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uctypes_ptr_native_le.py

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uctypes_ptr_native_le.py

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import sys

try:

import uctypes

except ImportError:

print("SKIP")

raise SystemExit

if sys.byteorder != "little":

print("SKIP")

raise SystemExit

desc = {

"ptr": (uctypes.PTR | 0, uctypes.UINT8),

"ptr16": (uctypes.PTR | 0, uctypes.UINT16),

"ptr2": (uctypes.PTR | 0, {"b": uctypes.UINT8 | 0}),

}

bytes = b"01"

addr = uctypes.addressof(bytes)

buf = addr.to_bytes(uctypes.sizeof(desc), "little")

S = uctypes.struct(uctypes.addressof(buf), desc, uctypes.NATIVE)

print(S.ptr[0])

assert S.ptr[0] == ord("0")

print(S.ptr[1])

assert S.ptr[1] == ord("1")

print(hex(S.ptr16[0]))

assert hex(S.ptr16[0]) == "0x3130"

print(S.ptr2[0].b, S.ptr2[1].b)

print (S.ptr2[0].b, S.ptr2[1].b)

print(hex(S.ptr16[0]))

assert (S.ptr2[0].b, S.ptr2[1].b) == (48, 49)