def store(self, w_self, n0, w_val):
AbstractCachingShadow.store(self, w_self, n0, w_val)
if n0 == constants.CLASS_SUPERCLASS_INDEX:
self.store_w_superclass(w_val)
elif n0 == constants.CLASS_METHODDICT_INDEX:
self.store_w_methoddict(w_val)
elif n0 == constants.CLASS_FORMAT_INDEX:
# read and painfully decode the format
assert isinstance(w_val, model.W_SmallInteger)
classformat = self.space.unwrap_int(w_val)
# The classformat in Squeak, as an integer value, is:
# <2 bits=instSize//64><5 bits=cClass><4 bits=instSpec>
# <6 bits=instSize\\64><1 bit=0>
# In Slang the value is read directly as a boxed integer, so that
# the code gets a "pointer" whose bits are set as above, but
# shifted one bit to the left and with the lowest bit set to 1.
# Compute the instance size (really the size, not the number of bytes)
instsize_lo = (classformat >> 1) & 0x3F
instsize_hi = (classformat >> (9 + 1)) & 0xC0
self._instance_size = (instsize_lo
| instsize_hi) - 1 # subtract hdr
# decode the instSpec
format = (classformat >> 7) & 15
self.instance_varsized = format >= 2
# In case of raised exception below.
self.changed()
if format < 4:
self.instance_kind = POINTERS
elif format == 4:
self.instance_kind = WEAK_POINTERS
elif format == 6:
if self.space.w_Float.is_same_object(self.w_self()):
self.instance_kind = FLOAT
else:
self.instance_kind = WORDS
if self.instsize() != 0:
raise ClassShadowError(
"can't have both words and a non-zero "
"base instance size")
elif 8 <= format <= 11:
if self.space.w_LargePositiveInteger.is_same_object(
self.w_self()):
self.instance_kind = LARGE_POSITIVE_INTEGER
else:
self.instance_kind = BYTES
if self.instsize() != 0:
raise ClassShadowError(
"can't have both bytes and a non-zero "
"base instance size")
elif 12 <= format <= 15:
self.instance_kind = COMPILED_METHOD
else:
raise ClassShadowError("unknown format %d" % (format, ))
else:
if w_self.w_class == self.space.classtable["w_Metaclass"]:
# In case of Metaclasses, the "instance" class is stored in the last field.
if n0 == self.size(w_self) - 1 and isinstance(
w_val, model.W_PointersObject):
cl_shadow = w_val.as_class_get_shadow(self.space)
self.name = "%s class" % cl_shadow.getname()
else:
return
elif n0 == constants.CLASS_NAME_INDEX:
# In case of regular classes, the name is stored here.
self.store_w_name(w_val)
else:
return
# Some of the special info has changed -> Switch version.
self.changed()
def __init__(self, space, w_self, size):
self.subclass_s = {}
AbstractCachingShadow.__init__(self, space, w_self, size)
def __init__(self, space, w_self, size):
AbstractCachingShadow.__init__(self, space, w_self, size)
self.invalid = False
def __init__(self, space, w_self, size):
AbstractCachingShadow.__init__(self, space, w_self, size)
self.invalid = False
def store(self, n0, w_val):
AbstractCachingShadow.store(self, n0, w_val)
if n0 == constants.CLASS_SUPERCLASS_INDEX:
self.store_w_superclass(w_val)
elif n0 == constants.CLASS_METHODDICT_INDEX:
self.store_w_methoddict(w_val)
elif n0 == constants.CLASS_FORMAT_INDEX:
# read and painfully decode the format
assert isinstance(w_val, model.W_SmallInteger)
classformat = self.space.unwrap_int(w_val)
# The classformat in Squeak, as an integer value, is:
# <2 bits=instSize//64><5 bits=cClass><4 bits=instSpec>
# <6 bits=instSize\\64><1 bit=0>
# In Slang the value is read directly as a boxed integer, so that
# the code gets a "pointer" whose bits are set as above, but
# shifted one bit to the left and with the lowest bit set to 1.
# Compute the instance size (really the size, not the number of bytes)
instsize_lo = (classformat >> 1) & 0x3F
instsize_hi = (classformat >> (9 + 1)) & 0xC0
self._instance_size = (instsize_lo | instsize_hi) - 1 # subtract hdr
# decode the instSpec
format = (classformat >> 7) & 15
self.instance_varsized = format >= 2
# In case of raised exception below.
self.changed()
if format < 4:
self.instance_kind = POINTERS
elif format == 4:
self.instance_kind = WEAK_POINTERS
elif format == 6:
if self.space.w_Float.is_same_object(self.w_self()):
self.instance_kind = FLOAT
else:
self.instance_kind = WORDS
if self.instsize() != 0:
raise ClassShadowError("can't have both words and a non-zero "
"base instance size")
elif 8 <= format <= 11:
if self.space.w_LargePositiveInteger.is_same_object(self.w_self()):
self.instance_kind = LARGE_POSITIVE_INTEGER
else:
self.instance_kind = BYTES
if self.instsize() != 0:
raise ClassShadowError("can't have both bytes and a non-zero "
"base instance size")
elif 12 <= format <= 15:
self.instance_kind = COMPILED_METHOD
else:
raise ClassShadowError("unknown format %d" % (format,))
else:
if self._w_self.w_class == self.space.classtable["w_Metaclass"]:
# In case of Metaclasses, the "instance" class is stored in the last field.
if n0 == self.size() - 1 and isinstance(w_val, model.W_PointersObject):
cl_shadow = w_val.as_class_get_shadow(self.space)
self.name = "%s class" % cl_shadow.getname()
else:
return
elif n0 == constants.CLASS_NAME_INDEX:
# In case of regular classes, the name is stored here.
self.store_w_name(w_val)
else:
return
# Some of the special info has changed -> Switch version.
self.changed()
def __init__(self, space, w_self, size):
self.subclass_s = {}
AbstractCachingShadow.__init__(self, space, w_self, size)
