def convert_bitfield_from_object(self, cdata, w_ob):
ctype = self.ctype
space = ctype.space
#
value = misc.as_long_long(space, w_ob)
if isinstance(ctype, ctypeprim.W_CTypePrimitiveSigned):
is_signed = True
fmin = -(r_longlong(1) << (self.bitsize - 1))
fmax = (r_longlong(1) << (self.bitsize - 1)) - 1
if fmax == 0:
fmax = 1 # special case to let "int x:1" receive "1"
else:
is_signed = False
fmin = r_longlong(0)
fmax = r_longlong((r_ulonglong(1) << self.bitsize) - 1)
if value < fmin or value > fmax:
raise oefmt(
space.w_OverflowError,
"value %d outside the range allowed by the bit field "
"width: %d <= x <= %d", value, fmin, fmax)
rawmask = ((r_ulonglong(1) << self.bitsize) - 1) << self.bitshift
rawvalue = r_ulonglong(value) << self.bitshift
rawfielddata = misc.read_raw_unsigned_data(cdata, ctype.size)
rawfielddata = (rawfielddata & ~rawmask) | (rawvalue & rawmask)
if is_signed:
misc.write_raw_signed_data(cdata, rawfielddata, ctype.size)
else:
misc.write_raw_unsigned_data(cdata, rawfielddata, ctype.size)
def convert_bitfield_from_object(self, cdata, w_ob):
ctype = self.ctype
space = ctype.space
#
value = misc.as_long_long(space, w_ob)
if isinstance(ctype, ctypeprim.W_CTypePrimitiveSigned):
is_signed = True
fmin = -(r_longlong(1) << (self.bitsize - 1))
fmax = (r_longlong(1) << (self.bitsize - 1)) - 1
if fmax == 0:
fmax = 1 # special case to let "int x:1" receive "1"
else:
is_signed = False
fmin = r_longlong(0)
fmax = r_longlong((r_ulonglong(1) << self.bitsize) - 1)
if value < fmin or value > fmax:
raise oefmt(space.w_OverflowError,
"value %d outside the range allowed by the bit field "
"width: %d <= x <= %d", value, fmin, fmax)
rawmask = ((r_ulonglong(1) << self.bitsize) - 1) << self.bitshift
rawvalue = r_ulonglong(value) << self.bitshift
rawfielddata = misc.read_raw_unsigned_data(cdata, ctype.size)
rawfielddata = (rawfielddata & ~rawmask) | (rawvalue & rawmask)
if is_signed:
misc.write_raw_signed_data(cdata, rawfielddata, ctype.size)
else:
misc.write_raw_unsigned_data(cdata, rawfielddata, ctype.size)
def convert_from_object(self, cdata, w_ob):
if self.value_fits_long:
value = misc.as_long(self.space, w_ob)
if self.size < rffi.sizeof(lltype.Signed):
if r_uint(value) - self.vmin > self.vrangemax:
self._overflow(w_ob)
misc.write_raw_signed_data(cdata, value, self.size)
else:
value = misc.as_long_long(self.space, w_ob)
misc.write_raw_signed_data(cdata, value, self.size)
def _convert_from_object_longlong(self, cdata, w_ob):
# in its own function: LONGLONG may make the whole function jit-opaque
value = misc.as_long_long(self.space, w_ob)
misc.write_raw_signed_data(cdata, value, self.size)
