \
                                if(item && item != Py_None) { \
                                        if(pyrna_py_to_prop(dummyptr, prop, NULL, item, "validating class:") != 0) { \
                                                Py_DECREF(item); \
                                                return -1; \
                                        } \
                                } \
                                Py_XDECREF(item); \
                        } \


                        BPY_REPLACEMENT_STRING("bl_idname", "__name__");
                        BPY_REPLACEMENT_STRING("bl_description", "__doc__");

#undef          BPY_REPLACEMENT_STRING

                        if (item == NULL && (((flag & PROP_REGISTER_OPTIONAL) != PROP_REGISTER_OPTIONAL))) {
                                PyErr_Format(PyExc_AttributeError,
                                             "expected %.200s, %.200s class to have an \"%.200s\" attribute",
                                             class_type, py_class_name, identifier);
                                return -1;
                        }

                        PyErr_Clear();
                }
                else {
                        Py_DECREF(item); /* no need to keep a ref, the class owns it */

                        if(pyrna_py_to_prop(dummyptr, prop, NULL, item, "validating class:") != 0)
                                return -1;
                }
        }

        return 0;
}

/* TODO - multiple return values like with rna functions */
static int bpy_class_call(bContext *C, PointerRNA *ptr, FunctionRNA *func, ParameterList *parms)
{
        PyObject *args;
        PyObject *ret= NULL, *py_srna= NULL, *py_class_instance= NULL, *parmitem;
        PyTypeObject *py_class;
        void **py_class_instance_store= NULL;
        PropertyRNA *parm;
        ParameterIterator iter;
        PointerRNA funcptr;
        int err= 0, i, flag, ret_len=0;
        int is_static= RNA_function_flag(func) & FUNC_NO_SELF;

        PropertyRNA *pret_single= NULL;
        void *retdata_single= NULL;

        PyGILState_STATE gilstate;

#ifdef USE_PEDANTIC_WRITE
        const int is_operator= RNA_struct_is_a(ptr->type, &RNA_Operator);
        const char *func_id= RNA_function_identifier(func);
        /* testing, for correctness, not operator and not draw function */
        const short is_readonly= strstr("draw", func_id) || /*strstr("render", func_id) ||*/ !is_operator;
#endif

        py_class= RNA_struct_py_type_get(ptr->type);

        /* rare case. can happen when registering subclasses */
        if(py_class==NULL) {
                fprintf(stderr, "bpy_class_call(): unable to get python class for rna struct '%.200s'\n", RNA_struct_identifier(ptr->type));
                return -1;
        }

        /* XXX, this is needed because render engine calls without a context
         * this should be supported at some point but at the moment its not! */
        if(C==NULL)
                C= BPy_GetContext();

        bpy_context_set(C, &gilstate);

        if (!is_static) {
                /* some datatypes (operator, render engine) can store PyObjects for re-use */
                if(ptr->data) {
                        void **instance = RNA_struct_instance(ptr);

                        if(instance) {
                                if(*instance) {
                                        py_class_instance= *instance;
                                        Py_INCREF(py_class_instance);
                                }
                                else {
                                        /* store the instance here once its created */
                                        py_class_instance_store= instance;
                                }
                        }
                }
                /* end exception */

                if(py_class_instance==NULL)
                        py_srna= pyrna_struct_CreatePyObject(ptr);

                if(py_class_instance) {
                        /* special case, instance is cached */
                }
                else if(py_srna == NULL) {
                        py_class_instance= NULL;
                }
                else if(py_srna == Py_None) { /* probably wont ever happen but possible */
                        Py_DECREF(py_srna);
                        py_class_instance= NULL;
                }
                else {
#if 1
                        /* Skip the code below and call init directly on the allocated 'py_srna'
                         * otherwise __init__() always needs to take a second self argument, see pyrna_struct_new().
                         * Although this is annoying to have to impliment a part of pythons typeobject.c:type_call().
                         */
                        if(py_class->tp_init) {
#ifdef USE_PEDANTIC_WRITE
                                const int prev_write= rna_disallow_writes;
                                rna_disallow_writes= is_operator ? FALSE : TRUE; /* only operators can write on __init__ */
#endif

