PythonPumpConnector/parse_utils.py at main · OpenMinimed/PythonPumpConnector · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
from datetime import datetime
from enum import IntEnum
from value_converter import ValueConverter

class ParseUtils():

    @staticmethod
    def consume(data: bytes, n: int) -> tuple[int, bytes]:
        # NOTE: copying this bytes object every time is rather wasteful
        assert n <= len(data)
        value = int.from_bytes(data[0:n], "little")
        return value, data[n:]

    @staticmethod
    def consume_u8(data: bytes) -> tuple[int, bytes]:
        value, data = __class__.consume(data, 1)
        return value, data

    @staticmethod
    def consume_u16(data: bytes) -> tuple[int, bytes]:
        value, data = __class__.consume(data, 2)
        return value, data

    @staticmethod
    def consume_u32(data: bytes) -> tuple[int, bytes]:
        value, data = __class__.consume(data, 4)
        return value, data

    @staticmethod
    def consume_i8(data: bytes) -> tuple[int, bytes]:
        value, data = __class__.consume(data, 1)
        value = ValueConverter.sign_extend(value, 8)
        return value, data

    @staticmethod
    def consume_i16(data: bytes) -> tuple[int, bytes]:
        value, data = __class__.consume(data, 2)
        value = ValueConverter.sign_extend(value, 16)
        return value, data

    @staticmethod
    def consume_f16(data: bytes) -> tuple[float, bytes]:
        value, data = __class__.consume(data, 2)
        value = ValueConverter.decode_medfloat16(value)
        return value, data

    @staticmethod
    def consume_f32(data: bytes) -> tuple[float, bytes]:
        value, data = __class__.consume(data, 4)
        value = ValueConverter.decode_medfloat32(value)
        return value, data

    @staticmethod
    def consume_datetime(data: bytes) -> tuple[datetime, bytes]:
        n = 7
        assert n <= len(data)
        value = ValueConverter.decode_datetime(data[0:n])
        return value, data[n:]


    @staticmethod
    def parse_flags(raw: int, enum_type: type[IntEnum]) -> list[IntEnum]:
        return [flag for flag in enum_type if raw & flag]