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3ca3f77f U |
1 | from __future__ import unicode_literals |
2 | ||
3 | import collections | |
4 | import io | |
5 | import zlib | |
6 | ||
7 | from .compat import ( | |
8 | compat_str, | |
9 | compat_struct_unpack, | |
10 | ) | |
11 | from .utils import ( | |
12 | ExtractorError, | |
13 | ) | |
14 | ||
15 | ||
16 | def _extract_tags(file_contents): | |
17 | if file_contents[1:3] != b'WS': | |
18 | raise ExtractorError( | |
19 | 'Not an SWF file; header is %r' % file_contents[:3]) | |
20 | if file_contents[:1] == b'C': | |
21 | content = zlib.decompress(file_contents[8:]) | |
22 | else: | |
23 | raise NotImplementedError( | |
24 | 'Unsupported compression format %r' % | |
25 | file_contents[:1]) | |
26 | ||
27 | # Determine number of bits in framesize rectangle | |
28 | framesize_nbits = compat_struct_unpack('!B', content[:1])[0] >> 3 | |
29 | framesize_len = (5 + 4 * framesize_nbits + 7) // 8 | |
30 | ||
31 | pos = framesize_len + 2 + 2 | |
32 | while pos < len(content): | |
33 | header16 = compat_struct_unpack('<H', content[pos:pos + 2])[0] | |
34 | pos += 2 | |
35 | tag_code = header16 >> 6 | |
36 | tag_len = header16 & 0x3f | |
37 | if tag_len == 0x3f: | |
38 | tag_len = compat_struct_unpack('<I', content[pos:pos + 4])[0] | |
39 | pos += 4 | |
40 | assert pos + tag_len <= len(content), \ | |
41 | ('Tag %d ends at %d+%d - that\'s longer than the file (%d)' | |
42 | % (tag_code, pos, tag_len, len(content))) | |
43 | yield (tag_code, content[pos:pos + tag_len]) | |
44 | pos += tag_len | |
45 | ||
46 | ||
47 | class _AVMClass_Object(object): | |
48 | def __init__(self, avm_class): | |
49 | self.avm_class = avm_class | |
50 | ||
51 | def __repr__(self): | |
52 | return '%s#%x' % (self.avm_class.name, id(self)) | |
53 | ||
54 | ||
55 | class _ScopeDict(dict): | |
56 | def __init__(self, avm_class): | |
57 | super(_ScopeDict, self).__init__() | |
58 | self.avm_class = avm_class | |
59 | ||
60 | def __repr__(self): | |
61 | return '%s__Scope(%s)' % ( | |
62 | self.avm_class.name, | |
63 | super(_ScopeDict, self).__repr__()) | |
64 | ||
65 | ||
66 | class _AVMClass(object): | |
67 | def __init__(self, name_idx, name, static_properties=None): | |
68 | self.name_idx = name_idx | |
69 | self.name = name | |
70 | self.method_names = {} | |
71 | self.method_idxs = {} | |
72 | self.methods = {} | |
73 | self.method_pyfunctions = {} | |
74 | self.static_properties = static_properties if static_properties else {} | |
75 | ||
76 | self.variables = _ScopeDict(self) | |
77 | self.constants = {} | |
78 | ||
79 | def make_object(self): | |
80 | return _AVMClass_Object(self) | |
81 | ||
82 | def __repr__(self): | |
83 | return '_AVMClass(%s)' % (self.name) | |
84 | ||
85 | def register_methods(self, methods): | |
86 | self.method_names.update(methods.items()) | |
87 | self.method_idxs.update(dict( | |
88 | (idx, name) | |
89 | for name, idx in methods.items())) | |
90 | ||
91 | ||
92 | class _Multiname(object): | |
93 | def __init__(self, kind): | |
94 | self.kind = kind | |
95 | ||
96 | def __repr__(self): | |
97 | return '[MULTINAME kind: 0x%x]' % self.kind | |
98 | ||
99 | ||
100 | def _read_int(reader): | |
101 | res = 0 | |
102 | shift = 0 | |
103 | for _ in range(5): | |
104 | buf = reader.read(1) | |
105 | assert len(buf) == 1 | |
106 | b = compat_struct_unpack('<B', buf)[0] | |
107 | res = res | ((b & 0x7f) << shift) | |
108 | if b & 0x80 == 0: | |
109 | break | |
110 | shift += 7 | |
