Projects

Algorithms:

• binary-multisearch.h: algorithm for efficiently searching for multiple items
• hungarian-algorithm-n3: minimum bipartite matching algorithm

Application libraries:

• *libcontacts: a library for handling a simple, flexible contact list

Applications:

• blue: print a table of when the blue hour, the golden hour, or whatever you want occurs
• *contacts: a collection of utilities for inspecting and manipulating your contact list
• learn-your-telephone-number: a program to help you learn your telephone number
• *metar: trivial, yet fully fledged, weather report
• mongoclock: just a humongous clock for the terminal
• mongotimer: a humongous timer or stopwatch for the terminal
• *read-quickly: read plain-text files in blazing speed

Astronomy and geography:

• libred: solar elevation and blackbody colour calculation library
• libtellurian: geodesy library
• *solar-python: solar data calculation and prediction library for Python

Compiler software:

• libparser: right-context-sensitive grammar parsing library

Desktop software and themes:

• simple-icon-theme: a very simple icon theme
• xcman: minimal compositing manager for X
• xkbdbind: global hotkeys for X
• xpybar: a highly extensible minimalistic dock panel

Developer tools:

• auto-auto-complete: autogenerate shell auto-completion scripts
• base-util-tests: correctness tests for the base utilities
• git-rediff: reduce partially resolved merge conflicts
• gpp: Bash-based preprocessor for anything
• loc: simple C code line counter
• *makeenv: run make(1) with environment loaded from .makeenv

Examples:

• rotation3d: example of how to do rotation in three dimensional space

Graphics:

• coopgammad: cooperative gamma server
  • libcoopgamma: cooperative gamma library
    • pylibcoopgamma: Python 3 wrapper for libcoopgamma
• *libclut: C library for manipulating colour lookup tables
• *libcolour: C colour space library
• libgamma: display server abstraction layer for gamma ramps
  • jlibgamma: Java wrapper for libgamma
  • libgammamm: C++ wrapper for libgamma
  • pylibgamma: Python 3 wrapper for libgamma

Hardware utilities:

• adjbacklight: convenient method for adjusting the backlight on your portable computer
• *cg-tools: cooperative gamma-enabled tools
• crt-calibrator: CRT monitor calibrator utility for Linux VT
• deadshred: override the contents of a device that may be broken
• radharc: reduce eye strain and improve sleep
• unstickpixels: screen loop to try to unstick stuck dots

Interface libraries:

• libterminput: terminal input parsing library

Interprocess communication:

• bus: a simple daemonless system for broadcasting messages locally
  • python-bus: Python 3 module for bus

Just for fun:

• doughnut.py: doughnut shaped Python 3.8 code that animates a doughnut

Security:

• anysum: checksum utility supporting multiple hash functions
• asroot: a simpler alternative to sudo and doas
  • editasroot: edit a file that requires root access
• blakesum: checksum utilities for the BLAKE-family of hashing functions
• file2key: a simple command that generates a key from a file and a passphrase
• key2root: authenticate with keyfile and run a process as root
• libar2: library for the Argon2-family of hashing functions
  • libar2simplified: façade for libar2
• libblake: library for the BLAKE-family of hashing functions
• libhashsum: library for calculating the cryptographic hashes
• *libkeccak: Keccak-family, including SHA-3, hashing library
• libsha1: SHA-1 and SHA-0 hashing library
• libsha2: SHA-2-family hashing library
• sha3sum: SHA-3 and Keccak checksum utility

Support libraries:

• liberror: C library for custom errors
  • liberror-backtrace: backtrace support for liberror
• libhaiku: poetic error messages
• *libsimple: a bunch of C functions that are useful when writing simple code
• python-arg: a simple argument parser for Python
• slibc: yet another C standard library

System software:

• alsause: set default ALSA PCM device
• coreupdown: dynamically turn all non-main CPU's on and off
• sleeping-getty: do not start a fullblown getty before it is necessary

Tests and research:

• malloc-vs-new: pipe(7) is slower than unix(7)
• pipes-are-slow: malloc(3) is faster than new in C++

Text libraries:

• libfonts: library for font listing, searching, and configurations
• *libglitter: subpixel-rendering library
• libparsepcf: C library for interpreting PCF (Portable Compiled Format) font files
• libparsepsf: C library for interpreting PSF (PC Screen Font) files
• libparsesfnt: C library for parsing SFNT (scalable/spline font) files
• librifunktionsteckensnittsglyfrasteriseringsprogrambiblioteket: font rasterisation library
• libskrift: text drawing library using libschrift
• *libtracebitmap: C library for converting bitmap graphics into vector graphics

