[geos-devel] GEOS C API - WKB and WKT deprecated functions

Benjamin Chartier benjamin.chartier at cegetel.net
Wed Oct 31 02:44:59 EDT 2007


Thank you Robert and Charlie for your responses.
This is much clearer for me now.

Benjamin


Charlie Savage a écrit :
>> On 29/10/2007, *Benjamin Chartier* <benjamin.chartier at cegetel.net 
>> <mailto:benjamin.chartier at cegetel.net>> wrote:
>>
>>     Justin and Charlie, many thanks for your answers.
>>     By the way, is there a ggod reason why the Reader and Writer API 
>> should
>>     be used in stead of the deprecated functions? Is there any 
>> performance
>>     issue?
>>
>>
>> You can do things like write EWKT/EWKB which aren't possible using 
>> the old C API.
>
> That's the most important thing.  But also:
>
> * the old api used global static variables for storing the byte order 
> and output dimensions.  So on the off hand chance you wanted to write 
> out 2d and 3d outputs in 2 different threads you couldn't do it.
>
> * the old api forced a creation of a new reader/writer each time you 
> called it.  Probably not a big deal, but the new api let's you control 
> that so you can reuse the same reader/writer.
>
> Hope that helps,
>
> Charlie



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