December 2008 - cffi-devel - mailman3.common-lisp.net

[cffi-devel] New patches: 30-Dec-2008
by Luis Oliveira 02 Jan '09

02 Jan '09

Tue Dec 30 01:45:38 UTC 2008 Luis Oliveira <loliveira(a)common-lisp.net> * manual: miscellaneous improvements - use a roman font for comments in the TeX outputs. - fix some typos and missing @lispcmt{}s. - insert page breaks before each CLHS-style documentation node. This should make it much clearer to read and browse, at the expense 23 more pages in total, a ~25% increase. M ./doc/cffi-manual.texinfo -17 +78 An updated tarball of CFFI's source can be downloaded here: http://common-lisp.net/project/cffi/tarballs/cffi-081230.tar.gz Darcsweb URL: http://common-lisp.net/cgi-bin/darcsweb/darcsweb.cgi?r=cffi-cffi;a=summary

5 6

[cffi-devel] defcstruct and array.
by mosi 31 Dec '08

31 Dec '08

Hi, I`m experimenting with defcstruct. I tried the following: (*defcstruct* point (nr :int) (name :char :count 32) (coordinates :float :count 3)) which also works like: ... (coordinate1 :float) (coordinate2 :float) (coordinate3 :float) I`m getting the values like this: (*with-foreign-object* .... (*with-foreign-slots* ... nr by foreign-slot-value name by foreign-string-to-lisp but how do I read the array of floats with N dimensions into lisp? Maybe I am missing something obvious here. Thanks a lot.

2 1

[cffi-devel] New patches: 28-Dec-2008
by Luis Oliveira 29 Dec '08

29 Dec '08

Sun Dec 28 21:37:58 UTC 2008 Stelian Ionescu <sionescu(a)common-lisp.net> * Fix %INVOKE on Clisp. M ./grovel/grovel.lisp -2 +5 Sun Dec 28 21:22:45 UTC 2008 Stelian Ionescu <sionescu(a)common-lisp.net> * Use ETYPECASE instead of COND in a few places. M ./grovel/grovel.lisp -21 +23 Sat Oct 11 13:00:10 UTC 2008 Hugo Duncan <hugo_duncan(a)yahoo.com> * Add the ability to specify a preprocessor symbol as the argument to :count in cstruct M ./grovel/grovel.lisp -1 +6 An updated tarball of CFFI's source can be downloaded here: http://common-lisp.net/project/cffi/tarballs/cffi-081228.tar.gz Darcsweb URL: http://common-lisp.net/cgi-bin/darcsweb/darcsweb.cgi?r=cffi-cffi;a=summary

1 0

[cffi-devel] Using preprocessor symbol as argument to :count in cstruct
by Hugo Duncan 28 Dec '08

28 Dec '08

Hi, Attatched is a simple (5-line) patch bundle that allows the use of a preprocessor symbol as the argument to the :count keyword in a cstruct. This allows grovelling of structs that contain arrays whose size is specified by a #defined value. Previously, non-numeric arguments were ignored. First time using darcs for anything other than retrieval, so I hope the attached is in a useable form. Hugo

2 1

[cffi-devel] New patches: 27-Dec-2008
by Luis Oliveira 28 Dec '08

28 Dec '08

Sat Dec 27 23:09:19 UTC 2008 Luis Oliveira <loliveira(a)common-lisp.net> * defcvar: don't ignore the documentation string. - use (setf documentation) to store the docstring. - add regression test. Bug report courtesy of James A. Crippen. M ./src/foreign-vars.lisp -1 +1 M ./tests/foreign-globals.lisp -1 +4 Sat Dec 27 23:05:30 UTC 2008 Luis Oliveira <loliveira(a)common-lisp.net> * manual: various improvements to the DEFCFUN node - Add new example using an argless function. - Document the docstring support and exemplify it. - Fix some typos. Bug reports courtesy of James A. Crippen. M ./doc/cffi-manual.texinfo -4 +18 An updated tarball of CFFI's source can be downloaded here: http://common-lisp.net/project/cffi/tarballs/cffi-081227.tar.gz Darcsweb URL: http://common-lisp.net/cgi-bin/darcsweb/darcsweb.cgi?r=cffi-cffi;a=summary

1 0

[cffi-devel] clisp+cffi on windows+cygwin+emacsNT+slime -- the latter two prevent a library from loading
by Mirko Vukovic 27 Dec '08

27 Dec '08

Hello, This is a follow up on a question I posted several months ago, when I was unable to link to the GNU Scientific Library from clisp (while others could). I did a bit more digging, and I narrowed down the problem, but I am still looking for a solution. I am running clisp built on cygwin on windows. I mainly run clisp through slime on top of emacs_nt (emacs built for windows). I can link to the library, cyggsl from clisp, meaning, I start an x-terminal, start clisp and execute: >(cffi:load-foreign-library "/bin/cyggsl-0.dll") But if I do that from slime, then the load fails: Unable to load foreign library (NIL). FFI:OPEN-FOREIGN-LIBRARY: Cannot open library "/bin/cyggsl-0.dll": "No such file or directory" [Condition of type LOAD-FOREIGN-LIBRARY-ERROR] The problem seems to lie with slime and emacs_nt. I had a similar problem already, because these two would not export the DISPLAY variable needed by some other applications. The problem is not universal, because I can load other libraries via slime: cyggslcblas-0.dll for example. I could not figure out what is it that the windows version of emacs+slime is causing cffi not no see the library. Anyone else has a clue? Thanks, (and happy holidays), Mirko

2 2

[cffi-devel] cffi:defcstruct, cffi:foreign-string-to-lisp question
by mosi 17 Dec '08

17 Dec '08

Hi, I don`t know if this is the right group to ask, but I would appreciate some help with the following. The aim is to read a binary file from lisp. The file contains a set of records, every record consists of the following data: (cffi:defcstruct ppp (nr :unsigned-int) (name :char :count 32) ;; this is the problematic line 1 (alias :char :count 12) ;; this is the problematic line 2 (m :double) (t :double) (p :double) (v :double)) Now the problematic line 1 should read 32 characters from an ascii-encoded file. For that, I use the (defun test .....) (see below). The test converts the cstruct with-foreign-slots through (cffi:foreign-string-to-lisp name). The output of (test) is: (1 "ABC ABC ÙÎ÷Só<@fffffŽ`@" "ABC ÙÎ÷Só<@fffffŽ`@" 28.9d0 132.4d0 3774.0d0 0.0d0) where: (length (second *)) >> 60 (length (third **)) >> 28 whereas I would expect the output to be: (1 "ABC " "ABC " 28.9d0 132.4d0 3774.0d0 0.0d0) with length second = 32 and length third = 12. Am I missing something? I tried: (cffi:foreign-string-to-lisp name 32) (cffi:foreign-string-to-lisp name 12) this works, the correct output is presented. But how can I get the length of the char in the cstruct PPP? Thank you very much, best regards, mosi ;;---- TEST.lisp ------ (in-package :cl-user) (eval-when (:compile-toplevel :load-toplevel) (require :cffi)) (defpackage :test (:use :cl)) (in-package :test) (cffi:defcfun "fopen" :pointer (path :string) (mode :string)) (cffi:defcfun "fread" :unsigned-long (ptr :pointer) (size :unsigned-long) (nmemb :unsigned-long) (stream :pointer)) (cffi:defcfun "fclose" :int (fp :pointer)) (cffi:defcstruct ppp (nr :unsigned-int) (name :char :count 32) (alias :char :count 12) (mw :double) (tc :double) (pc :double) (vc :double)) (defparameter *file-path* "C://the-file.bin") ;; (defun test ()) (let (file) (unwind-protect (progn (setf file (fopen *file-path* "rb")) (cffi:with-foreign-object (struct 'ppp) (fread struct (cffi:foreign-type-size 'ppp) 1 file) (cffi:with-foreign-slots ((nr name alias m t p v) struct ppp) (list nr (cffi:foreign-string-to-lisp name) (cffi:foreign-string-to-lisp alias) mw tc pc vc)))) (when file (fclose file)))) ;; run this by (test)

2 1