StringClass = _AVMClass('(no name idx)', 'String')
+ByteArrayClass = _AVMClass('(no name idx)', 'ByteArray')
+_builtin_classes = {
+ StringClass.name: StringClass,
+ ByteArrayClass.name: ByteArrayClass,
+}
+
+
+class _Undefined(object):
+ def __boolean__(self):
+ return False
+
+ def __hash__(self):
+ return 0
+
+undefined = _Undefined()
class SWFInterpreter(object):
self._classes_by_name, avm_class.variables])
while True:
opcode = _read_byte(coder)
- if opcode == 16: # jump
+ if opcode == 9: # label
+ pass # Spec says: "Do nothing."
+ elif opcode == 16: # jump
offset = s24()
coder.seek(coder.tell() + offset)
elif opcode == 17: # iftrue
value1 = stack.pop()
if value2 != value1:
coder.seek(coder.tell() + offset)
+ elif opcode == 21: # iflt
+ offset = s24()
+ value2 = stack.pop()
+ value1 = stack.pop()
+ if value1 < value2:
+ coder.seek(coder.tell() + offset)
elif opcode == 32: # pushnull
stack.append(None)
+ elif opcode == 33: # pushundefined
+ stack.append(undefined)
elif opcode == 36: # pushbyte
v = _read_byte(coder)
stack.append(v)
+ elif opcode == 37: # pushshort
+ v = u30()
+ stack.append(v)
+ elif opcode == 38: # pushtrue
+ stack.append(True)
+ elif opcode == 39: # pushfalse
+ stack.append(False)
+ elif opcode == 40: # pushnan
+ stack.append(float('NaN'))
elif opcode == 42: # dup
value = stack[-1]
stack.append(value)
[stack.pop() for _ in range(arg_count)]))
obj = stack.pop()
- if isinstance(obj, _AVMClass_Object):
+ if obj == StringClass:
+ if mname == 'String':
+ assert len(args) == 1
+ assert isinstance(args[0], (
+ int, compat_str, _Undefined))
+ if args[0] == undefined:
+ res = 'undefined'
+ else:
+ res = compat_str(args[0])
+ stack.append(res)
+ continue
+ else:
+ raise NotImplementedError(
+ 'Function String.%s is not yet implemented'
+ % mname)
+ elif isinstance(obj, _AVMClass_Object):
func = self.extract_function(obj.avm_class, mname)
res = func(args)
stack.append(res)
continue
+ elif isinstance(obj, _AVMClass):
+ func = self.extract_function(obj, mname)
+ res = func(args)
+ stack.append(res)
+ continue
elif isinstance(obj, _ScopeDict):
if mname in obj.avm_class.method_names:
func = self.extract_function(obj.avm_class, mname)
res = obj.split(args[0])
stack.append(res)
continue
+ elif mname == 'charCodeAt':
+ assert len(args) <= 1
+ idx = 0 if len(args) == 0 else args[0]
+ assert isinstance(idx, int)
+ res = ord(obj[idx])
+ stack.append(res)
+ continue
elif isinstance(obj, list):
if mname == 'slice':
assert len(args) == 1
res = args[0].join(obj)
stack.append(res)
continue
- elif obj == StringClass:
- if mname == 'String':
- assert len(args) == 1
- assert isinstance(args[0], (int, compat_str))
- res = compat_str(args[0])
- stack.append(res)
- continue
- else:
- raise NotImplementedError(
- 'Function String.%s is not yet implemented'
- % mname)
raise NotImplementedError(
'Unsupported property %r on %r'
% (mname, obj))
+ elif opcode == 71: # returnvoid
+ res = undefined
+ return res
elif opcode == 72: # returnvalue
res = stack.pop()
return res
args = list(reversed(
[stack.pop() for _ in range(arg_count)]))
obj = stack.pop()
+ if isinstance(obj, _AVMClass_Object):
+ func = self.extract_function(obj.avm_class, mname)
+ res = func(args)
+ assert res is undefined
+ continue
+ if isinstance(obj, _ScopeDict):
+ assert mname in obj.avm_class.method_names
+ func = self.extract_function(obj.avm_class, mname)
+ res = func(args)
+ assert res is undefined
+ continue
if mname == 'reverse':
assert isinstance(obj, list)
obj.reverse()
break
else:
res = scopes[0]
- if mname not in res and mname == 'String':
- stack.append(StringClass)
+ if mname not in res and mname in _builtin_classes:
+ stack.append(_builtin_classes[mname])
else:
stack.append(res[mname])
elif opcode == 94: # findproperty
obj = stack.pop()
assert isinstance(obj, (dict, _ScopeDict)), \
'Accessing member %r on %r' % (pname, obj)
- stack.append(obj[pname])
+ res = obj.get(pname, undefined)
+ stack.append(res)
else: # Assume attribute access
idx = stack.pop()
assert isinstance(idx, int)
stack.append(intvalue)
elif opcode == 128: # coerce
u30()
+ elif opcode == 130: # coerce_a
+ value = stack.pop()
+ # um, yes, it's any value
+ stack.append(value)
elif opcode == 133: # coerce_s
assert isinstance(stack[-1], (type(None), compat_str))
+ elif opcode == 147: # decrement
+ value = stack.pop()
+ assert isinstance(value, int)
+ stack.append(value - 1)
+ elif opcode == 149: # typeof
+ value = stack.pop()
+ return {
+ _Undefined: 'undefined',
+ compat_str: 'String',
+ int: 'Number',
+ float: 'Number',
+ }[type(value)]
elif opcode == 160: # add
value2 = stack.pop()
value1 = stack.pop()
value1 = stack.pop()
res = value1 - value2
stack.append(res)
+ elif opcode == 162: # multiply
+ value2 = stack.pop()
+ value1 = stack.pop()
+ res = value1 * value2
+ stack.append(res)
elif opcode == 164: # modulo
value2 = stack.pop()
value1 = stack.pop()
res = value1 % value2
stack.append(res)
+ elif opcode == 168: # bitand
+ value2 = stack.pop()
+ value1 = stack.pop()
+ assert isinstance(value1, int)
+ assert isinstance(value2, int)
+ res = value1 & value2
+ stack.append(res)
elif opcode == 171: # equals
value2 = stack.pop()
value1 = stack.pop()
value1 = stack.pop()
result = value1 >= value2
stack.append(result)
+ elif opcode == 192: # increment_i
+ value = stack.pop()
+ assert isinstance(value, int)
+ stack.append(value + 1)
elif opcode == 208: # getlocal_0
stack.append(registers[0])
elif opcode == 209: # getlocal_1
projects / youtube-dl / blobdiff