def unwrap_char(self, space):
w_class = self.getclass(space)
if not w_class.is_same_object(space.w_Character):
raise error.UnwrappingError("expected Character")
w_ord = self.fetch(space, constants.CHARACTER_VALUE_INDEX)
if not isinstance(w_ord, W_SmallInteger):
raise error.UnwrappingError("expected SmallInteger from Character")
return chr(w_ord.value)
def unwrap_uint(self, space):
if not self.getclass(space).is_same_object(
space.w_LargePositiveInteger):
raise error.UnwrappingError(
"Invalid class for unwrapping byte object as uint")
if self.size() > constants.BYTES_PER_MACHINE_INT:
raise error.UnwrappingError("Too large to convert bytes to word")
word = r_uint(0)
for i in range(self.size()):
word += r_uint(ord(self.getchar(i))) << 8 * i
return word
def unwrap_int64(self, space):
if self.size() > constants.BYTES_PER_MACHINE_LONGLONG:
raise error.UnwrappingError("Too large to convert bytes to word")
elif (self.size() == constants.BYTES_PER_MACHINE_LONGLONG
and ord(self.getchar(constants.BYTES_PER_MACHINE_LONGLONG - 1))
>= 0x80):
# Sign-bit is set, this will overflow
raise error.UnwrappingError("Too large to convert bytes to word")
word = r_int64(0)
for i in range(self.size()):
try:
word += r_int64(ord(self.getchar(i))) << 8 * i
except OverflowError: # never raised after translation :(
raise error.UnwrappingError(
"Too large to convert bytes to word")
if self.getclass(space).is_same_object(space.w_LargePositiveInteger):
return word
elif self.getclass(space).is_same_object(space.w_LargeNegativeInteger):
return -word
else:
raise error.UnwrappingError
def unwrap_rbigint(self, space):
raise error.UnwrappingError("Got unexpected class unwrap_rbigint")
def unwrap_int64(self, space):
raise error.UnwrappingError("Got unexpected class unwrap_int64")
def is_positive(self, space):
raise error.UnwrappingError("Got unexpected class in is_positive")