[CCC DEV] FFI

[Mathias Spiessens]

Hi all,

I have problems calling a function form the foreign function interface.

This is my FFI:

int _ffi_print(ECTX ectx, WORD args[])
{
     printf("INFO: ffi.print called.\n");

     char* str = (char*)args[0];
     int len = args[1];
     int pos = 0;
     char buffer[256];

     while(pos < len)
     {
         buffer[pos] = str[pos++];
     }
     buffer[len] = '\0';

     printf(buffer);

     return SFFI_OK;
}

SFFI_FUNCTION sffi_table[] = {_ffi_print};
const int sffi_table_length = sizeof(sffi_table) / sizeof(SFFI_FUNCTION);

This is a small test in occam:

-- Occam process to interface with the the print function from the 
foreign function interface (FFI).
#PRAGMA EXTERNAL "PROC C.tvmspecial.0.ffi.print (VAL []BYTE buffer) = 0"

INLINE PROC write.screen (VAL []BYTE buffer)
   C.tvmspecial.0.ffi.print (buffer)
:

PROC main ()
   SEQ
     write.screen("INFO: Test!")
:

I've followed the example of the nxt wrapper. In a paper about the FFI 
another naming convention was mentioned, without the "tvmspecial.0" yet 
in another paper a leading "__" is mentioned.
Anyway none of these naming conventions seem to work.
Am I overlooking something?

Best regards,

Mathias