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Don't die on no length opcodes

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This commit is contained in:
Mc-muffin
2023-05-19 10:13:57 -05:00
parent 0300566bbf
commit 90f0d241be
1 changed files with 16 additions and 4 deletions
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20
pythonlib/formats/theirsce.py
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@@ -67,9 +67,14 @@ class Theirsce(FileIO):
def read_tag_bytes(self):
data = b""
while True:
c = self.read(1)
if c == b"\x80":
data += c
break
while self.read_uint8_at(self.tell() + 1) != 0x80:
data += self.read(1)
data += c
opcode = data[-1]
if opcode < 0x80:
@@ -77,6 +82,9 @@ class Theirsce(FileIO):
data += self.read(2)
else:
data += self.read(1)
elif opcode < 0xC0:
continue
elif opcode < 0xE0:
size_mask = (opcode >> 3) & 3
@@ -96,15 +104,19 @@ class Theirsce(FileIO):
elif opcode == 0xF6:
data += self.read(1)
for _ in range(data[-1]):
if ord(data[-1]) & 8 != 0:
cc = self.read_uint8()
data += cc
if cc & 8 != 0:
data += self.read(2)
else:
data += self.read(3)
elif opcode < 0xFC:
data += self.read(2)
elif opcode == 0xFE:
continue
self.read(1)
return data
def read_opcode(self):