kopia lustrzana https://github.com/micropython/micropython
54 wiersze
1.4 KiB
Python
54 wiersze
1.4 KiB
Python
try:
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from collections import OrderedDict
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import uctypes
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except ImportError:
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print("SKIP")
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raise SystemExit
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desc = OrderedDict(
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{
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# arr is array at offset 0, of UINT8 elements, array size is 2
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"arr": (uctypes.ARRAY | 0, uctypes.UINT8 | 2),
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# arr2 is array at offset 0, size 2, of structures defined recursively
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"arr2": (uctypes.ARRAY | 0, 2, {"b": uctypes.UINT8 | 0}),
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"arr3": (uctypes.ARRAY | 2, uctypes.UINT16 | 2),
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"arr4": (uctypes.ARRAY | 0, 2, {"b": uctypes.UINT8 | 0, "w": uctypes.UINT16 | 1}),
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"sub": (
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0,
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{
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"b1": uctypes.BFUINT8 | 0 | 4 << uctypes.BF_POS | 4 << uctypes.BF_LEN,
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"b2": uctypes.BFUINT8 | 0 | 0 << uctypes.BF_POS | 4 << uctypes.BF_LEN,
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},
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),
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}
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)
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data = bytearray(b"01234567")
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S = uctypes.struct(uctypes.addressof(data), desc, uctypes.LITTLE_ENDIAN)
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print(uctypes.sizeof(S.arr))
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assert uctypes.sizeof(S.arr) == 2
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print(uctypes.sizeof(S.arr2))
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assert uctypes.sizeof(S.arr2) == 2
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print(uctypes.sizeof(S.arr3))
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try:
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print(uctypes.sizeof(S.arr3[0]))
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except TypeError:
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print("TypeError")
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print(uctypes.sizeof(S.arr4))
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assert uctypes.sizeof(S.arr4) == 6
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print(uctypes.sizeof(S.sub))
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assert uctypes.sizeof(S.sub) == 1
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# invalid descriptor
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try:
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print(uctypes.sizeof([]))
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except TypeError:
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print("TypeError")
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