Cool_Tools/bemaniutils
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mirror of synced 2024-11-24 06:20:12 +01:00
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Implement a few more opcodes, fix stack ordering with multiple entries after reconciliation.

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This commit is contained in:
Jennifer Taylor 2021-05-04 02:32:32 +00:00
parent eddb8dc208
commit 83f4f43e9e
1 changed files with 45 additions and 3 deletions
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48
bemani/format/afp/decompile.py
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@ -16,6 +16,9 @@ from .types import (
StoreRegisterAction,
DefineFunction2Action,
GotoFrame2Action,
WithAction,
GetURL2Action,
StartDragAction,
UNDEFINED,
GLOBAL,
)
@ -2252,6 +2255,21 @@ class ByteCodeDecompiler(VerboseOutput):
chunk.actions[i] = make_if_expr(action)
continue
if isinstance(action, WithAction):
# TODO: I have to figure out what "with" actually even does.
# It sets some context and local variables, but to what?
raise Exception(f"TODO: {action}")
if isinstance(action, GetURL2Action):
# TODO: I have to figure out what "geturl2" actually even does.
# It is something to do with getting the "URL" of the current
# movie clip.
raise Exception(f"TODO: {action}")
if isinstance(action, StartDragAction):
# TODO: I have to implement this, if I ever come across it.
raise Exception(f"TODO: {action}")
if isinstance(action, AddNumVariableAction):
variable_name = stack.pop()
if not isinstance(variable_name, (str, StringConstant)):
@ -2467,7 +2485,7 @@ class ByteCodeDecompiler(VerboseOutput):
set_value = stack.pop()
local_name = stack.pop()
if not isinstance(local_name, (str, StringConstant)):
raise Exception("Logic error!")
raise Exception(f"Logic error, local name {local_name} is not a string!")
chunk.actions[i] = SetLocalStatement(local_name, set_value)
continue
@ -2475,7 +2493,7 @@ class ByteCodeDecompiler(VerboseOutput):
if action.opcode == AP2Action.DEFINE_LOCAL2:
local_name = stack.pop()
if not isinstance(local_name, (str, StringConstant)):
raise Exception("Logic error!")
raise Exception(f"Logic error, local name {local_name} is not a string!")
# TODO: Should this be NULL?
chunk.actions[i] = SetLocalStatement(local_name, UNDEFINED)
@ -2595,6 +2613,30 @@ class ByteCodeDecompiler(VerboseOutput):
chunk.actions[i] = NopStatement()
continue
if action.opcode == AP2Action.STRICT_EQUALS:
expr2 = stack.pop()
expr1 = stack.pop()
stack.append(ArithmeticExpression(expr1, "===", expr2))
chunk.actions[i] = NopStatement()
continue
if action.opcode == AP2Action.GREATER:
expr2 = stack.pop()
expr1 = stack.pop()
stack.append(ArithmeticExpression(expr1, ">", expr2))
chunk.actions[i] = NopStatement()
continue
if action.opcode == AP2Action.LESS2:
expr2 = stack.pop()
expr1 = stack.pop()
stack.append(ArithmeticExpression(expr1, "<", expr2))
chunk.actions[i] = NopStatement()
continue
if action.opcode == AP2Action.PUSH_DUPLICATE:
# TODO: This might benefit from generating a temp variable assignment
# and pushing that onto the stack twice, instead of whatever's on the stack.
@ -2774,7 +2816,7 @@ class ByteCodeDecompiler(VerboseOutput):
stack.append(new_entry)
self.vprint(f"Redefining stack for chunk ID {new_stack_id} to be {stack} after merging multiple paths")
stacks[new_stack_id] = stack
stacks[new_stack_id] = stack[::-1]
return definitions
else:
self.vprint(f"Defining stack for chunk ID {new_stack_id} to be {new_stack} based on evaluation of {cur_chunk}")