Re: [Chicken-users] Bounty for an egg or two.
Thanks Ivan and Felix for taking a look. FastGEO looks promising, I'll dig a little deeper into it. Can you comment on how tough creating an interface to gpc would be? I see that it has Haskell, Java, Lua, Octave, Perl, Python etc. bindings which might indicate it is a bit easier to interface to than cgal. http://www.cs.man.ac.uk/~toby/alan/software//index.html#gpc On Sunday 04 April 2010 05:45:16 pm Ivan Raikov wrote: I don't know about Ogre3D, but I also found cgal to have an especially FFI-unfriendly API. Speaking of computational geometry libraries, I came across a library called FastGEO: http://www.partow.net/projects/fastgeo/index.html It is written in Object Pascal, but I found its interface to be quite simple, and I think it would not be altogether difficult to either port it to Scheme, or compile it with cdecl calling convention and use Chicken's FFI to call its procedures. -Ivan Felix fe...@call-with-current-continuation.org writes: From: Matthew Welland m...@kiatoa.com Subject: [Chicken-users] Bounty for an egg or two. Date: Thu, 1 Apr 2010 21:53:52 -0700 I'd like some help in getting some eggs made: 1. An interface to cgal 2. An interface to Ogre3d Phew - these are heavyweight and it seems that they use templates extensively. I don't think Swig is the right way to go, though: I don't know if the chicken backend is actively maintained, and it is not ported to chicken 4 yet, AFAIK. cheers, felix ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Bounty for an egg or two.
Hi Matt, The URL you have included below points to the home page of the General Polygon Clipper, a different library unrelated to FastGEO. As for FastGEO, it can be compiled by the Free Pascal Compiler, which can compile procedures to use the C calling convention, but beyond that I don't know if there would be any issues involved. I would think that it should be fairly straightforward to compile FastGEO with C calling convention and see if you get any errors. Another thing is that I found the FastGEO source code to be quite clear and readable, so it might be easier to port some of its procedures to Scheme, using SRFI-4 vectors and appropriate record types. This might be simpler than messing around with the Pascal code. -Ivan Matthew Welland m...@kiatoa.com writes: Thanks Ivan and Felix for taking a look. FastGEO looks promising, I'll dig a little deeper into it. Can you comment on how tough creating an interface to gpc would be? I see that it has Haskell, Java, Lua, Octave, Perl, Python etc. bindings which might indicate it is a bit easier to interface to than cgal. http://www.cs.man.ac.uk/~toby/alan/software//index.html#gpc On Sunday 04 April 2010 05:45:16 pm Ivan Raikov wrote: I don't know about Ogre3D, but I also found cgal to have an especially FFI-unfriendly API. Speaking of computational geometry libraries, I came across a library called FastGEO: http://www.partow.net/projects/fastgeo/index.html It is written in Object Pascal, but I found its interface to be quite simple, and I think it would not be altogether difficult to either port it to Scheme, or compile it with cdecl calling convention and use Chicken's FFI to call its procedures. ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
[Chicken-users] objc egg in 4.4.0
Hi, Is the objc egg supposed to work with Chicken 4.4.0, or is it still unsupported in the 4.x releases? It doesn't compile for me on a Mac OS X 10.6.3 system; see http://paste.lisp.org/display/97337 for the output. thanks d ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
[Chicken-users] Documentation problem (eggs tutorial and Extensions section from the manual)
Hello! I've tried to follow the instructions on the egg tutorial here: http://chicken.wiki.br/eggs%20tutorial and the Extensions part of the manual: http://chicken.wiki.br/man/4/Extensions But that didn't work. I compared the instructions and example there to what's on some eggs in the svn repository, and found some differences. It looks like the egg now *must* be a module or the -j option to the compiler won't work (right?). And if I don't use -j so as not to generate the import file, then I won't be able to load the extension (and the example in the Extensions chapter won't really work). #;1 (require-extension hello) Error: (import) during expansion of (import ...) - cannot import from undefined module: hello Call history: syntax(##core#require-extension (hello) #t) syntax(##core#begin (##core#begin (##core#begin (##sys#require (quote hello))) (import hello)) (##core#und.. syntax(##core#begin (##core#begin (##sys#require (quote hello))) (import hello)) syntax(##core#begin (##sys#require (quote hello))) syntax(##sys#require (quote hello)) syntax(quote hello) syntax(##core#quote hello) syntax(import hello) -- The eggs tutorial doesn't mention that (neither does chapter Using the Compiler from the manual). It seems that the documentation is for Chicken 3; I am not sure if I understand everything that changed in the compiler since the docs were written, otherwise I'd be happy to help updating the manual and eggs tutorial. Are these the only changes? J. ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Documentation problem (eggs tutorial and Extensions section from the manual)
On Mon, Apr 05, 2010 at 09:06:37AM -0300, Jeronimo Pellegrini wrote: Hello! I've tried to follow the instructions on the egg tutorial here: http://chicken.wiki.br/eggs%20tutorial and the Extensions part of the manual: http://chicken.wiki.br/man/4/Extensions But that didn't work. I compared the instructions and example there to what's on some eggs in the svn repository, and found some differences. It looks like the egg now *must* be a module or the -j option to the compiler won't work (right?). This doesn't really have anything to do with eggs. There was no -j in Chicken 3, and in Chicken 4 you use -j modulename to create an import file for the module named modulename. Since it's good practice (but not required!) to package eggs that provide modules, you'll have to add a -j modulename in order to make it work. Of course, the semantics of (USE foo) changed so it will try to load foo and also import the module foo, you'll run into trouble unless you either provide a module or switch to (REQUIRE-LIBRARY foo) which will only load the .so file without importing anything. The eggs tutorial doesn't mention that (neither does chapter Using the Compiler from the manual). The chapter Modules and macros will be more helpful in that area. It seems that the documentation is for Chicken 3; I am not sure if I understand everything that changed in the compiler since the docs were written, otherwise I'd be happy to help updating the manual and eggs tutorial. It might have not been updated properly. It's a good idea to add some instructions on providing a module to the tutorial. Feel free to add it. Are these the only changes? AFAIK nothing really changed, except the difference in how USE works. Cheers, Peter -- http://sjamaan.ath.cx -- The process of preparing programs for a digital computer is especially attractive, not only because it can be economically and scientifically rewarding, but also because it can be an aesthetic experience much like composing poetry or music. -- Donald Knuth ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
[Chicken-users] Is there interest in a new egg (fast-io)?
