jeusdi
17th April 2009 13:36 UTC

System plugin (call C static library function)
Hello forum,

I've developed a static C library: NSISWS.a.

NSISWS.h->

extern unsigned char* activateLicence(char* licence_type_code, char* customer_code);

NSISWS.c->

unsigned char* activateLicence(char* licence_type_code, char* customer_code) 
{
          unsigned char* result;
          result = "fdfdfdfdfdfdfdf...";
          return result;
}

I've copied NSISWS.a file on the same directory of my NSIS script. In order to call this function I use System plugin as follow:

        System::Call "NSISWS::activateLicence("bl", "bl") c .r0
        DetailPrint "Licence: $0"

The result is:
http://i16.photobucket.com/albums/b45/jeusdi/NSIS1.png

Can you help me please?
What Am I doing wrong?
I will appreciate your help a lot.

Anders
17th April 2009 13:57 UTC

") c .r0" and c would be??? you can't just make up types, you must read the system plugin readme

try System::Call "NSISWS::activateLicence(t "bl", t "bl")t.r0

not sure if returning a string like that will work, normally your function would look like:
void MyFunc(char*a,char*b,char*output)
{
lstrcpy(output,"hello");//must be < 1024 chars
}
and System::Call "dll::MyFunc(t "bl", t "bl",t.r0)

also remember that the function needs to be stdcall unless you pass ?c

jeusdi
20th April 2009 10:54 UTC

Hello Anders. Thanks for your response. I've modified function signature as:

unsigned int activateLicence(const char* licence_type_code, const char* customer_code, char* licence_filename);

And I call it as:

        System::Call "NSISWS.a::activateLicence(t "bla bla"., t "ble ble"., t.r1) t .r0
        DetailPrint "Licence: $0"

I think that the method is not called, because this function creates a file and it is not created.

Can you help me, plase?
Thanks in advance.

Anders
20th April 2009 11:06 UTC

the function returns int, so why are the t??

also remember that the function needs to be stdcall unless you pass ?c

Joel
21st April 2009 01:59 UTC

Maybe you should try to make it as a plugin and use the function "setuservariable" to write things to the nsis stack.

jeusdi
21st April 2009 10:11 UTC

Does exist any tutorial in order to create NSIS Plugins?
Thanks for all.

Joel
23rd April 2009 00:54 UTC

Yes, get the source code and look for ExDLL