Use the FFI of Chibi-scheme to call C

HypothesisC LanguageThe two written functions are:

 
Void hello_user (const char * Name) {printf ("Hello, % S. \ n", name); return;} void goodbye () {printf ("goodbye! \ N "); return ;}
 

If you want to call a function written by C in Chibi-scheme

Step 1: Create the stub File

You can create a test. Stub file with the following content:

 
(Define-CVoidHello-user (String))
(Define-CVoid(So-LongGoodbye )())
 

 
By default, the hello-user is converted to the hello_user in C language, and the short row is converted to an underscore. Or provide an alias. The Goodbye of C is named as so-long in scheme.
 

 
Step 2: Process stub files
 

 
Chibi-scheme provides a tool Chibi-FFI.
 

 
$ Chibi-scheme.../tools/genstubs. SCM Test. Stub
 

 
This will generate a test. c
 

 
Step 3: compile it into a dynamic link library
 

$ Gcc-FPIC-shared-I.../include/-l...-O hello. So hello. C test. C-lchibi-Scheme
 

 
Step 4: Load
 

 
Load the hello. So file in scheme to call the above function.
 

 
$ Chibi-Scheme
> (Load"./Hello. So")
> (Hello-user"Taylor")
Hello, Taylor.
> (So-Long)
Goodbye!