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Posted to commits@plc4x.apache.org by hu...@apache.org on 2023/05/12 04:06:10 UTC
[plc4x] branch develop updated: feat(plc4py): Add initial signed int
This is an automated email from the ASF dual-hosted git repository.
hutcheb pushed a commit to branch develop
in repository https://gitbox.apache.org/repos/asf/plc4x.git
The following commit(s) were added to refs/heads/develop by this push:
new e14a3d7dc8 feat(plc4py): Add initial signed int
e14a3d7dc8 is described below
commit e14a3d7dc8bae8ead824f019d5e87767c4460adc
Author: Ben Hutcheson <be...@gmail.com>
AuthorDate: Fri May 12 06:01:06 2023 +0200
feat(plc4py): Add initial signed int
---
sandbox/plc4py/plc4py/spi/generation/WriteBuffer.py | 20 ++++++++++++++------
.../tests/unit/plc4py/spi/test_write_buffer.py | 20 ++++++++++++++++++--
2 files changed, 32 insertions(+), 8 deletions(-)
diff --git a/sandbox/plc4py/plc4py/spi/generation/WriteBuffer.py b/sandbox/plc4py/plc4py/spi/generation/WriteBuffer.py
index cb1d3cece1..3fca938f92 100644
--- a/sandbox/plc4py/plc4py/spi/generation/WriteBuffer.py
+++ b/sandbox/plc4py/plc4py/spi/generation/WriteBuffer.py
@@ -14,7 +14,8 @@
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
-from ctypes import c_bool, c_byte, c_ubyte, c_uint16, c_uint32, c_uint64, c_int16, c_int32, c_int64, c_float, c_double
+from ctypes import c_bool, c_byte, c_ubyte, c_uint16, c_uint32, c_uint64, c_int16, c_int32, c_int64, c_float, c_double, \
+ c_int8
from dataclasses import dataclass
from typing import List
@@ -65,7 +66,7 @@ class WriteBuffer(ByteOrderAware, PositionAware):
def write_unsigned_long(self, value: c_uint64, bit_length: int = 64, logical_name: str = "", **kwargs) -> None:
raise NotImplementedError
- def write_signed_byte(self, value: c_byte, bit_length: int = 8, logical_name: str = "", **kwargs) -> None:
+ def write_signed_byte(self, value: c_int8, bit_length: int = 8, logical_name: str = "", **kwargs) -> None:
raise NotImplementedError
def write_short(self, value: c_int16, bit_length: int = 16, logical_name: str = "", **kwargs) -> None:
@@ -135,10 +136,7 @@ class WriteBufferByteBased(WriteBuffer):
elif bit_length > 8:
raise SerializationException("unsigned byte can only contain max 8 bits")
else:
- src = bitarray(endian=ByteOrder.get_short_name(self.byte_order))
- src.frombytes(value)
- self.bb[self.position:bit_length] = src[:bit_length]
- self.position += bit_length
+ self._handle_integer_encoding(c_byte(value.value), bit_length, **kwargs)
def write_unsigned_short(self, value: c_uint16, bit_length: int = 16, logical_name: str = "", **kwargs) -> None:
if bit_length <= 0:
@@ -185,3 +183,13 @@ class WriteBufferByteBased(WriteBuffer):
src.frombytes(value)
self.bb[self.position:bit_length] = src[:bit_length]
self.position += bit_length
+
+ def write_signed_byte(self, value: c_int8, bit_length: int = 8, logical_name: str = "", **kwargs) -> None:
+ if bit_length <= 0:
+ raise SerializationException("Signed byte must contain at least 1 bit")
+ elif bit_length > 8:
+ raise SerializationException("Signed byte can only contain max 8 bits")
+ src = bitarray(endian=ByteOrder.get_short_name(self.byte_order))
+ src.frombytes(value)
+ self.bb[self.position:bit_length] = src[:bit_length]
+ self.position += bit_length
diff --git a/sandbox/plc4py/tests/unit/plc4py/spi/test_write_buffer.py b/sandbox/plc4py/tests/unit/plc4py/spi/test_write_buffer.py
index 17d8479374..ab51bd85d2 100644
--- a/sandbox/plc4py/tests/unit/plc4py/spi/test_write_buffer.py
+++ b/sandbox/plc4py/tests/unit/plc4py/spi/test_write_buffer.py
@@ -16,7 +16,7 @@
# specific language governing permissions and limitations
# under the License.
#
-from ctypes import c_bool, c_byte, c_uint16, c_uint64
+from ctypes import c_bool, c_byte, c_uint16, c_uint64, c_int8
import pytest
from bitarray import bitarray
@@ -215,8 +215,24 @@ def test_write_buffer_write_unsigned_long_ascii_encoding_little_endian(mocker) -
assert (ba.obj == bitarray("10001100 10001100 10001100 10001100 10001100 10001100 10001100 10001100", endian="little"))
-def test_write_buffer_write_unsigned_short_ascii_encoding_big_endian(mocker) -> None:
+def test_write_buffer_write_unsigned_long_ascii_encoding_big_endian(mocker) -> None:
wb: WriteBufferByteBased = WriteBufferByteBased(8, ByteOrder.BIG_ENDIAN)
wb.write_unsigned_long(c_uint64(11111111), 64, "ASCII Value of 1111 1111 - 0x3131313131313131", encoding="ASCII")
ba: memoryview = wb.get_bytes()
assert (ba.obj == bitarray("00110001 00110001 00110001 00110001 00110001 00110001 00110001 00110001", endian="big"))
+
+
+def test_write_buffer_set_signed_byte(mocker) -> None:
+ wb: WriteBufferByteBased = WriteBufferByteBased(1, ByteOrder.LITTLE_ENDIAN)
+ wb.write_signed_byte(c_int8(-1), 8)
+ ba: memoryview = wb.get_bytes()
+ assert (ba.obj == bitarray("11111111",
+ endian="little"))
+
+
+def test_write_buffer_set_signed_byte_three(mocker) -> None:
+ wb: WriteBufferByteBased = WriteBufferByteBased(1, ByteOrder.LITTLE_ENDIAN)
+ wb.write_signed_byte(c_int8(3), 8)
+ ba: memoryview = wb.get_bytes()
+ assert (ba.obj == bitarray("11000000",
+ endian="little"))