Wireshark · Wireshark-dev: Re: [Wireshark-dev] proto_add_tree_item versus proto_add_tree_string

[Guy Harris <guy@xxxxxxxxxxxx>]

On Mar 12, 2007, at 5:46 PM, Neely Grady-W30566 wrote:

> I built a function called tvb_get_bits8 based on some work someone  
> else has done, and it handles incrementing the tvb offset and  
> grabbing the bits I want, even if the straddle byte boundaries.   
> However, this only works if I retrieve the value.  Seems like their  
> ought to be a way to do this without retrieving the value and  
> printing it via a proto_add_text or _string.

There is - retrieving the value and adding it to the tree with  
proto_tree_add_uint().

That way:

	1) it's a registered field;

	2) it's an integral field, not a string;

	3) you don't have to worry about bit masks in the fields.

The fields, in this case, would *not* have bit masks, and would have a  
size that's the size of the field rounded up to the lowest of (8, 16,  
24, 32, 64).