My personal C coding style as of late 2023
This article was discussed on Hacker News and on reddit. This has been a ground-breaking year for my C skills, and paradigm shifts in my technique has provoked me to reconsider my habits and coding style. It’s been my largest personal style change in years, so I’ve decided to take a snapshot of its current state and my reasoning. These changes have produced significant productive and organizationa
Arena allocator tips and tricks
This article was discussed on Hacker News. Over the past year I’ve refined my approach to arena allocation. With practice, it’s effective, simple, and fast; typically as easy to use as garbage collection but without the costs. Depending on need, an allocator can weigh just 7–25 lines of code — perfect when lacking a runtime. With the core details of my own technique settled, now is a good time to
A guide to Windows application development using w64devkit
There’s a trend of building services where a monolithic application is better suited, or using JavaScript and Python then being stumped by their troublesome deployment story. This leads to solutions like bundling an entire web browser with an application, or using containers to circumscribe a sprawling dependency tree made of mystery meat. My small development distribution for Windows, w64devkit,
Practical libc-free threading on Linux
Suppose you’re not using a C runtime on Linux, and instead you’re programming against its system call API. It’s long-term and stable after all. Memory management and buffered I/O are easily solved, but a lot of software benefits from concurrency. It would be nice to also have thread spawning capability. This article will demonstrate a simple, practical, and robust approach to spawning and managing
Let's write a setjmp
This article was discussed on Hacker News. Yesterday I wrote that setjmp is handy and that it would be nice to have without linking the C standard library. It’s conceptually simple, after all. Today let’s explore some differently-portable implementation possibilities with distinct trade-offs. At the very least it should illuminate why setjmp sometimes requires the use of volatile. First, a quick r
My review of the C standard library in practice
This article was discussed on Hacker News and critiqued on Wandering Thoughts. In general, when working in C I avoid the standard library, libc, as much as possible. If possible I won’t even link it. For people not used to working and thinking this way, the typical response is confusion. Isn’t that like re-inventing the wheel? For me, libc is a wheel barely worth using — too many deficiencies in b
The quick and practical "MSI" hash table
Follow-up: Solving “Two Sum” in C with a tiny hash table I generally prefer C, so I’m accustomed to building whatever I need on the fly, such as heaps, linked lists, and especially hash tables. Few programs use more than a small subset of a data structure’s features, making their implementation smaller, simpler, and more efficient than the general case, which must handle every edge case. A typical
Fast CSV processing with SIMD
This article was discussed on Hacker News. I recently learned of csvquote, a tool that encodes troublesome CSV characters such that unix tools can correctly process them. It reverses the encoding at the end of the pipeline, recovering the original input. The original implementation handles CSV quotes using the straightforward, naive method. However, there’s a better approach that is not only simpl
State machines are wonderful tools
This article was discussed on Hacker News. I love when my current problem can be solved with a state machine. They’re fun to design and implement, and I have high confidence about correctness. They tend to: Present minimal, tidy interfaces Require few, fixed resources Hold no opinions about input and output Have a compact, concise implementation Be easy to reason about State machines are perhaps o
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Two handy GDB breakpoint tricks
Solving "Two Sum" in C with a tiny hash table
SDL2 common mistakes and how to avoid them
QOI is now my favorite asset format
I solved the Dandelions paper-and-pencil game
Assertions should be more debugger-oriented
Luhn algorithm using SWAR and SIMD
Compressing and embedding a Wordle word list
The wild west of Windows command line parsing
A new protocol and tool for PNG file attachments
Netpbm Animation Showcase