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| 1 | +import uctypes |
| 2 | + |
| 3 | +desc = { |
| 4 | + # arr is array at offset 0, of UINT8 elements, array size is 2 |
| 5 | + "arr": (uctypes.ARRAY | 0, uctypes.UINT8 | 2), |
| 6 | + # arr2 is array at offset 0, size 2, of structures defined recursively |
| 7 | + "arr2": (uctypes.ARRAY | 0, 2, {"b": uctypes.UINT8 | 0}), |
| 8 | + "arr3": (uctypes.ARRAY | 2, uctypes.UINT16 | 2), |
| 9 | + |
| 10 | + # aligned |
| 11 | + "arr5": (uctypes.ARRAY | 0, uctypes.UINT32 | 1), |
| 12 | + # unaligned |
| 13 | + "arr6": (uctypes.ARRAY | 1, uctypes.UINT32 | 1), |
| 14 | + |
| 15 | + "arr7": (uctypes.ARRAY | 0, 1, {"l": uctypes.UINT32 | 0}), |
| 16 | + "arr8": (uctypes.ARRAY | 1, 1, {"l": uctypes.UINT32 | 0}) |
| 17 | +} |
| 18 | + |
| 19 | +data = bytearray(5) |
| 20 | + |
| 21 | +S = uctypes.struct(uctypes.addressof(data), desc, uctypes.LITTLE_ENDIAN) |
| 22 | + |
| 23 | +# assign byte |
| 24 | +S.arr[0] = 0x11 |
| 25 | +print(hex(S.arr[0])) |
| 26 | +assert hex(S.arr[0]) == "0x11" |
| 27 | + |
| 28 | +# assign word |
| 29 | +S.arr3[0] = 0x2233 |
| 30 | +print(hex(S.arr3[0])) |
| 31 | +assert hex(S.arr3[0]) == "0x2233" |
| 32 | + |
| 33 | +# assign word, with index |
| 34 | +S.arr3[1] = 0x4455 |
| 35 | +print(hex(S.arr3[1])) |
| 36 | +assert hex(S.arr3[1]) == "0x4455" |
| 37 | + |
| 38 | +# assign long, aligned |
| 39 | +S.arr5[0] = 0x66778899 |
| 40 | +print(hex(S.arr5[0])) |
| 41 | +assert hex(S.arr5[0]) == "0x66778899" |
| 42 | + |
| 43 | +print(S.arr5[0] == S.arr7[0].l) |
| 44 | +assert S.arr5[0] == S.arr7[0].l |
| 45 | + |
| 46 | + |
| 47 | +# assign long, unaligned |
| 48 | +S.arr6[0] = 0xAABBCCDD |
| 49 | +print(hex(S.arr6[0])) |
| 50 | +assert hex(S.arr6[0]) == "0xaabbccdd" |
| 51 | + |
| 52 | +print(S.arr6[0] == S.arr8[0].l) |
| 53 | +assert S.arr6[0] == S.arr8[0].l |
| 54 | + |
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