April 2007 - cffi-devel - mailman3.common-lisp.net

[cffi-devel] cffi-sys::default-encoding returns nil on clisp/mingw
by Jack Unrue 01 May '07

01 May '07

Running CLISP on my system with the newtypes branch, I find that the CFFI-SYS::DEFAULT-ENCODING function is returning NIL. Some poking around reveals that CUSTOM:*FOREIGN-ENCODING* is set to #<ENCODING CHARSET:CP1252 :DOS> I looked at the symbol values for everything in the :charset package, and they all specify :UNIX instead of :DOS and so that's what CFFI-SYS::*ENCODINGS* and CFFI-SYS::*CLISP-ENCODINGS* get populated with. So I can see why DEFAULT-ENCODING is returning NIL. Before I head over to clisp-devel and ask about this, I just wanted to see whether this situation surprises anyone here, or if you think it might be a CLISP build configuration issue (which would be funny because I'm one of the MingW package maintainers), or ??? For instance, can anyone point me at a spot in the CLISP manual that states that *FOREIGN-ENCODING* will always correspond to the value of one of the symbols in the :charset package? This is on WinXP SP2, CLISP 2.41 (mingw special) with nothing related to encoding for command-line arguments. -- Jack Unrue

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[cffi-devel] [SPAM] FROM: MR. MIKE EDWARD
by FROM＠common-lisp.net 23 Apr '07

23 Apr '07

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[cffi-devel] Patch that adds an example of arrays to the documentation of defcstruct
by Ignas Mikalajunas 17 Apr '07

17 Apr '07

Hi, some users are not very attentive when reading documentation and rely on examples so i just though that it would be useful to have an example of an array defined as a member of a c struct in the manual. Ignas

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[cffi-devel] Road to 0.9.3 (and encoding issues)
by Luis Oliveira 17 Apr '07

17 Apr '07

Hello, The cffi-newtypes branch[1] is getting huge (~30 patches), and since it seems nobody has complained much about the new type system, I'd like to push it into the main branch along with the encoding support and other minor features and bugfixes that have accumulated over last ~2 months. Any objections? Then, after some remaining issues are fixed, I'd like to release 0.9.3. So here's my TODO list for 0.9.3: - <http://article.gmane.org/gmane.lisp.cffi.devel/1033> Figure out whether any of those issues are critical. The only change I've made to the typesystem since I wrote that message was a new :class option to DEFSTRUCT; - iron out some issues with the new encoding support (see below, this might take a while); - finish the documentation of the new features; - integrate cffi-grovel into the CFFI tree and document it. There are some issues with the current encoding support though: - James' original code had a CFFI-SYS:DEFAULT-ENCODING function which would use some implemention-specific way of determining what the default encoding should be. Every implementation had a different way of determining that, so I though that simply picking one ourselves (say, :utf-8) would be better. Also, I changed that to be a special variable instead. That way *DEFAULT-FOREIGN-ENCODING* can be bound to something else and affect the behaviour of the :string type and other string operations that don't explicitely specify an encoding. (E.g., the behaviour of :STRING would be influenced at run-time by the value of *D-F-E* whereas (:STRING :ENCODING :UTF-8) would not.) - Allegro's %lisp-string-into-foreign overflows. Allegro's EXCL:STRING-TO-NATIVE doesn't take a bufsize argument. Another problem is that Allegro's %lisp-string-octet-length isn't very effective otherwise it'd be easier to check for an overflow. Anyway, this is not the worst issue. - Corman, SCL and ECL support is broken, not necessarily because of the new string stuff. Also, a recent 1.1 snapshot of OpenMCL with unicode support is necessary; is this a problem? Last but definitely not least, there's a huge problem with error semantics. Everything works fine until you try to, e.g. convert a #\λ into iso-8859-1. Or #\ç into ascii. Some Lisps treat ascii as a synonym for iso-8859-1. Some silently substitute inconvertible characters with #\? (or #\Sub) while others will raise an exception. Of those that do raise exceptions, some provide a use-value substitution restart, others don't. To sum it up, it's horribly inconsistent. Before forward porting James's cffi-encondings branch, we discussed the possibility of doing the enconding conversion in portable CL, like what flexi-streams does for instance. I'm beginning to reconsider this idea. One the one hand it would mean introducing a dependency for CFFI, on the other hand it would provide consistent semantics across the various Lisps (including useful semantics for lisps that don't support unicode) we support and simplify CFFI-SYS. Any thoughts? [1] http://common-lisp.net/~loliveira/darcs/cffi-newtypes/ -- Luís Oliveira http://student.dei.uc.pt/~lmoliv/

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[cffi-devel] problem "asdf:loading" cffi
by Jonathan Johansen 16 Apr '07

16 Apr '07

Hi All, I'm trying to compile the current version of CFFI (0.9.2) in Clisp (2.39) on Ubuntu with asdf. I entered: (asdf:oos 'asdf:load-op :cffi) It then proceeded to load cffi.asd with no problems, and loads utils.fas, features.fas and cffi-clisp.fas without problems, and then complains in the following way: *** - READ: input stream #<INPUT BUFFERED FILE-STREAM CHARACTER #P"/var/cache/common-lisp-controller/1000/clisp/local/home/jon/code/ systems/cffi_0.9.2/src/package.fas" @1> has reached its end Does anyone know why this happens? (If I should go ask this question on the clisp or asdf mailing list, I welcome your directions :). Yes, I'm a newbie. If more information is needed, I'm happy to oblige. Regards, Jonathan Johansen framlingham(at)gmail(dot)com

