[postgis-devel] what's the main job of lwgeom_api.c

[xie jiong]

I would prefer seperatre library and database in different directory.

Mark said: lwgeom_api.c contains the remainder of the LWGEOM functions which don't fit into the
individual geometry categories such as lwline.c or lwcurve.c.

but how can we distinguish lwgeom.c and lwgeom_api.c? if lwgeom.c represents all the geom types,
so some functions like lwgeom_hasZ put into lwgeom.c would be more proper.(just like base class in C++)

any idea?

Jiong



----- Original Message ----- 
From: "Paul Ramsey" <pramsey at cleverelephant.ca>
To: "PostGIS Development Discussion" <postgis-devel at postgis.refractions.net>
Sent: Monday, June 16, 2008 6:40 PM
Subject: Re: [postgis-devel] what's the main job of lwgeom_api.c


> If we are going to retain this duality of library / database bindings,
> would it be nicer to have them separated into different directories?
> Or maybe a more strict file naming convention?
> 
> P
> 
> On Mon, Jun 16, 2008 at 12:19 PM, Mark Cave-Ayland
> <mark.cave-ayland at siriusit.co.uk> wrote:
>> xie jiong wrote:
>>> HI everyone:
>>>    My question is what's the main job of lwgeom_api.c? I couldn't
>>> understand what does the 'api' stand for? Are they
>>> the funtions mainly for processing the serialized_form of Geometry?
>>> (because many funs in it do jobs with serialized_form geometry as input
>> parameter.)
>>>
>>> Waiting for your reply, thanks.
>>>
>>> Jiong
>>
>>
>> Hi Jiong,
>>
>> API is simply just "Application Programming Interface". The aim of
>> liblwgeom was to allow reuse of the basic geometric types from other
>> places. AIUI the file contains the remainder of the LWGEOM functions (i.e.
>> functions that don't require PostgreSQL) which don't fit into the
>> individual geometry categories such as lwline.c or lwcurve.c. Note that we
>> do also have a separate file for handling point array routines which are
>> located in ptarray.c.
>>
>>
>> HTH,
>>
>> Mark.
>>
>> --
>> Mark Cave-Ayland
>> Sirius Corporation - The Open Source Experts
>> http://www.siriusit.co.uk
>> T: +44 870 608 0063
>>
>>
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