111 | return res | |
112 | ||
113 | ||
114 | def _u30(reader): | |
115 | res = _read_int(reader) | |
116 | assert res & 0xf0000000 == 0 | |
117 | return res | |
118 | ||
119 | ||
120 | _u32 = _read_int | |
121 | ||
122 | ||
123 | def _s32(reader): | |
124 | v = _read_int(reader) | |
125 | if v & 0x80000000 != 0: | |
126 | v = - ((v ^ 0xffffffff) + 1) | |
127 | return v | |
128 | ||
129 | ||
130 | def _s24(reader): | |
131 | bs = reader.read(3) | |
132 | assert len(bs) == 3 | |
133 | last_byte = b'\xff' if (ord(bs[2:3]) >= 0x80) else b'\x00' | |
134 | return compat_struct_unpack('<i', bs + last_byte)[0] | |
135 | ||
136 | ||
137 | def _read_string(reader): | |
138 | slen = _u30(reader) | |
139 | resb = reader.read(slen) | |
140 | assert len(resb) == slen | |
141 | return resb.decode('utf-8') | |
142 | ||
143 | ||
144 | def _read_bytes(count, reader): | |
145 | assert count >= 0 | |
146 | resb = reader.read(count) | |
147 | assert len(resb) == count | |
148 | return resb | |
149 | ||
150 | ||
151 | def _read_byte(reader): | |
152 | resb = _read_bytes(1, reader=reader) | |
153 | res = compat_struct_unpack('<B', resb)[0] | |
154 | return res | |
155 | ||
156 | ||
157 | StringClass = _AVMClass('(no name idx)', 'String') | |
158 | ByteArrayClass = _AVMClass('(no name idx)', 'ByteArray') | |
159 | TimerClass = _AVMClass('(no name idx)', 'Timer') | |
160 | TimerEventClass = _AVMClass('(no name idx)', 'TimerEvent', {'TIMER': 'timer'}) | |
161 | _builtin_classes = { | |
162 | StringClass.name: StringClass, | |
163 | ByteArrayClass.name: ByteArrayClass, | |
164 | TimerClass.name: TimerClass, | |
165 | TimerEventClass.name: TimerEventClass, | |
166 | } | |
167 | ||
168 | ||
169 | class _Undefined(object): | |
170 | def __bool__(self): | |
171 | return False | |
172 | __nonzero__ = __bool__ | |
173 | ||
174 | def __hash__(self): | |
175 | return 0 | |
176 | ||
177 | def __str__(self): | |
178 | return 'undefined' | |
179 | __repr__ = __str__ | |
180 | ||
181 | ||
182 | undefined = _Undefined() | |
183 | ||
184 | ||
185 | class SWFInterpreter(object): | |
186 | def __init__(self, file_contents): | |
187 | self._patched_functions = { | |
188 | (TimerClass, 'addEventListener'): lambda params: undefined, | |
189 | } | |
190 | code_tag = next(tag | |
191 | for tag_code, tag in _extract_tags(file_contents) | |
192 | if tag_code == 82) | |
193 | p = code_tag.index(b'\0', 4) + 1 | |
194 | code_reader = io.BytesIO(code_tag[p:]) | |
195 | ||
196 | # Parse ABC (AVM2 ByteCode) | |
197 | ||
198 | # Define a couple convenience methods | |
199 | u30 = lambda *args: _u30(*args, reader=code_reader) | |
200 | s32 = lambda *args: _s32(*args, reader=code_reader) | |
201 | u32 = lambda *args: _u32(*args, reader=code_reader) | |
202 | read_bytes = lambda *args: _read_bytes(*args, reader=code_reader) | |
203 | read_byte = lambda *args: _read_byte(*args, reader=code_reader) | |
204 | ||
205 | # minor_version + major_version | |
206 | read_bytes(2 + 2) | |
207 | ||
208 | # Constant pool | |
209 | int_count = u30() | |
210 | self.constant_ints = [0] | |
211 | for _c in range(1, int_count): | |
212 | self.constant_ints.append(s32()) | |
213 | self.constant_uints = [0] | |
214 | uint_count = u30() | |
215 | for _c in range(1, uint_count): | |
216 | self.constant_uints.append(u32()) | |
217 | double_count = u30() | |
218 | read_bytes(max(0, (double_count - 1)) * 8) | |
219 | string_count = u30() | |
220 | self.constant_strings = [''] | |
221 | for _c in range(1, string_count): | |
222 | s = _read_string(code_reader) | |
223 | self.constant_strings.append(s) | |
224 | namespace_count = u30() | |
225 | for _c in range(1, namespace_count): | |
226 | read_bytes(1) # kind | |
227 | u30() # name | |
228 | ns_set_count = u30() | |
229 | for _c in range(1, ns_set_count): | |
230 | count = u30() | |
231 | for _c2 in range(count): | |
232 | u30() | |
233 | multiname_count = u30() | |
234 | MULTINAME_SIZES = { | |
235 | 0x07: 2, # QName | |
236 | 0x0d: 2, # QNameA | |
237 | 0x0f: 1, # RTQName | |
238 | 0x10: 1, # RTQNameA | |
239 | 0x11: 0, # RTQNameL | |
240 | 0x12: 0, # RTQNameLA | |
241 | 0x09: 2, # Multiname | |
242 | 0x0e: 2, # MultinameA | |
243 | 0x1b: 1, # MultinameL | |
244 | 0x1c: 1, # MultinameLA | |
245 | } | |
246 | self.multinames = [''] | |
247 | for _c in range(1, multiname_count): | |
248 | kind = u30() | |
249 | assert kind in MULTINAME_SIZES, 'Invalid multiname kind %r' % kind | |
250 | if kind == 0x07: | |
251 | u30() # namespace_idx | |
252 | name_idx = u30() | |
253 | self.multinames.append(self.constant_strings[name_idx]) | |
254 | elif kind == 0x09: | |
255 | name_idx = u30() | |
256 | u30() | |
257 | self.multinames.append(self.constant_strings[name_idx]) | |
258 | else: | |
259 | self.multinames.append(_Multiname(kind)) | |
260 | for _c2 in range(MULTINAME_SIZES[kind]): | |
261 | u30() | |
262 | ||
263 | # Methods | |
264 | method_count = u30() | |
265 | MethodInfo = collections.namedtuple( | |
266 | 'MethodInfo', | |
267 | ['NEED_ARGUMENTS', 'NEED_REST']) | |
268 | method_infos = [] | |
269 | for method_id in range(method_count): | |
270 | param_count = u30() | |
271 | u30() # return type | |
272 | for _ in range(param_count): | |
273 | u30() # param type | |
274 | u30() # name index (always 0 for youtube) | |
275 | flags = read_byte() | |
276 | if flags & 0x08 != 0: | |
277 | # Options present | |
278 | option_count = u30() | |
279 | for c in range(option_count): | |
280 | u30() # val | |
281 | read_bytes(1) # kind | |
282 | if flags & 0x80 != 0: | |
283 | # Param names present | |
284 | for _ in range(param_count): | |
285 | u30() # param name | |
286 | mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0) | |
287 | method_infos.append(mi) | |
288 | ||
289 | # Metadata | |
290 | metadata_count = u30() | |
291 | for _c in range(metadata_count): | |
292 | u30() # name | |
293 | item_count = u30() | |
294 | for _c2 in range(item_count): | |
295 | u30() # key | |
296 | u30() # value | |
297 | ||
298 | def parse_traits_info(): | |
299 | trait_name_idx = u30() | |
300 | kind_full = read_byte() | |
301 | kind = kind_full & 0x0f | |
302 | attrs = kind_full >> 4 | |
303 | methods = {} | |
304 | constants = None | |
305 | if kind == 0x00: # Slot | |
306 | u30() # Slot id | |
307 | u30() # type_name_idx | |
308 | vindex = u30() | |
309 | if vindex != 0: | |
310 | read_byte() # vkind | |
311 | elif kind == 0x06: # Const | |
312 | u30() # Slot id | |
313 | u30() # type_name_idx | |
314 | vindex = u30() | |
315 | vkind = 'any' | |
316 | if vindex != 0: | |
317 | vkind = read_byte() | |
318 | if vkind == 0x03: # Constant_Int | |
319 | value = self.constant_ints[vindex] | |
320 | elif vkind == 0x04: # Constant_UInt | |
321 | value = self.constant_uints[vindex] | |
322 | else: | |
323 | return {}, None # Ignore silently for now | |
324 | constants = {self.multinames[trait_name_idx]: value} | |
325 | elif kind in (0x01, 0x02, 0x03): # Method / Getter / Setter | |
326 | u30() # disp_id | |
327 | method_idx = u30() | |
328 | methods[self.multinames[trait_name_idx]] = method_idx | |
329 | elif kind == 0x04: # Class | |
330 | u30() # slot_id | |
331 | u30() # classi | |
332 | elif kind == 0x05: # Function | |
333 | u30() # slot_id | |
334 | function_idx = u30() | |
335 | methods[function_idx] = self.multinames[trait_name_idx] | |
336 | else: | |
337 | raise ExtractorError('Unsupported trait kind %d' % kind) | |
338 | ||
339 | if attrs & 0x4 != 0: # Metadata present | |
340 | metadata_count = u30() | |
341 | for _c3 in range(metadata_count): | |
342 | u30() # metadata index | |
343 | ||
344 | return methods, constants | |
345 | ||
346 | # Classes | |
347 | class_count = u30() | |
348 | classes = [] | |
349 | for class_id in range(class_count): | |
350 | name_idx = u30() | |
351 | ||
352 | cname = self.multinames[name_idx] | |
353 | avm_class = _AVMClass(name_idx, cname) | |
354 | classes.append(avm_class) | |
355 | ||
356 | u30() # super_name idx | |
357 | flags = read_byte() | |
358 | if flags & 0x08 != 0: # Protected namespace is present | |
359 | u30() # protected_ns_idx | |
360 | intrf_count = u30() | |
361 | for _c2 in range(intrf_count): | |
362 | u30() | |
363 | u30() # iinit | |
364 | trait_count = u30() | |
365 | for _c2 in range(trait_count): | |
366 | trait_methods, trait_constants = parse_traits_info() | |
367 | avm_class.register_methods(trait_methods) | |
368 | if trait_constants: | |
369 | avm_class.constants.update(trait_constants) | |
370 | ||
371 | assert len(classes) == class_count | |
372 | self._classes_by_name = dict((c.name, c) for c in classes) | |
373 | ||
374 | for avm_class in classes: | |
375 | avm_class.cinit_idx = u30() | |
376 | trait_count = u30() | |
377 | for _c2 in range(trait_count): | |
378 | trait_methods, trait_constants = parse_traits_info() | |
379 | avm_class.register_methods(trait_methods) | |
380 | if trait_constants: | |
381 | avm_class.constants.update(trait_constants) | |
382 | ||
383 | # Scripts | |
384 | script_count = u30() | |
385 | for _c in range(script_count): | |
386 | u30() # init | |
387 | trait_count = u30() | |
388 | for _c2 in range(trait_count): | |
389 | parse_traits_info() | |
390 | ||
391 | # Method bodies | |
392 | method_body_count = u30() | |
393 | Method = collections.namedtuple('Method', ['code', 'local_count']) | |
394 | self._all_methods = [] | |
395 | for _c in range(method_body_count): | |
396 | method_idx = u30() | |
397 | u30() # max_stack | |
398 | local_count = u30() | |
399 | u30() # init_scope_depth | |
400 | u30() # max_scope_depth | |
401 | code_length = u30() | |
402 | code = read_bytes(code_length) | |
403 | m = Method(code, local_count) | |
404 | self._all_methods.append(m) | |
405 | for avm_class in classes: | |
406 | if method_idx in avm_class.method_idxs: | |
407 | avm_class.methods[avm_class.method_idxs[method_idx]] = m | |
408 | exception_count = u30() | |
409 | for _c2 in range(exception_count): | |
410 | u30() # from | |
411 | u30() # to | |
412 | u30() # target | |
413 | u30() # exc_type | |
414 | u30() # var_name | |
415 | trait_count = u30() | |
416 | for _c2 in range(trait_count): | |
417 | parse_traits_info() | |
418 | ||
419 | assert p + code_reader.tell() == len(code_tag) | |
420 | ||
421 | def patch_function(self, avm_class, func_name, f): | |
422 | self._patched_functions[(avm_class, func_name)] = f | |
423 | ||
424 | def extract_class(self, class_name, call_cinit=True): | |
425 | try: | |
426 | res = self._classes_by_name[class_name] | |
427 | except KeyError: | |
428 | raise ExtractorError('Class %r not found' % class_name) | |
429 | ||
430 | if call_cinit and hasattr(res, 'cinit_idx'): | |
431 | res.register_methods({'$cinit': res.cinit_idx}) | |
432 | res.methods['$cinit'] = self._all_methods[res.cinit_idx] | |
433 | cinit = self.extract_function(res, '$cinit') | |
434 | cinit([]) | |
435 | ||
436 | return res | |
437 | ||
438 | def extract_function(self, avm_class, func_name): | |
439 | p = self._patched_functions.get((avm_class, func_name)) | |
440 | if p: | |
441 | return p | |
442 | if func_name in avm_class.method_pyfunctions: | |
443 | return avm_class.method_pyfunctions[func_name] | |
444 | if func_name in self._classes_by_name: | |
445 | return self._classes_by_name[func_name].make_object() | |
446 | if func_name not in avm_class.methods: | |
447 | raise ExtractorError('Cannot find function %s.%s' % ( | |
448 | avm_class.name, func_name)) | |
449 | m = avm_class.methods[func_name] | |
450 | ||
451 | def resfunc(args): | |
452 | # Helper functions | |
453 | coder = io.BytesIO(m.code) | |
454 | s24 = lambda: _s24(coder) | |
455 | u30 = lambda: _u30(coder) | |
456 | ||
457 | registers = [avm_class.variables] + list(args) + [None] * m.local_count | |
458 | stack = [] | |
459 | scopes = collections.deque([ | |
460 | self._classes_by_name, avm_class.constants, avm_class.variables]) | |
461 | while True: | |
462 | opcode = _read_byte(coder) | |
463 | if opcode == 9: # label | |
464 | pass # Spec says: "Do nothing." | |
465 | elif opcode == 16: # jump | |
466 | offset = s24() | |
467 | coder.seek(coder.tell() + offset) | |
468 | elif opcode == 17: # iftrue | |
469 | offset = s24() | |
470 | value = stack.pop() | |
471 | if value: | |
472 | coder.seek(coder.tell() + offset) | |
473 | elif opcode == 18: # iffalse | |
474 | offset = s24() | |
475 | value = stack.pop() | |
476 | if not value: | |
477 | coder.seek(coder.tell() + offset) | |
478 | elif opcode == 19: # ifeq | |
479 | offset = s24() | |
480 | value2 = stack.pop() | |
481 | value1 = stack.pop() | |
482 | if value2 == value1: | |
483 | coder.seek(coder.tell() + offset) | |
484 | elif opcode == 20: # ifne | |
485 | offset = s24() | |
486 | value2 = stack.pop() | |
487 | value1 = stack.pop() | |
488 | if value2 != value1: | |
489 | coder.seek(coder.tell() + offset) | |
490 | elif opcode == 21: # iflt | |
491 | offset = s24() | |
492 | value2 = stack.pop() | |
493 | value1 = stack.pop() | |
494 | if value1 < value2: | |
495 | coder.seek(coder.tell() + offset) | |
496 | elif opcode == 32: # pushnull | |
497 | stack.append(None) | |
498 | elif opcode == 33: # pushundefined | |
499 | stack.append(undefined) | |
500 | elif opcode == 36: # pushbyte | |
501 | v = _read_byte(coder) | |
502 | stack.append(v) | |
503 | elif opcode == 37: # pushshort | |
504 | v = u30() | |
505 | stack.append(v) | |
506 | elif opcode == 38: # pushtrue | |
507 | stack.append(True) | |
508 | elif opcode == 39: # pushfalse | |
509 | stack.append(False) | |
510 | elif opcode == 40: # pushnan | |
511 | stack.append(float('NaN')) | |
512 | elif opcode == 42: # dup | |
513 | value = stack[-1] | |
514 | stack.append(value) | |
515 | elif opcode == 44: # pushstring | |
516 | idx = u30() | |
517 | stack.append(self.constant_strings[idx]) | |
518 | elif opcode == 48: # pushscope | |
519 | new_scope = stack.pop() | |
520 | scopes.append(new_scope) | |
521 | elif opcode == 66: # construct | |
522 | arg_count = u30() | |
523 | args = list(reversed( | |
524 | [stack.pop() for _ in range(arg_count)])) | |
525 | obj = stack.pop() | |
526 | res = obj.avm_class.make_object() | |
527 | stack.append(res) | |
528 | elif opcode == 70: # callproperty | |
529 | index = u30() | |
530 | mname = self.multinames[index] | |
531 | arg_count = u30() | |
532 | args = list(reversed( | |
533 | [stack.pop() for _ in range(arg_count)])) | |
534 | obj = stack.pop() | |
535 | ||
536 | if obj == StringClass: | |
537 | if mname == 'String': | |
538 | assert len(args) == 1 | |
539 | assert isinstance(args[0], ( | |
540 | int, compat_str, _Undefined)) | |
541 | if args[0] == undefined: | |
542 | res = 'undefined' | |
543 | else: | |
544 | res = compat_str(args[0]) | |
545 | stack.append(res) | |
546 | continue | |
547 | else: | |
548 | raise NotImplementedError( | |
549 | 'Function String.%s is not yet implemented' | |
550 | % mname) | |
551 | elif isinstance(obj, _AVMClass_Object): | |
552 | func = self.extract_function(obj.avm_class, mname) | |
553 | res = func(args) | |
554 | stack.append(res) | |
555 | continue | |
556 | elif isinstance(obj, _AVMClass): | |
557 | func = self.extract_function(obj, mname) | |
558 | res = func(args) | |
559 | stack.append(res) | |
560 | continue | |
561 | elif isinstance(obj, _ScopeDict): | |
562 | if mname in obj.avm_class.method_names: | |
563 | func = self.extract_function(obj.avm_class, mname) | |
564 | res = func(args) | |
565 | else: | |
566 | res = obj[mname] | |
567 | stack.append(res) | |
568 | continue | |
569 | elif isinstance(obj, compat_str): | |
570 | if mname == 'split': | |
571 | assert len(args) == 1 | |
572 | assert isinstance(args[0], compat_str) | |
573 | if args[0] == '': | |
574 | res = list(obj) | |
575 | else: | |
576 | res = obj.split(args[0]) | |
577 | stack.append(res) | |
578 | continue | |
579 | elif mname == 'charCodeAt': | |
580 | assert len(args) <= 1 | |
581 | idx = 0 if len(args) == 0 else args[0] | |
582 | assert isinstance(idx, int) | |
583 | res = ord(obj[idx]) | |
584 | stack.append(res) | |
585 | continue | |
586 | elif isinstance(obj, list): | |
587 | if mname == 'slice': | |
588 | assert len(args) == 1 | |
589 | assert isinstance(args[0], int) | |
590 | res = obj[args[0]:] | |
591 | stack.append(res) | |
592 | continue | |
593 | elif mname == 'join': | |
594 | assert len(args) == 1 | |
595 | assert isinstance(args[0], compat_str) | |
596 | res = args[0].join(obj) | |
597 | stack.append(res) | |
598 | continue | |
599 | raise NotImplementedError( | |
600 | 'Unsupported property %r on %r' | |
601 | % (mname, obj)) | |
602 | elif opcode == 71: # returnvoid | |
603 | res = undefined | |
604 | return res | |
605 | elif opcode == 72: # returnvalue | |
606 | res = stack.pop() | |
607 | return res | |
608 | elif opcode == 73: # constructsuper | |
609 | # Not yet implemented, just hope it works without it | |
610 | arg_count = u30() | |
611 | args = list(reversed( | |
612 | [stack.pop() for _ in range(arg_count)])) | |
613 | obj = stack.pop() | |
614 | elif opcode == 74: # constructproperty | |
615 | index = u30() | |
616 | arg_count = u30() | |
617 | args = list(reversed( | |
618 | [stack.pop() for _ in range(arg_count)])) | |
619 | obj = stack.pop() | |
620 | ||
621 | mname = self.multinames[index] | |
622 | assert isinstance(obj, _AVMClass) | |
623 | ||
624 | # We do not actually call the constructor for now; | |
625 | # we just pretend it does nothing | |
626 | stack.append(obj.make_object()) | |
