import collections
import io
-import struct
import zlib
from .utils import (
compat_str,
ExtractorError,
+ struct_unpack,
)
file_contents[:1])
# Determine number of bits in framesize rectangle
- framesize_nbits = struct.unpack('!B', content[:1])[0] >> 3
+ framesize_nbits = struct_unpack('!B', content[:1])[0] >> 3
framesize_len = (5 + 4 * framesize_nbits + 7) // 8
pos = framesize_len + 2 + 2
while pos < len(content):
- header16 = struct.unpack('<H', content[pos:pos + 2])[0]
+ header16 = struct_unpack('<H', content[pos:pos + 2])[0]
pos += 2
tag_code = header16 >> 6
tag_len = header16 & 0x3f
if tag_len == 0x3f:
- tag_len = struct.unpack('<I', content[pos:pos + 4])[0]
+ tag_len = struct_unpack('<I', content[pos:pos + 4])[0]
pos += 4
assert pos + tag_len <= len(content), \
('Tag %d ends at %d+%d - that\'s longer than the file (%d)'
for _ in range(5):
buf = reader.read(1)
assert len(buf) == 1
- b = struct.unpack('<B', buf)[0]
+ b = struct_unpack('<B', buf)[0]
res = res | ((b & 0x7f) << shift)
if b & 0x80 == 0:
break
res = _read_int(reader)
assert res & 0xf0000000 == 0
return res
-u32 = _read_int
+_u32 = _read_int
def _s32(reader):
bs = reader.read(3)
assert len(bs) == 3
last_byte = b'\xff' if (ord(bs[2:3]) >= 0x80) else b'\x00'
- return struct.unpack('<i', bs + last_byte)[0]
+ return struct_unpack('<i', bs + last_byte)[0]
def _read_string(reader):
def _read_byte(reader):
resb = _read_bytes(1, reader=reader)
- res = struct.unpack('<B', resb)[0]
+ res = struct_unpack('<B', resb)[0]
return res
raise ExtractorError('Class %r not found' % class_name)
def extract_function(self, avm_class, func_name):
- print('Extracting %s.%s' % (avm_class.name, func_name))
if func_name in avm_class.method_pyfunctions:
return avm_class.method_pyfunctions[func_name]
if func_name in self._classes_by_name:
s24 = lambda: _s24(coder)
u30 = lambda: _u30(coder)
- print('Invoking %s.%s(%r)' % (avm_class.name, func_name, tuple(args)))
registers = [avm_class.variables] + list(args) + [None] * m.local_count
stack = []
scopes = collections.deque([
self._classes_by_name, avm_class.variables])
while True:
opcode = _read_byte(coder)
- print('opcode: %r, stack(%d): %r' % (opcode, len(stack), stack))
if opcode == 17: # iftrue
offset = s24()
value = stack.pop()
mname = self.multinames[index]
assert isinstance(obj, _AVMClass)
- construct_method = self.extract_function(
- obj, mname)
+
# We do not actually call the constructor for now;
# we just pretend it does nothing
stack.append(obj.make_object())
if isinstance(idx, _Multiname):
idx = stack.pop()
obj = stack.pop()
- print('Setting %r.%r = %r' % (obj, idx, value))
obj[idx] = value
elif opcode == 98: # getlocal
index = u30()