[Liblas-devel] libLAS' Boost infection

[Mateusz Loskot]

On 14/07/10 18:09, Howard Butler wrote:
> On Jul 14, 2010, at 11:39 AM, Mateusz Loskot wrote:
>
>>> Boost also provides many other interesting possibilities, but for
>>> now, I will try to limit the requirements to header-only
>>> libraries.
>>
>> What's the state of the large files and streams issue?
>
> Mostly untouched at this point<http://trac.liblas.org/ticket/147>.
> This is only a problem when *seeking* to the end of the file to
> determine how many points are in it, and even then only in the case
> where we're updating an existing file's header, not writing into a
> new file.  This all only happens in the case where the file is
> greater than 4gb on Windows/OSX/Linux.
>
> I think the most reasonable option is to just believe what the header
> says in that case, and if the user updating a header on an existing
> file is not keeping track of the point count, it's their own fault.
> LAS 1.3 files can have waveform data after the point data, so this
> strategy of seeking to the end of the file and subtracting the header
> to determine the number of points isn't going to be valid anymore.
> We're going to need to believe the header's point count and size
> information to get the count.

I think this strategy will do best indeed.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net