#include <algorithm>

#include <cstdint>

#include <map>

#include <type_traits>

#include <string>

#include <regex>

#include "swap.hpp"

#include "TypeTreeHelper.hpp"

typedef struct Reader

} ReaderT;

typedef struct TypeTreeReaderConfig

} TypeTreeReaderConfigT;

std::string clean_name(const std::string &name)

}

inline void align4(ReaderT *reader)

}

inline PyObject *read_bool(ReaderT *reader)

{

if (reader->ptr + 1 > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_bool out of bounds");

return NULL;

}

PyObject *value = *reader->ptr++ ? Py_True : Py_False;

Py_INCREF(value);

return value;

}

inline PyObject *read_bool_array(ReaderT *reader, int32_t count)

{

if (reader->ptr + count > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_bool out of bounds");

return NULL;

}

PyObject *list = PyList_New(count);

for (auto i = 0; i < count; i++)

{

PyObject *value = *reader->ptr++ ? Py_True : Py_False;

Py_INCREF(value);

PyList_SET_ITEM(list, i, value);

}

return list;

}

inline PyObject *read_u8(ReaderT *reader)

{

if (reader->ptr + 1 > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_u8 out of bounds");

return NULL;

}

return PyLong_FromUnsignedLong(*reader->ptr++);

}

inline PyObject *read_u8_array(ReaderT *reader, int32_t count)

{

if (reader->ptr + count > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_u8 out of bounds");

return NULL;

}

PyObject *list = PyList_New(count);

for (auto i = 0; i < count; i++)

{

PyList_SET_ITEM(list, i, PyLong_FromUnsignedLong(*reader->ptr++));

}

return list;

}

inline PyObject *read_s8(ReaderT *reader)

{

if (reader->ptr + 1 > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_s8 out of bounds");

return NULL;

}

return PyLong_FromLong((int8_t)*reader->ptr++);

}

inline PyObject *read_s8_array(ReaderT *reader, int32_t count)

{

if (reader->ptr + count > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_s8 out of bounds");

return NULL;

}

PyObject *list = PyList_New(count);

int8_t *ptr = (int8_t *)reader->ptr;

for (auto i = 0; i < count; i++)

{

PyList_SET_ITEM(list, i, PyLong_FromLong(*ptr++));

}

reader->ptr = (uint8_t *)ptr;

return list;

}

template <typename T, bool swap>

inline PyObject *read_num(ReaderT *reader)

{

static_assert(std::is_integral<T>::value || std::is_floating_point<T>::value, "Unsupported type for read_num");

if (reader->ptr + sizeof(T) > reader->end)

{

return PyErr_Format(PyExc_ValueError, "read_%s out of bounds", typeid(T).name());

}

T value = *(T *)reader->ptr;

if constexpr (swap)

{

swap_any_inplace(&value);

}

reader->ptr += sizeof(T);

if constexpr (std::is_floating_point<T>::value)

{

return PyFloat_FromDouble(value);

}

else if constexpr (std::is_signed<T>::value)

{

if constexpr (std::is_same<T, int64_t>::value)

{

return PyLong_FromLongLong(value);

}

else

{

return PyLong_FromLong((int32_t)value);

}

}

else if constexpr (std::is_unsigned<T>::value)

{

if constexpr (std::is_same<T, uint64_t>::value)

{

return PyLong_FromUnsignedLongLong(value);

}

else

{

return PyLong_FromUnsignedLong((uint32_t)value);

}

}

else

{

return PyErr_Format(PyExc_TypeError, "Unsupported type for read_num: %s", typeid(T).name());

}

}

template <typename T, bool swap>

inline PyObject *read_num_array(ReaderT *reader, int32_t count)

{

static_assert(std::is_integral<T>::value || std::is_floating_point<T>::value, "Unsupported type for read_num_array");

if (reader->ptr + sizeof(T) * count > reader->end)

{

return PyErr_Format(PyExc_ValueError, "read_%s_array out of bounds", typeid(T).name());

}

PyObject *list = PyList_New(count);

T *ptr = (T *)reader->ptr;

for (auto i = 0; i < count; i++)

{

T value = *ptr++;

if constexpr (swap)

{

swap_any_inplace(&value);

}

PyObject *item;

if constexpr (std::is_floating_point<T>::value)

{

item = PyFloat_FromDouble(value);

}

else if constexpr (std::is_signed<T>::value)

{

if constexpr (std::is_same<T, int64_t>::value)

{

item = PyLong_FromLongLong(value);

}

else

{

item = PyLong_FromLong((int32_t)value);

}

}

else if constexpr (std::is_unsigned<T>::value)

{

if constexpr (std::is_same<T, uint64_t>::value)

{

item = PyLong_FromUnsignedLongLong(value);

}

else

{

item = PyLong_FromUnsignedLong((uint32_t)value);

}

}

else

{

Py_DECREF(list);

return PyErr_Format(PyExc_TypeError, "Unsupported type for read_num_array: %s", typeid(T).name());

}

PyList_SET_ITEM(list, i, item);

}

reader->ptr = (uint8_t *)ptr;

return list;

}

template <bool swap>

inline bool _read_length(ReaderT *reader, int32_t *length)

}

template <bool swap>

inline PyObject *read_str(ReaderT *reader)

{

int32_t length;

if (!_read_length<swap>(reader, &length))

{

return NULL;

}

if (reader->ptr + length > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_str out of bounds");

return NULL;

}

PyObject *py_str = PyUnicode_DecodeUTF8((char *)reader->ptr, length, "surrogateescape");

reader->ptr += length;

align4(reader);

return py_str;

}

template <bool swap>

inline PyObject *read_bytes(ReaderT *reader)

{

int32_t length;

if (!_read_length<swap>(reader, &length))

{

return NULL;

}

if (reader->ptr + length > reader->end)

{

PyErr_SetString(PyExc_ValueError, "read_bytes out of bounds");

return NULL;

}

PyObject *bytes = PyBytes_FromStringAndSize((char *)reader->ptr, length);

reader->ptr += length;

return bytes;

}

template <bool swap>

inline PyObject *read_pair(ReaderT *reader, TypeTreeNodeObject *node, TypeTreeReaderConfigT *config)

{

if (PyList_GET_SIZE(node->m_Children) != 2)

{

PyErr_SetString(PyExc_ValueError, "Pair node must have 2 children");

return NULL;

}

PyObject *first = read_typetree_value<swap>(reader, (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, 0), config);

if (first == NULL)

{

return NULL;

}

PyObject *second = read_typetree_value<swap>(reader, (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, 1), config);

if (second == NULL)

{

Py_DECREF(first);

return NULL;

}

// PyTuple_Pack creates two strong references

PyObject *pair = PyTuple_Pack(2, first, second);

// so we need to decref both values here to bring their ref count back to 1

Py_DECREF(first);

Py_DECREF(second);

return pair;

}

template <bool swap>

inline PyObject *read_pair_array(ReaderT *reader, TypeTreeNodeObject *node, TypeTreeReaderConfigT *config, int32_t count)

{

if (PyList_GET_SIZE(node->m_Children) != 2)

{

PyErr_SetString(PyExc_ValueError, "Pair node must have 2 children");

return NULL;

}

TypeTreeNodeObject *first_child = (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, 0);

TypeTreeNodeObject *second_child = (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, 1);

PyObject *list = PyList_New(count);

for (auto i = 0; i < count; i++)

{

PyObject *first = read_typetree_value<swap>(reader, first_child, config);

if (first == NULL)

{

Py_DECREF(list);

return NULL;

}

PyObject *second = read_typetree_value<swap>(reader, second_child, config);

if (second == NULL)

{

Py_DECREF(first);

Py_DECREF(list);

return NULL;

}

PyList_SET_ITEM(list, i, PyTuple_Pack(2, first, second)); // pack creates two strong references

// so we need to decref both values here to bring their ref count back to 1

Py_DECREF(first);

Py_DECREF(second);

}

return list;

}

template <bool swap, bool as_dict>

inline PyObject *read_class(ReaderT *reader, TypeTreeNodeObject *node, TypeTreeReaderConfigT *config)

{

bool changed_registry = false;

PyObject *value = PyDict_New(); // value: 1 refcount

for (int i = 0; i < PyList_GET_SIZE(node->m_Children); i++)

{

TypeTreeNodeObject *child = (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, i); // no refcount change

if (child->_data_type == NodeDataType::ManagedReferencesRegistry)

{

if (config->has_registry)

{

continue;

}

else

{

changed_registry = true;

config->has_registry = true;

}

}

PyObject *child_value = read_typetree_value<swap>(reader, child, config); // child_value: 1 refcount

if (child_value == NULL)

{

Py_DECREF(value); // value: 0 refcount

return NULL;

}

int set_item_result;

if constexpr (as_dict == true)

{

set_item_result = PyDict_SetItem(value, child->m_Name, child_value); // child_value: 2 refcount

}

else

{

set_item_result = PyDict_SetItem(value, child->_clean_name, child_value); // child_value: 2 refcount

}

if (set_item_result != 0)

{

Py_DECREF(value); // value: 0 refcount

Py_DECREF(child_value); // child_value: 0 refcount

return NULL;

}

// PyDict_SetItem increases ref count, so we need to decref here

Py_DECREF(child_value); // child_value: 1 refcount

}

if (changed_registry)

{

config->has_registry = false;

}

return value;

}

static PyObject *_get_annotations = nullptr;

inline PyObject *get_annotations(PyObject *clz)

{

#if PY_VERSION_HEX >= 0x030e0000

return PyObject_CallFunctionObjArgs(_get_annotations, clz, NULL);

#else

return PyObject_GetAttrString(clz, "__annotations__");

#endif

}

inline PyObject *parse_class(PyObject *kwargs, TypeTreeNodeObject *node, TypeTreeReaderConfigT *config)

{

PyObject *instance = nullptr;

PyObject *clz = nullptr;

PyObject *args = PyTuple_New(0);

PyObject *annotations = nullptr;

PyObject *extras = nullptr;

// dict iterator values

PyObject *key, *value = nullptr;

Py_ssize_t pos;

// slots check

PyObject *slots = nullptr;

if (kwargs == NULL)

{

return NULL;

}

if (node->_data_type == NodeDataType::PPtr)

{

clz = PyObject_GetAttrString(config->classes, "PPtr");

if (clz == nullptr)

{

PyErr_SetString(PyExc_ValueError, "Failed to get PPtr class");

goto PARSE_CLASS_CLEANUP;

}

PyDict_SetItemString(kwargs, "assetsfile", config->assetfile);

}

else

{

clz = PyObject_GetAttr(config->classes, node->m_Type);

if (clz == nullptr)

{

clz = PyObject_GetAttrString(config->classes, "UnknownObject");

if (clz == nullptr)

{

PyErr_SetString(PyExc_ValueError, "Failed to get UnknownObject class");

goto PARSE_CLASS_CLEANUP;

}

PyDict_SetItemString(kwargs, "__node__", (PyObject *)node);

}

}

instance = PyObject_Call(clz, args, kwargs);

if (instance != nullptr)

{

goto PARSE_CLASS_CLEANUP;

}

PyErr_Clear();

// if __slots__ is defined, setattr for non-slots attributes will fail

// so we can skip the extra field check

slots = PyObject_GetAttrString(clz, "__slots__");

if (PyTuple_Check(slots) && PyTuple_GET_SIZE(slots) > 0)

{

Py_XDECREF(slots);

goto PARSE_CLASS_UNKNOWN;

}

Py_XDECREF(slots);

// possibly extra fields

annotations = get_annotations(clz);

if (annotations == nullptr)

{

PyErr_SetString(PyExc_ValueError, "Failed to get annotations");

goto PARSE_CLASS_CLEANUP;

}

extras = PyDict_New();

for (int i = 0; i < PyList_GET_SIZE(node->m_Children); i++)

{

TypeTreeNodeObject *child = (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, i); // - borrowed ref +/- 0

if (PyDict_Contains(annotations, child->_clean_name) == 1)

{

continue;

}

PyObject *extra_value = PyDict_GetItem(kwargs, child->_clean_name); // - borrowed ref +/- 0

PyDict_SetItem(extras, child->_clean_name, extra_value); // +1

PyDict_DelItem(kwargs, child->_clean_name); // -1

}

if (PyDict_Size(extras) == 0)

{

goto PARSE_CLASS_UNKNOWN;

}

instance = PyObject_Call(clz, args, kwargs);

if (instance != nullptr)

{

pos = 0;

while (PyDict_Next(extras, &pos, &key, &value))

{

if (PyObject_GenericSetAttr(instance, key, value) != 0)