Hello, I've been working on some unsafe fast I/O procedures for my own use, and I thought I'd make them an extension, if more people would like to use them. The fast-io extension would have these procedures: Implemented and tested: - write-fixnum, read-fixnum - write-flonum, read-flonum - write-one-char, read-one-char (I don't know if the names are OK; I didn't want them to conflict with R5RS procedures) Implemented, not tested: - write-complex, read-complex Planned but not yet implemented: - write-string - read-string-n - read-string-until (reads until a delimiter is found) - read-string-between (ignores characters until left delimiter, then reads until right delimiter) All of these are implemented using (as little as possible) foreign-lambda* with some inline calls to fprintf, fscanf, and fgetc. The only kind of error checked for is the return from the C functions (and if, for example, fscanf fails to read, then a (configurable) scheme error procedure is called). The two last string-reading procedures will be triple-checked for security. :-) Why: For everyday use, I really think this isn't necessary. But if you need (as I think I'll need) to read and write very large amounts of numbers from/to files, several times. Then this becomes useful. If you *know* that your file only has fixnums or flonums (written by your program), then you can use these procedures -- so there's no need to make the program go checking if it looks like an exact or inexact number, or as a string, or whatever. Just tell it to read an integer number!) If there is interest, it's already packaged as an egg (installed on my machine). The speedup I got is on the following table: schemefast-io speedup --- write fixnum14.602 5.3032.7535 read fixnum58.208 11.7064.9725 write flonum37.003 21.6471.7094 read flonum 100.367 15.6266.4231 --- These are for reading and writing values from/to large files. I'll include the benchmarking code with the egg, as well as tests. Thanks, J. ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Documentation problem (eggs tutorial and Extensions section from the manual)
Hi, On Mon, Apr 05, 2010 at 02:16:24PM +0200, Peter Bex wrote: This doesn't really have anything to do with eggs. There was no -j in Chicken 3, and in Chicken 4 you use -j modulename to create an import file for the module named modulename. Since it's good practice (but not required!) to package eggs that provide modules, you'll have to add a -j modulename in order to make it work. Of course, the semantics of (USE foo) changed so it will try to load foo and also import the module foo, you'll run into trouble unless you either provide a module or switch to (REQUIRE-LIBRARY foo) which will only load the .so file without importing anything. Ah -- I get it now! It seems that the documentation is for Chicken 3; I am not sure if I understand everything that changed in the compiler since the docs were written, otherwise I'd be happy to help updating the manual and eggs tutorial. It might have not been updated properly. It's a good idea to add some instructions on providing a module to the tutorial. Feel free to add it. OK. Thanks a lot, Peter! J. ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Is there interest in a new egg (fast-io)?
Jeronimo Pellegrini scripsit: - write-fixnum, read-fixnum - write-flonum, read-flonum Does this refer to a textual or a binary format file? -- John Cowan co...@ccil.org http://ccil.org/~cowan In computer science, we stand on each other's feet. --Brian K. Reid ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Is there interest in a new egg (fast-io)?
On Mon, Apr 05, 2010 at 10:34:03PM -0400, John Cowan wrote: Jeronimo Pellegrini scripsit: - write-fixnum, read-fixnum - write-flonum, read-flonum Does this refer to a textual or a binary format file? Textual. I had no intention of using binary files, although that could be nice too (saves space and could be somewhat faster, since disk access is the bottleneck). J. ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
Re: [Chicken-users] Is there interest in a new egg (fast-io)?
On Mon, Apr 5, 2010 at 7:18 PM, Jeronimo Pellegrini j...@aleph0.info wrote: Implemented and tested: - write-fixnum, read-fixnum - write-flonum, read-flonum For those I have been making good use of the endian-port egg (not released for chicken 4 yet though); I wonder how the benchmarks would turn out, but the implementation seems like it should be fast. Sounds like you have some unique ideas for strings though. ___ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
