Re: Question about how to check a symbol is bound

Hello, if you are looking for record introspection capabilities, I would recommend looking into SRFI-99[1], which combines static structure definition and dynamic reflection APIs. You're example could look like this: (import (chicken format) srfi-42 srfi-99) (define-record-type egg-info

Re: Botan bindings

can do > anything earlier than that.) Have you made bindings for all the hashes and > block ciphers? > > -elf > > On 11 June 2023 02:59:23 GMT+03:00, Thomas Chust > wrote: > >Hello, > > > >Botan [1] is a pretty nice cryptographic library that I use from time t

Botan bindings

Hello, Botan [1] is a pretty nice cryptographic library that I use from time to time. Its documentation page on language bindings mentions that a CHICKEN binding is "wanted", so I thought: Why not ☺ You can find the code for the new egg here: https://chust.org/repos/chicken-botan

Re: Need GUI (again), gauging interest in an alternative approach.

t;> >>> -elf >>> >>> On 23 March 2023 02:36:43 GMT+02:00, Matt Welland < >>> mattrwell...@gmail.com> wrote: >>> >That would be great Thomas. For my part, I'll start working on my >>> project >>> >using what I can,

Re: Need GUI (again), gauging interest in an alternative approach.

, I like the tooling to generate a loadable module > >idea. I figure leverage as much of Godot as a tool as possible. > > > >Thanks. > > > >On Wed, Mar 22, 2023 at 12:27 PM Thomas Chust > >wrote: > > > >> Hello, > >> > >>

Re: Need GUI (again), gauging interest in an alternative approach.

Hello, a combination of CHICKEN and Godot sounds very interesting! I've been meaning to experiment more with that engine for a while, and with Godot 4.0 just out the door the time is probably perfect to try out the new extension APIs. I'm not completely sure how the CHICKEN/Godot hybrid should

Re: How best to get a default result from sqlite3, or to use or not use first-result?

Hello Matt, it may be a bit of an oversight that no such procedure exists in the SQLite3 egg, but you could define something like this: (define (one-result/default default db sql . parameters) (call-with-temporary-statements (lambda (stmt) (apply bind-parameters! stmt parameters)

Re: Blobs and GC

Am Sa., 10. Juli 2021 um 15:15 Uhr schrieb Aydar Zarifullin < aydar...@gmail.com>: > Hello everyone, I have a few questions: Is it safe to pass a blob created > in scheme to C functions? Will the garbage collector move it in memory? Is > there any guarantee that the garbage collector won't move

Re: [ANN] CHICKEN 5.2.0 release candidate 2 available

On Sun, 16 Feb 2020 09:10:46 +0100 Peter Bex wrote: > [...] > The second release candidate for CHICKEN 5.2.0 is now available for > download: > [...] > If you can, please let us know the following information about the > environment on which you test the RC: > [...] Hello, my results trying to

Re: Compilation Issues of IUP Egg in Chicken 5

On Thu, 16 Jan 2020 16:09:15 -0700 Jeff Moon wrote: > Found an issue while trying to install the IUP egg on chicken 5. The "-D > disable-iup-web" or "-feature disable-iup-web" does not seem to be > disabling the web portion of the module. When it get's installed, since we > don't have the

Re: [ANN] CHICKEN 5.2.0 release candidate available

On Sun, 12 Jan 2020 13:29:06 +0100 Peter Bex wrote: > [...] > We are happy to announce the first release candidate of the upcoming > CHICKEN 5.2.0. > [...] > Please give it a test and report your findings to the mailing list. > [...] Hello, Operating system: Linux Mint 18.3 (based on Ubuntu

Re: [Chicken-users] [ANN] CHICKEN 5.1.0 release candidate available

On Sat, 8 Jun 2019 15:07:34 +0200 Peter Bex wrote: > [...] > CHICKEN 5.1.0rc1 is now available at this location: > https://code.call-cc.org/dev-snapshots/2019/06/08/chicken-5.1.0rc1.tar.gz > [...] > Please give it a test and report your findings to the mailing list. > [...] Hello, testing the

Re: [Chicken-users] list of more than 2 elements is pair?

On Mon, 10 Dec 2018 11:48:56 + Paul Sika wrote: > [...] > I am trying a scheme tutorial using the chicken repl and i see that > (pair? '(1 2 3)) yields true. > is this normal ? > [...] Hello Paul, yes, this is perfectly normal: Every non-empty list satisfies the pair? predicate because

Re: [Chicken-users] Is Android not unix?

