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awk | DOOM | |
---|---|---|
34 | 91 | |
1,918 | 12,687 | |
- | 2.8% | |
8.4 | 2.5 | |
about 1 month ago | 5 days ago | |
C | C++ | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 only |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
awk
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Csvlens: Command line CSV file viewer. Like less but made for CSV
Awk now supports a `--csv` flag for processing csv's. https://github.com/onetrueawk/awk/blob/master/README.md
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Perl first commit: a “replacement” for Awk and sed
Right, "the one true awk" corresponds to a book written in 1988, very explicity. https://github.com/onetrueawk/awk
You were the one that that said POSIX awk to begin with, I was using your terms.
As far as shitting on the GMU tools, I don't think I've seen someone do that for over 20 years.
This is not a productive conversation. You can live life however you want
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[2022 all days][Awk] AoC in 101 lines of Awk
I also wrote a small program to benchmark and check the solutions across different Awk implementations (see the image). I use the macos system awk (which is pretty close to https://github.com/onetrueawk/awk if I'm not mistaken) as a reference (the first column), so all solutions had to work with that.
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Where is keyword behavior defined?
A simpler Yacc grammar is awk/awkgram.y.
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-🎄- 2022 Day 11 Solutions -🎄-
Neat, this is now the third year I'm using awk and still learning new tricks. (I'm using awk as the reference, so I don't use gnu extensions.)
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Capitalizing words in awk
I did this in nawk, which doesn't support extended regular expressions. If instead you're using gawk, which does, check out \b for word boundaries in extended regular expressions. The [^a-z][a-z] approach you showed consumes the prior character.
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Coffee with Brian Kernighan – Computerphile [video]
BWK’s commit and test files (mentioned in the video)
https://github.com/onetrueawk/awk/commit/d3a19e6f2533d479841...
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ลอง awk ภาษาไทยใช้ได้แล้วแต่ต้องใช้ branch ชื่อ unicode-support
git clone -b unicode-support https://github.com/onetrueawk/awk.git
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anon has a wholesome family
This is dumb as fuck. Brian Kernighan of K&R (The C Programming Language) is 80 and he’s still more intelligent than any of you retards. Mf just submitted a patch to awk a couple months ago https://github.com/onetrueawk/awk
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Unix legend Brian Kernighan, who is the "k" in "awk" and is 80 years old, keeps fixing things. He has added Unicode support to awk, but he couldn't figure out how use git, so he just emailed his changes to the current maintainer
The Unicode branch: https://github.com/onetrueawk/awk/tree/unicode-support
DOOM
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Doom Released Under GPLv2
commercially exploit or use for any commercial purpose."
[1] https://github.com/id-Software/DOOM/commit/4eb368a960647c8cc...
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GTA 5 source code leaks online
The original Doom had third-party audio playback routines, so the source came with a rewritten sound server: https://github.com/id-Software/DOOM/tree/master/sndserv
The bad news: this code only compiles and runs on linux. We couldn't
- What you can do with C ?
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Software Disenchantment
Here's a repo for you with no test coverage and no auto-generated DI. They using unsafe pointers all over the place, too!
https://github.com/id-Software/DOOM
Shall I prepare the postage for the letter in which you'll call John Carmack an MBA? Should we send another to Chris Sawyer? I heard he didn't even write a formal design doc for Roller Coaster Tycoon!
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Ask HN: Good practices for my first C project
cURL is one of the most used C libs and is an example of good quality C code. If you follow the style used there, see e.g. https://github.com/curl/curl/blob/master/lib/dynhds.h (and associated dynhds.c) you will be good.
Looking at the source of some of the old game-engines from the era that have since been released as open-source can also be helpful, like https://github.com/id-Software/DOOM.
In both cases notice how simple and elegant a lot of the code is. There is already enough complexity inherent in the problem they are solving, and that is where the focus should be.
Any IDE with a working language server to make it easy to jump around and refactor should work fine. Limitations might be due to the C language itself?