                                /* true in most cases even when the class its self doesn't define an __init__ function. */
                                args= PyTuple_New(0);
                                if (py_class->tp_init(py_srna, args, NULL) < 0) {
                                        Py_DECREF(py_srna);
                                        py_srna= NULL;
                                        /* err set below */
                                }
                                Py_DECREF(args);
#ifdef USE_PEDANTIC_WRITE
                                rna_disallow_writes= prev_write;
#endif
                        }
                        py_class_instance= py_srna;

#else
                        const int prev_write= rna_disallow_writes;
                        rna_disallow_writes= TRUE;

                        /* 'almost' all the time calling the class isn't needed.
                         * We could just do...
                        py_class_instance= py_srna;
                        Py_INCREF(py_class_instance);
                         * This would work fine but means __init__ functions wouldnt run.
                         * none of blenders default scripts use __init__ but its nice to call it
                         * for general correctness. just to note why this is here when it could be safely removed.
                         */
                        args= PyTuple_New(1);
                        PyTuple_SET_ITEM(args, 0, py_srna);
                        py_class_instance= PyObject_Call(py_class, args, NULL);
                        Py_DECREF(args);

                        rna_disallow_writes= prev_write;

#endif

                        if(py_class_instance == NULL) {
                                err= -1; /* so the error is not overridden below */
                        }
                        else if(py_class_instance_store) {
                                *py_class_instance_store= py_class_instance;
                                Py_INCREF(py_class_instance);
                        }
                }
        }

        if (err != -1 && (is_static || py_class_instance)) { /* Initializing the class worked, now run its invoke function */
                PyObject *item= PyObject_GetAttrString((PyObject *)py_class, RNA_function_identifier(func));
//              flag= RNA_function_flag(func);

                if(item) {
                        RNA_pointer_create(NULL, &RNA_Function, func, &funcptr);

                        args= PyTuple_New(rna_function_arg_count(func)); /* first arg is included in 'item' */

                        if(is_static) {
                                i= 0;
                        }
                        else {
                                PyTuple_SET_ITEM(args, 0, py_class_instance);
                                i= 1;
                        }

                        RNA_parameter_list_begin(parms, &iter);

                        /* parse function parameters */
                        for (; iter.valid; RNA_parameter_list_next(&iter)) {
                                parm= iter.parm;
                                flag= RNA_property_flag(parm);

                                /* only useful for single argument returns, we'll need another list loop for multiple */
                                if (flag & PROP_OUTPUT) {
                                        ret_len++;
                                        if (pret_single==NULL) {
                                                pret_single= parm;
                                                retdata_single= iter.data;
                                        }

                                        continue;
                                }

                                parmitem= pyrna_param_to_py(&funcptr, parm, iter.data);
                                PyTuple_SET_ITEM(args, i, parmitem);
                                i++;
                        }

#ifdef USE_PEDANTIC_WRITE
                        rna_disallow_writes= is_readonly ? TRUE:FALSE;
#endif
                        /* *** Main Caller *** */

                        ret= PyObject_Call(item, args, NULL);

                        /* *** Done Calling *** */

#ifdef USE_PEDANTIC_WRITE
                        rna_disallow_writes= FALSE;
#endif

                        RNA_parameter_list_end(&iter);
                        Py_DECREF(item);
                        Py_DECREF(args);
                }
                else {
                        PyErr_Print();
                        PyErr_Clear();
                        PyErr_Format(PyExc_TypeError,
                                     "could not find function %.200s in %.200s to execute callback",
                                     RNA_function_identifier(func), RNA_struct_identifier(ptr->type));
                        err= -1;
                }
        }
        else {
                /* the error may be already set if the class instance couldn't be created */
                if(err != -1) {
                        PyErr_Format(PyExc_RuntimeError,
                                     "could not create instance of %.200s to call callback function %.200s",
                                     RNA_struct_identifier(ptr->type), RNA_function_identifier(func));
                        err= -1;
                }
        }

        if (ret == NULL) { /* covers py_class_instance failing too */
                err= -1;
        }
        else {
                if(ret_len==0 && ret != Py_None) {
                        PyErr_Format(PyExc_RuntimeError,
                                     "expected class %.200s, function %.200s to return None, not %.200s",
                                     RNA_struct_identifier(ptr->type), RNA_function_identifier(func),
                                     Py_TYPE(ret)->tp_name);
                        err= -1;
                }
                else if(ret_len==1) {
                        err= pyrna_py_to_prop(&funcptr, pret_single, retdata_single, ret, "calling class function:");
                }
                else if (ret_len > 1) {

