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Copy pathEndianBinaryReader.py
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573 lines (447 loc) · 17.3 KB
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import sys
from struct import Struct, unpack
import re
from typing import List, Union
from io import BytesIO, BufferedIOBase, IOBase, BufferedReader
reNot0 = re.compile(b"(.*?)\x00", re.S)
SYS_ENDIAN = "<" if sys.byteorder == "little" else ">"
from ..math import Color, Matrix4x4, Quaternion, Vector2, Vector3, Vector4, Rectangle
# generate unpack and unpack_from functions
TYPE_PARAM_SIZE_LIST = [
("short", "h", 2),
("u_short", "H", 2),
("int", "i", 4),
("u_int", "I", 4),
("long", "q", 8),
("u_long", "Q", 8),
("half", "e", 2),
("float", "f", 4),
("double", "d", 8),
("vector2", "2f", 8),
("vector3", "3f", 12),
("vector4", "4f", 16),
]
LOCALS = locals()
for endian_s, endian_l in (("<", "little"), (">", "big")):
for typ, param, _ in TYPE_PARAM_SIZE_LIST:
LOCALS[f"unpack_{endian_l}_{typ}"] = Struct(f"{endian_s}{param}").unpack
LOCALS[f"unpack_{endian_l}_{typ}_from"] = Struct(
f"{endian_s}{param}"
).unpack_from
class EndianBinaryReader:
endian: str
Length: int
Position: int
BaseOffset: int
def __new__(
cls,
item: Union[bytes, bytearray, memoryview, BytesIO, str],
endian: str = ">",
offset: int = 0,
):
if isinstance(item, (bytes, bytearray, memoryview)):
obj = super(EndianBinaryReader, cls).__new__(EndianBinaryReader_Memoryview)
elif isinstance(item, (IOBase, BufferedIOBase)):
obj = super(EndianBinaryReader, cls).__new__(EndianBinaryReader_Streamable)
elif isinstance(item, str):
item = open(item, "rb")
obj = super(EndianBinaryReader, cls).__new__(EndianBinaryReader_Streamable)
elif isinstance(item, EndianBinaryReader):
item = (
item.stream
if isinstance(item, EndianBinaryReader_Streamable)
else item.view
)
return EndianBinaryReader(item, endian, offset)
elif hasattr(item, "read"):
if hasattr(item, "seek") and hasattr(item, "tell"):
obj = super(EndianBinaryReader, cls).__new__(
EndianBinaryReader_Streamable
)
else:
item = item.read()
obj = super(EndianBinaryReader, cls).__new__(
EndianBinaryReader_Memoryview
)
obj.__init__(item, endian)
return obj
def __init__(self, item, endian=">", offset=0):
self.endian = endian
self.BaseOffset = offset
self.Position = 0
@property
def bytes(self):
# implemented by Streamable and Memoryview versions
return b""
def read(self, *args):
# implemented by Streamable and Memoryview versions
return b""
def read_byte(self) -> int:
return unpack(self.endian + "b", self.read(1))[0]
def read_u_byte(self) -> int:
return unpack(self.endian + "B", self.read(1))[0]
def read_bytes(self, num) -> bytes:
return self.read(num)
def read_short(self) -> int:
return unpack(self.endian + "h", self.read(2))[0]
def read_int(self) -> int:
return unpack(self.endian + "i", self.read(4))[0]
def read_long(self) -> int:
return unpack(self.endian + "q", self.read(8))[0]
def read_u_short(self) -> int:
return unpack(self.endian + "H", self.read(2))[0]
def read_u_int(self) -> int:
return unpack(self.endian + "I", self.read(4))[0]
def read_u_long(self) -> int:
return unpack(self.endian + "Q", self.read(8))[0]
def read_float(self) -> float:
return unpack(self.endian + "f", self.read(4))[0]
def read_double(self) -> float:
return unpack(self.endian + "d", self.read(8))[0]
def read_boolean(self) -> bool:
return bool(unpack(self.endian + "?", self.read(1))[0])
def read_string(self, size=None, encoding="utf8") -> str:
if size is None:
