cffi-devel September 2008

cffi-devel@common-lisp.net

10 participants
10 discussions

[cffi-devel] asdf-install
by Xristos Kalkanis 28 Nov '08

28 Nov '08

Hello, Is there a reason that asdf-install is "not as recommendable" ? I think cl-build maps well to a lot of projects but so does asdf-install for a lot of others (particularly those with stable releases like cffi). A lot of people would like to avoid having to get everything from darcs/git/svn/cvs including me. The latest cffi release does not install cleanly with asdf-install as Stefil is not on cliki and can not be installed. Can this get fixed ? Regards, Chris

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[cffi-devel] RE: Men's Health id 712128
by Doctor Clara 29 Sep '08

29 Sep '08

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[cffi-devel] New patches: 26-Sep-2008
by loliveira＠common-lisp.net 27 Sep '08

27 Sep '08

Fri Sep 26 16:51:12 EDT 2008 Luis Oliveira <loliveira(a)common-lisp.net> * gendocs.sh fix: pass --no-userinit to sbcl M ./doc/colorize-lisp-examples.lisp -12 +11 M ./doc/gendocs.sh -2 +4 Fri Sep 26 15:50:08 EDT 2008 Luis Oliveira <loliveira(a)common-lisp.net> * Update SCL port. Patch courtesy of Douglas Crosher. M ./grovel/grovel.lisp -1 +1 M ./src/cffi-scl.lisp -1 +1 M ./tests/defcfun.lisp -1 +1 An updated tarball of CFFI's source can be downloaded here: http://common-lisp.net/project/cffi/tarballs/cffi-080926.tar.gz Darcsweb URL: http://common-lisp.net/cgi-bin/darcsweb/darcsweb.cgi?r=cffi-cffi;a=summary

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[cffi-devel] Documentation bug (DEFINE-PARSE-METHOD)
by Chaitanya Gupta 26 Sep '08

26 Sep '08

Hi, The CFFI user manual seems to be incorrect for DEFINE-PARSE-METHOD -- http://common-lisp.net/project/cffi/manual/cffi-manual.html#define_002dpars… The examples are the same as for DEFINE-FOREIGN-TYPE (which is the previous symbol described in the manual), and the description is missing. Also, the descriptions given for Arguments and Values are either incorrect, or they are not very clear.. Chaitanya

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[cffi-devel] A question about adding gcc flags in groveling.
by elliott 25 Sep '08

25 Sep '08

Hi, I need to add an additional flag to a file being groveled for iolib (net.sockets/grovel.c uses struct ucred, which needs "-D_GNU_SOURCE" in my case). I was wondering if there is a standard way to add flags, like binding cffi-grovel::*cc-flags* to a different value? Elliott

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[cffi-devel] New patches: 12-Sep-2008
by loliveira＠common-lisp.net 13 Sep '08

13 Sep '08

Fri Sep 12 09:35:00 EDT 2008 Luis Oliveira <loliveira(a)common-lisp.net> tagged 0.10.2 Fri Sep 12 09:34:56 EDT 2008 Luis Oliveira <loliveira(a)common-lisp.net> * update cffi.asd for version 0.10.2 M ./cffi.asd -1 +1 Fri Sep 12 09:34:24 EDT 2008 Luis Oliveira <loliveira(a)common-lisp.net> * TODO cleanup M ./TODO -2 Fri Sep 12 09:33:50 EDT 2008 Luis Oliveira <loliveira(a)common-lisp.net> * Fix handling of the T clause in DEFINE-FOREIGN-LIBRARY - Added regression test: LIBRARY.T-CLAUSE. Bug report and initial patch courtesy of Kalyanov Dmitry. M ./src/libraries.lisp -1 +4 M ./tests/misc.lisp +13 An updated tarball of CFFI's source can be downloaded here: http://common-lisp.net/project/cffi/tarballs/cffi-080912.tar.gz Darcsweb URL: http://common-lisp.net/cgi-bin/darcsweb/darcsweb.cgi?r=cffi-cffi;a=summary

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[cffi-devel] Library specs with T are ignored
by Kalyanov Dmitry 12 Sep '08

12 Sep '08

Hello, cffi-devel! I have found a case when cffi behaves not as documented. The documentation in page for define-foreign-library says about load-clauses list that "Finally, if feature is t, this load-clause is picked unconditionally." But the load-clause with feature set to T is ignored, because function %foreign-library-spec uses alexandria:featurep, which does consider T to be feature. This patch should fix this: to return the load-clause that has feature set to T. Test case: (define-foreign-library libgraphan-wrap (t (:default "libgraphan-wrap"))) (equal (%foreign-library-spec (get-foreign-library 'libgraphan-wrap)) (t (:default "libgraphan-wrap"))) => T

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[cffi-devel] foreign strings
by Andy Chambers 11 Sep '08

11 Sep '08

Hi, I'm still plugging away on sqlite I've got a problem creating a binding for the following function int sqlite3_bind_text(sqlite3_stmt*, int, const char*, int n, void(*)(void*)); I tried the following.... (defcfun ("sqlite3_bind_text" %sqlite-bind-text) :int (stmt :pointer) (index :int) (value :string) (len :int) ;; not really an int but cffi takes care of this for us (destructor :int)) Everything is pretty straightforward apart from the last two parameters. Length is supposed to be the length of the value being passed in (or -1 if the value is null terminated). The destructor is supposed to be a function that frees the memory required by `value' after sqlite is finished with it. For destructor, you can use the special value 0 if the memory is in "unmanaged" space. So I have a few questions... 1. If you specify the type as :string, does cffi pass it through as a null terminated string? 2. Does cffi take care of freeing a string once the C library is finished with it or should I define a callback to use for the destructor. 3. With my current code, I'm not getting any memory errors but I am getting weird values in the database. For example.... With this binding, I don't get any memory errors but I do get nonsense values going into the database. Here's an example.... sqlite> select * from clinical_data; Âˆ|ÑÃ¸Â·ÑÃ¸Â·IBUTE|Âˆ|ÂÂ˜Â'Ã¸|Âˆ|ÂÂ˜Â'Ã¸|ÑÃ¸Â·ÑÃ¸Â·IBUTE|| The values I'm passing in to get this are... 001, StudyEventOID, 1, FormOID, 1, PARTIAL, ALL ATTRIBUTE, ID.PD, 1959-12 Any ideas what's going on here? Cheers, Andy

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[cffi-devel] Library specs with T are ignored
by Kalyanov Dmitry 10 Sep '08

10 Sep '08

Hello, cffi-devel! Sorry, last message was messed by gpg. I have found a case when cffi behaves not as documented. The documentation in page for define-foreign-library says about load-clauses list that "Finally, if feature is t, this load-clause is picked unconditionally." But the load-clause with feature set to T is ignored, because function %foreign-library-spec uses alexandria:featurep, which does consider T to be feature. This patch should fix this: to return the load-clause that has feature set to T. Test case: (define-foreign-library libgraphan-wrap (t (:default "libgraphan-wrap"))) (equal (%foreign-library-spec (get-foreign-library 'libgraphan-wrap)) (t (:default "libgraphan-wrap"))) => T

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[cffi-devel] Double pointers
by Andy Chambers 01 Sep '08

01 Sep '08

Hi, Please excuse the poor use of terminology in the following message. I'm stabbing around in the dark when it comes to C. I'll need to get a textbook someday and learn it properly. How do you pass a "double pointer" to a C function. For example, here's the signature for sqlite's open int sqlite3_open( const char *filename, /* Database filename (UTF-8) */ sqlite3 **ppDb /* OUT: SQLite db handle */ ); I'd like to define a cffi function that lets me call this and keep a handle on the ppDb object that gets created as a result. I've tried various combinations of (foreign-alloc ..) and (null-pointer) but always got a memory exception when trying to use the handle in another function. The sqlite stuff has lots of these functions that modify input parameters and return error codes rather than returning some opaque object like the CFFI example does. Cheers, Andy

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cffi-devel September 2008