On Mon, 19 Nov 2018 13:19:10 +0300 Kristian Lein-Mathisen wrote: > [...] > I was trying tweetnacl on Termux on Android 9 and ran into this problem: > [...] Hello, a new version of tweetnacl (v1.4.1) should soon be available. Since I replaced the system-specific code dealing with entropy

Re: [Chicken-users] chicken-install package integrity/signing

Hello, implementing package signatures is technically not such a big deal (see the experimental example script here: https://paste.call-cc.org/paste?id=b5f6d4cce329d48d64eefbe0922b64aebb16a9e5 :-) But we need to decide who should be responsible for signatures and which keys should be trusted by

Re: [Chicken-users] openssl egg patch for default root certs

On Sun, 11 Nov 2018 23:35:08 -0600 Jim Ursetto wrote: > [...] > If you can find a better way I welcome it. My only request is that existing > eggs (particularly ones that call openssl through http-client) are able to > pull in the system default certs without changes to the eggs. It’s mainly

Re: [Chicken-users] Is Android not unix?

On Mon, 19 Nov 2018 13:19:10 +0300 Kristian Lein-Mathisen wrote: > [...] > I was trying tweetnacl on Termux on Android 9 and ran into this problem: > > u0_a191@localhost ~/p/chicken-5.0.0> > csi -R tweetnacl -p '(make-symmetric-sign-key)' > > Error: (read-u8vector) bad argument type - not a

Re: [Chicken-users] CHICKEN 5.0.0 release candidate 4 available

On Mon, 29 Oct 2018 18:14:31 +0100 Peter Bex wrote: > [...] > The fourth release candidate for CHICKEN 5.0.0 is now available for > download: > > https://code.call-cc.org/dev-snapshots/2018/10/29/chicken-5.0.0rc4.tar.gz > [...] > If you can, please let us know the following information about

Re: [Chicken-users] Right-click default menu under Chicken-Scheme

On Fri, 2 Nov 2018 11:25:15 -0700 Ritika Agrawal wrote: > [...] > My team was working on enabling iup:matrix for one of our tools. We noticed > with the Chicken scheme code, we see a default menu on right-click menu. > This default menu is not observed with equivalent Lua code. Can you please >

Re: [Chicken-users] CHICKEN 5.0.0 release candidate 3 available

On Mon, 8 Oct 2018 22:18:06 +0200 Peter Bex wrote: > [...] > The third release candidate for CHICKEN 5.0.0 is now available for > download: > [...] > Please give this new release candidate a try and report your findings > to the mailing list. Here's a suggested test procedure: > > $ make

Re: [Chicken-users] Understanding Chicken 5 build scripts.

On 12 Sep 2018 19:28:25 +0200 Jörg F. Wittenberger wrote: > [...] > since I learned how CHICKEN 5's chicken-install creates platform specific > build scripts, I wonder: why? > [...] Hello, it seems to me this approach could come in handy when you want to execute build steps on different

Re: [Chicken-users] [ANN] CHICKEN 5.0.0 release candidate 2 available

On Sun, 9 Sep 2018 14:30:12 +0200 Peter Bex wrote: > [...] > If you can, please let us know the following information about the > environment on which you test the RC: > [...] Operating system:Linux Mint 18.3 (based on Ubuntu 16.04) Hardware platform: x86-64 C Compiler:

Re: [Chicken-users] [Chicken-hackers] Some questions about CHICKEN 5 eggs and modules

On Wed, 29 Aug 2018 17:20:09 -0400 John Cowan wrote: > On Wed, Aug 29, 2018 at 4:21 PM wrote: > > > > I don't see the motivation for installing files outside of the chicken > > installation > > tree, so it is not clear to me what you want to achieve with this. > > > > From what I understand

Re: [Chicken-users] Some questions about CHICKEN 5 eggs and modules

On Wed, 29 Aug 2018 14:17:08 +0200 felix.winkelm...@bevuta.com wrote: > > [...] > > I can't say that I like this design decision, but I guess I'll have to > > live with it. If this is unsupported, it also feels strange that > > the .egg format allows specification of multiple import libraries per

Re: [Chicken-users] [Chicken-hackers] Some questions about CHICKEN 5 eggs and modules

On Wed, 29 Aug 2018 14:09:01 +0200 felix.winkelm...@bevuta.com wrote: > > [...] > > multiple sets of files may already be possible with multiple component > > forms in the .egg, but installation into any nested subdirectories relative > > to the CHICKEN installation prefix is currently not

Re: [Chicken-users] [Chicken-hackers] Some questions about CHICKEN 5 eggs and modules

On Wed, 29 Aug 2018 10:57:54 +0200 felix.winkelm...@bevuta.com wrote: > > As far as I understand the question (probably not really), a simple way to > > do this is to (foreign-declare "#include \"foo.c\"") and add foo.h to the > > source-dependencies of the file (see for example the simple-sha1

Re: [Chicken-users] Some questions about CHICKEN 5 eggs and modules

On Tue, 28 Aug 2018 20:40:33 +0200 felix.winkelm...@bevuta.com wrote: > [...] > I'll try to address some of your questions. > [...] Hello, thanks for taking the time to reply :-) > [...] > > - Some eggs install one extension library containing several modules. The > > new > > CHICKEN module

Re: [Chicken-users] [Chicken-hackers] Some questions about CHICKEN 5 eggs and modules

Hello, multiple sets of files may already be possible with multiple component forms in the .egg, but installation into any nested subdirectories relative to the CHICKEN installation prefix is currently not possible. For example, some include files provided with the protocol buffers egg would

Re: [Chicken-users] Crash in SRFI-69 eq?-hash

On Mon, 27 Aug 2018 21:23:16 +0200 ko...@upyum.com wrote: > [...] > This has been fixed in SRFI-69 0.3, hope it works fine for you now! > [...] Hello, thanks a lot, it works like a charm and allowed me to release a new version of the protocol buffers egg :-) Ciao, Thomas -- An altruist is

[Chicken-users] Some questions about CHICKEN 5 eggs and modules

Hello, playing with the new CHICKEN 5 module system and egg format raised a couple of questions in my head – perhaps someone on this list can provide a few answers :-) - Some eggs install one extension library containing several modules. The new CHICKEN module system always tries to load a

Re: [Chicken-users] Crash in SRFI-69 eq?-hash

On Sun, 19 Aug 2018 14:08:38 +0200 ko...@upyum.com wrote: > [...] > I checked the code and, for number types, only fixnums and flonums are > explicitely handled, other numeric types trigger an incorrect recursion. > > It seems we forgot to add support for the new numeric types to srfi-69 > when

Re: [Chicken-users] Crash in SRFI-69 eq?-hash

On Sun, 19 Aug 2018 10:25:44 +0100 Chris Vine wrote: > On Sun, 19 Aug 2018 03:40:26 +0200 > Thomas Chust wrote: > > [...] > > Then I realized that eq?-hash simply cannot be called on certain types > > of objects: > > [...] > > $ csi > > CHICKEN >

[Chicken-users] Crash in SRFI-69 eq?-hash

Hello, while trying to port some code from CHICKEN 4 to CHICKEN 5 I have just spent several hours tracking down a crash to a call of hash-table-ref/default for a table which happened to use eq? as the comparison function and was loaded with various types of objects as keys. Then I realized that

Re: [Chicken-users] [ANN] CHICKEN 5.0.0 release candidate 1 available

On Sat, 11 Aug 2018 11:43:58 +0200 Peter Bex wrote: > [...] > After many years of development, we are happy to announce the first > release candidate of the upcoming CHICKEN 5.0.0. This represents the > largest change in CHICKEN since the 4.0.0 release. > [...] Hello, thanks for all the hard

Re: [Chicken-users] case - should that even work?

On Sun, 15 Jul 2018 20:36:41 +0200 Martin Schneeweis wrote: > [...] > please can someone explain to me why the following even works? > > (define sym 'b) > > (case sym > ('a "an 'a'") > ('b "a 'b'") > ('c "a 'c'") > (else "something else")) ; -> a 'b' > [...] > I know the

Re: [Chicken-users] Chicken + IUP precompiled bundle for Raspbian (ARM) available.

