40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
import struct
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print(struct.calcsize("<bI"))
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print(struct.unpack("<bI", b"\x80\0\0\x01\0"))
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print(struct.calcsize(">bI"))
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print(struct.unpack(">bI", b"\x80\0\0\x01\0"))
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# 32-bit little-endian specific
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#print(struct.unpack("bI", b"\x80\xaa\x55\xaa\0\0\x01\0"))
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print(struct.pack("<i", 1))
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print(struct.pack(">i", 1))
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print(struct.pack("<h", 1))
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print(struct.pack(">h", 1))
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print(struct.pack("<b", 1))
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print(struct.pack(">b", 1))
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print(struct.pack("<bI", -128, 256))
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print(struct.pack(">bI", -128, 256))
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print(struct.calcsize("100sI"))
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print(struct.calcsize("97sI"))
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print(struct.unpack("<6sH", b"foo\0\0\0\x12\x34"))
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print(struct.pack("<6sH", b"foo", 10000))
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s = struct.pack("BHBI", 10, 100, 200, 300)
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v = struct.unpack("BHBI", s)
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print(v == (10, 100, 200, 300))
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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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# fails on 32-bit machine
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#print(struct.pack("<Q", 2**64 - 1))
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#print(struct.pack("<Q", 0xffffffffffffffff))
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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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