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import sys
# Depending on the port, the numbers in this test may be implemented as "small"
# native 64 bit ints, arbitrary precision large ints, or large integers using 64-bit
# long longs.
try:
x = int.from_bytes(b"\x6F\xAB\xCD\x12\x34\x56\x78\xFB", "big")
except OverflowError:
print("SKIP") # Port can't represent this size of integer at all
raise SystemExit
print(hex(x))
b = x.to_bytes(8, "little")
print(b)
print(x.to_bytes(8, "big"))
# padding in output
print(x.to_bytes(20, "little"))
print(x.to_bytes(20, "big"))
# check that extra zero bytes don't change the internal int value
print(int.from_bytes(b + bytes(10), "little") == x)
# can't write to a zero-length bytes object
try:
x.to_bytes(0, "little")
except OverflowError:
print("OverflowError")
# or one that it too short
try:
x.to_bytes(7, "big")
except OverflowError:
print("OverflowError")
# negative representations
# MicroPython int.to_bytes() behaves as if signed=True for negative numbers
if "micropython" in repr(sys.implementation):
def to_bytes_compat(i, l, e):
return i.to_bytes(l, e)
else:
# Implement MicroPython compatible behaviour for CPython
def to_bytes_compat(i, l, e):
return i.to_bytes(l, e, signed=i < 0)
print(to_bytes_compat(-x, 8, "little"))
print(to_bytes_compat(-x, 20, "big"))
print(to_bytes_compat(-x, 20, "little"))
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