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- Fix __setitem__() to allow callback to change memory.

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- Don't allow same callback to be registered twice on an address.
This commit is contained in:
Mike Naberezny 2009-04-04 23:06:02 -07:00
parent fac1c257b3
commit e2a4f1fb8a
1 changed files with 14 additions and 11 deletions
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25
src/py65/memory.py
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@ -15,7 +15,8 @@ class ObservableMemory:
result = callback(address, value)
if result is not None:
value = result
self._subject[address] = value
def __getitem__(self, address):
callbacks = self._providers[address]
final_result = None
@ -25,21 +26,23 @@ class ObservableMemory:
if result is not None:
final_result = result
if final_result:
return final_result
else:
if final_result is None:
return self._subject[address]
else:
return final_result
def __getattr__(self, address):
return getattr(self._subject, address)
def register_provider(self, address_range, callback):
for address in address_range:
self._providers[address].append(callback)
def __getattr__(self, attribute):
return getattr(self._subject, attribute)
def register_listener(self, address_range, callback):
for address in address_range:
self._listeners[address].append(callback)
if not callback in self._listeners[address]:
self._listeners[address].append(callback)
def register_provider(self, address_range, callback):
for address in address_range:
if not callback in self._providers[address]:
self._providers[address].append(callback)
def write(self, start_address, bytes):
self._subject[start_address:start_address+len(bytes)] = bytes