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Differential D15755 Diff 54897 source/blender/python/intern/bpy_rna.c

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source/blender/python/intern/bpy_rna.c

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{ {
PointerRNA newptr; PointerRNA newptr;
Py_ssize_t keynum_abs = keynum; Py_ssize_t keynum_abs = keynum;
PYRNA_PROP_CHECK_OBJ(self); PYRNA_PROP_CHECK_OBJ(self);
PYRNA_PROP_COLLECTION_ABS_INDEX(NULL); PYRNA_PROP_COLLECTION_ABS_INDEX(NULL);
if (RNA_property_collection_lookup_int_has_fn(self->prop)) {
if (RNA_property_collection_lookup_int(&self->ptr, self->prop, keynum_abs, &newptr)) { if (RNA_property_collection_lookup_int(&self->ptr, self->prop, keynum_abs, &newptr)) {
return pyrna_struct_CreatePyObject(&newptr); return pyrna_struct_CreatePyObject(&newptr);
} }
}
else {
/* No callback defined, just iterate and find the nth item. */
const int key = (int)keynum;
PyObject *result = NULL;
bool found = false;
CollectionPropertyIterator iter;
RNA_property_collection_begin(&self->ptr, self->prop, &iter);
for (int i = 0; iter.valid; RNA_property_collection_next(&iter), i++) {
if (i == key) {
result = pyrna_struct_CreatePyObject(&iter.ptr);
found = true;
break;
}
}
RNA_property_collection_end(&iter);
if (found) {
return result;
}
}
mont29Unsubmitted
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Would add a comment here about why this is needed, and the fact that this may return an 'invalidated' PyObject in case the actual data memory is freed by the call to RNA_property_collection_end (with link back to the deg instance objects iterator code) ?
Same with the string subscript function below.

mont29: Would add a comment here about why this is needed, and the fact that this may return an…
const int len = RNA_property_collection_length(&self->ptr, self->prop); const int len = RNA_property_collection_length(&self->ptr, self->prop);
if (keynum_abs >= len) { if (keynum_abs >= len) {
PyErr_Format(PyExc_IndexError, PyErr_Format(PyExc_IndexError,
"bpy_prop_collection[index]: " "bpy_prop_collection[index]: "
"index %d out of range, size %d", "index %d out of range, size %d",
keynum, keynum,
len); len);
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} }
static PyObject *pyrna_prop_collection_subscript_str(BPy_PropertyRNA *self, const char *keyname) static PyObject *pyrna_prop_collection_subscript_str(BPy_PropertyRNA *self, const char *keyname)
{ {
PointerRNA newptr; PointerRNA newptr;
PYRNA_PROP_CHECK_OBJ(self); PYRNA_PROP_CHECK_OBJ(self);
if (RNA_property_collection_lookup_string_has_fn(self->prop)) {
if (RNA_property_collection_lookup_string(&self->ptr, self->prop, keyname, &newptr)) { if (RNA_property_collection_lookup_string(&self->ptr, self->prop, keyname, &newptr)) {
return pyrna_struct_CreatePyObject(&newptr); return pyrna_struct_CreatePyObject(&newptr);
} }
}
else {
/* No callback defined, just iterate and find the nth item. */
const int keylen = strlen(keyname);
char name[256];
int namelen;
PyObject *result = NULL;
bool found = false;
CollectionPropertyIterator iter;
RNA_property_collection_begin(&self->ptr, self->prop, &iter);
for (int i = 0; iter.valid; RNA_property_collection_next(&iter), i++) {
PropertyRNA *nameprop = RNA_struct_name_property(iter.ptr.type);
char *nameptr = RNA_property_string_get_alloc(
&iter.ptr, nameprop, name, sizeof(name), &namelen);
if ((keylen == namelen) && STREQ(nameptr, keyname)) {
found = true;
}
if ((char *)&name != nameptr) {
MEM_freeN(nameptr);
}
if (found) {
result = pyrna_struct_CreatePyObject(&iter.ptr);
break;
}
}
RNA_property_collection_end(&iter);
if (found) {
return result;
}
}
PyErr_Format(PyExc_KeyError, "bpy_prop_collection[key]: key \"%.200s\" not found", keyname); PyErr_Format(PyExc_KeyError, "bpy_prop_collection[key]: key \"%.200s\" not found", keyname);
return NULL; return NULL;
} }
// static PyObject *pyrna_prop_array_subscript_str(BPy_PropertyRNA *self, char *keyname) // static PyObject *pyrna_prop_array_subscript_str(BPy_PropertyRNA *self, char *keyname)
/** /**
* Special case: `bpy.data.objects["some_id_name", "//some_lib_name.blend"]` * Special case: `bpy.data.objects["some_id_name", "//some_lib_name.blend"]`
mont29Unsubmitted
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This could be de-duplicated with the same code above maybe? E.g. in a pyrna_prop_collection_subscript_end ?

mont29: This could be de-duplicated with the same code above maybe? E.g. in a…
campbellbartonAuthorUnsubmitted
Done
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Agree with the goal of de-duplicating boiler plate.
An issue with this is it moves Py_DECREF into a function, which can make reference counting a bit more difficult to follow.

if (found) {
  if (result && (pyrna_prop_collection_subscript_is_valid_or_error(result) == -1)) {
    Py_DECREF(result);
    result = NULL; /* The exception has been set. */
  }
  return result;
}

Could be replaced with:

if (found) {
  pyrna_prop_collection_subscript_is_valid_or_error_and_clear(&result);
  return result;
}
campbellbarton: Agree with the goal of de-duplicating boiler plate. An issue with this is it moves `Py_DECREF`…
mont29Unsubmitted
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Fair enough, can keep it like for now.

mont29: Fair enough, can keep it like for now.
* also for: `bpy.data.objects.get(("some_id_name", "//some_lib_name.blend"), fallback)` * also for: `bpy.data.objects.get(("some_id_name", "//some_lib_name.blend"), fallback)`
* *
* \note * \note
* error codes since this is not to be called directly from Python, * error codes since this is not to be called directly from Python,
* this matches Python's `__contains__` values C-API. * this matches Python's `__contains__` values C-API.
* - -1: exception set * - -1: exception set
* - 0: not found * - 0: not found
* - 1: found * - 1: found
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