72083 - Need sample of XPCOM-in-C

Status: RESOLVED WONTFIX

(Core :: XPCOM, defect)

Description

[Mike Shaver (:shaver emeritus)]

<J-random-person-in-need-of-component-system> but XPCOM is only for C++

It doesn't have to be true.  I'll make it untrue.

Comment 1

[Mike Shaver (:shaver emeritus)]

Oh yeah, baby.

Compile this little mama with:

gcc -o c_sample.o
gcc -shared -Wl,-h -Wllibcsample.so -o libcsample.so

Then copy her into your components directory.  I play a little fast-and-loose
with QI and refcounting for some of the objects (module, factory), but it all
works well enough to let XPConnect create and manipulate it through nsISample.

Comment 2

[Mike Shaver (:shaver emeritus)]

Er, make that first line: gcc -c c_sample.c

(Obviously.)

Comment 3

[Mike Shaver (:shaver emeritus)]

Attachment: c_sample.c, mark 1

Comment 4

[Mike Shaver (:shaver emeritus)]

With an xpidl mode for C, and some helpful macros, that might actually not be
completely unpleasant to work with.  Certainly not much worse than CORBA-in-C,
and people actually do that.

The code as posted will work with gcc-2.96 on Linux.  If you want to use another
compiler (gcc-3, say), you'll need to replace the crap1/crap2 placeholders in
nsISupports_vtbl.  If you're on the Mac, you'll need to do something about
strdup, whose existance I arrogantly assume.

I don't do the correct thing with the allocator, either.  Maybe later.

Comment 5

[Chris Waterson]

Cool. Now you can start working on nsAReadableString-in-C. ;-)

Comment 6

[Mike Shaver (:shaver emeritus)]

Not a 1.0 bug.

Comment 7

[Mike Shaver (:shaver emeritus)]

Need is so strong a word.

Comment 8

[Benjamin Smedberg]

Just say no.