[getdns-api] string from dict bindata

Tom Pusateri pusateri at bangj.com
Mon May 2 03:39:27 UTC 2016

> On May 1, 2016, at 8:40 PM, Melinda Shore <melinda.shore at nomountain.net> wrote:
> On 5/1/16 12:14 PM, Tom Pusateri wrote:
>> Are we supposed to peek inside of bindata and assume the bytes and length are string data?
> Yes, unfortunately you need to know what type of data
> are being returned in each dictionary element, but if you
> do it's extremely reliable.  bindata->size holds the
> string length.  I've found that bindata strings do not
> always have a terminal \0, so in the Python bindings I'm
> doing string conversions using PyString_FromStringAndSize()
> rather than just PyString_FromString().
> Melinda

Ok, good to confirm.

I am using a special printf construct to avoid the need for ‘\0' terminated strings:

printf("getdns version: %.*s implementation: %.*s\n",
       (int)version_bindata->size, version_bindata->data,
       (int)impl_bindata->size, impl_bindata->data);

This seems a little dirty to be accessing the data/size which should be opaque.

It’s not a big deal but I guess I was hoping for something like:

char *
getdns_characters_from_bindata(getdns_bindata *bindata, int *lenp)
    if (lenp) {
	*lenp = (int)bindata->size;
    return bindata->data;


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