Older blog entries for sengan (starting at number 1)

Spent 3 hours on tax forms. Mmm, lovely US tax system. In the process found out there are tons of charities where I live (Boulder, CO).

Other than that read an Anarchism Triumphant that kind of heralds the recent court decision that source code is speech: we write code in higher level languages to help others understand it. Otherwise we could code in hex (like I did on the Z80 before I had a stable assembler). Since it is the expression to other human-beings that is copyrightable, then is a binary string which controls a machines' behaviour copyrightable? And if it is, is it the full string or some arbitrary percentage of it: am I violating copyright if I come up with a different string which performs the same function (eg containing a different copyright string)? It can't be the behaviour executed by the machine, since I would have thought that's the domain of patent law. But if a binary string is not copyrightable then perhaps the only way to distribute software while maintaining copyright should be to distribute the source code. Provocative!

Found caolan's article interesting in that I'm currently coding a binary parser for work (unfortunately not opensource currently). Its target app is the ICE front-end we use to debug x86 chips. x86's have tons of registers & tables in odd-ball formats such as the GDT. Writing or maintaining code to display & edit them is obviously a waste of time. So instead I specify a grammar corresponding to the format of the registers or memory areas. So I now have some 700 lines of Haskell code that parse the ascii grammar file & desugar it. I have yet to code the bitparser itself. However, unlike what caolan wants, it does not need to cope with pointers or structures whose length is specified in the bitstream being bitparsed -- hardware doesn't do that often enough to warrant the extra complexity.

Other than that, played with glade which looks like it could save me some time. Also got Simon Marlow's happy haskell parser to build with ghc 4.06. It works on my haskell code except for the period in "forall a . " in existential type declarations. Finally downloaded the Aqua gtk theme, which I really like. :-).