ret = self.read_string_to_null()
else:
ret = unpack(f"{self.endian}{size}is", self.read(size))[0]
try:
return ret.decode(encoding)
except UnicodeDecodeError:
return ret
def read_string_to_null(self, max_length=32767) -> str:
ret = []
c = b""
while c != b"\0" and len(ret) < max_length and self.Position != self.Length:
ret.append(c)
c = self.read(1)
if not c:
raise ValueError("Unterminated string: %r" % ret)
return b"".join(ret).decode("utf8", "surrogateescape")
def read_aligned_string(self) -> str:
length = self.read_int()
if 0 < length <= self.Length - self.Position:
string_data = bytes(self.read_bytes(length))
result = string_data.decode("utf8", "surrogateescape")
self.align_stream()
return result
return ""
def align_stream(self, alignment=4):
self.Position += (alignment - self.Position % alignment) % alignment
def read_quaternion(self) -> Quaternion:
return Quaternion(
self.read_float(), self.read_float(), self.read_float(), self.read_float()
)
def read_vector2(self) -> Vector2:
return Vector2(self.read_float(), self.read_float())
def read_vector3(self) -> Vector3:
return Vector3(self.read_float(), self.read_float(), self.read_float())
def read_vector4(self) -> Vector4:
return Vector4(
self.read_float(), self.read_float(), self.read_float(), self.read_float()
)
def read_rectangle_f(self) -> Rectangle:
return Rectangle(
self.read_float(), self.read_float(), self.read_float(), self.read_float()
)
def read_color_uint(self):
r = self.read_u_byte()
g = self.read_u_byte()
b = self.read_u_byte()
a = self.read_u_byte()
return Color(r / 255.0, g / 255.0, b / 255.0, a / 255.0)
def read_color4(self) -> Color:
return Color(
self.read_float(), self.read_float(), self.read_float(), self.read_float()
)
def read_byte_array(self) -> bytes:
return self.read(self.read_int())
def read_matrix(self) -> Matrix4x4:
return Matrix4x4(self.read_float_array(16))
def read_array(self, command, length: int) -> list:
return [command() for _ in range(length)]
def read_array_struct(self, param: str, length: int = None) -> list:
if length is None:
length = self.read_int()
struct = Struct(f"{self.endian}{length}{param}")
return struct.unpack(self.read(struct.size))
def read_boolean_array(self, length: int = None) -> List[bool]:
return self.read_array_struct("?", length)
def read_u_short_array(self, length: int = None) -> List[int]:
return self.read_array_struct("h", length)
def read_short_array(self, length: int = None) -> List[int]:
return self.read_array_struct("H", length)
def read_int_array(self, length: int = None) -> List[int]:
return self.read_array_struct("i", length)
def read_u_int_array(self, length: int = None) -> List[int]:
return self.read_array_struct("I", length)
def read_u_int_array_array(self, length: int = None) -> List[List[int]]:
return self.read_array(
self.read_u_int_array, length if length is not None else self.read_int()
)
def read_float_array(self, length: int = None) -> List[float]:
return self.read_array_struct("f", length)
def read_string_array(self) -> List[str]:
return self.read_array(self.read_aligned_string, self.read_int())
def read_vector2_array(self) -> List[Vector2]:
return self.read_array(self.read_vector2, self.read_int())
def read_vector4_array(self) -> List[Vector4]:
return self.read_array(self.read_vector4, self.read_int())
def read_matrix_array(self) -> List[Matrix4x4]:
return self.read_array(self.read_matrix, self.read_int())
def real_offset(self) -> int:
"""Returns offset in the underlying file.
(Not working with unpacked streams.)
