Added serialization and deserialization for signed integers

diff --git a/serial/binary.py b/serial/binary.py
index c4693db..d362092 100644 (file)
--- a/serial/binary.py
+++ b/serial/binary.py
@@ -10,6 +10,10 @@ TAG_UINT8 = 0x03
 TAG_UINT16 = 0x04
 TAG_UINT32 = 0x05
 TAG_UINT64 = 0x06
+TAG_INT8 = 0x10
+TAG_INT16 = 0x11
+TAG_INT32 = 0x12
+TAG_INT64 = 0x13
 
 TaggedObject = collections.namedtuple(
     'TaggedObject',
@@ -45,6 +49,10 @@ _TAGS_TO_SERIALIZERS = {
     TAG_UINT16: _make_struct_serializer('H'),
     TAG_UINT32: _make_struct_serializer('I'),
     TAG_UINT64: _make_struct_serializer('Q'),
+    TAG_INT8: _make_struct_serializer('b'),
+    TAG_INT16: _make_struct_serializer('h'),
+    TAG_INT32: _make_struct_serializer('i'),
+    TAG_INT64: _make_struct_serializer('q'),
 }
 
 def serialize(to):
@@ -76,6 +84,10 @@ _TAGS_TO_PARSERS = {
     TAG_UINT16: _make_struct_deserializer(TAG_UINT16, 'H'),
     TAG_UINT32: _make_struct_deserializer(TAG_UINT32, 'I'),
     TAG_UINT64: _make_struct_deserializer(TAG_UINT64, 'Q'),
+    TAG_INT8: _make_struct_deserializer(TAG_INT8, 'b'),
+    TAG_INT16: _make_struct_deserializer(TAG_INT16, 'h'),
+    TAG_INT32: _make_struct_deserializer(TAG_INT32, 'i'),
+    TAG_INT64: _make_struct_deserializer(TAG_INT64, 'q'),
 }
 
 def deserialize(b):

diff --git a/serial/test_binary.py b/serial/test_binary.py
index e72447f..0463dda 100644 (file)
--- a/serial/test_binary.py
+++ b/serial/test_binary.py
@@ -10,6 +10,18 @@ EXAMPLE_REPRESENTATIONS = [
     (binary.TAG_UINT16, 7, b'\x04\x00\x07'),
     (binary.TAG_UINT32, 7, b'\x05\x00\x00\x00\x07'),
     (binary.TAG_UINT64, 7, b'\x06\x00\x00\x00\x00\x00\x00\x00\x07'),
+    (binary.TAG_INT8, 7, b'\x10\x07'),
+    (binary.TAG_INT16, 7, b'\x11\x00\x07'),
+    (binary.TAG_INT32, 7, b'\x12\x00\x00\x00\x07'),
+    (binary.TAG_INT64, 7, b'\x13\x00\x00\x00\x00\x00\x00\x00\x07'),
+    (binary.TAG_UINT8, 254, b'\x03\xfe'),
+    (binary.TAG_UINT16, 65534, b'\x04\xff\xfe'),
+    (binary.TAG_UINT32, 4294967294, b'\x05\xff\xff\xff\xfe'),
+    (binary.TAG_UINT64, 18446744073709551614, b'\x06\xff\xff\xff\xff\xff\xff\xff\xfe'),
+    (binary.TAG_INT8, -2, b'\x10\xfe'),
+    (binary.TAG_INT16, -2, b'\x11\xff\xfe'),
+    (binary.TAG_INT32, -2, b'\x12\xff\xff\xff\xfe'),
+    (binary.TAG_INT64, -2, b'\x13\xff\xff\xff\xff\xff\xff\xff\xfe'),
 ]
 
 class SerializeTests(unittest.TestCase):