Windows doesn't define F_OK and access() is in io.h, rather than stdio.h
These are fixed in FileUtils.cpp, so I copied the fix from there - might be better to move this to FileUtils header and include it here and in FileUtils.cpp?"
Introduced a new FindFileCallback to Registry to compliement the existing ReadFileCallback and WriteFileCallback.
Added support for assign Find, Read and WriteFileCallbacks to osdDB::Options to enable plugins/applications to override the callbacks just for that
read/write call and any nested file operations
Single features are implemented as bits asother enums in ReaderWriter class already does, so that combinations are possible and fast comparison operations are possible
By default all features are enabled.
I have added this virtual method to the dot plugin to get an idea how to use these features.
With this patch osgconv --formats shows an additional line 'features' for each plugin"
"Attached you'll find a proposal for using different
protocols. The idea behind the new code is:
1.) plugins/apps register protocols which they can handle. This is done
via osgDB::Registry::registerProtocol(aProtocolName). Plugins register
supported protocols as usual via ReaderWriter::supportsProtocol(..), the
Registry is updated accordingly.
2.) osgDB::containsServerAddress checks first for an appearance of "://"
in the filename and then checks the protocol against the set of
registered protocols via Registry::isProtocolRegistered(aProtocollName)
3.) the other getServer*-functions changed as well, there's even a
getServerProtocol-function
With these changes filenames/Urls get routed to loaded plugins even with
different protocols than 'http'."
