Cody Boone Ferguson
1ac055fa85
In most cases the word was changed to 'obfuscation' as it was about
obfuscation, not deobfuscation. In some cases like 1995/leo since the
file was (in 1995/leo) about a secret switch it was changed to
'secret.md' (and 'secret.html') but there were others like that as well.
One entry had the words 'spoiling the size rule' but this had been
changed to 'deobfuscating the size rule' which was obviously wrong.
In the latter YYYY/README.md files the judges had written after some
entries (brief summaries) '...
...We'll stop spouting spoilers now. Have fun exploring all the
entries!
but that was changed to:
...We'll stop spouting deobfuscation information now. Have fun
exploring all the entries!
which wasn't really about deobfuscation but just a brief summary of what
the entries did.
And in the most problematic case (at least for me :-), 2018/ferguson) I
had put a joke in:
... but it's the only Easter egg I won't spoil
but it was changed to 'won't deobfuscate' which not only is not what it
is but it spoilt the joke.
In some cases the word was changed back to 'SPOILER' (or similar) but in
most cases not. I believe it should be better now. There are some
caveats, however, as below.
Although make find_missing_links is okay I do not remember if this will
catch links that refer to '%%REPO_URL%%' or other pandoc tokens. This
means I might have to go back to some earlier years to verify links are
okay. That should not take that much time I hope.
It might also be that some wording can still be improved some but it is
hoped this will be discovered when checking links and looking over the
manifest (which obviously changed).
3.4 KiB
To build:
make
To use:
./hecate.sh
./glock.sh
Try:
./try.sh
This script will ask you if you wish to try again after each run. Type in any
character other than y or Y to exit at this point.
Judges' remarks:
Try to figure out how this entry determines the optimization level with which it had been compiled. Is this an example of undefined behavior or unspecified behavior?
Author's remarks:
Summary
Sinon is a game of timing, the goal is to eliminate all enemies in
under one minute.
To start, compile and run the program. To resume, compile and run the output repeatedly until you have won/lost the game. For example:
cp prog.c run.c
gcc -O0 run.c -o run && ./run | tee run.c
gcc -O2 run.c -o run && ./run | tee run.c
...
Details
Sinon is played by compiling and running the output repeatedly. Two
factors determine what actions are taken:
- Time since last compilation.
- Whether compiler optimizations are enabled or not.
If you fire too quickly, the weapon will jam. If you fire too slowly, you will not be able to eliminate all the enemies in time. Thus the primary objective of the game is to time your compilations just right.
Sinon has two weapons that are selected based on compiler optimization
level:
-
"gcc -O2" or "clang -O2" will fire Hecate II, a powerful rifle that requires longer time to cool off.
-
"gcc -O0" or "clang -O0" will fire Glock 18C, a less powerful pistol that requires less time to cool off.
Because the weapons cool off independently, the best strategy is to alternate between the two weapons. It is fairly easy to win the game with this strategy even with occasional jams.
If your compiler does not have the right optimizations, only Glock 18C would be available. It is still possible to win, but your timing will need to be more precise. This is effectively playing the game on "hard" mode. It is worth trying this mode even if you have the right compilers.
Compatibility
Sinon has been tested and verified to work on these platforms:
- gcc 4.4.3 on Linux.
- gcc 4.4.5 on Linux.
- gcc 4.8.2 on Linux.
- gcc 4.8.3 on Cygwin/MingW.
- clang 3.4-1 on Linux.
- clang 3.4.2 on Cygwin.
- gcc 4.3.5 on JS/Linux (playable but likely unwinnable, because it takes too long to compile).
- tcc 0.9.25 on JS/Linux (no optimization, so only "hard" mode is available).
Sinon is intended to be played in a 80x25 terminal.
Miscellaneous features
Sinon might be the first game that uses compiler optimization level as
a primary input.
Sinon has a demo mode that plays the game automatically. Make sure
that there are no files named "run" and "run.c" in current directory
(they will be overwritten) and run:
perl prog.c | bash
File size and CRC32 of prog.c are embedded in line 7.
Process for making Sinon is included in obfuscation.html.
Layout of this code is based on Asada Shino, also known as "Sinon",
from Sword Art Online.