627 | elif opcode == 79: # callpropvoid | |
628 | index = u30() | |
629 | mname = self.multinames[index] | |
630 | arg_count = u30() | |
631 | args = list(reversed( | |
632 | [stack.pop() for _ in range(arg_count)])) | |
633 | obj = stack.pop() | |
634 | if isinstance(obj, _AVMClass_Object): | |
635 | func = self.extract_function(obj.avm_class, mname) | |
636 | res = func(args) | |
637 | assert res is undefined | |
638 | continue | |
639 | if isinstance(obj, _ScopeDict): | |
640 | assert mname in obj.avm_class.method_names | |
641 | func = self.extract_function(obj.avm_class, mname) | |
642 | res = func(args) | |
643 | assert res is undefined | |
644 | continue | |
645 | if mname == 'reverse': | |
646 | assert isinstance(obj, list) | |
647 | obj.reverse() | |
648 | else: | |
649 | raise NotImplementedError( | |
650 | 'Unsupported (void) property %r on %r' | |
651 | % (mname, obj)) | |
652 | elif opcode == 86: # newarray | |
653 | arg_count = u30() | |
654 | arr = [] | |
655 | for i in range(arg_count): | |
656 | arr.append(stack.pop()) | |
657 | arr = arr[::-1] | |
658 | stack.append(arr) | |
659 | elif opcode == 93: # findpropstrict | |
660 | index = u30() | |
661 | mname = self.multinames[index] | |
662 | for s in reversed(scopes): | |
663 | if mname in s: | |
664 | res = s | |
665 | break | |
666 | else: | |
667 | res = scopes[0] | |
668 | if mname not in res and mname in _builtin_classes: | |
669 | stack.append(_builtin_classes[mname]) | |
670 | else: | |
671 | stack.append(res[mname]) | |
672 | elif opcode == 94: # findproperty | |
673 | index = u30() | |
674 | mname = self.multinames[index] | |
675 | for s in reversed(scopes): | |
676 | if mname in s: | |
677 | res = s | |
678 | break | |
679 | else: | |
680 | res = avm_class.variables | |
681 | stack.append(res) | |
682 | elif opcode == 96: # getlex | |
683 | index = u30() | |
684 | mname = self.multinames[index] | |
685 | for s in reversed(scopes): | |
686 | if mname in s: | |
687 | scope = s | |
688 | break | |
689 | else: | |
690 | scope = avm_class.variables | |
691 | ||
692 | if mname in scope: | |
693 | res = scope[mname] | |
694 | elif mname in _builtin_classes: | |
695 | res = _builtin_classes[mname] | |
696 | else: | |
697 | # Assume uninitialized | |
698 | # TODO warn here | |
699 | res = undefined | |
700 | stack.append(res) | |
701 | elif opcode == 97: # setproperty | |
702 | index = u30() | |
703 | value = stack.pop() | |
704 | idx = self.multinames[index] | |
705 | if isinstance(idx, _Multiname): | |
706 | idx = stack.pop() | |
707 | obj = stack.pop() | |
708 | obj[idx] = value | |
709 | elif opcode == 98: # getlocal | |
710 | index = u30() | |
711 | stack.append(registers[index]) | |
712 | elif opcode == 99: # setlocal | |
713 | index = u30() | |
714 | value = stack.pop() | |
715 | registers[index] = value | |
716 | elif opcode == 102: # getproperty | |
717 | index = u30() | |
718 | pname = self.multinames[index] | |
719 | if pname == 'length': | |
720 | obj = stack.pop() | |
721 | assert isinstance(obj, (compat_str, list)) | |
722 | stack.append(len(obj)) | |
723 | elif isinstance(pname, compat_str): # Member access | |
724 | obj = stack.pop() | |
725 | if isinstance(obj, _AVMClass): | |
726 | res = obj.static_properties[pname] | |
727 | stack.append(res) | |
728 | continue | |
729 | ||
730 | assert isinstance(obj, (dict, _ScopeDict)),\ | |
731 | 'Accessing member %r on %r' % (pname, obj) | |
732 | res = obj.get(pname, undefined) | |
733 | stack.append(res) | |
734 | else: # Assume attribute access | |
735 | idx = stack.pop() | |
736 | assert isinstance(idx, int) | |
737 | obj = stack.pop() | |
738 | assert isinstance(obj, list) | |
739 | stack.append(obj[idx]) | |
740 | elif opcode == 104: # initproperty | |
741 | index = u30() | |
742 | value = stack.pop() | |
743 | idx = self.multinames[index] | |
744 | if isinstance(idx, _Multiname): | |
745 | idx = stack.pop() | |
746 | obj = stack.pop() | |
747 | obj[idx] = value | |
748 | elif opcode == 115: # convert_ | |
749 | value = stack.pop() | |
750 | intvalue = int(value) | |
751 | stack.append(intvalue) | |
752 | elif opcode == 128: # coerce | |
753 | u30() | |
754 | elif opcode == 130: # coerce_a | |
755 | value = stack.pop() | |
756 | # um, yes, it's any value | |
757 | stack.append(value) | |
758 | elif opcode == 133: # coerce_s | |
759 | assert isinstance(stack[-1], (type(None), compat_str)) | |
760 | elif opcode == 147: # decrement | |
761 | value = stack.pop() | |
762 | assert isinstance(value, int) | |
763 | stack.append(value - 1) | |
764 | elif opcode == 149: # typeof | |
765 | value = stack.pop() | |
766 | return { | |
767 | _Undefined: 'undefined', | |
768 | compat_str: 'String', | |
769 | int: 'Number', | |
770 | float: 'Number', | |
771 | }[type(value)] | |
772 | elif opcode == 160: # add | |
773 | value2 = stack.pop() | |
774 | value1 = stack.pop() | |
775 | res = value1 + value2 | |
776 | stack.append(res) | |
777 | elif opcode == 161: # subtract | |
778 | value2 = stack.pop() | |
779 | value1 = stack.pop() | |
780 | res = value1 - value2 | |
781 | stack.append(res) | |
782 | elif opcode == 162: # multiply | |
783 | value2 = stack.pop() | |
784 | value1 = stack.pop() | |
785 | res = value1 * value2 | |
786 | stack.append(res) | |
787 | elif opcode == 164: # modulo | |
788 | value2 = stack.pop() | |
789 | value1 = stack.pop() | |
790 | res = value1 % value2 | |
791 | stack.append(res) | |
792 | elif opcode == 168: # bitand | |
793 | value2 = stack.pop() | |
794 | value1 = stack.pop() | |
795 | assert isinstance(value1, int) | |
796 | assert isinstance(value2, int) | |
797 | res = value1 & value2 | |
798 | stack.append(res) | |
799 | elif opcode == 171: # equals | |
800 | value2 = stack.pop() | |
801 | value1 = stack.pop() | |
802 | result = value1 == value2 | |
803 | stack.append(result) | |
804 | elif opcode == 175: # greaterequals | |
805 | value2 = stack.pop() | |
806 | value1 = stack.pop() | |
807 | result = value1 >= value2 | |
808 | stack.append(result) | |
809 | elif opcode == 192: # increment_i | |
810 | value = stack.pop() | |
811 | assert isinstance(value, int) | |
812 | stack.append(value + 1) | |
813 | elif opcode == 208: # getlocal_0 | |
814 | stack.append(registers[0]) | |
815 | elif opcode == 209: # getlocal_1 | |
816 | stack.append(registers[1]) | |
817 | elif opcode == 210: # getlocal_2 | |
818 | stack.append(registers[2]) | |
819 | elif opcode == 211: # getlocal_3 | |
820 | stack.append(registers[3]) | |
821 | elif opcode == 212: # setlocal_0 | |
822 | registers[0] = stack.pop() | |
823 | elif opcode == 213: # setlocal_1 | |
824 | registers[1] = stack.pop() | |
825 | elif opcode == 214: # setlocal_2 | |
826 | registers[2] = stack.pop() | |
827 | elif opcode == 215: # setlocal_3 | |
828 | registers[3] = stack.pop() | |
829 | else: | |
830 | raise NotImplementedError( | |
831 | 'Unsupported opcode %d' % opcode) | |
832 | ||
833 | avm_class.method_pyfunctions[func_name] = resfunc | |
834 | return resfunc |