Error handling on such a fixed platform does not need to be super-advanced. You should always be within the confines of the system so there shouldn't be much that can go wrong. If stuff goes wrong anyway just being able call a function Fatal("FooBar failed with code 34") when unexpected stuff happens and have it log somewhere to be able to dig around should be enough. You never need to be able to recover and retry.
Make sure to use https://clang.llvm.org/docs/AddressSanitizer.html or a similar tool when developing outside of the PSOne.
That said, consider statically allocating global buffers for most stuff and avoid using the heap for most stuff.
Good luck working within the confines of the PSOne! Many hackers have pulled the hair from their head on that platform ;)
- Ask HN: Where do I find good code to read?
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Running Stable Diffusion in 260MB of RAM
Probably more easily than you'd think. DOOM is open source[1], and as GP alludes, is probably the most frequently ported game in existence, so its source code almost certainly appears multiple times in GPT-4's training set, likely alongside multiple annotated explanations.
[1] https://github.com/id-Software/DOOM
- Where can I get game files to study?
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Some were meant for C [pdf]
I'd define an arena as the pattern where the arena itself owns N objects. So you free the arena to free all objects.
My first job was at EA working on console games (PS2, GameCube, XBox, no OS or virtual memory on any of them), and while at the time I was too junior to touch the memory allocators themselves, we were definitely not malloc-ing and freeing all the time.
It was more like you load data for the level in one stage, which creates a ton of data structures, and then you enter a loop to draw every frame quickly. There were many global variables.
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Wikipedia calls it a region, zone, arena, area, or memory context, and that seems about right:
https://en.wikipedia.org/wiki/Region-based_memory_management
It describes history from 1967 (before C was invented!) and has some good examples from Apache ("pools") and Postgres ("memory contexts").
I also just looked at these codebases:
https://github.com/mit-pdos/xv6-public (based on code from the 70's)
https://github.com/id-Software/DOOM (1997)
I looked at allocproc() in xv6, and gives you an object from a fixed global array. A lot of C code in the 80's and 90's was essentially "kernel code" in that it didn't have an OS underneath it. Embedded systems didn't run on full-fledges OSes.
DOOM tends to use a lot of what I would call "pools" -- arrays of objects of a fixed size, and that's basically what I remember from EA.
Though in g_game.c, there is definitely an arena of size 0x20000 called "demobuffer". It's used with a bump allocator.
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So I'd say
- malloc / free of individual objects was NEVER what C code looked like (aside from toy code in college)
- arena allocators were used, but global vars and pools are also very common.
- arenas are more or less wash for memory safety. they help you in some ways, but hurt you in others.
The reason C programmers don't malloc/free all the time is for speed, not memory safety. Arenas are still unsafe.
When you free an arena, you have no guarantee there's nothing that points to it anymore.
Also, something that shouldn't be underestimated is that arena allocators break tools like ASAN, which use the malloc() free() interface. This was underscored to me by writing a garbage collector -- the custom allocator "broke" ASAN, and that was actually a problem:
https://www.oilshell.org/blog/2023/01/garbage-collector.html
If you want memory safety in your C code, you should be using ASAN (dynamically instrumented allocators) and good test coverage. Arenas don't help -- they can actually hurt. An arena is a trivial idea -- the problem is more if that usage pattern actually matches your application, and apps evolve over time.
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What is your gender?
Doom
What are some alternatives?
frawk - an efficient awk-like language
open-watcom-v2 - Open Watcom V2.0 - Source code repository, Wiki, Latest Binary build, Archived builds including all installers for download.
tectonic - A modernized, complete, self-contained TeX/LaTeX engine, powered by XeTeX and TeXLive.
project-based-tutorials-in-c - A curated list of project-based tutorials in C
goawk - A POSIX-compliant AWK interpreter written in Go, with CSV support
Apollo-11 - Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.
awesome-c - A curated list of awesome C frameworks, libraries, resources and other shiny things. Inspired by all the other awesome-... projects out there.
doomgeneric - Easily portable doom
AwkUnicodeSplit - An awk(1) fragment for reassembling Unicode characters after a split()
luxtorpeda - Steam Play compatibility tool to run games using native Linux engines
calendar - print upcoming events
angband - A free, single-player roguelike dungeon exploration game