🚀 go-pugleaf

"nicolasr" <nicolasrNOSPAMATSIGNgmx.net> wrote in message
news:407356a8$1@newsgroups.borland.com...

> However I don't understand why using std::ifstream
> inside the DLL always gets me an AV
> (read of address 00000000). Any idea?

It is not related to the std::ifstream itself, but more likely to the
std::string that you passed to it.  Once you change to char* instead, you
shouldn't have the problem anymore.  For example:

    bool FileType1Test(const char *fileName)
    {
        ifstream in(fileName);

        char c;
        in >> c;

        return ( c == 'A' );
    }

    extern "C" __declspec(dllexport) char* __stdcall Validate(const char*
funcName, const char* args)
    {
        if( std::string(funcName) == "FileType1Test" )
            return FileType1Test(args) ? "TRUE" : "FALSE";
        else
            return "FALSE";
    }

>       typedef void (*PTestFunc)(const char* fileName);

You left out the __stdcall convention, thus you are going to corrupt the
stack.  It needs to be this instead:

    typedef void (__stdcall *PTestFunc)(const char* fileName);



Gambit