On Mon, 9 Jul 2018 10:44:05 -0700 Matt Welland wrote: > [...] > However the IUP egg uses ffcall which doesn't work on GNURoot, presumably > because it is a chroot environment. > [...] Hello, to me it seems more likely that some security feature such as non-executable stack interferes with

[Chicken-users] Reason to Celebrate

Dear friends, hopefully you're all doing well! I have reason to celebrate: It has taken me some years, but I eventually defended my PhD thesis last winter and just now the bureaucratic followup is completed – I hold the official doctorate degree in my hands. Since this feels at least as good as

Re: [Chicken-users] [ANN] CHICKEN 4.13.0 release candidate available

On Tue, 5 Dec 2017 20:52:11 +0100 Peter Bex wrote: > [...] > If you can, please let us know the following information about the > environment you tested the RC tarball on: > [...] Hello, some results from the systems I use: Operating system: FreeBSD 12.0-CURRENT Hardware

Re: [Chicken-users] chicken hacking

Hello, this sounds like a fun idea. I could probably participate at any of the suggested dates, but so far I also have no idea how to get there other than by teleportation ;-) Ciao, Thomas On 2017-03-15 13:16, Juergen Lorenz wrote: > Hi all, > > last year, in Nuremberg, I asked some of you,

Re: [Chicken-users] numbers egg depends on libstdc++ and some questions

On 2017-02-25 10:12, Vasilij Schneidermann wrote: > [...] >> 1) Why does the numbers egg use libstdc++ ? Just curious. > > This is most likely due to Windows not really giving you a C compiler or > runtime. MSVCRT is actually a C++ runtime with loads of extern "C". > cl.exe is actually a C++

Re: [Chicken-users] New egg: sodium

On 2017-02-25 13:39, Caolan McMahon wrote: > [...] > The egg is a work in progress, but it already has a few useful procedures. > [...] Hello, in case you are missing some procedures, perhaps the source code of the tweetnacl egg may help as a template -- the tweetnacl egg includes the C backend

Re: [Chicken-users] Compiling a shared library from swig interface

On 2016-10-22 13:16, spalis wrote: > [...] > Error: (load) unable to load compiled module - ./example.so: undefined > symbol: _ZTV6Square: "./example.so" > [...] Hello, well, binutils tells us that $ c++filt _ZTV6Square vtable for Square So the shared object you built apparently does not link

Re: [Chicken-users] Compiling multiple modules into a single executable

On 2016-10-16 23:13, Josh Barrett wrote: > [...] > Can you generate a .import without compiling your module? > [...] Hello Josh, as far as I know, the .import.scm files are always generated as a side effect of compiling a source file. However, it may be possible to discard the primary results

Re: [Chicken-users] Compiling multiple modules into a single executable

On 2016-10-16 22:52, Josh Barrett wrote: > [...] > $ csc -c foo.scm bar.scm > > Syntax error (import): cannot import from undefined module > --- > As I understand it, this should work, but it obviously doesn't. Does > anybody know why? > [...] Hello, this cannot work because the compiler cannot

Re: [Chicken-users] iup egg seems to be incompatible with the latest release of iup

On 2016-09-29 19:12, Jeff Moon wrote: > [...] > I recently decided to try and get onto the latest version of IUP (3.19.1) > and it appears that the IUP developers have changed the name of or removed > one of the header files between 3.17 and 3.19.1. The missing file is > include/iup_pplot.h. >

Re: [Chicken-users] canvas-draw and colors

On 2016-07-16 21:31, Matt Welland wrote: > [...] > (define (vg:rgb->number r g b #!key (a 0)) (u32vector-ref > (blob->u32vector (u8vector->blob (list->u8vector (list a r g b 0)) > [...] Hello, this snippet seems somewhat sub-optimal to say the least. Apart from being needlessly complicated,

Re: [Chicken-users] extension loading in sqlite3 egg

On 2016-06-07 21:08, Kristian Lein-Mathisen wrote: > [...] > Thank you very much, Thomas! Works great for my purposes. Any chance of > giving this a new tag for release? > [...] Hello Kristian, I'll take your positive response as a successful test result and just add a tag to the sqlite3 egg ;-)

Re: [Chicken-users] extension loading in sqlite3 egg

On 2016-05-24 11:25, Kristian Lein-Mathisen wrote: > [...] > In the sqlite3 command-line, this works fine. The solution was to enable > extension loading which is not allowed by default: > https://www.sqlite.org/c3ref/enable_load_extension.html > > However, this Sqlite3 function isn't available

Re: [Chicken-users] strange IUP canvas behavior - mouse clicks returning bad value

On 2015-10-16 11:40, Matt Welland wrote: > [...] > this is failing on Ubuntu 15.04 but working ok on sles11. > [...] Hello, are the systems in question running on the same architecture? Do they have the same word size? My gut feeling says that the problem looks suspiciously like some calling

Re: [Chicken-users] iup cells draw callback

On 2015-10-15 04:04, Martin DeMello wrote: > [...] > it looks like the cb-draw callback has format "iiC", which doesn't > match the sigil regex. I take it that means callbacks with a Canvas* > argument are unsupported in chicken-iup? > [...] Hello Martin, that is correct, however support is

Re: [Chicken-users] [Q] Can I make port on byte array?

