[swfinterp] Basic support for constants (only ints for now)
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2 changed files with 45 additions and 10 deletions
12
test/swftests/ConstantInt.as
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12
test/swftests/ConstantInt.as
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@ -0,0 +1,12 @@
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// input: []
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// output: 2
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package {
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public class ConstantInt {
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private static const x:int = 2;
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public static function main():int{
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return x;
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}
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}
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}
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@ -71,6 +71,7 @@ class _AVMClass(object):
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self.method_pyfunctions = {}
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self.method_pyfunctions = {}
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self.variables = _ScopeDict(self)
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self.variables = _ScopeDict(self)
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self.constants = {}
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def make_object(self):
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def make_object(self):
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return _AVMClass_Object(self)
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return _AVMClass_Object(self)
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@ -189,11 +190,13 @@ class SWFInterpreter(object):
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# Constant pool
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# Constant pool
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int_count = u30()
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int_count = u30()
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self.constant_ints = [0]
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for _c in range(1, int_count):
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for _c in range(1, int_count):
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s32()
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self.constant_ints.append(s32())
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self.constant_uints = [0]
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uint_count = u30()
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uint_count = u30()
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for _c in range(1, uint_count):
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for _c in range(1, uint_count):
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u32()
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self.constant_uints.append(u32())
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double_count = u30()
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double_count = u30()
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read_bytes(max(0, (double_count - 1)) * 8)
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read_bytes(max(0, (double_count - 1)) * 8)
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string_count = u30()
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string_count = u30()
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@ -281,13 +284,28 @@ class SWFInterpreter(object):
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kind = kind_full & 0x0f
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kind = kind_full & 0x0f
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attrs = kind_full >> 4
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attrs = kind_full >> 4
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methods = {}
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methods = {}
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if kind in [0x00, 0x06]: # Slot or Const
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constants = None
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if kind == 0x00: # Slot
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u30() # Slot id
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u30() # Slot id
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u30() # type_name_idx
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u30() # type_name_idx
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vindex = u30()
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vindex = u30()
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if vindex != 0:
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if vindex != 0:
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read_byte() # vkind
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read_byte() # vkind
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elif kind in [0x01, 0x02, 0x03]: # Method / Getter / Setter
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elif kind == 0x06: # Const
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u30() # Slot id
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u30() # type_name_idx
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vindex = u30()
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vkind = 'any'
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if vindex != 0:
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vkind = read_byte()
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if vkind == 0x03: # Constant_Int
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value = self.constant_ints[vindex]
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elif vkind == 0x04: # Constant_UInt
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value = self.constant_uints[vindex]
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else:
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return {}, None # Ignore silently for now
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constants = {self.multinames[trait_name_idx]: value}
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elif kind in (0x01, 0x02, 0x03): # Method / Getter / Setter
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u30() # disp_id
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u30() # disp_id
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method_idx = u30()
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method_idx = u30()
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methods[self.multinames[trait_name_idx]] = method_idx
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methods[self.multinames[trait_name_idx]] = method_idx
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@ -306,7 +324,7 @@ class SWFInterpreter(object):
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for _c3 in range(metadata_count):
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for _c3 in range(metadata_count):
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u30() # metadata index
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u30() # metadata index
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return methods
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return methods, constants
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# Classes
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# Classes
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class_count = u30()
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class_count = u30()
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@ -328,8 +346,9 @@ class SWFInterpreter(object):
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u30() # iinit
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u30() # iinit
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trait_count = u30()
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trait_count = u30()
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for _c2 in range(trait_count):
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for _c2 in range(trait_count):
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trait_methods = parse_traits_info()
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trait_methods, constants = parse_traits_info()
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avm_class.register_methods(trait_methods)
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avm_class.register_methods(trait_methods)
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assert constants is None
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assert len(classes) == class_count
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assert len(classes) == class_count
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self._classes_by_name = dict((c.name, c) for c in classes)
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self._classes_by_name = dict((c.name, c) for c in classes)
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@ -338,8 +357,10 @@ class SWFInterpreter(object):
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u30() # cinit
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u30() # cinit
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trait_count = u30()
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trait_count = u30()
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for _c2 in range(trait_count):
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for _c2 in range(trait_count):
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trait_methods = parse_traits_info()
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trait_methods, trait_constants = parse_traits_info()
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avm_class.register_methods(trait_methods)
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avm_class.register_methods(trait_methods)
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if trait_constants:
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avm_class.constants.update(trait_constants)
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# Scripts
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# Scripts
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script_count = u30()
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script_count = u30()
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@ -633,9 +654,11 @@ class SWFInterpreter(object):
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break
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break
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else:
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else:
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scope = avm_class.variables
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scope = avm_class.variables
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# I cannot find where static variables are initialized
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# so let's just return None
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if mname in scope:
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res = scope.get(mname)
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res = scope[mname]
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else:
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res = avm_class.constants[mname]
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stack.append(res)
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stack.append(res)
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elif opcode == 97: # setproperty
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elif opcode == 97: # setproperty
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index = u30()
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index = u30()
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