re2c
automatic-ripping-machine
re2c | automatic-ripping-machine | |
---|---|---|
12 | 133 | |
1,026 | 2,339 | |
- | 2.9% | |
6.8 | 9.3 | |
19 days ago | 15 days ago | |
C | Python | |
GNU General Public License v3.0 or later | MIT License |
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.
re2c
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Ask HN: What are some unpopular technologies you wish people knew more about?
(1) Zulip Chat - https://zulip.com/ - seems to be reasonably popular, but more people should know about it
I’ve been using it for over 5 years now [1], and it’s as good as ever. It’s way faster than any other chat app I’ve used. It has a good UI and conversation model. It has a simple and functional API that lets me curl threads and write blog posts based on them.
(only problem is that I Ctrl-+ in my browser to make the font bigger – I think it’s too dense for most people)
(2) re2c regex to state machine compiler - https://re2c.org
A gem from the 90’s, which people have done a great job maintaining and improving (getting Go and Rust target support in the last few years). I started using it in 2016, and used for a new program a few months ago. I came to the conclusion that it should have been built into C, because C has shitty string processing – and Ken Thompson both invented C AND brought regular languages to computing !!
In comparison, treesitter lexers are very low level, fiddly, and error prone. I recently saw dozens of ad hoc fixes to the tree-sitter-bash lexer, which is unsurprising if you look at the structure of the code (manually crawling through backslashes and braces in C).
https://github.com/tree-sitter/tree-sitter-bash/blob/master/...
These fixes are definitely appreciated, but I think it indicates a problem with the model itself.
(based on https://lobste.rs/s/endspx/software_you_are_thankful_for#c_y...)
[1] https://www.oilshell.org/blog/2018/04/26.html
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Irregular Expressions
The "Papers" section on re2c's web site continues Laurikari's work: http://re2c.org/
... but I haven't found them particularly accessible. And it's not clear it's a viable strategy in a general purpose regex engine. Namely, I'm not sure how much bigger it makes the DFA.
Also, AFAIK, these are DFAs. They are different theoretical structures with explicitly more power.
> and then an NDFA is used to match a third time, to extract the capture groups.
That's the PikeVM. It's an NFA simulation. Although it uses additional storage and is otherwise more computationally powerful than just a plain NFA.
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My experience crafting an interpreter with Rust (2021)
> What do you gain by using it?
Performance, although this possibly depends on your compiler, whether you use PGO, and similar finicky issues.
Example: https://eli.thegreenplace.net/2012/07/12/computed-goto-for-e...
Some prior HN discussion: https://news.ycombinator.com/item?id=18678920
Another example where goto is relevant is implementing finite automata. A (very short) paper from 1988 that discusses three different ways of implementing a finite state machine is "How (Not) to Code a Finite State Machine". The documentation of RE2C may be even more interesting: https://re2c.org
RE2C is a program that compiles finite automata into C, Go, or Rust code. It provides many implementation strategies: it can make use of computed or labelled gotos when the language provides them.
Implementing pushdown automata comes with similar issues.
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How to compile DPDK-22.11.1
wget https://github.com/skvadrik/re2c/releases/download/1.0.3/re2c-1.0.3.tar.gz tar -zxvf re2c-1.0.3.tar.gz cd re2c-1.0.3/ ./configure make make install
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Best approach for writing a lexer
In Rust I use https://docs.rs/logos/latest/logos/. I think another similar is http://re2c.org
- re2c is a free and open-source lexer generator for C/C++, Go and Rust
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File parsing with PHP, Bison and re2c
re2c is an open-source lexer generator. It uses regular expressions to recognize tokens.
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Best option for Rust Parser and Lexer Generators?
Those suggested crates are still more or less the popular options. There was also recently added support for Rust in re2c.
- How Does One Develop the Grammar for their New Language
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Javascript Date String Parsing
First, the implementation of strtotime is a textbook study in why other people's C code is not where you want to spend time. You can see the guts of the implementation logic here. This isn't stock C code -- it's code for a system called re2c. This system allows you to write regular expressions in a custom DSL (domain specific language), and then transform/compile those regular expressions down to C programs (also C++ and Go) that will execute those regular expressions. Something in PHP's make file uses this parse_date.re file to generate parse_date.c. If you don't realize parse_date.c is a generated file, this can be extremely rough going. If you've not familiar with re2c is can be regular rough going. We leave further exploration as an exercise for the reader -- an exercise we haven't taken ourself.
automatic-ripping-machine
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BTFS (BitTorrent Filesystem)
This project still seems alive to my pleasant surprise.
https://github.com/automatic-ripping-machine/automatic-rippi...
I never had it fully working because the last time I tried, I was too focused on using VMs or Docker and not just dedicating a small, older computer to it, but I think about it often and may finally just take the time to set up a station to properly rip all the Columbia House CDs I bought when I was a teen and held on to.
- Blue ray discs taking longer to rip than normal DVDs?
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Advice to build an all in one blu-ray ripping and storing (for jellyfin) machine.
Ok. It was actually software as well: https://github.com/automatic-ripping-machine/automatic-ripping-machine
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Ask HN: What are some unpopular technologies you wish people knew more about?
I really like ARM (automatic ripping machine)
https://github.com/automatic-ripping-machine/automatic-rippi...
Put a DVD/blu ray in a drive and it automatically determines the title, starts ripping, then pops the disc out when it's done.
There's options for post-ripping transcoding also.
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Nolan Says Buy Oppenheimer on Blu-ray So No Evil Streaming Service Can Steal It
It's a pain to get set up initially, but the Automatic Ripping Machine[1] plus Jellyfin/Plex/etc[2] makes for a great combination.
[1] https://github.com/automatic-ripping-machine/automatic-rippi...
[2] https://jellyfin.org/
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Looking for experiences with Automatic Ripping Machine and a multi-DVD ripping build
I have a lot of DVDs that I would like to rip and then convert into mkv files. Many of these are small productions that aren't likely to be on "Linux ISO" trackers, so "just download them instead!" is not a valid option. I just recently came across posts like this one and this one and even this one here on DataHoarder (which sadly didn't get any responses) and this one from this past week about this awesome GitHub project called Automatic Ripping Machine that is based on this original post from 2016, but I'm happy to see that it has been getting updates even within the last few weeks.
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Help dumping audio CDs?
To lump on to abcde, its used to great effect within ARM.
- How do I set up the Automatic ripping machine in a container?
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Best way to digitize DvD collection onto Macbook/ Plex Media Server
GitHub - automatic-ripping-machine/automatic-ripping-machine: Automatic Ripping Machine (ARM) Scripts
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Connect Blu Ray drives to my server
I beg to differ Automated Ripingp Machine
What are some alternatives?
parser-demo - Good source layout with Flex and Bison
docker-ripper - The best way to automatically rip optical disks using docker!
Luxon - ⏱ A library for working with dates and times in JS
makemkv-autorip-script - A bash script for automatically ripping movies using MakeMKV, with parallelization for multiple drives.
cmark - CommonMark parsing and rendering library and program in C
Portainer - Making Docker and Kubernetes management easy.
lowdown - simple markdown translator
automatic-ripping-machine - Automatic Ripping Machine (ARM) Scripts
moment - Parse, validate, manipulate, and display dates in javascript.
whipper - Python CD-DA ripper preferring accuracy over speed
plex - a parser and lexer generator as a Rust procedural macro
JBOPS - Just a Bunch Of Plex Scripts