219 results for "":
Next power of two
While looking to write a pure ooc version of ftgl, I was reading the source of ftgl-gl3 and I stumbled upon this piece of code:
static inline GLuint NextPowerOf2(GLuint in)
{
in -= 1;
in |= in >> 16;
in |= in >> 8;
in |= in >> 4;
in |= in >> 2;
in |= in >> 1;
return in + 1;
}
This is needed because dealing with power-of-two textures (32x32, 64x64, 128x128, etc.) is more efficient with OpenGL (some implementations don’t even support non-power-of-two textures!).
rock 0.9.8 is out
A little less than two months after the previous release, I’m happy to announce
that the ooc compiler rock 0.9.8, codename columbia is now out.
The impatients can readily skip to the release notes, but for those who prefer a narrative, let me tell you why I’m excited about this release.
String interpolation
We’ve thrown around this idea a lot since the early versions of rock since we have a few rubyists in our ranks, but only recently Alexandros Naskos took matters into his own hands and just implemented the fuck out of it.
ELF relocations
The last article, Position-independent code, was a mess. But who could blame us? We looked at the world, and found it to be a chaotic and seemingly nonsensical place. So, in order to blend in, we had to let go of a little bit of sanity.
The time has come to reclaim it.
Short of faulty memory sticks, memory locations don’t magically turn from
0x0 into valid addresses. Someone is doing the turning, and we’re going to
find out who, if it takes the rest of the series.
Proc macro support in rust-analyzer for nightly rustc versions
I don’t mean to complain. Doing software engineering for a living is a situation of extreme privilege. But there’s something to be said about how alienating it can be at times.
Once, just once, I want to be able to answer someone’s “what are you working on?” question with “see that house? it wasn’t there last year. I built that”.
Instead for now, I have to answer with: “well you see… support for proc macros was broken in rust-analyzer for folks who used a nightly rustc toolchain, due to incompatibilities in the bridge (which is an unstable interface in the first place), and it’s bound to stay broken for the foreseeable future, not specifically because of technical challenges, but mostly because of human and organizational challenges, and I think I’ve found a way forward that will benefit everyone.”
oocdoc, Part 4 — sourcepath
In the previous article, We’ve built a nagaqueen-based tool that can parse one ooc file, detect class declarations and print its doc strings. Today, we’re making a bit of infrastructure for our app to support more sizable projects.
Source path and lib folders
Parsing a single file was a nice milestone, but it’s not nearly enough. We want to generate documentation for a whole project at a time: and since we’ll want to cross-link the various bits of documentation we generate, we’ll also need to parse the various dependencies (such as the ooc sdk, and any used library) so that we can resolve argument types and link them properly.
Day 13 (Advent of Code 2020)
In the Day 13 problem, we’re trying to take the bus.
Our input looks like this:
939
7,13,x,x,59,x,31,19
The first line indicates the earliest minute we can leave from the bus terminal, and the second line indicates the “identifier” of the buses that are active.
Each bus departs every “bus ID” minutes - bus 7 leaves at minute 0, minute 7, minute 14, minute 21, etc. The question is: which bus can we take first (apparently they either all go to the same destination, or we don’t really care where we’re going), and how long do we have to wait for it?
Frustrated? It's not you, it's Rust
Learning Rust is… an experience. An emotional journey. I’ve rarely been more frustrated than in my first few months of trying to learn Rust.
What makes it worse is that it doesn’t matter how much prior experience you have, in Java, C#, C or C++ or otherwise - it’ll still be unnerving.
In fact, more experience probably makes it worse! The habits have settled in deeper, and there’s a certain expectation that, by now, you should be able to get that done in a shorter amount of time.
The builder pattern, and a macro that keeps FFI code DRY
Our ping API is simple, but it’s also very limited:
pub fn ping(dest: ipv4::Addr) -> Result<(), String>
// called as:
ping(ipv4::Addr([8, 8, 8, 8])).unwrap();
It doesn’t allow specifying the TTL (time to live) of packets, it doesn’t allow specifying the timeout, it doesn’t let one specify the data to send along, and it doesn’t give us any kind of information on the reply.
GDB scripting and Indirect functions
Rust modules vs files
A while back, I asked on Twitter what people found confusing in Rust, and one of the top topics was “how the module system maps to files”.
I remember struggling with that a lot when I first started Rust, so I’ll try to explain it in a way that makes sense to me.
Important note
All that follows is written for Rust 2021 edition. I have no interest in learning (or teaching) the ins and outs of the previous version, especially because it was a lot more confusing to me.