On 2015-10-07 03:04, Sungjin Chun wrote: > [...] > In Common Lisp, I can make a stream on byte array and can write > values on them, in Scheme, I think the equivalent stuff is port and > I'd like to write values on byte array using port. > [...] Hello, it sounds like you are looking for

Re: [Chicken-users] Incorrectly linked binaries with chicken-install -deploy

On 2015-08-14 04:43, Ryan Senior wrote: Does anyone have stand-alone application deployments working via chicken-install? I'm running into an issue where the binaries for my executables are in place, but they are linked to the system libchicken. [...] Hello, the libchicken.so.* is a dynamic

Re: [Chicken-users] Chicken works great on Debian noroot on android - any suggestions for best path for graphics?

On 2015-07-25 19:54, Matt Welland wrote: On Sat, Jul 25, 2015 at 2:28 AM, Jörg F. Wittenberger wrote: This assessment is surprising to me. Maybe I did not yet run into the issues? For a couple of days I've been trying this out. On debian/ARM. [...] Ah, I'll give it a try. For some

Re: [Chicken-users] openssl egg segfauls: ##sys#expand-home-path

On 2015-05-21 09:18, Kristian Lein-Mathisen wrote: I see, that sounds sensible. Could you apply the no-home-path-expansion patch and fix it upstream, so that openssl will work on 4.9.01? [...] Hello, I just checked and apparently the home path expansion stuff is still in place in released

Re: [Chicken-users] openssl egg segfauls: ##sys#expand-home-path

On 2015-05-19 13:35, Kristian Lein-Mathisen wrote: [...] It's been way too long! I'm running CHICKEN 4.9.0.1 and the openssl-egg segfaults at ssl-load-certificate-chain! and friends. I have two patches/suggestions: - remove home path expansion - use the pathname-expand egg [...] Hello,

Re: [Chicken-users] find-library only tests static libs on Windows?

On 2015-05-05 02:08, Matt Gushee wrote: [...] But I'm wondering why I needed to do that. Is there some reason why it would be a bad idea, or would not work, for find-library to test DLLs as well as static libs? [...] Hello, while I am no expert on windows linkage madness, my understanding

Re: [Chicken-users] malloc'd memory

On 2015-01-25 23:21, Alexej Magura wrote: If I have a function that returns a malloc'd pointer, or that needs to have a buffer malloc'd, is it more idiomatic to (1) malloc and free in the caller function (which is C's idiom, IIRC), or (2) malloc it in C and then just return the pointer for

Re: [Chicken-users] SRFI-99 - What is a variant type?

On Mon, 15 Dec 2014, Bahman Movaqar wrote: Reading the docs on SRFI-99 [1], I need some help understanding what is a variant type. Would someone please pass me a relevant link to read? Hello, a variant type is the same as an extensible tagged union type. Some documentation about this

Re: [Chicken-users] Difference in behaviour with code compiled with csc and code run with csi.

On Sat, 6 Dec 2014, Joe Python wrote: I was experimenting with a coroutine example which i got from the c2 website. see link below for code. http://paste.call-cc.org/paste?id=cf4489b9de4820b330dc34371ea3b73a18115a4b#a0 I get the expected output when I run the code using csi [...] However when

Re: [Chicken-users] [Q] How can I convert this lisp(SBCL) macro to chicken scheme?

