question about code example from https://httpd.apache.org/docs/2.4/developer/modguide.html Boî

[Pierre Forstmann]

Hello,

I don't understand how following loop can work


        for (i = 0; &formData[i]; i++) {

    }

from:

static int example_handler(request_rec *r){
    /*~~~~~~~~~~~~~~~~~~~~~~*/
    keyValuePair *formData;
    /*~~~~~~~~~~~~~~~~~~~~~~*/

    formData = readPost(r);
    if (formData) {
        int i;
        for (i = 0; &formData[i]; i++) {
            if (formData[i].key && formData[i].value) {
                ap_rprintf(r, "%s = %s\n", formData[i].key, formData[i].value);
            } else if (formData[i].key) {
                ap_rprintf(r, "%s\n", formData[i].key);
            } else if (formData[i].value) {
                ap_rprintf(r, "= %s\n", formData[i].value);
            } else {
                break;
            }
        }
    }
    return OK;}

I tried to use this code in https://github.com/pierreforstmann/mod_plpgsql
but I could not
so I have modified it by just using the array entry number.

Can somebody explain to me why the array entry address is used ?

I tried to simplify this with following code that also does not work:

https://github.com/pierreforstmann/mcc/blob/ebabf5d2f784542d90a71825abb12506f3e64784/tal.c

Thanks.