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[cffi-devel] translate-type-from-foreign
by Sean 15 Apr '07

15 Apr '07

Hi all, I've noticed that in the upgrade from cffi 0.9.1 to 0.9.2 that there were a few lines removed from early-types.lisp namely : -;; Default Translators for foreign-struct-type -(defmethod translate-type-from-foreign (value (type foreign-struct-type)) - (translate-from-foreign value (name type))) - -(defmethod translate-type-to-foreign (value (type foreign-struct-type)) - (translate-to-foreign value (name type))) I've been specialising translate-to-foreign to automatically convert c structures to their equivalent lisp counterparts but without these lines this obviously no longer works. Was this removal deliberate and if so what is the preferred way to accomplish this? Cheers, Sean. -- ...Please don't assume Lisp is only useful for Animation and Graphics, AI, Bioinformatics, B2B and E-Commerce, Data Mining, EDA/Semiconductor applications, Expert Systems, Finance, Intelligent Agents, Knowledge Management, Mechanical CAD, Modeling and Simulation, Natural Language, Optimization, Research, Risk Analysis, Scheduling, Telecom, and Web Authoring just because these are the only things they happened to list. Kent Pitman.

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14 Apr '07

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[cffi-devel] Re: [Openmcl-devel] Problems with CFFI and Openmcl on Mac/Intel
by Henry Irvine 12 Apr '07

12 Apr '07

On Apr 11, 2007, at 10:38 PM, Gary Byers wrote: > Are you trying to load a 32-bit foreign library in a 64-bit lisp ? > (I don't know what "libtest.so" is, but the value of CFFI::ARGUMENTS > in frame 0 makes me wonder about that.) > > If this is the problem, I imagine that the CFFI test suite has options > to generate 64-bit test libraries; I seem to remember a similar issue > with ppc64. > > In the shell, > > shell> file /path/to/libtest.so > > or > > shell> lipo /path/to/libtest.so -info > > might help to determine the architecture of the library. How right you are... ~/lisp/Lisp_Sources/site/cffi/tests $ file libtest.so libtest.so: Mach-O bundle i386 ~/lisp/Lisp_Sources/site/cffi/tests $ file libtest2.so libtest2.so: Mach-O bundle i386 ~/lisp/Lisp_Sources/site/cffi/tests $ lipo libtest.so -info Non-fat file: libtest.so is architecture: i386 ~/lisp/Lisp_Sources/site/cffi/tests $ lipo libtest2.so -info Non-fat file: libtest2.so is architecture: i386 I added a -m64 flag to the makefile for the test libs, now they are ~/lisp/Lisp_Sources/site/cffi/tests $ lipo libtest2.so -info Non-fat file: libtest2.so is architecture: x86_64 ~/lisp/Lisp_Sources/site/cffi/tests $ lipo libtest.so -info Non-fat file: libtest.so is architecture: x86_64 ~/lisp/Lisp_Sources/site/cffi/tests $ file libtest2.so libtest2.so: Mach-O 64-bit bundle x86_64 CFFI-tests now infini-loops with cpu usage at 100% while compiling the file calbacks.lisp (that is a problem for another night...), however if I interrupt and do the following... CL-USER> (asdf:oos 'asdf:load-op 'cffi-tests) ; loading system definition from /Users/hirvine/lisp/Lisp_Sources/ systems/cffi-tests.asd into #<Package "ASDF0"> ; registering #<SYSTEM CFFI-TESTS #x30004114729D> as CFFI-TESTS ; loading system definition from /Users/hirvine/lisp/Lisp_Sources/ systems/rt.asd into #<Package "ASDF0"> ; registering #<SYSTEM :RT #x30004119034D> as RT ; loading system definition from /Users/hirvine/lisp/Lisp_Sources/ systems/cffi.asd into #<Package "ASDF0"> ; registering #<SYSTEM CFFI #x3000411AB2CD> as CFFI ; $ cd /Users/hirvine/lisp/Lisp_Sources/site/cffi/tests/; make make: Nothing to be done for `shlibs'. Invoking restart: Skip compiling #P"/Users/hirvine/lisp/Lisp_Sources/ site/cffi/tests/callbacks.lisp" Invoking restart: Continue, treating #<COMPILE-OP NIL #x300040FFF4FD> on #<CL-SOURCE-FILE "callbacks" #x3000410048FD> as having been successful. Invoking restart: Skip loading #P"/Users/hirvine/lisp/Lisp_Sources/ compiled/.fasls/openmcl-unix-x86-64-1.1/Users/hirvine/lisp/ Lisp_Sources/site/cffi/tests/callbacks.dx64fsl" NIL CL-USER> (asdf:oos 'asdf:test-op 'cffi-tests) How many times shall we run the tests (uncompiled)? [1]: Doing 182 pending tests of 182 tests total. --- snip --- No tests failed. ;;; Finished running tests (uncompiled) 1 times. How many times shall we run the tests (compiled)? [1]: Doing 182 pending tests of 182 tests total. --- snip --- No tests failed. ;;; Finished running tests (compiled) 1 times. NIL Thanks Gary!

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