"""
return self.BaseOffset + self.Position
def read_the_rest(self, obj_start: int, obj_size: int) -> bytes:
"""Returns the rest of the current reader bytes."""
return self.read_bytes(obj_size - (self.Position - obj_start))
class EndianBinaryReader_Memoryview(EndianBinaryReader):
__slots__ = ("view", "_endian", "BaseOffset", "Position", "Length")
view: memoryview
def __init__(self, view, endian=">", offset=0):
self._endian = ""
super().__init__(view, endian=endian, offset=offset)
self.view = memoryview(view)
self.Length = len(view)
@property
def endian(self):
return self._endian
@endian.setter
def endian(self, value: str):
if value not in ("<", ">"):
raise ValueError("Invalid endian")
if value != self._endian:
setattr(
self,
"__class__",
EndianBinaryReader_Memoryview_LittleEndian
if value == "<"
else EndianBinaryReader_Memoryview_BigEndian,
)
self._endian = value
@property
def bytes(self):
return self.view
def dispose(self):
self.view.release()
def read(self, length: int):
if not length:
return b""
ret = self.view[self.Position : self.Position + length]
self.Position += length
return ret
def read_aligned_string(self):
length = self.read_int()
if 0 < length <= self.Length - self.Position:
string_data = self.read_bytes(length)
result = bytes(string_data).decode("utf8", "surrogateescape")
self.align_stream()
return result
return ""
def read_string_to_null(self, max_length=32767) -> str:
match = reNot0.search(self.view, self.Position, self.Position + max_length)
if not match:
if self.Position + max_length >= self.Length:
raise Exception("String not terminated")
else:
return bytes(self.read_bytes(max_length)).decode(
"utf8", "surrogateescape"
)
ret = match[1].decode("utf8", "surrogateescape")
self.Position = match.end()
return ret
class EndianBinaryReader_Memoryview_LittleEndian(EndianBinaryReader_Memoryview):
def read_u_short(self):
(ret,) = unpack_little_u_short_from(self.view, self.Position)
self.Position += 2
return ret
def read_short(self):
(ret,) = unpack_little_short_from(self.view, self.Position)
self.Position += 2
return ret
def read_int(self):
(ret,) = unpack_little_int_from(self.view, self.Position)
self.Position += 4
return ret
def read_u_int(self):
(ret,) = unpack_little_u_int_from(self.view, self.Position)
self.Position += 4
return ret
def read_long(self):
(ret,) = unpack_little_long_from(self.view, self.Position)
self.Position += 8
return ret
def read_u_long(self):
(ret,) = unpack_little_u_long_from(self.view, self.Position)
self.Position += 8
return ret
def read_half(self):
(ret,) = unpack_little_half_from(self.view, self.Position)
self.Position += 2
return ret
def read_float(self):
(ret,) = unpack_little_float_from(self.view, self.Position)
self.Position += 4
return ret
def read_double(self):
(ret,) = unpack_little_double_from(self.view, self.Position)
self.Position += 8
return ret
def read_vector2(self):
(x, y) = unpack_little_vector2_from(self.view, self.Position)
self.Position += 8
return Vector2(x, y)
def read_vector3(self):
(x, y, z) = unpack_little_vector3_from(self.view, self.Position)
self.Position += 12
return Vector3(x, y, z)
def read_vector4(self):
(x, y, z, w) = unpack_little_vector4_from(self.view, self.Position)
self.Position += 16
return Vector4(x, y, z, w)
class EndianBinaryReader_Memoryview_BigEndian(EndianBinaryReader_Memoryview):
def read_u_short(self):
(ret,) = unpack_big_u_short_from(self.view, self.Position)
self.Position += 2
return ret
def read_short(self):
(ret,) = unpack_big_short_from(self.view, self.Position)
self.Position += 2
return ret
def read_int(self):
(ret,) = unpack_big_int_from(self.view, self.Position)
self.Position += 4
return ret
def read_u_int(self):
(ret,) = unpack_big_u_int_from(self.view, self.Position)
self.Position += 4
return ret
def read_long(self):
