// Helper method to create C string copy

NSString* MakeNSString (const char* string) {

    if (string) {

        return [NSString stringWithUTF8String: string];

    } else {

        return [NSString stringWithUTF8String: ""];

    }

}

char* MakeCString(NSString *str) {

    const char* string = [str UTF8String];

    if (string == NULL) {

        return NULL;

    }

    char* res = (char*)malloc(strlen(string) + );

    strcpy(res, string);

    return res;

}