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mirror of synced 2024-11-24 06:20:12 +01:00

Clean up types on If statement, stop using strings to pass information.

This commit is contained in:
Jennifer Taylor 2021-04-24 19:36:58 +00:00
parent 534ab20f98
commit 964d6f082c
3 changed files with 52 additions and 33 deletions

View File

@ -1679,28 +1679,28 @@ class ByteCodeDecompiler(VerboseOutput):
stack: List[Any] = []
def make_if_expr(action: IfAction, negate: bool) -> IfExpr:
if action.comparison in ["IS UNDEFINED", "IS NOT UNDEFINED"]:
if action.comparison in [IfAction.IS_UNDEFINED, IfAction.IS_NOT_UNDEFINED]:
conditional = stack.pop()
return IsUndefinedIf(conditional, negate=negate != (action.comparison == "IS UNDEFINED"))
if action.comparison in ["IS TRUE", "IS FALSE"]:
return IsUndefinedIf(conditional, negate=negate != (action.comparison == IfAction.IS_UNDEFINED))
if action.comparison in [IfAction.IS_TRUE, IfAction.IS_FALSE]:
conditional = stack.pop()
return IsBooleanIf(conditional, negate=negate != (action.comparison == "IS FALSE"))
if action.comparison in ["==", "!="]:
return IsBooleanIf(conditional, negate=negate != (action.comparison == IfAction.IS_FALSE))
if action.comparison in [IfAction.EQUALS, IfAction.NOT_EQUALS]:
conditional2 = stack.pop()
conditional1 = stack.pop()
return IsEqualIf(conditional1, conditional2, negate=negate != (action.comparison == "!="))
if action.comparison in ["STRICT ==", "STRICT !="]:
return IsEqualIf(conditional1, conditional2, negate=negate != (action.comparison == IfAction.NOT_EQUALS))
if action.comparison in [IfAction.STRICT_EQUALS, IfAction.STRICT_NOT_EQUALS]:
conditional2 = stack.pop()
conditional1 = stack.pop()
return IsStrictEqualIf(conditional1, conditional2, negate=negate != (action.comparison == "STRICT !="))
if action.comparison in ["<", ">"]:
return IsStrictEqualIf(conditional1, conditional2, negate=negate != (action.comparison == IfAction.STRICT_NOT_EQUALS))
if action.comparison in [IfAction.LT, IfAction.GT]:
conditional2 = stack.pop()
conditional1 = stack.pop()
return MagnitudeIf(conditional1, conditional2, negate=negate != (action.comparison == "<"))
if action.comparison in ["<=", ">="]:
return MagnitudeIf(conditional1, conditional2, negate=negate != (action.comparison == IfAction.LT))
if action.comparison in [IfAction.LT_EQUALS, IfAction.GT_EQUALS]:
conditional2 = stack.pop()
conditional1 = stack.pop()
return MagnitudeEqualIf(conditional1, conditional2, negate=negate != (action.comparison == "<="))
return MagnitudeEqualIf(conditional1, conditional2, negate=negate != (action.comparison == IfAction.LT_EQUALS))
raise Exception(f"TODO: {action}")

View File

@ -768,30 +768,14 @@ class SWF(TrackedCoverage, VerboseOutput):
offset_ptr += 3
self.vprint(f"{prefix} {lineno}: Offset If True: {jump_if_true_offset}")
actions.append(IfAction(lineno, "IS TRUE", jump_if_true_offset))
actions.append(IfAction(lineno, IfAction.IS_TRUE, jump_if_true_offset))
elif opcode == AP2Action.IF2:
if2_type, jump_if_true_offset = struct.unpack(">Bh", datachunk[(offset_ptr + 1):(offset_ptr + 4)])
jump_if_true_offset += (lineno + 4)
offset_ptr += 4
if2_typestr = {
0: "==",
1: "!=",
2: "<",
3: ">",
4: "<=",
5: ">=",
6: "IS FALSE",
7: "BITAND",
8: "BITNOTAND",
9: "STRICT ==",
10: "STRICT !=",
11: "IS UNDEFINED",
12: "IS NOT UNDEFINED",
}[if2_type]
self.vprint(f"{prefix} {lineno}: {action_name} {if2_typestr}, Offset If True: {jump_if_true_offset}")
actions.append(IfAction(lineno, if2_typestr, jump_if_true_offset))
self.vprint(f"{prefix} {lineno}: {action_name} {IfAction.comparison_to_str(if2_type)}, Offset If True: {jump_if_true_offset}")
actions.append(IfAction(lineno, if2_type, jump_if_true_offset))
elif opcode == AP2Action.JUMP:
jump_offset = struct.unpack(">h", datachunk[(offset_ptr + 1):(offset_ptr + 3)])[0]
jump_offset += (lineno + 3)

View File

@ -2674,19 +2674,54 @@ class StoreRegisterAction(AP2Action):
class IfAction(AP2Action):
def __init__(self, offset: int, comparison: str, jump_if_true_offset: int) -> None:
EQUALS = 0
NOT_EQUALS = 1
LT = 2
GT = 3
LT_EQUALS = 4
GT_EQUALS = 5
IS_FALSE = 6
BITAND = 7
NOT_BITAND = 8
STRICT_EQUALS = 9
STRICT_NOT_EQUALS = 10
IS_UNDEFINED = 11
IS_NOT_UNDEFINED = 12
IS_TRUE = 1000
def __init__(self, offset: int, comparison: int, jump_if_true_offset: int) -> None:
super().__init__(offset, AP2Action.IF)
self.comparison = comparison
self.jump_if_true_offset = jump_if_true_offset
@classmethod
def comparison_to_str(cls, comparison: int) -> str:
return {
cls.EQUALS: "==",
cls.NOT_EQUALS: "!=",
cls.LT: "<",
cls.GT: ">",
cls.LT_EQUALS: "<=",
cls.GT_EQUALS: ">=",
cls.IS_FALSE: "IS FALSE",
cls.BITAND: "BITAND",
cls.NOT_BITAND: "BITNOTAND",
cls.STRICT_EQUALS: "STRICT ==",
cls.STRICT_NOT_EQUALS: "STRICT !=",
cls.IS_UNDEFINED: "IS UNDEFINED",
cls.IS_NOT_UNDEFINED: "IS NOT UNDEFINED",
cls.IS_TRUE: "IS TRUE",
}[comparison]
def as_dict(self, *args: Any, **kwargs: Any) -> Dict[str, Any]:
return {
**super().as_dict(*args, **kwargs),
'comparison': IfAction.comparison_to_str(self.comparison),
'jump_if_true_offset': self.jump_if_true_offset,
}
def __repr__(self) -> str:
return f"{self.offset}: {AP2Action.action_to_name(self.opcode)}, Comparison: {self.comparison}, Offset To Jump To If True: {self.jump_if_true_offset}"
return f"{self.offset}: {AP2Action.action_to_name(self.opcode)}, Comparison: {IfAction.comparison_to_str(self.comparison)}, Offset To Jump To If True: {self.jump_if_true_offset}"
class JumpAction(AP2Action):