(ret,) = unpack_big_long_from(self.view, self.Position)
self.Position += 8
return ret
def read_u_long(self):
(ret,) = unpack_big_u_long_from(self.view, self.Position)
self.Position += 8
return ret
def read_half(self):
(ret,) = unpack_big_half_from(self.view, self.Position)
self.Position += 2
return ret
def read_float(self):
(ret,) = unpack_big_float_from(self.view, self.Position)
self.Position += 4
return ret
def read_double(self):
(ret,) = unpack_big_double_from(self.view, self.Position)
self.Position += 8
return ret
def read_vector2(self):
(x, y) = unpack_big_vector2_from(self.view, self.Position)
self.Position += 8
return Vector2(x, y)
def read_vector3(self):
(x, y, z) = unpack_big_vector3_from(self.view, self.Position)
self.Position += 12
return Vector3(x, y, z)
def read_vector4(self):
(x, y, z, w) = unpack_big_vector4_from(self.view, self.Position)
self.Position += 16
return Vector4(x, y, z, w)
class EndianBinaryReader_Streamable(EndianBinaryReader):
__slots__ = ("stream", "_endian", "BaseOffset")
stream: BufferedReader
def __init__(self, stream, endian=">", offset=0):
self._endian = ""
self.stream = stream
super().__init__(stream, endian=endian, offset=offset)
self.read = self.stream.read
def get_position(self):
return self.stream.tell()
def set_position(self, value):
self.stream.seek(value + self.BaseOffset)
@property
def endian(self):
return self._endian
@endian.setter
def endian(self, value):
if value not in ("<", ">"):
raise ValueError("Invalid endian")
if value != self._endian:
setattr(
self,
"__class__",
EndianBinaryReader_Streamable_LittleEndian
if value == "<"
else EndianBinaryReader_Streamable_BigEndian,
)
self._endian = value
@property
def Length(self):
pos = self.Position
length = self.stream.seek(0, 2) - self.BaseOffset
self.Position = pos
return length
Position = property(get_position, set_position)
@property
def bytes(self):
last_pos = self.Position
self.Position = 0
ret = self.read(self.Length)
self.Position = last_pos
return ret
def dispose(self):
self.stream.close()
pass
class EndianBinaryReader_Streamable_LittleEndian(EndianBinaryReader_Streamable):
def read_u_short(self):
return unpack_little_u_short(self.read(2))[0]
def read_short(self):
return unpack_little_short(self.read(2))[0]
def read_int(self):
return unpack_little_int(self.read(4))[0]
def read_u_int(self):
return unpack_little_u_int(self.read(4))[0]
def read_long(self):
return unpack_little_long(self.read(8))[0]
def read_u_long(self):
return unpack_little_u_long(self.read(8))[0]
def read_half(self):
return unpack_little_half(self.read(2))[0]
def read_float(self):
return unpack_little_float(self.read(4))[0]
def read_double(self):
return unpack_little_double(self.read(8))[0]
def read_vector2(self):
return Vector2(*unpack_little_vector2(self.read(8)))
def read_vector3(self):
return Vector3(*unpack_little_vector3(self.read(12)))
def read_vector4(self):
return Vector4(*unpack_little_vector4(self.read(16)))
class EndianBinaryReader_Streamable_BigEndian(EndianBinaryReader_Streamable):
def read_u_short(self):
return unpack_big_u_short(self.read(2))[0]
def read_short(self):
return unpack_big_short(self.read(2))[0]
def read_int(self):
return unpack_big_int(self.read(4))[0]
def read_u_int(self):
return unpack_big_u_int(self.read(4))[0]
def read_long(self):
return unpack_big_long(self.read(8))[0]
def read_u_long(self):
return unpack_big_u_long(self.read(8))[0]
def read_half(self):
return unpack_big_half(self.read(2))[0]
def read_float(self):
return unpack_big_float(self.read(4))[0]
def read_double(self):
return unpack_big_double(self.read(8))[0]
def read_vector2(self):
return Vector2(*unpack_big_vector2(self.read(8)))
def read_vector3(self):
return Vector3(*unpack_big_vector3(self.read(12)))
def read_vector4(self):
return Vector4(*unpack_big_vector4(self.read(16)))