                        if(PyTuple_Check(ret)==0) {
                                PyErr_Format(PyExc_RuntimeError,
                                             "expected class %.200s, function %.200s to return a tuple of size %d, not %.200s",
                                             RNA_struct_identifier(ptr->type), RNA_function_identifier(func),
                                             ret_len, Py_TYPE(ret)->tp_name);
                                err= -1;
                        }
                        else if (PyTuple_GET_SIZE(ret) != ret_len) {
                                PyErr_Format(PyExc_RuntimeError,
                                             "class %.200s, function %.200s to returned %d items, expected %d",
                                             RNA_struct_identifier(ptr->type), RNA_function_identifier(func),
                                             PyTuple_GET_SIZE(ret), ret_len);
                                err= -1;
                        }
                        else {

                                RNA_parameter_list_begin(parms, &iter);

                                /* parse function parameters */
                                for (i= 0; iter.valid; RNA_parameter_list_next(&iter)) {
                                        parm= iter.parm;
                                        flag= RNA_property_flag(parm);

                                        /* only useful for single argument returns, we'll need another list loop for multiple */
                                        if (flag & PROP_OUTPUT) {
                                                err= pyrna_py_to_prop(&funcptr, parm, iter.data, PyTuple_GET_ITEM(ret, i++), "calling class function:");
                                                if(err)
                                                        break;
                                        }
                                }

                                RNA_parameter_list_end(&iter);
                        }
                }
                Py_DECREF(ret);
        }

        if(err != 0) {
                ReportList *reports;
                /* alert the user, else they wont know unless they see the console. */
                if (!is_static && ptr->data && RNA_struct_is_a(ptr->type, &RNA_Operator)) {
                        wmOperator *op= ptr->data;
                        reports= op->reports;
                }
                else {
                        /* wont alert users but they can view in 'info' space */
                        reports= CTX_wm_reports(C);
                }

                BPy_errors_to_report(reports);

                /* also print in the console for py */
                PyErr_Print();
                PyErr_Clear();
        }

        bpy_context_clear(C, &gilstate);

        return err;
}

static void bpy_class_free(void *pyob_ptr)
{
        PyObject *self= (PyObject *)pyob_ptr;
        PyGILState_STATE gilstate;

        gilstate= PyGILState_Ensure();

        // breaks re-registering classes
        // PyDict_Clear(((PyTypeObject*)self)->tp_dict);
        //
        // remove the rna attribute instead.
        PyDict_DelItem(((PyTypeObject *)self)->tp_dict, bpy_intern_str_bl_rna);
        if(PyErr_Occurred())
                PyErr_Clear();

#if 0 /* needs further investigation, too annoying so quiet for now */
        if(G.f&G_DEBUG) {
                if(self->ob_refcnt > 1) {
                        PyC_ObSpit("zombie class - ref should be 1", self);
                }
        }
#endif
        Py_DECREF((PyObject *)pyob_ptr);

        PyGILState_Release(gilstate);
}

void pyrna_alloc_types(void)
{
        PyGILState_STATE gilstate;

        PointerRNA ptr;
        PropertyRNA *prop;

        gilstate= PyGILState_Ensure();

        /* avoid doing this lookup for every getattr */
        RNA_blender_rna_pointer_create(&ptr);
        prop= RNA_struct_find_property(&ptr, "structs");

        RNA_PROP_BEGIN(&ptr, itemptr, prop) {
                PyObject *item= pyrna_struct_Subtype(&itemptr);
                if(item == NULL) {
                        if(PyErr_Occurred()) {
                                PyErr_Print();
                                PyErr_Clear();
                        }
                }
                else {
                        Py_DECREF(item);
                }
        }
        RNA_PROP_END;

        PyGILState_Release(gilstate);
}


void pyrna_free_types(void)
{
        PointerRNA ptr;
        PropertyRNA *prop;

        /* avoid doing this lookup for every getattr */
        RNA_blender_rna_pointer_create(&ptr);
        prop= RNA_struct_find_property(&ptr, "structs");


        RNA_PROP_BEGIN(&ptr, itemptr, prop) {
                StructRNA *srna= srna_from_ptr(&itemptr);
                void *py_ptr= RNA_struct_py_type_get(srna);

                if(py_ptr) {
#if 0   // XXX - should be able to do this but makes python crash on exit
                        bpy_class_free(py_ptr);
#endif
                        RNA_struct_py_type_set(srna, NULL);
                }
        }
        RNA_PROP_END;

}

/* Note! MemLeak XXX
 *
 * There is currently a bug where moving registering a python class does
 * not properly manage refcounts from the python class, since the srna owns
 * the python class this should not be so tricky but changing the references as
 * you'd expect when changing ownership crashes blender on exit so I had to comment out
 * the decref. This is not so bad because the leak only happens when re-registering (hold F8)
 * - Should still be fixed - Campbell
 * */
PyDoc_STRVAR(pyrna_register_class_doc,
".. method:: register_class(cls)\n"
"\n"
"   Register a subclass of a blender type in (:class:`Panel`,\n"
"   :class:`Menu`, :class:`Header`, :class:`Operator`,\n"
"   :class:`KeyingSetInfo`, :class:`RenderEngine`).\n"
"\n"
"   If the class has a *register* class method it will be called\n"
"   before registration.\n"
"\n"
"   .. note::\n"
"\n"
"      :exc:`ValueError` exception is raised if the class is not a\n"
"      subclass of a registerable blender class.\n"
"\n"
);
PyMethodDef meth_bpy_register_class= {"register_class", pyrna_register_class, METH_O, pyrna_register_class_doc};
static PyObject *pyrna_register_class(PyObject *UNUSED(self), PyObject *py_class)
{
        bContext *C= NULL;
        ReportList reports;
        StructRegisterFunc reg;
        StructRNA *srna;
        StructRNA *srna_new;
        const char *identifier;
        PyObject *py_cls_meth;

        if(PyDict_GetItem(((PyTypeObject*)py_class)->tp_dict, bpy_intern_str_bl_rna)) {
                PyErr_SetString(PyExc_AttributeError, "register_class(...): already registered as a subclass");
                return NULL;
        }

        /* warning: gets parent classes srna, only for the register function */
        srna= pyrna_struct_as_srna(py_class, 1, "register_class(...):");
        if(srna==NULL)
                return NULL;

        /* fails in cases, cant use this check but would like to :| */
        /*
        if(RNA_struct_py_type_get(srna)) {
                PyErr_Format(PyExc_ValueError,
                             "register_class(...): %.200s's parent class %.200s is already registered, this is not allowed",
                             ((PyTypeObject*)py_class)->tp_name, RNA_struct_identifier(srna));
                return NULL;
        }
        */

        /* check that we have a register callback for this type */
        reg= RNA_struct_register(srna);

        if(!reg) {
                PyErr_Format(PyExc_ValueError,
                             "register_class(...): expected a subclass of a registerable "
                             "rna type (%.200s does not support registration)",
                             RNA_struct_identifier(srna));
                return NULL;
        }

        /* get the context, so register callback can do necessary refreshes */
        C= BPy_GetContext();

        /* call the register callback with reports & identifier */
        BKE_reports_init(&reports, RPT_STORE);

        identifier= ((PyTypeObject*)py_class)->tp_name;

        srna_new= reg(CTX_data_main(C), &reports, py_class, identifier, bpy_class_validate, bpy_class_call, bpy_class_free);

        if(BPy_reports_to_error(&reports, PyExc_RuntimeError, TRUE) == -1)
                return NULL;

        /* python errors validating are not converted into reports so the check above will fail.
         * the cause for returning NULL will be printed as an error */
        if(srna_new == NULL)
                return NULL;

        pyrna_subtype_set_rna(py_class, srna_new); /* takes a ref to py_class */

        /* old srna still references us, keep the check incase registering somehow can free it */
        if(RNA_struct_py_type_get(srna)) {
                RNA_struct_py_type_set(srna, NULL);
                // Py_DECREF(py_class); // should be able to do this XXX since the old rna adds a new ref.
        }

        /* Can't use this because it returns a dict proxy
         *
         * item= PyObject_GetAttrString(py_class, "__dict__");
         */
        if(pyrna_deferred_register_class(srna_new, py_class)!=0)
                return NULL;

        /* call classed register method () */
        py_cls_meth= PyObject_GetAttr(py_class, bpy_intern_str_register);
        if(py_cls_meth == NULL) {
                PyErr_Clear();
        }
        else {
                PyObject *ret= PyObject_CallObject(py_cls_meth, NULL);
                if(ret) {
                        Py_DECREF(ret);
                }
                else {
                        return NULL;
                }
        }

