def read(self, addr=None):
if not self.__read:
raise MemoryProtectionError(
'Attempted to read from protected memory space: %s' % addr)
if addr is not None:
self.__check_addr(addr)
return ord(self.mem[addr])
return ord(self.mem.read(1))
def write(self, addr, byte=None):
if not self.__write:
raise MemoryProtectionError(
'Attempted to write to protected memory space: %s' % addr)
if byte is not None:
self.__check_addr(addr)
if isinstance(byte, int):
byte = chr(byte)
self.mem[addr] = byte
else:
if isinstance(addr, int):
addr = chr(addr)
self.mem.write(addr)
def clearblock(self, addr, size):
raise MemoryProtectionError('Unsupported operation by I/O map.')
def writeblock(self, addr, block):
raise MemoryProtectionError('Unsupported operation by I/O map.')
def fetch(self):
if not self.__execute:
raise MemoryProtectionError(
'Attempted to execute code from protected memory space!')
return ord(self.mem.read(1))
def mem_write(self, addr, byte):
raise MemoryProtectionError('Unable to write to memory address.')
def mem_read(self, addr):
try:
return ord(self.mem[addr])
except IndexError:
raise MemoryProtectionError('Unable to read from memory address.')