{

Py_DECREF(instance);

goto PARSE_CLASS_UNKNOWN;

}

}

}

else

{

PARSE_CLASS_UNKNOWN:

PyErr_Clear();

// if we still failed to create an instance, fallback to UnknownObject

Py_DECREF(clz);

clz = PyObject_GetAttrString(config->classes, "UnknownObject");

PyDict_SetItemString(kwargs, "__node__", (PyObject *)node);

// merge extras back into kwargs

if (extras != nullptr)

{

pos = 0;

while (PyDict_Next(extras, &pos, &key, &value))

{

PyDict_SetItem(kwargs, key, value);

}

}

instance = PyObject_Call(clz, args, kwargs);

}

PARSE_CLASS_CLEANUP:

Py_DECREF(args);

Py_DECREF(kwargs);

Py_XDECREF(clz);

Py_XDECREF(annotations);

Py_XDECREF(extras);

return instance;

}

TypeTreeNodeObject *get_ref_type_node(PyObject *ref_object, PyObject *assetsfile)

{

if (assetsfile == Py_None)

{

PyErr_SetString(PyExc_ValueError, "Reference Type found but no SerializedFile passed as assetsfile to read_typetree!");

return NULL;

}

PyObject *ref_types = PyObject_GetAttrString(assetsfile, "ref_types");

if (!ref_types || !PyList_Check(ref_types))

{

Py_XDECREF(ref_types);

PyErr_SetString(PyExc_ValueError, "No SerializedFile.ref_types");

return NULL;

}

PyObject *type = PyDict_GetItemString(ref_object, "type");

if (!type)

{

Py_DECREF(ref_types);

PyErr_SetString(PyExc_ValueError, "Failed to get 'type'");

return NULL;

}

PyObject *cls = NULL;

PyObject *ns = NULL;

PyObject *asm_ = NULL;

if (PyDict_Check(type))

{

cls = PyDict_GetItemString(type, "class");

ns = PyDict_GetItemString(type, "ns");

asm_ = PyDict_GetItemString(type, "asm");

Py_XINCREF(cls);

Py_XINCREF(ns);

Py_XINCREF(asm_);

}

else

{

cls = PyObject_GetAttrString(type, "class");

ns = PyObject_GetAttrString(type, "ns");

asm_ = PyObject_GetAttrString(type, "asm");

}

if (!cls || !ns || !asm_)

{

Py_DECREF(ref_types);

Py_XDECREF(cls);

Py_XDECREF(ns);

Py_XDECREF(asm_);

PyErr_SetString(PyExc_ValueError, "Failed to get 'class', 'ns' or 'asm'");

return NULL;

}

if (PyUnicode_GET_LENGTH(cls) == 0)

{

Py_DECREF(ref_types);

Py_DECREF(cls);

Py_DECREF(ns);

Py_DECREF(asm_);

return (TypeTreeNodeObject *)Py_None;

}

Py_ssize_t ref_types_len = PyList_Size(ref_types);

TypeTreeNodeObject *ref_type_node = NULL;

for (Py_ssize_t i = 0; i < ref_types_len; i++)

{

PyObject *ref_type = PyList_GetItem(ref_types, i);

PyObject *m_ClassName = PyObject_GetAttrString(ref_type, "m_ClassName");

PyObject *m_NameSpace = PyObject_GetAttrString(ref_type, "m_NameSpace");

PyObject *m_AssemblyName = PyObject_GetAttrString(ref_type, "m_AssemblyName");

if (!m_ClassName || !m_NameSpace || !m_AssemblyName)

{

Py_XDECREF(m_ClassName);

Py_XDECREF(m_NameSpace);

Py_XDECREF(m_AssemblyName);

PyErr_SetString(PyExc_ValueError, "Failed to get 'm_ClassName', 'm_NameSpace' or 'm_AssemblyName'");

break;

}

bool compare_cls = (PyUnicode_Compare(cls, m_ClassName) == 0) && (PyUnicode_Compare(ns, m_NameSpace) == 0) && (PyUnicode_Compare(asm_, m_AssemblyName) == 0);

Py_DECREF(m_ClassName);

Py_DECREF(m_NameSpace);

Py_DECREF(m_AssemblyName);

if (compare_cls)

{

ref_type_node = (TypeTreeNodeObject *)PyObject_GetAttrString(ref_type, "node");

break;