        Py_RETURN_NONE;
}


static int pyrna_srna_contains_pointer_prop_srna(StructRNA *srna_props, StructRNA *srna, const char **prop_identifier)
{
        PropertyRNA *prop;
        LinkData *link;

        /* verify properties */
        const ListBase *lb= RNA_struct_type_properties(srna);

        for(link=lb->first; link; link=link->next) {
                prop= (PropertyRNA*)link;
                if(RNA_property_type(prop) == PROP_POINTER && !(RNA_property_flag(prop) & PROP_BUILTIN)) {
                        PointerRNA tptr;
                        RNA_pointer_create(NULL, &RNA_Struct, srna_props, &tptr);

                        if(RNA_property_pointer_type(&tptr, prop) == srna) {
                                *prop_identifier= RNA_property_identifier(prop);
                                return 1;
                        }
                }
        }

        return 0;
}

PyDoc_STRVAR(pyrna_unregister_class_doc,
".. method:: unregister_class(cls)\n"
"\n"
"   Unload the python class from blender.\n"
"\n"
"   If the class has an *unregister* class method it will be called\n"
"   before unregistering.\n"
);
PyMethodDef meth_bpy_unregister_class= {"unregister_class", pyrna_unregister_class, METH_O, pyrna_unregister_class_doc};
static PyObject *pyrna_unregister_class(PyObject *UNUSED(self), PyObject *py_class)
{
        bContext *C= NULL;
        StructUnregisterFunc unreg;
        StructRNA *srna;
        PyObject *py_cls_meth;

        /*if(PyDict_GetItem(((PyTypeObject*)py_class)->tp_dict, bpy_intern_str_bl_rna)==NULL) {
                PWM_cursor_wait(0);
                PyErr_SetString(PyExc_ValueError, "unregister_class(): not a registered as a subclass");
                return NULL;
        }*/

        srna= pyrna_struct_as_srna(py_class, 0, "unregister_class(...):");
        if(srna==NULL)
                return NULL;

        /* check that we have a unregister callback for this type */
        unreg= RNA_struct_unregister(srna);

        if(!unreg) {
                PyErr_SetString(PyExc_ValueError, "unregister_class(...): expected a Type subclassed from a registerable rna type (no unregister supported)");
                return NULL;
        }

        /* call classed unregister method */
        py_cls_meth= PyObject_GetAttr(py_class, bpy_intern_str_unregister);
        if(py_cls_meth == NULL) {
                PyErr_Clear();
        }
        else {
                PyObject *ret= PyObject_CallObject(py_cls_meth, NULL);
                if(ret) {
                        Py_DECREF(ret);
                }
                else {
                        return NULL;
                }
        }

        /* should happen all the time but very slow */
        if(G.f & G_DEBUG) {
                /* remove all properties using this class */
                StructRNA *srna_iter;
                PointerRNA ptr_rna;
                PropertyRNA *prop_rna;
                const char *prop_identifier= NULL;

                RNA_blender_rna_pointer_create(&ptr_rna);
                prop_rna= RNA_struct_find_property(&ptr_rna, "structs");



                /* loop over all structs */
                RNA_PROP_BEGIN(&ptr_rna, itemptr, prop_rna) {
                        srna_iter= itemptr.data;
                        if(pyrna_srna_contains_pointer_prop_srna(srna_iter, srna, &prop_identifier)) {
                                break;
                        }
                }
                RNA_PROP_END;

                if(prop_identifier) {
                        PyErr_Format(PyExc_RuntimeError,
                                     "unregister_class(...): can't unregister %s because %s.%s pointer property is using this",
                                     RNA_struct_identifier(srna), RNA_struct_identifier(srna_iter), prop_identifier);
                        return NULL;
                }
        }

        /* get the context, so register callback can do necessary refreshes */
        C= BPy_GetContext();

        /* call unregister */
        unreg(CTX_data_main(C), srna); /* calls bpy_class_free, this decref's py_class */

        PyDict_DelItem(((PyTypeObject *)py_class)->tp_dict, bpy_intern_str_bl_rna);
        if(PyErr_Occurred())
                PyErr_Clear(); //return NULL;

        Py_RETURN_NONE;
}