diff options
Diffstat (limited to 'src/vpp-api/python/vpp_papi')
| -rw-r--r-- | src/vpp-api/python/vpp_papi/vpp_serializer.py | 81 |
1 files changed, 63 insertions, 18 deletions
diff --git a/src/vpp-api/python/vpp_papi/vpp_serializer.py b/src/vpp-api/python/vpp_papi/vpp_serializer.py index b04530cd8a9..8361cd3c266 100644 --- a/src/vpp-api/python/vpp_papi/vpp_serializer.py +++ b/src/vpp-api/python/vpp_papi/vpp_serializer.py @@ -66,7 +66,32 @@ def conversion_unpacker(data, field_type): 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', @@ -99,8 +124,12 @@ class BaseTypes(object): 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 @@ -150,6 +179,7 @@ types = {'u8': BaseTypes('u8'), 'u16': BaseTypes('u16'), class_types = {} + def vpp_get_type(name): try: return types[name] @@ -161,7 +191,7 @@ class VPPSerializerValueError(ValueError): pass -class FixedList_u8(object): +class FixedList_u8(Packer): def __init__(self, name, field_type, num): self.name = name self.num = num @@ -187,6 +217,7 @@ class FixedList_u8(object): 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: raise VPPSerializerValueError( @@ -196,7 +227,7 @@ class FixedList_u8(object): 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] @@ -226,7 +257,7 @@ class FixedList(object): 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 @@ -274,7 +305,7 @@ class VLAList(object): 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 @@ -304,7 +335,7 @@ class VLAList_legacy(): return r, total -class VPPEnumType(object): +class VPPEnumType(Packer): def __init__(self, name, msgdef, options=None): self.size = types['u32'].size self.name = name @@ -330,6 +361,7 @@ class VPPEnumType(object): def __bool__(self): return True + # TODO: Remove post 20.01. if sys.version[0] == '2': __nonzero__ = __bool__ @@ -346,8 +378,12 @@ class VPPEnumType(object): 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 @@ -397,9 +433,10 @@ class VPPUnionType(object): 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'])) @@ -418,6 +455,7 @@ class VPPTypeAlias(object): types[name] = self self.toplevelconversion = False + self.options = options def pack(self, data, kwargs=None): if data and conversion_required(data, self.name): @@ -426,11 +464,20 @@ class VPPTypeAlias(object): # 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 @@ -441,7 +488,7 @@ class VPPTypeAlias(object): 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 @@ -496,14 +543,12 @@ class VPPType(object): p = VLAList(f_name, f_type, f[3], length_index) self.packers.append(p) else: - # Support default for basetypes and enums + # default support for types that decay to basetype if 'default' in self.options: - try: - p = BaseTypes(f_type, 0, self.options) - except KeyError: - p = class_types[f_type](f_name, types[f_type].msgdef, self.options) + p = self.get_packer_with_options(f_type, self.options) else: p = types[f_type] + self.packers.append(p) size += p.size @@ -545,7 +590,7 @@ class VPPType(object): # 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 |