Created
June 27, 2019 01:04
-
-
Save mt-caret/49d61d22a7577c4e8095f4fc92f86a22 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import numpy as np | |
from u256 import u256 | |
max_value = 2**256 - 1 | |
min_value = 0 | |
mask = 2**32 - 1 | |
o = u256() | |
def encode(n): | |
assert n <= max_value and n >= min_value | |
ret = [] | |
for i in range(8): | |
ret.append((n >> (i * 32)) & mask) | |
return ret | |
def decode(xs): | |
assert len(xs) == 8 | |
ret = 0 | |
for i in range(8): | |
assert xs[i] <= mask and xs[i] >= 0 | |
ret |= xs[i] << (i * 32) | |
return ret | |
def to_fut(xs): | |
return np.array(xs, dtype=np.uint32) | |
def of_fut(xs): | |
if 'get' in dir(xs): | |
return xs.get().tolist() | |
else: | |
return xs.tolist() | |
def call1(f, a): | |
arg = encode(a) | |
res = of_fut(f(to_fut(arg))) | |
print("input", arg, decode(arg)) | |
print("output", res, decode(res)) | |
def test_pack_unpack_roundtrip(a): | |
assert call1(o.pack_unpack_roundtrip, a) == a | |
if __name__ == '__main__': | |
test_pack_unpack_roundtrip(1) | |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment