C-Wrappering & typedef

Question

Hi everyone,
I am currently working on prototyping a C-wrappered solution on Windows
NT 3.51 using Forte 3.0.f.2 and I am having trouble wrapping a 'typedef
struct' structure. I have read the Integrating with External Systems
manual and I thought that I did everything right until I went to compile
using fcompile.
When I compiled the first time, I got the following errors:
WRPRTEST.cc
WRPRTEST.cc(273) : error C2733: second C linkage of overloaded function
'TestFunction1' not allowed
This confused me because I did not think that I was trying to overload
the function. On a suggestion from the manuals, I compiled with the
flag -cflags '-DFORTE_NO_FORWARDS' and received the following error
output:
WRPRTEST.cc
WRPRTEST.cc(296) : error C2664: 'TestFunction1' : cannot convert
parameter 1 from 'struct CONNECT_OPTIONS_STRUCT *' to 'CONNECT_OPTIONS
*' (new behavior; please see help)
Error during compilation, aborting.
So it would seem that I have not defined the wrapper properly. The C
structure that I am trying to wrapper is:
typedef struct
char * destination;
void * connopt;
char * client;
int trace;
CONNECT_OPTIONS;
The C function that uses this structure is:
CONN_HANDLE TestFunction1 (CONNECT_OPTIONS * options); //CONN_HANDLE is
an unsigned int
The only way that I found in Forte to wrapper this typedef struct was to
do the following:
struct CONNECT_OPTIONS_STRUCT
destination : Pointer to Char;
connopt : Pointer;
client : Pointer to Char;
trace : Int;
end;
typedef CONNECT_OPTIONS : CONNECT_OPTIONS_STRUCT;
The function is wrappered like this:
class Test_Methods inherits from Framework.Object
has public method TestFunction1(input options : Pointer to
CONNECT_OPTIONS) : CONN_HANDLE;
has property
distributed=(allow=off, override=on);
end class;
Does anyone see anything that I am obviously doing wrong? Is there a
special/appropriate way to handle typdef struct in TOOL? Any
suggestions would be much appreciated.
Thanks for your time,
-howard meisner
Howard Y. Meisner [email protected]
Consulting Services (617) 923 - 6664 (v)
OneWave, Inc. (617) 923 - 6565 (f)
-------------------------------------------------------------

Answer 1

Howard,
Are you trying to compile your C code with the C++ compiler? That might
lead to the name hashing error you seemed to get, where it made
CONNECT_OPTIONS into CONNECT_OPTIONS_STRUCT.
The file which (a) contains your C struct and C API definitions needs to be
compiled with C and C only. The C++ code generated by Forte which maps the
forte version of your struct needs to be compiled with C++.
-John
John L. Jamison
Vice President and Chief Technology Officer
Sage IT Partners, Inc.
415 392 7243 x 306
[email protected]
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