Dear Rob,

Thank you so much for your hint with Inline:C. I will try this at the next opportunity

I don't know why, but I solved my problem with the following:

_new(class,count, val_arr)
    char *class
    int count
    AV *val_arr
PREINIT:
    EdjeMessageStringSet *message;
    int index;
    SV *tmp;
    char *string;
    STRLEN len;
CODE:
    Newx(message,1,EdjeMessageStringSet);
    Renewc(message,count+2, char*,EdjeMessageStringSet);
    if (message == NULL) 
        croak("Failed to allocate memory in _new function\n");
    message->count = count+1;
    for (index = 0; index <= count; index++) {
        tmp = *av_fetch(val_arr,index,0);
        string = SvPVutf8(tmp,len);
        message->str[index] = savepvn(string,len);
    }
    RETVAL = message;
OUTPUT:
    RETVAL

[download]

I have to allocate memory for the Edje_Message_String_Set struct and for the array of strings, because it is only at runtime visible, how many strings are in the array. In C this goes through malloc(sizeof(Edje_Message_String_Set) + count * sizeof(char*)). In Perl this works with the Renewc function. The only thing I don't understand is, why I had to reallocate count+1 items of char*. It should be count+1 :-S (because count starts at 1, and the index of the given Perl array starts at 0). (in a C example there is even malloced count-1 * sizeof(char*)...). But whatever, I am happy that it works now...

In reply to Re^2: Perl XS binding to a struct with an array of chars* by MaxPerl
in thread Perl XS binding to a struct with an array of chars* by MaxPerl

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