On Fri, 7 Nov 2014, Moritz Heidkamp wrote: NeXT chu...@gmail.com writes: Thank you, what I miss from clojure is its uniform or homoiconic(?) style of sequence accessing; so one does not have to check current sequence is whether list or vector or others. I'd like to create macro or something

Re: [Chicken-users] Linking object files without additional source

On Sat, 1 Nov 2014, Richard wrote: [...] That is not how you link objects files. You could create an archive for this purpose using: ar rc foreign-interfaces.a sources/foreign-interfaces/fastcgi.o sources/foreign-interfaces/sqlite.o [...] Hello, if your linker supports that, it may also be

Re: [Chicken-users] OpenSSL egg option defaults poll

On Tue, 28 Oct 2014, Florian Zumbiehl wrote: [...] I am not sure I understand what you mean--you never can protect against a client that doesn't want to protect the session, they always could just publish the session key, or the decrypted data, or whatever. The protection should always focus on

Re: [Chicken-users] OpenSSL egg option defaults poll

On Tue, 28 Oct 2014, Florian Zumbiehl wrote: [...] Regarding specific improvements: [procedure] (ssl-make-client-context* #!key ((protocol symbol) 'tls) ((cipher-list string|list) HIGH) ((certificate-authorities string) #f) ((certificate-authority-directory string) #f)

Re: [Chicken-users] OpenSSL egg option defaults poll

On Mon, 27 Oct 2014, Andy Bennett wrote: [...] I'd be glad if some of you could test this out and tell me what you think about it :-) Can you give some tips for how to test this from a spiffy applications? I usually just pass in ssl-accept instead of tcp-accept. [...] Hello, actually I

Re: [Chicken-users] file-separator, path-separator

On Sun, 26 Oct 2014, Sascha Ziemann wrote: [...] what is the Chicken equivalent of Java's File.separator [...] and File.pathSeparator: [...] Hello Sascha, as far as I know, the CHICKEN core library doesn't provide equivalent definitions and the code you included in your mail to define

Re: [Chicken-users] OpenSSL egg option defaults poll

On Thu, 16 Oct 2014, Thomas Chust wrote: [...] So I would like to poll for opinions from people on this list concerning this situation. Do you think the default options in the OpenSSL egg should be hardened? Do you think more options should be introduced? Is compatibility with the rest

Re: [Chicken-users] OpenSSL egg option defaults poll

On Thu, 16 Oct 2014, Sascha Ziemann wrote: [...] I think it is a good idea to make TLS the default. [...] I think it is sufficient to enable SSL with a parameter or environment variable. I propose: I_DONT_CARE_ABOUT_SECURITY=yes [...] ... and there I was thinking that was implicit in the

Re: [Chicken-users] OpenSSL egg option defaults poll

On Thu, 16 Oct 2014, Florian Zumbiehl wrote: [...] I just wanted to point out that we still have a bunch of patches lying around that among other things implement security improvements: openssl: add support for TLS 1.1 and 1.2 openssl: add functions ssl-set-reneg-legacy-server-connect!,

[Chicken-users] OpenSSL egg option defaults poll

Hello, Mario Domenech Goulart raised the issue that the OpenSSL egg by default creates connections that can use any of the SSLv2, SSLv3 or TLSv1.x protocols, depending on the capabilities of the remote peer. This default is not particularly secure, especially when considering the recently

Re: [Chicken-users] OpenSSL egg option defaults poll

On Thu, 16 Oct 2014, Andy Bennett wrote: [...] Having said that, I'm not sure which clients on which operating systems are SSL 3.0 only. [...] Hello Andy, if I understand the situation correctly, almost nobody uses SSLv3 since it was quickly superseded by the newer TLS variants. But the

Re: [Chicken-users] Implementing a C-API to a chicken library

On Fri, 2014-05-09 at 16:56 +0200, Isak Andersson wrote: [...] Basically I want to define a C API (because that's easy to call from all languages) that will be used on many platforms (ios, android, winrt, windows, osx etc). [...] Hello Isak, what you want to do should indeed be possible

Re: [Chicken-users] lambda's in a hash table

On 2014-04-05 01:54, Claude Marinier wrote: [...] I would like to have the compiler do some of this for me. I probably cannot write a literal hash table but I expected to be able to write a literal association list. I have tried this but it does not work. [...] (define a-list `( (dot

Re: [Chicken-users] Question about (use numbers)

On 2014-03-02 17:20, Daniel Carrera wrote: On 2 March 2014 17:00, Matt Gushee m...@gushee.net wrote: [...] Does this mean that I am loading the module wrong? [...] No. The numbers egg redefines all the standard arithmetic 'operators' [...] Ok. Does this also mean that there is no way to

Re: [Chicken-users] assigning scheme object to foreign pointer

On 2013-12-16 00:59, pluijzer wrote: [...] I am using a C-library that lets you assign user data to objects via a void pointer. I would like to assign a scheme object to this pointer, but as I understand I cannot use 'object-pointer' for this, as the garbage collector might move the

