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Copy pathObjectReader.py
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267 lines (223 loc) · 9.33 KB
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from ..enums import ClassIDType
from ..classes.Object import NodeHelper
from .. import classes
from ..streams import EndianBinaryReader, EndianBinaryWriter
from ..helpers import TypeTreeHelper
from ..helpers.Tpk import get_typetree_nodes_from_tpk
from ..exceptions import TypeTreeError, sanity_check, ReadingPastObject
from ..files import SerializedFile
from typing import Union
from .. import config
class ObjectReader:
byte_start: int
byte_size: int
type_id: int
class_id: int
type: ClassIDType
path_id: int
reader: EndianBinaryReader
# serialized_type: SerializedType
_last_read_pos: int
# saves where the parser stopped
# in case that not all data is read
# and the obj.data is changed, the unknown data can be added again
def __init__(self, assets_file: SerializedFile, reader: EndianBinaryReader):
self.assets_file = assets_file
self.reader = reader
self.data = b''
self.version = assets_file.version
self.version2 = assets_file.header.version
self.platform = assets_file.target_platform
self.build_type = assets_file.build_type
header = assets_file.header
stypes = assets_file.serialized_types
# AssetStudio ObjectInfo init
if assets_file.big_id_enabled:
self.path_id = reader.read_long()
elif header.version < 14:
self.path_id = reader.read_int()
else:
reader.align_stream()
self.path_id = reader.read_long()
if header.version >= 22:
self.byte_start_offset = (self.reader.real_offset(), 8)
self.byte_start = reader.read_long()
else:
self.byte_start_offset = (self.reader.real_offset(), 4)
self.byte_start = reader.read_u_int()
self.byte_start += header.data_offset
self.byte_header_offset = header.data_offset
self.byte_base_offset = self.reader.BaseOffset
self.byte_size_offset = (self.reader.real_offset(), 4)
self.byte_size = reader.read_u_int()
self.type_id = reader.read_int()
if header.version < 16:
self.class_id = reader.read_u_short()
self.serialized_type = None
for stype in stypes:
if stype.class_id == self.type_id:
self.serialized_type = stype
break
else:
stype = stypes[self.type_id]
self.serialized_type = stype
self.class_id = stype.class_id
self.type = ClassIDType(self.class_id)
if header.version < 11:
self.is_destroyed = reader.read_u_short()
if 11 <= header.version < 17:
script_type_index = reader.read_short()
if self.serialized_type:
self.serialized_type.script_type_index = script_type_index
if header.version == 15 or header.version == 16:
self.stripped = reader.read_byte()
def write(
self, header, writer: EndianBinaryWriter, data_writer: EndianBinaryWriter
):
if self.assets_file.big_id_enabled:
writer.write_long(self.path_id)
elif header.version < 14:
writer.write_int(self.path_id)
else:
writer.align_stream()
writer.write_long(self.path_id)
if self.data:
data = self.data
# in some cases the parser doesn't read all of the object data
# games might still require the missing data
# so following code appends the missing data back to edited objects
if self.type == ClassIDType.TextAsset:
end_pos = self.byte_start + self.byte_size
if self._last_read_pos and self._last_read_pos < end_pos:
self.reader.Position = self._last_read_pos
data += self.reader.read_bytes(end_pos - self._last_read_pos)
else:
self.reset()
data = self.reader.read(self.byte_size)
if header.version >= 22:
writer.write_long(data_writer.Position)
else:
writer.write_u_int(data_writer.Position)
writer.write_u_int(len(data))
data_writer.write(data)
writer.write_int(self.type_id)
if header.version < 16:
writer.write_u_short(self.class_id)
if header.version < 11:
writer.write_u_short(self.is_destroyed)
if 11 <= header.version < 17:
writer.write_short(self.serialized_type.script_type_index)
if header.version == 15 or header.version == 16:
writer.write_byte(self.stripped)
@property
def container(self):
return self.assets_file._container.path_dict.get(self.path_id)
@property
def Position(self) -> int:
return self.reader.Position
@Position.setter
def Position(self, value: int):
self.reader.Position = value
@property
def already_read(self) -> int:
return self.reader.Position - self.byte_start
def reset(self):
self.reader.Position = self.byte_start
def read(self, return_typetree_on_error=False, safe=True):
cls = getattr(classes, self.type.name, None)
obj = None
if cls:
if safe:
try:
obj = cls(self)
except Exception as e:
if return_typetree_on_error and config.ENABLE_TYPETREEHELPER_FALLBACK:
print_info(f"Error during the parsing of <{self.type.name} " +
f"path_id: {self.path_id}; asset_file: {self.assets_file.name}>")
print_debug(e)
print_info("Trying to return its TypeTree...")
