return vpp_format.conversion_unpacker_table[field_type](data)
-class BaseTypes(object):
+# TODO: post 20.01, remove inherit from object.
+class Packer(object):
+ options = {}
+
+ def pack(self, data, kwargs):
+ raise NotImplementedError
+
+ def unpack(self, data, offset, result=None, ntc=False):
+ raise NotImplementedError
+
+ # override as appropriate in subclasses
+ def _get_packer_with_options(self, f_type, options):
+ return types[f_type]
+
+ def get_packer_with_options(self, f_type, options):
+ if options is not None:
+ try:
+ return self._get_packer_with_options(f_type, options)
+ except IndexError:
+ raise VPPSerializerValueError(
+ "Options not supported for {}{} ({})".
+ format(f_type, types[f_type].__class__,
+ options))
+
+
+class BaseTypes(Packer):
def __init__(self, type, elements=0, options=None):
base_types = {'u8': '>B',
'i8': '>b',
self.size = self.packer.size
self.options = options
- def __call__(self, args):
- self.options = args
- return self
-
def pack(self, data, kwargs=None):
- if not data: # Default to zero if not specified
+ if data is None: # Default to zero if not specified
if self.options and 'default' in self.options:
data = self.options['default']
else:
def unpack(self, data, offset, result=None, ntc=False):
return self.packer.unpack_from(data, offset)[0], self.packer.size
+ def _get_packer_with_options(self, f_type, options):
+ c = types[f_type].__class__
+ return c(f_type, options=options)
+
-class String(object):
+class String(Packer):
def __init__(self, name, num, options):
self.name = name
self.num = num
'u64': BaseTypes('u64'), 'f64': BaseTypes('f64'),
'bool': BaseTypes('bool'), 'string': String}
+class_types = {}
+
def vpp_get_type(name):
try:
pass
-class FixedList_u8(object):
+class FixedList_u8(Packer):
def __init__(self, name, field_type, num):
self.name = name
self.num = num
self.size = self.packer.size
self.field_type = field_type
- def __call__(self, args):
- self.options = args
- return self
-
def pack(self, data, kwargs=None):
"""Packs a fixed length bytestring. Left-pads with zeros
if input data is too short."""
' expected: {}'
.format(self.name, len(data), self.num))
- return self.packer.pack(data)
+ try:
+ return self.packer.pack(data)
+ except struct.error:
+ raise VPPSerializerValueError(
+ 'Packing failed for "{}" {}'
+ .format(self.name, kwargs))
def unpack(self, data, offset=0, result=None, ntc=False):
if len(data[offset:]) < self.num:
return self.packer.unpack(data, offset)
-class FixedList(object):
+class FixedList(Packer):
def __init__(self, name, field_type, num):
self.num = num
self.packer = types[field_type]
self.name = name
self.field_type = field_type
- def __call__(self, args):
- self.options = args
- return self
-
def pack(self, list, kwargs):
if len(list) != self.num:
raise VPPSerializerValueError(
return result, total
-class VLAList(object):
+class VLAList(Packer):
def __init__(self, name, field_type, len_field_name, index):
self.name = name
self.field_type = field_type
self.size = self.packer.size
self.length_field = len_field_name
- def __call__(self, args):
- self.options = args
- return self
-
- def pack(self, list, kwargs=None):
- if not list:
+ def pack(self, lst, kwargs=None):
+ if not lst:
return b""
- if len(list) != kwargs[self.length_field]:
+ if len(lst) != kwargs[self.length_field]:
raise VPPSerializerValueError(
'Variable length error, got: {} expected: {}'
- .format(len(list), kwargs[self.length_field]))
- b = bytes()
+ .format(len(lst), kwargs[self.length_field]))
# u8 array
-
if self.packer.size == 1:
- return bytearray(list)
+ if isinstance(lst, list):
+ return b''.join(lst)
+ return bytes(lst)
- for e in list:
+ b = bytes()
+ for e in lst:
b += self.packer.pack(e)
return b
return r, total
-class VLAList_legacy():
+class VLAList_legacy(Packer):
def __init__(self, name, field_type):
self.packer = types[field_type]
self.size = self.packer.size
- def __call__(self, args):
- self.options = args
- return self
-
def pack(self, list, kwargs=None):
if self.packer.size == 1:
return bytes(list)
return r, total
-class VPPEnumType(object):
- def __init__(self, name, msgdef):
+class VPPEnumType(Packer):
+ def __init__(self, name, msgdef, options=None):
self.size = types['u32'].size
+ self.name = name
self.enumtype = 'u32'
+ self.msgdef = msgdef
e_hash = {}
for f in msgdef:
if type(f) is dict and 'enumtype' in f:
e_hash[ename] = evalue
self.enum = IntFlag(name, e_hash)
types[name] = self
-
- def __call__(self, args):
- self.options = args
- return self
+ class_types[name] = VPPEnumType
+ self.options = options
def __getattr__(self, name):
return self.enum[name]
def __bool__(self):
return True
+ # TODO: Remove post 20.01.
if sys.version[0] == '2':
__nonzero__ = __bool__
def pack(self, data, kwargs=None):
+ if data is None: # Default to zero if not specified
+ if self.options and 'default' in self.options:
+ data = self.options['default']
+ else:
+ data = 0
+
return types[self.enumtype].pack(data)
def unpack(self, data, offset=0, result=None, ntc=False):
x, size = types[self.enumtype].unpack(data, offset)
return self.enum(x), size
+ def _get_packer_with_options(self, f_type, options):
+ c = types[f_type].__class__
+ return c(f_type, types[f_type].msgdef, options=options)
+
-class VPPUnionType(object):
+class VPPUnionType(Packer):
def __init__(self, name, msgdef):
self.name = name
self.size = 0
types[name] = self
self.tuple = collections.namedtuple(name, fields, rename=True)
- def __call__(self, args):
- self.options = args
- return self
-
# Union of variable length?
def pack(self, data, kwargs=None):
if not data:
return self.tuple._make(r), maxsize
-class VPPTypeAlias(object):
- def __init__(self, name, msgdef):
+class VPPTypeAlias(Packer):
+ def __init__(self, name, msgdef, options=None):
self.name = name
+ self.msgdef = msgdef
t = vpp_get_type(msgdef['type'])
if not t:
raise ValueError('No such type: {}'.format(msgdef['type']))
types[name] = self
self.toplevelconversion = False
-
- def __call__(self, args):
- self.options = args
- return self
+ self.options = options
def pack(self, data, kwargs=None):
if data and conversion_required(data, self.name):
# Python 2 and 3 raises different exceptions from inet_pton
except(OSError, socket.error, TypeError):
pass
+ if data is None: # Default to zero if not specified
+ if self.options and 'default' in self.options:
+ data = self.options['default']
+ else:
+ data = 0
return self.packer.pack(data, kwargs)
+ def _get_packer_with_options(self, f_type, options):
+ c = types[f_type].__class__
+ return c(f_type, types[f_type].msgdef, options=options)
+
def unpack(self, data, offset=0, result=None, ntc=False):
- if ntc == False and self.name in vpp_format.conversion_unpacker_table:
+ if ntc is False and self.name in vpp_format.conversion_unpacker_table:
# Disable type conversion for dependent types
ntc = True
self.toplevelconversion = True
return t, size
-class VPPType(object):
+class VPPType(Packer):
# Set everything up to be able to pack / unpack
def __init__(self, name, msgdef):
self.name = name
p = VLAList(f_name, f_type, f[3], length_index)
self.packers.append(p)
else:
- p = types[f_type](self.options)
+ # default support for types that decay to basetype
+ if 'default' in self.options:
+ p = self.get_packer_with_options(f_type, self.options)
+ else:
+ p = types[f_type]
+
self.packers.append(p)
size += p.size
types[name] = self
self.toplevelconversion = False
- def __call__(self, args):
- self.options = args
- return self
-
def pack(self, data, kwargs=None):
if not kwargs:
kwargs = data
# Return a list of arguments
result = []
total = 0
- if ntc == False and self.name in vpp_format.conversion_unpacker_table:
+ if ntc is False and self.name in vpp_format.conversion_unpacker_table:
# Disable type conversion for dependent types
ntc = True
self.toplevelconversion = True
Code Review / vpp.git / blobdiff