}

}

Py_DECREF(ref_types);

Py_XDECREF(cls);

Py_XDECREF(ns);

Py_XDECREF(asm_);

return ref_type_node;

}

template <bool swap>

PyObject *read_typetree_value_array(ReaderT *reader, TypeTreeNodeObject *node, TypeTreeReaderConfigT *config, uint32_t size);

const NodeDataType SUPPORTED_VALUE_ARRAY_READ_TYPES[] = {

NodeDataType::u8,

NodeDataType::u16,

NodeDataType::u32,

NodeDataType::u64,

NodeDataType::s8,

NodeDataType::s16,

NodeDataType::s32,

NodeDataType::s64,

NodeDataType::f32,

NodeDataType::f64,

NodeDataType::boolean,

NodeDataType::pair,

};

template <bool swap>

PyObject *read_typetree_value(ReaderT *reader, TypeTreeNodeObject *node, TypeTreeReaderConfigT *config)

{

bool align = node->_align;

PyObject *value = nullptr;

switch (node->_data_type)

{

case NodeDataType::u8:

value = read_u8(reader);

break;

case NodeDataType::u16:

value = read_num<uint16_t, swap>(reader);

break;

case NodeDataType::u32:

value = read_num<uint32_t, swap>(reader);

break;

case NodeDataType::u64:

value = read_num<uint64_t, swap>(reader);

break;

case NodeDataType::s8:

value = read_s8(reader);

break;

case NodeDataType::s16:

value = read_num<int16_t, swap>(reader);

break;

case NodeDataType::s32:

value = read_num<int32_t, swap>(reader);

break;

case NodeDataType::s64:

value = read_num<int64_t, swap>(reader);

break;

case NodeDataType::f32:

value = read_num<float, swap>(reader);

break;

case NodeDataType::f64:

value = read_num<double, swap>(reader);

break;

case NodeDataType::boolean:

value = read_bool(reader);

break;

case NodeDataType::str:

value = read_str<swap>(reader);

break;

case NodeDataType::bytes:

value = read_bytes<swap>(reader);

break;

case NodeDataType::pair:

value = read_pair<swap>(reader, node, config);

break;

case NodeDataType::ReferencedObject:

{

value = PyDict_New();

PyObject *child_value;

for (int i = 0; i < PyList_GET_SIZE(node->m_Children); i++)

{

TypeTreeNodeObject *child = (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, i);

if (child->_data_type == NodeDataType::ReferencedObjectData)

{

TypeTreeNodeObject *ref_node = get_ref_type_node(value, config->assetfile);

if (!ref_node)

{

PyErr_SetString(PyExc_ValueError, "Failed to get ref type node");

Py_DECREF(value);

return NULL;

}

else if (ref_node == (TypeTreeNodeObject *)Py_None)

{

Py_DECREF(ref_node);

continue;

}

child_value = read_typetree_value<swap>(reader, ref_node, config);

Py_DECREF(ref_node);

}

else

{

child_value = read_typetree_value<swap>(reader, child, config);

}

if (child_value == NULL)

{

Py_DECREF(value);

return NULL;

}

if (PyDict_SetItem(value, child->m_Name, child_value))

{

Py_DECREF(value);

Py_DECREF(child_value);

return NULL;

}

// dict increases ref count, so we need to decref here

Py_DECREF(child_value);

}

if (!config->as_dict)

{

PyObject *clz = PyObject_GetAttrString(config->classes, "UnknownObject");

if (clz == NULL)

{

PyErr_SetString(PyExc_ValueError, "Failed to get class");

Py_DECREF(value);

return NULL;

}

PyObject *args = PyTuple_Pack(1, (PyObject *)node);

PyObject *instance = PyObject_Call(clz, args, value);

Py_DECREF(clz);

Py_DECREF(args);

Py_DECREF(value);

value = instance;

}

break;

}

default:

TypeTreeNodeObject *child = nullptr;

if (PyList_GET_SIZE(node->m_Children) > 0)

{

child = (TypeTreeNodeObject *)PyList_GET_ITEM(node->m_Children, 0);

}

if (child && child->_data_type == NodeDataType::Array)

{

// array

if (PyList_GET_SIZE(child->m_Children) != 2)

{

PyErr_SetString(PyExc_ValueError, "Array node must have 2 children");

return NULL;