Re: [Chicken-users] assigning scheme object to foreign pointer

On 2013-12-16 00:59, pluijzer wrote: [...] I am using a C-library that lets you assign user data to objects via a void pointer. I would like to assign a scheme object to this pointer, but as I understand I cannot use 'object-pointer' for this, as the garbage collector might move the

Re: [Chicken-users] Chicken C interface

On 2013-06-05 23:36, Felix wrote: From: Dan Leslie d...@ironoxide.ca [...] Basically, use C_alloc to allocate the memory required to host both the List structure and the data it is to contain, then use the C_list macro to patch it all together. Note that this code is not correct: C_alloc

Re: [Chicken-users] Chicken C interface

On 2013-06-06 11:46, Kristian Lein-Mathisen wrote: [...] From what I understand, this is exactly what foreign-primitive does: wraps C_return in a CPS, keeping the stack-allocation alive. [...] Hello, well, kind of. Since compiled CHICKEN code is fully CPS transformed you don't wrap

Re: [Chicken-users] Chicken C interface

On 2013-06-06 12:13, Kristian Lein-Mathisen wrote: [...] I didn't know foreign-lambda were the one that had to do the CPS-conversion. Does that mean there is a small performance overhead when using foreign-lambda as opposed to just foreign-primitive? [...] Hello, the overhead is roughly one

Re: [Chicken-users] Chicken C interface

On 2013-06-06 12:19, Felix wrote: From: Thomas Chust ch...@web.de [...] when I first saw that code I thought that this must be incorrect, too. Then I checked the CHICKEN documentation for foreign-safe-lambda and read: This is similar to foreign-lambda, but also allows the called

Re: [Chicken-users] Chicken C interface

On 2013-06-06 12:34, Felix wrote: From: Thomas Chust ch...@web.de [...] So what about allocating locally and not returning an object but passing it to a Scheme callback from inside a foreign-safe-lambda? Is that ok or can it happen that the callback stores this object away but never copies

Re: [Chicken-users] Chicken C interface

On 2013-06-05 19:50, Peter Bex wrote: [...] There is no C_listp predicate because you can't directly check an object for being a list; you must check whether it's C_SCHEME_END_OF_LIST (then it is a list). Otherwise, if it's a pair you take its cdr and loop. If it's something else, it's not

Re: [Chicken-users] Chicken C interface

On 2013-06-05 20:11, Peter Bex wrote: On Wed, Jun 05, 2013 at 07:57:49PM +0200, Thomas Chust wrote: but it's trivial to detect cyclic lists during the traversal using either a set of seen elements or just two iteration pointers travelling at different speeds. In C that's rather painful

Re: [Chicken-users] Protocol Buffers for CHICKEN

On 2013-05-30 22:32, Felix wrote: [...] Very good - thanks a lot! I'll give this a try. Should we simply replace the serialization or do you think it would make sense to let the user choose a serialization mechanism for suspensions? [...] Hello Felix, I'm not sure the suspension egg needs a

[Chicken-users] Protocol Buffers for CHICKEN

Hello, during the CHICKEN spring thing in Cologne I started to work on a new egg [1] implementing the protocol buffer [2] serialization format, which is now in a usable and tested state. If you don't need or want to use a specific schema for your data, you can use the protobuf egg as a generic

Re: [Chicken-users] Protocol Buffers for CHICKEN

On 2013-05-29 00:32, Dan Leslie wrote: [...] I wonder if this would be useful for storing data in a posix shared memory block... [...] Hello Dan, that is certainly possible, you would just combine serialize and call-with-output-string to obtain data you can copy into a shared buffer and

Re: [Chicken-users] Best way to share memory between C and Chicken

On 2013-05-05 13:54, Felix wrote: [...] SRFI-4 vectors live in the normal, heap that is subject to garbage collection, [...] But note that the SRFI-4 constructors accept an optional argument which specifies that the vector should be allocated in static, non-GC'd memory. [...] Ah, cool.