else:
raise
else:
obj = cls(self)
if not obj and config.ENABLE_TYPETREEHELPER_FALLBACK:
obj = self.read_typetree(wrap=True)
self._last_read_pos = self.reader.Position
return obj
def get_raw_data(self) -> bytes:
"""Gets raw ObjectReader's data (from the storage)"""
pos = self.Position
self.reset()
ret = self.reader.read_bytes(self.byte_size)
self.Position = pos
return ret
def set_raw_data(self, data: Union[memoryview, bytes, EndianBinaryReader, "ObjectReader", EndianBinaryWriter]):
"""Sets raw ObjectReader's data (without writing it to the storage)"""
if isinstance(data, (ObjectReader, EndianBinaryReader, EndianBinaryWriter)):
self.data = data.save()
else:
self.data = data
self.mark_changed()
def mark_changed(self):
if self.assets_file:
self.assets_file.mark_changed()
def read_the_rest(self) -> bytes:
"""Returns the rest of the ObjectReader's bytes"""
if False and DEBUG and self.BaseOffset + self.Position - self.byte_start > self.byte_size:
raise ReadingPastObject(reader)
return self.read_bytes(self.byte_size - (self.Position - self.byte_start))
#raw_data = property(get_raw_data, set_raw_data) # don't really need it outside debugging
def get(self, key, default=None):
return getattr(self, key, default)
def __getattr__(self, name: str):
if hasattr(self.reader, name):
return getattr(self.reader, name)
elif name.startswith("m_"):
non_m = name[2:].lower()
if hasattr(self.reader, non_m):
return getattr(self.reader, non_m)
else:
return None
raise AttributeError(f"{self.__class__.__name__} has not attribute {name}")
def __repr__(self):
return "<%s %s>" % (self.__class__.__name__, self.type.name)
###################################################
#
# Typetree Stuff
#
###################################################
def dump_typetree(self, nodes: list = None) -> str:
self.reset()
sb = []
nodes = self.get_typetree(nodes)
TypeTreeHelper.read_typetree_str(sb, nodes, self)
return "".join(sb)
def dump_typetree_structure(self) -> str:
return TypeTreeHelper.dump_typetree(self.get_typetree_nodes())
def get_typetree_nodes(self, nodes: list = None) -> list:
if nodes:
return nodes
if self.serialized_type:
nodes = self.serialized_type.nodes
if not nodes:
nodes = get_typetree_nodes_from_tpk(self.class_id, self.version)
if not nodes:
raise TypeTreeError("There are no TypeTree nodes for this object.")
return nodes
def read_typetree(self, nodes: list = None, wrap: bool = False, all_trees=None) -> dict:
nodes = self.get_typetree_nodes(nodes)
if not all_trees:
all_trees = self.assets_file.get_all_typetrees()
self.reset()
res = TypeTreeHelper.read_typetree(nodes, self, all_trees=all_trees)
return NodeHelper(res, self.assets_file) if wrap else res
def save_typetree(
self, tree: dict, nodes: list = None, writer: EndianBinaryWriter = None, all_trees:dict = None
):
nodes = self.get_typetree_nodes(nodes)
if not writer:
writer = EndianBinaryWriter(endian=self.reader.endian)
writer = TypeTreeHelper.write_typetree(tree, nodes, writer, all_trees)
data = writer.save()
self.set_raw_data(data)
return data