* Lisp_Object to char* @ 2003-12-13 19:25 mr mike 2003-12-14 5:54 ` Eli Zaretskii 2003-12-18 22:59 ` Stefan Monnier 0 siblings, 2 replies; 3+ messages in thread From: mr mike @ 2003-12-13 19:25 UTC (permalink / raw) Hello emacs hackers, In the C code, how do you convert a Lisp_Object to a char* value? I'm asking because I'm playing around with making a gtk widget from the gtk emacs port, and I am going to pass a argument to make-frame like this (make-frame '((foo . "abc"))) and I need to know what the value that goes with foo. I can get the argument with x_get_arg(). I just need the value. mike ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Lisp_Object to char* 2003-12-13 19:25 Lisp_Object to char* mr mike @ 2003-12-14 5:54 ` Eli Zaretskii 2003-12-18 22:59 ` Stefan Monnier 1 sibling, 0 replies; 3+ messages in thread From: Eli Zaretskii @ 2003-12-14 5:54 UTC (permalink / raw) Cc: emacs-devel > From: mr mike <mwingert7149@wowway.com> > Date: Sat, 13 Dec 2003 14:25:48 -0500 > > In the C code, how do you convert a Lisp_Object to a char* value? > > I'm asking because I'm playing around with making a gtk widget > from the gtk emacs port, and I am going to pass a argument > to make-frame like this > > (make-frame '((foo . "abc"))) > > and I need to know what the value that goes with foo. > > I can get the argument with x_get_arg(). I just need the value. Is the XCDR macro what you want? ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Lisp_Object to char* 2003-12-13 19:25 Lisp_Object to char* mr mike 2003-12-14 5:54 ` Eli Zaretskii @ 2003-12-18 22:59 ` Stefan Monnier 1 sibling, 0 replies; 3+ messages in thread From: Stefan Monnier @ 2003-12-18 22:59 UTC (permalink / raw) Cc: emacs-devel > In the C code, how do you convert a Lisp_Object to a char* value? You can use STRINGP to check that the Lisp_Object is indeed a string and then XSTRING will get you a Lisp_String* pointer from which you can get the size with SSIZE and the char* content with SDATA. Stefan ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2003-12-18 22:59 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2003-12-13 19:25 Lisp_Object to char* mr mike 2003-12-14 5:54 ` Eli Zaretskii 2003-12-18 22:59 ` Stefan Monnier
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