def encode_enum(self, obj):
# empty enum
if len(obj._cont) == 0:
obj._msg = BER_TLV(self.get_name())
return
# get the maximum integer value to know the length on which to encode
if isinstance(self._ENC_ENUM_LEN, (int, long)) \
and self._ENC_ENUM_LEN % 8 == 0:
# encoder forcing ENUMERATED length
bit_len = abs(self._ENC_ENUM_LEN)
else:
# minimum byte length for ENUMERATED
bit_len = 1 + len_bits(max(obj._cont.values()))
miss_len = bit_len % 8
if miss_len != 0:
bit_len += 8 - miss_len
# and get the identifier integer value from the string value
V = Int('V', Pt=obj._cont[obj._val], Type='int%s'%bit_len,
Repr=self._REPR_ENUM)
if self._ENUM_BUILD_DICT:
V.Dict = dict([(i[1], i[0]) for i in obj._cont.items()])
#
obj._msg = BER_TLV(obj.get_name())
obj._msg.set(V)
self.handle_tag_enc(obj)
def encode_enum(self, obj):
# empty enum
if len(obj._cont) == 0:
obj._msg = BER_TLV(self.get_name())
return
# get the maximum integer value to know the length on which to encode
if isinstance(self._ENC_ENUM_LEN, (int, long)) \
and self._ENC_ENUM_LEN % 8 == 0:
# encoder forcing ENUMERATED length
bit_len = abs(self._ENC_ENUM_LEN)
else:
# minimum byte length for ENUMERATED
bit_len = 1 + len_bits(max(obj._cont.values()))
miss_len = bit_len % 8
if miss_len != 0:
bit_len += 8 - miss_len
# and get the identifier integer value from the string value
V = Int('V',
Pt=obj._cont[obj._val],
Type='int%s' % bit_len,
Repr=self._REPR_ENUM)
if self._ENUM_BUILD_DICT:
V.Dict = dict([(i[1], i[0]) for i in obj._cont.items()])
#
obj._msg = BER_TLV(obj.get_name())
obj._msg.set(V)
self.handle_tag_enc(obj)
def decode_enum_val(self, obj):
tlv = self.handle_tag_dec(obj)
# map to an Int, given the length of the value part
bit_len = tlv[1]()*8
if bit_len:
V = Int('V', Type='int%s'%bit_len, Repr=self._REPR_ENUM)
V.map(str(tlv[2]))
if self._ENUM_BUILD_TYPE:
V.Dict = dict([(i[1], i[0]) for i in obj._cont.items()])
tlv.set(V)
#
val_int = V()
enum_int = obj._cont.values()
if val_int in enum_int:
obj._val = obj._cont.keys()[enum_int.index(val_int)]
elif obj._ext is not None:
# if extended index value is unknown,
# the decoded value cannot be retrieved
# WNG: we put a dummy string here as value
obj._val = '_ext_%i' % val_int
elif self._SAFE:
raise(ASN1_BER_DECODER('%s: invalid ENUMERATED identifier %s' \
% (obj.get_fullname(), val_int)))
def decode_enum_val(self, obj):
tlv = self.handle_tag_dec(obj)
# map to an Int, given the length of the value part
bit_len = tlv[1]() * 8
if bit_len:
V = Int('V', Type='int%s' % bit_len, Repr=self._REPR_ENUM)
V.map(str(tlv[2]))
if self._ENUM_BUILD_TYPE:
V.Dict = dict([(i[1], i[0]) for i in obj._cont.items()])
tlv.set(V)
#
val_int = V()
enum_int = obj._cont.values()
if val_int in enum_int:
obj._val = obj._cont.keys()[enum_int.index(val_int)]
elif obj._ext is not None:
# if extended index value is unknown,
# the decoded value cannot be retrieved
# WNG: we put a dummy string here as value
obj._val = '_ext_%i' % val_int
elif self._SAFE:
raise(ASN1_BER_DECODER('%s: invalid ENUMERATED identifier %s' \
% (obj.get_fullname(), val_int)))