Last active
November 20, 2025 16:43
-
-
Save andy-shev/afe4c0e009cb3008ac613d8384aaa6eb to your computer and use it in GitHub Desktop.
This file contains hidden or 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
| #!/usr/bin/env python3 | |
| # -*- coding: UTF-8 -*- | |
| # vim: ts=4 sw=4 et ai si | |
| from __future__ import print_function | |
| import random | |
| import sys | |
| def handle(event, state, bit): | |
| oe = event | |
| if state: | |
| ne = oe | bit | |
| else: | |
| ne = oe & ~bit | |
| return (ne ^ oe) == bit | |
| def handle_and_print(iteration, event, state, bit): | |
| r = handle(event, state, bit) | |
| print(f"[{iteration}] 0x{event:02x} {state and "|" or "&"} 0x{bit:02x} --> {r:d}:", r and "handle" or "return") | |
| def test_event(event, state, bit): | |
| orig = event | |
| print(f"Initial event: 0x{orig:02x}, new state: {state} for bit 0x{bit:02x}") | |
| handle_and_print("-", 0, state, bit) | |
| for iteration in range(0, 8): | |
| handle_and_print(iteration, event, state, bit) | |
| if state: | |
| event |= (1 << iteration) | |
| else: | |
| event &= ~(1 << iteration) | |
| handle_and_print("-", event, state, bit) | |
| def test_events(event, bit): | |
| if event > 0: | |
| test_event(event, False, bit) | |
| if not (event & bit): | |
| test_event(event, True, bit) | |
| def main(argv): | |
| try: | |
| event = int(argv[1], 0) | |
| except: | |
| event = random.randint(0, 255) | |
| try: | |
| bitnum = int(argv[2], 0) | |
| except: | |
| bitnum = random.randint(0, 7) | |
| bit = 1 << bitnum | |
| if (event & bit): | |
| test_event(event, False, bit) | |
| else: | |
| test_event(event, True, bit) | |
| test_events(0, bit) | |
| test_events(bit, bit) | |
| if __name__ == "__main__": | |
| sys.exit(main(sys.argv)) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment