# Re: \[PATCH 09/14\] d\_path: introduce struct prepend\_buffer

- From: Enrico Weigelt, metux IT consult \<hidden\>
- Date: 2021-06-24 09:31:38 
- List: linux-doc
- Page: https://ratatoskr.run/linux-doc/2021/06/208672
- Thread: https://ratatoskr.run/linux-doc/2021/05/205534/t.md

```text
Hi folks,

<snip>

>>         We've a lot of places where we have pairs of form (pointer to end
>> of buffer, amount of space left in front of that).  These sit in pairs of
>> variables located next to each other and usually passed by reference.
>> Turn those into instances of new type (struct prepend_buffer) and pass
>> reference to the pair instead of pairs of references to its fields.
>>
>> Declared and initialized by DECLARE_BUFFER(name, buf, buflen).
>>
>> extract_string(prepend_buffer) returns the buffer contents if
>> no overflow has happened, ERR_PTR(ENAMETOOLONG) otherwise.
>> All places where we used to have that boilerplate converted to use
>> of that helper.

this smells like a generic enough thing to go into lib, doesn't it ?


--mtx

-- 
---
Hinweis: unverschlüsselte E-Mails können leicht abgehört und manipuliert
werden ! Für eine vertrauliche Kommunikation senden Sie bitte ihren
GPG/PGP-Schlüssel zu.
---
Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@metux.net -- +49-151-27565287
```