Looks really good. Thanks for another great library! On 23 November 2010 21:12, Moritz Ulrich <ulrich.mor...@googlemail.com>wrote:
> I would go for the vector. It's easier than writing (ordered-map ...) all > the time. If you want to generate structs dynamically, you would even simply > create a vector of alternating pairs and do (apply ordered-map my-vec). > > Btw: Great library! I think I will rewrite my binary-parser from a project > of mine to use this library! > > > On Tue, Nov 23, 2010 at 9:24 PM, Zach Tellman <ztell...@gmail.com> wrote: > >> Good question. The solution didn't make the cut for my initial >> release, but will be added soon. My plan is to have an (ordered- >> map ...) frame which encodes and decodes the keys in the given order. >> So for C interop, the frame would be >> >> (ordered-map :a :int16, :b :float32) >> >> An alternative would be to just turn any vector which is alternating >> keys and types into an ordered-map, but that seems a bit too magical. >> >> Zach >> >> On Nov 23, 12:12 pm, Chris Perkins <chrisperkin...@gmail.com> wrote: >> > On Nov 23, 12:03 pm, Zach Tellman <ztell...@gmail.com> wrote: >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > > When writing Calx [1], I discovered it was a huge pain to deal with >> > > mixed C datatypes in Java. When writing Aleph [2], I discovered the >> > > problem increases by a factor of ten when dealing with streams of >> > > bytes. In an attempt to alleviate my own pain, and hopefully help a >> > > few other people out, I've written Gloss, which can transform a simple >> > > byte-format specification into an encoder and streaming decoder. >> > >> > > A full writeup can be found athttps://github.com/ztellman/gloss/wiki. >> > >> > > A few people have already asked me how this differs from protocol >> > > buffers, so I'll preemptively answer that protocol buffers are a fixed >> > > format that cannot be used to interface with external systems. Gloss >> > > is less performant than protocol buffers, but is also much less picky >> > > about formats. >> > >> > > If anyone has any questions, I'd be happy to answer them. >> > >> > Looks very useful, Zach. Thanks. >> > >> > I have a question. >> > >> > I have only taken a quick look, so maybe I'm misunderstanding the >> > intent, but it's not clear to me how you would use this for sending >> > and receiving structured data from, say, a C program. >> > >> > Taking your example from the wiki: >> > >> > (def fr (compile-frame {:a :int16, :b :float32})) >> > >> > Let's say I want to talk to a C program that speaks in structs, like >> > this: >> > >> > struct Foo { short a; float b; } >> > >> > The problem is, the C program cares about order - the short comes >> > before the float. How does the Clojure program know what order I need >> > the fields in, since I have specified the format with a map; an >> > unordered data structure? Is there another way to specify a structure >> > where order of the fields matters? If so, why have two ways of doing >> > it? Or am I just missing something? >> > >> > Thanks, >> > >> > - Chris >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clojure@googlegroups.com >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+unsubscr...@googlegroups.com<clojure%2bunsubscr...@googlegroups.com> >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> > > > > -- > Moritz Ulrich > Programmer, Student, Almost normal Guy > > http://www.google.com/profiles/ulrich.moritz > BB5F086F-C798-41D5-B742-494C1E9677E8 > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com<clojure%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
