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Torsten Ruger 2014-09-30 23:16:52 +03:00
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_posts/2014-08-19-object-storage.md
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@ -3,7 +3,7 @@ layout: news
author: Torsten author: Torsten
--- ---
While trying to figure out what i am coding i had to attac this storage format before i wanted to. The While trying to figure out what i am coding i had to attack this storage format before i wanted to. The
immediate need is for code dumps, that are concise but readable. I started with yaml but that just takes immediate need is for code dumps, that are concise but readable. I started with yaml but that just takes
too many lines, so it's too difficult to see what is going on. too many lines, so it's too difficult to see what is going on.
@ -50,7 +50,7 @@ switches, more and more effort could be exerted on critical regions. Possibly al
super-optimisation. super-optimisation.
But even if we did this, and a program would improve/jit itself, the fruits of this work are only usable But even if we did this, and a program would improve/jit itself, the fruits of this work are only usable
during that run of tah program. Future invocations, just like future versions of that program do not during that run of that program. Future invocations, just like future versions of that program do not
benefit. And thus start again, just like in Groundhog day. benefit. And thus start again, just like in Groundhog day.
### Storage ### Storage
@ -60,12 +60,12 @@ change it's own executable/object files, in ruby even it's source. Theoretically
representation of the code to work on. representation of the code to work on.
In salama we do have an internal representation, both at the code level (ast) and the compiled code In salama we do have an internal representation, both at the code level (ast) and the compiled code
(MethodDefinition, Intructions and friends). (CompiledMethod, Intructions and friends).
#### Storage Format #### Storage Format
Going back to the Image we can ask why was it doomed to fail: because of the binary, Going back to the Image we can ask why was it doomed to fail: because of the binary,
propriotary implementation. Not because of the idea as such. proprietary implementation. Not because of the idea as such.
Binary data needs either a rigourous specification and/or software to work on it. Work, what work? Binary data needs either a rigourous specification and/or software to work on it. Work, what work?
We need to merge the data between installations, maintain versions and branches. That sounds a lot like We need to merge the data between installations, maintain versions and branches. That sounds a lot like
@ -75,14 +75,14 @@ people, but wasn't. I think it's fair to say that git was the first system to so
And git off course works with diff, and so for a 3-way merge to be successful we need a text format. And git off course works with diff, and so for a 3-way merge to be successful we need a text format.
Which is why i started with yaml, and which is why also sof is text-based. Which is why i started with yaml, and which is why also sof is text-based.
The other benefit is off course human readbility. The other benefit is off course human readability.
So now we have an object file * format in text, and we have git. What we do with it is up to us. So now we have an object file * format in text, and we have git. What we do with it is up to us.
(* well, i only finished the writer. reading/parsing is "left as an excercise for the reader":-) (* well, i only finished the writer. reading/parsing is "left as an excercise for the reader":-)
#### Sof as object file format #### Sof as object file format
Ok, i'll scetch it a little: Salama would use sof as it's object file format, and only sof would ever be Ok, i'll sketch it a little: Salama would use sof as it's object file format, and only sof would ever be
stored in git. For developers to work, tools would create source and when that is edited compile it to sof. stored in git. For developers to work, tools would create source and when that is edited compile it to sof.
A program would be a repository of sof and resource files. Some convention for load order would be helpful A program would be a repository of sof and resource files. Some convention for load order would be helpful