[jira] Updated: (XERCESC-1428) new iconv-transcoder algorithm

["Axel Weiss (JIRA)" <xe...@xml.apache.org>]

     [ http://issues.apache.org/jira/browse/XERCESC-1428?page=all ]

Axel Weiss updated XERCESC-1428:
--------------------------------

    Attachment: transcoder-179120.diff

> new iconv-transcoder algorithm
> ------------------------------
>
>          Key: XERCESC-1428
>          URL: http://issues.apache.org/jira/browse/XERCESC-1428
>      Project: Xerces-C++
>         Type: Improvement
>   Components: Utilities
>  Environment: linux
>     Reporter: Axel Weiss
>     Priority: Minor
>  Attachments: transcoder-179120.diff
>
> James Berry wrote:
> > What if you make this initial buffer a static buffer? And allocate  
> > the exact size needed at the end?
> > That keeps the memory cost constant, at the expense of a guaranteed  
> > extra string copy.
> >
> > For cases where you exceed the static buffer size, continue to do  
> > your size-doubling on overflow; for the cases where you exceed the  
> > static buffer size, you'll continue to use excess memory.
> >
> > I think this tradeoff would be worth it...
> Ok, it now starts with a local buffer on the stack and creates a copy with the exact size needed, if this buffer was not exceeded. Otherwise, an always doubling buffer enlargement is performed, resulting in returning an excess buffer for the result.
> The patch is against 3.0-unstable-179120.
>                  Axel

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