Re: [Chicken-users] Best way to share memory between C and Chicken

On 2013-05-03 20:04, Pedro Melendez wrote: [...] I am developing a prototype of a server that would serve 3D seismic images across the network. [...] Hello Pedro, it's nice to see I'm not the only geophysicist who likes to use Scheme :-) [...] Giving the size of the file, I want to share

Re: [Chicken-users] Best way to share memory between C and Chicken

On 2013-05-04 00:26, Ivan Raikov wrote: [...] I really strongly advise _against_ using SRFI-4 vectors for 4G files, as I have experienced serious performance issues even with vectors of a few million elements. [...] Hello, would that be related to the fact that CHICKEN has a copying garbage

Re: [Chicken-users] Chicken as extension language

Hello, you may want to check the documentation on embedding CHICKEN into other applications: http://wiki.call-cc.org/man/4/Embedding To make the embedded CHICKEN interpreter useful, you may have to expose functions from CHICKEN to the hosting application, which is easily accomplished

Re: [Chicken-users] scheme student perplexed by failures ...

On Sat, 11 Aug 2012, john saylor wrote: [...] and here is my propsed solution: define js-reverse (lambda (ls) ((reverse-rec ls '() [...] Hello John, your code above lacks an opening paranthesis before the define and it has an extraneous pair of parentheses around the call to

Re: [Chicken-users] Printing procedures returned from call/cc

On Tue, 31 Jul 2012, Jeronimo Pellegrini wrote: [...] I was wondering why this happens in Chicken (recent checkout from git): (let ((lst (call/cc (lambda (x) (print 'something) (call/cc (lambda (y) (list x y)))

Re: [Chicken-users] IUP

Andy Bennett wrote: [...] ...there doesn't seem to be a libwebkit for Debian Wheezy: only a gtk version so I tried to disable all the web stuff in the iup.setup file. [...] Hello Andy, the GTK+ WebKit library is probably the right one unless you built IUP against Motif instead of GTK+. But

Re: [Chicken-users] Can't install Spock

Дмитрий wrote: [...] \usr\local\bin\csc -feature compiling-extension -setup-mode-S -O3 -d0 -feature standalone chicken-spock.scm -o chicken-spock chicken-spock -library-path spock -optimize -library -o library.js cat config.js runtime.js library.js spock/spock-runtime.js

Re: [Chicken-users] Problems with rationals

On Mon, 2012-04-09 at 21:00 +0100, Mark Carter wrote: Is this a bug in chicken? (rational? 6/10) = #f Also (* 1.0 5/2) produces Error: (*) bad argument type: 5/2 [...] Hello, this looks strange. While CHICKEN does not support exact fractions out of the box, reading a number

Re: [Chicken-users] chicken-install doesn't install compiled submodules

On Sat, 2012-03-24 at 20:20 +0100, Christian Kellermann wrote: * Juergen Lorenz j...@jugilo.de [120324 11:42]: Hello all, when installing (via chicken-install) a module with a number of submodules (for example iup) I noticed, that the submodules are only installed as *.import.scm,

Re: [Chicken-users] chicken-install doesn't install compiled submodules

On Sun, 2012-03-25 at 15:46 +0200, Christian Kellermann wrote: [...] (define import-libraries `(iup.import.so iup-base.import.scm iup-controls.import.scm iup-dialogs.import.scm ,@(cond-expand So you are explicitly giving it .scm files to install.

Re: [Chicken-users] amb egg bug/confusion

On Wed, 2012-03-14 at 18:23 -0600, Alan Post wrote: [...] (pretty-print (let ((s (amb 0 1 2))) (amb-collect s))) [...] produces: [...] (0) [...] Hello, to me this behaviour looks correct. amb-collect is supposed to collect all the different values its argument can take on, but in your

Re: [Chicken-users] Can't import iup-web

On Mon, 2012-03-12 at 14:05 -0600, Matt Gushee wrote: [...] $ csi [...] csi (use iup) [...] csi (use iup-web) ; loading /usr/lib/chicken/6/iup-web.import.scm ... [...] Hello, you are using the egg incorrectly. The iup library contains all the iup-related modules including iup-web.

Re: [Chicken-users] foreign: Why is passing structs as arguments and return-types not supported?

On Wed, 2012-02-29 at 14:07 +0100, Kristian Lein-Mathisen wrote: [...] Reading the chicken docs on foreign, you'll find: Structs cannot be directly passed as arguments to foreign functions, nor can they be result values.

Re: [Chicken-users] [ANN] BerkeleyDB binding

2011/10/17 Andy Bennett andy...@ashurst.eu.org: [...] during the past days I've written a small binding for the BerkelyDB library. [...] How does licensing of this work? I understand that BDB is available under the GPL for certain uses. Does your work get infected with that or is it

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