Utilities:

• alarm: schedule an alarm for a program when starting it
• bfind: find(1) variant optimised for finding files rather than listing files
• exec-as: a command that lets you start another command with any argv[0]
• krandom: Keccak-based userspace pseudorandom number generator
• median: calculate the median values for a set of groups
• optimised-true: optimised implementations of true(1) and false(1)
• orphan-reaper: place subreapers in your process tree to keep it structured
• pdeath: run a command that is killed when its parent dies
• setpgrp: commands providing access to the setpgrp and getpgrp system calls
• slack: control your timer slack
• sleep-until: sleep until a specified time
• sshexec: SSH wrapper that makes it easy to run commands directly in the SSH command
• timeprefix: prefix each line with the time it as written
• vtchs: listen for console switches
• xtest: variant of test(1) that can test multiple files from cmdline or stdin
• yes-silly: yes(1), silly edition

* marks stable projects that are not completely finished but are not actively being worked on, if you want something to do, take a look at them, with a few exceptions, they shouldn't be too difficult, but at the same they shouldn't be too trivial.

Tips

• Hardening yaourt(8)

Philosophy

• On IDEs
• Make time
• Proverbs

C mastery

• Beyond the debugger
• What is int?
• C99-style MD-arrays
• X macros
• Duff's device
• The three ways to #include

Critique of C++

Until you've seen a real assembly project, you haven't seen clean code.
Until you've seen a real C++ project, you haven't seen nightmare code.
That is the cost of abstraction.

• class is ill-designed
• References destroy readability and more

Bad UX ideas

• QR codes
• Finding the application icon is difficult
• My monochrome icon theme
• Subpixel rendered text

Recommended reading

• Code Complete (Steve McConnell)
• The Clean Coder (Robert C. Martin)
• Clean Agile (Robert C. Martin)
• Clean Architecture (Robert C. Martin)
• Clean Code (Robert C. Martin) (Clean Code itself is harmful and fails to deliver what it says on the tin, however the book is still worth while reading)
• Optimizing software in C++ (Agner Fog)
• Optimizing subroutines in assembly language (Agner Fog)
• The microarchitecture of Intel, AMD, and VIA CPUs (Agner Fog)
• Floating point exception tracking and NAN ropagation (Agner Fog)
• Bison (Charles Donnelly, Richard Stallman)
• A Book of Abstract Algebra (Charles C. Pinter)
• Matematiska utmaningar (Paul Vaderlind)
• What Every Programmer Should Know About Memory (Ulrich Drepper)
• Good Practices in Library Design, Implementation, and Maintenance (Ulrich Drepper)
• How To Write Shared Libraries (Ulrich Drepper)
• Utilizing the other 80% of your system's performance (Ulrich Drepper)
• The Art of Computer Programming (Donald Knuth)
• Introduction to Algorithms (Cormen, Leiserson, Rivest)
• The Software Craftsman (Sandro Mancuso)
• Introduction to Automata Theory, Languages and Computation (Hopcroft, Motwani, Ullman)

Harmful reading (or at least a waste of time)

• Code That Fits in Your Head (Mark Seemann)

Location

Contact

E-mail: m@maandree.se

PGP keys:

• 3683 C4B7 0CFA 859F 0173  F2CC E0DD 13EB FC7D 5E3E
  Mirrors: Ubuntu key server, SURF key server, OpenPGP key server, Codeberg
  

  New keys will be signed by the previous key. If you don't already have the previous key, compare the newest key with its mirrors, particularily the mirror on Codeberg.

Old keys:

• BC61 893E C01F DBDE E061  BEF6 7BE0 C422 4008 9FE0
• 8AAD AC7C E522 E5E8 674C  F187 5319 6754 6ABC 233E
• 569B D169 6917 FE31 9D2A  4722 BF22 36A2 678A 6A76
• 2FDB ECEF 0E05 36F4 A05C  A62E CE30 6090 E98B 08C7

All files on this domain (but not the subdomains) are signed with the current key, just add .sig to the end of the URL to get the signature file.

I don't have any social media account, nor even IRC. But my e‑mail inbox is open for any inquiry or even a hello.

Do I have?

Why so many No?