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