}

if (child->_align)

{

align = true;

}

int32_t length;

if (!_read_length<swap>(reader, &length))

{

return NULL;

}

child = (TypeTreeNodeObject *)PyList_GET_ITEM(child->m_Children, 1);

if (std::find(std::begin(SUPPORTED_VALUE_ARRAY_READ_TYPES), std::end(SUPPORTED_VALUE_ARRAY_READ_TYPES), child->_data_type) == std::end(SUPPORTED_VALUE_ARRAY_READ_TYPES))

{

value = PyList_New(length);

for (int i = 0; i < length; i++)

{

PyObject *item = read_typetree_value<swap>(reader, child, config);

if (item == NULL)

{

Py_DECREF(value);

return NULL;

}

PyList_SET_ITEM(value, i, item);

}

}

else

{

value = read_typetree_value_array<swap>(reader, child, config, length);

}

}

else

{

// class

if (config->as_dict)

{

value = read_class<swap, true>(reader, node, config);

}

else

{

value = read_class<swap, false>(reader, node, config);

value = parse_class(value, node, config);

}

}

}

if (align && value != NULL)

{

align4(reader);

}

return value;

}

template <bool swap>

PyObject *read_typetree_value_array(ReaderT *reader, TypeTreeNodeObject *node, TypeTreeReaderConfigT *config, int32_t count)

{

bool align = node->_align;

PyObject *value = nullptr;

switch (node->_data_type)

{

case NodeDataType::u8:

value = read_u8_array(reader, count);

break;

case NodeDataType::u16:

value = read_num_array<uint16_t, swap>(reader, count);

break;

case NodeDataType::u32:

value = read_num_array<uint32_t, swap>(reader, count);

break;

case NodeDataType::u64:

value = read_num_array<uint64_t, swap>(reader, count);

break;

case NodeDataType::s8:

value = read_s8_array(reader, count);

break;

case NodeDataType::s16:

value = read_num_array<int16_t, swap>(reader, count);

break;

case NodeDataType::s32:

value = read_num_array<int32_t, swap>(reader, count);

break;

case NodeDataType::s64:

value = read_num_array<int64_t, swap>(reader, count);

break;

case NodeDataType::f32:

value = read_num_array<float, swap>(reader, count);

break;

case NodeDataType::f64:

value = read_num_array<double, swap>(reader, count);

break;

case NodeDataType::boolean:

value = read_bool_array(reader, count);

break;

case NodeDataType::pair:

value = read_pair_array<swap>(reader, node, config, count);

break;

default:

value = PyErr_Format(PyExc_ValueError, "Unsupported type for read_typetree_value_array: %d", node->_data_type);

}

if (align && value != NULL)

{

align4(reader);

}

return value;

}

static inline void set_none_if_null_n_incref(PyObject **field)

}

static bool is_null_none_or_type(PyObject *obj, PyTypeObject *type, const char *type_name, const char *field_name)

}

PyObject *read_typetree(PyObject *self, PyObject *args, PyObject *kwargs)

{

const char *kwlist[] = {"data", "node", "endian", "as_dict", "assetsfile", "classes", NULL};

Py_buffer view;

PyObject *node = nullptr;

int as_dict = 1;

PyObject *value = nullptr;

Py_ssize_t bytes_read = 0;

ReaderT reader;

volatile uint16_t bint = 0x0100;

volatile bool is_big_endian = ((uint8_t *)&bint)[0] == 1;

TypeTreeReaderConfigT config = {

false,

nullptr,

nullptr,

false,

};

char endian;

bool swap;

if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y*OC|pOO", (char **)kwlist, &view, &node, &endian, &as_dict, &config.assetfile, &config.classes))

{

goto READ_TYPETREE_CLEANUP;

}

set_none_if_null_n_incref(&config.assetfile);

set_none_if_null_n_incref(&config.classes);

config.as_dict = as_dict == 1;

if (!config.as_dict)

{

if (config.classes == Py_None)

{

PyErr_SetString(PyExc_ValueError, "classes must be set if not as dict");

goto READ_TYPETREE_CLEANUP;

}

}

switch (endian)

{

case '<':

if (is_big_endian)

{

swap = true;

}

else

{

swap = false;

}

break;

case '>':

if (is_big_endian)

{

swap = false;

}