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authorOle Troan <ot@cisco.com>2018-11-28 11:36:05 +0100
committerNeale Ranns <nranns@cisco.com>2018-12-13 12:11:50 +0000
commit413f4a5b2123c1625d615315db293a080078482b (patch)
tree6cfd8376c1d84b93793b062731ec9594487dc95e /src/vpp-api/python/vpp_papi/vpp_serializer.py
parent6f666ad99ae1e384aa851af5e0feed3d2a25e709 (diff)
API: Use string type instead of u8.
The new string type is modelled after string in proto3. It is always variable length. Change-Id: I64884067e28a80072c8dac31b7c7c82d6e306051 Signed-off-by: Ole Troan <ot@cisco.com> Signed-off-by: Michal Cmarada <mcmarada@cisco.com> Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'src/vpp-api/python/vpp_papi/vpp_serializer.py')
-rw-r--r--src/vpp-api/python/vpp_papi/vpp_serializer.py48
1 files changed, 36 insertions, 12 deletions
diff --git a/src/vpp-api/python/vpp_papi/vpp_serializer.py b/src/vpp-api/python/vpp_papi/vpp_serializer.py
index 5dce03b6188..418c0243402 100644
--- a/src/vpp-api/python/vpp_papi/vpp_serializer.py
+++ b/src/vpp-api/python/vpp_papi/vpp_serializer.py
@@ -59,6 +59,7 @@ def conversion_unpacker(data, field_type):
class BaseTypes(object):
def __init__(self, type, elements=0):
base_types = {'u8': '>B',
+ 'string': '>s',
'u16': '>H',
'u32': '>I',
'i32': '>i',
@@ -67,13 +68,11 @@ class BaseTypes(object):
'bool': '>?',
'header': '>HI'}
- if elements > 0 and type == 'u8':
+ if elements > 0 and (type == 'u8' or type == 'string'):
self.packer = struct.Struct('>%ss' % elements)
else:
self.packer = struct.Struct(base_types[type])
self.size = self.packer.size
- logger.debug('Adding {} with format: {}'
- .format(type, base_types[type]))
def pack(self, data, kwargs=None):
if not data: # Default to zero if not specified
@@ -84,10 +83,32 @@ class BaseTypes(object):
return self.packer.unpack_from(data, offset)[0], self.packer.size
+class String(object):
+ def __init__(self):
+ self.name = 'string'
+ self.size = 1
+ self.length_field_packer = BaseTypes('u32')
+
+ def pack(self, list, kwargs=None):
+ if not list:
+ return self.length_field_packer.pack(0) + b""
+ return self.length_field_packer.pack(len(list)) + list.encode('utf8')
+
+ def unpack(self, data, offset=0, result=None, ntc=False):
+ length, length_field_size = self.length_field_packer.unpack(data,
+ offset)
+ if length == 0:
+ return b'', 0
+ p = BaseTypes('u8', length)
+ x, size = p.unpack(data, offset + length_field_size)
+ x2 = x.split(b'\0',1)[0]
+ return (x2.decode('utf8'), size + length_field_size)
+
+
types = {'u8': BaseTypes('u8'), 'u16': BaseTypes('u16'),
'u32': BaseTypes('u32'), 'i32': BaseTypes('i32'),
'u64': BaseTypes('u64'), 'f64': BaseTypes('f64'),
- 'bool': BaseTypes('bool')}
+ 'bool': BaseTypes('bool'), 'string': String()}
def vpp_get_type(name):
@@ -107,6 +128,7 @@ class FixedList_u8(object):
self.num = num
self.packer = BaseTypes(field_type, num)
self.size = self.packer.size
+ self.field_type = field_type
def pack(self, data, kwargs=None):
"""Packs a fixed length bytestring. Left-pads with zeros
@@ -128,6 +150,10 @@ class FixedList_u8(object):
'Invalid array length for "{}" got {}'
' expected {}'
.format(self.name, len(data[offset:]), self.num))
+ if self.field_type == 'string':
+ s = self.packer.unpack(data, offset)
+ s2 = s[0].split(b'\0', 1)[0]
+ return (s2.decode('utf-8'), self.num)
return self.packer.unpack(data, offset)
@@ -164,6 +190,7 @@ class FixedList(object):
class VLAList(object):
def __init__(self, name, field_type, len_field_name, index):
self.name = name
+ self.field_type = field_type
self.index = index
self.packer = types[field_type]
self.size = self.packer.size
@@ -179,6 +206,7 @@ class VLAList(object):
b = bytes()
# u8 array
+
if self.packer.size == 1:
return bytearray(list)
@@ -249,7 +277,6 @@ class VPPEnumType(object):
e_hash[ename] = evalue
self.enum = IntEnum(name, e_hash)
types[name] = self
- logger.debug('Adding enum {}'.format(name))
def __getattr__(self, name):
return self.enum[name]
@@ -290,7 +317,6 @@ class VPPUnionType(object):
types[name] = self
self.tuple = collections.namedtuple(name, fields, rename=True)
- logger.debug('Adding union {}'.format(name))
# Union of variable length?
def pack(self, data, kwargs=None):
@@ -381,7 +407,7 @@ class VPPType(object):
if list_elements == 0:
p = VLAList_legacy(f_name, f_type)
self.packers.append(p)
- elif f_type == 'u8':
+ elif f_type == 'u8' or f_type == 'string':
p = FixedList_u8(f_name, f_type, list_elements)
self.packers.append(p)
size += p.size
@@ -390,10 +416,9 @@ class VPPType(object):
self.packers.append(p)
size += p.size
elif len(f) == 4: # Variable length list
- # Find index of length field
- length_index = self.fields.index(f[3])
- p = VLAList(f_name, f_type, f[3], length_index)
- self.packers.append(p)
+ length_index = self.fields.index(f[3])
+ p = VLAList(f_name, f_type, f[3], length_index)
+ self.packers.append(p)
else:
self.packers.append(types[f_type])
size += types[f_type].size
@@ -401,7 +426,6 @@ class VPPType(object):
self.size = size
self.tuple = collections.namedtuple(name, self.fields, rename=True)
types[name] = self
- logger.debug('Adding type {}'.format(name))
def pack(self, data, kwargs=None):
if not kwargs: