kopia lustrzana https://github.com/micropython/micropython
44 wiersze
1.4 KiB
Python
44 wiersze
1.4 KiB
Python
try:
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import struct
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except ImportError:
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print("SKIP")
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raise SystemExit
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# check maximum pack on 32-bit machine
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print(struct.pack("<I", 2**32 - 1))
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print(struct.pack("<I", 0xffffffff))
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# long long ints
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print(struct.pack("<Q", 1))
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print(struct.pack(">Q", 1))
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print(struct.pack("<Q", 2**64 - 1))
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print(struct.pack(">Q", 2**64 - 1))
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print(struct.pack("<Q", 0xffffffffffffffff))
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print(struct.pack(">Q", 0xffffffffffffffff))
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print(struct.pack("<q", -1))
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print(struct.pack(">q", -1))
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print(struct.pack("<Q", 1234567890123456789))
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print(struct.pack("<q", -1234567890123456789))
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print(struct.pack(">Q", 1234567890123456789))
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print(struct.pack(">q", -1234567890123456789))
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print(struct.unpack("<Q", b"\x12\x34\x56\x78\x90\x12\x34\x56"))
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print(struct.unpack(">Q", b"\x12\x34\x56\x78\x90\x12\x34\x56"))
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print(struct.unpack("<q", b"\x12\x34\x56\x78\x90\x12\x34\xf6"))
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print(struct.unpack(">q", b"\xf2\x34\x56\x78\x90\x12\x34\x56"))
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# check maximum unpack
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print(struct.unpack("<I", b"\xff\xff\xff\xff"))
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print(struct.unpack("<Q", b"\xff\xff\xff\xff\xff\xff\xff\xff"))
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# check small int overflow
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print(struct.unpack("<i", b'\xff\xff\xff\x7f'))
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print(struct.unpack("<q", b'\xff\xff\xff\xff\xff\xff\xff\x7f'))
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# test with negative big integers that are actually small in magnitude
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bigzero = (1 << 70) - (1 << 70)
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for endian in "<>":
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for type_ in "bhiq":
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fmt = endian + type_
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b = struct.pack(fmt, -2 + bigzero)
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print(fmt, b, struct.unpack(fmt, b))
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