Ok Greg, What if we will try to define the format and start with the record separator - may be use the same as SDF? Index file can be created during the writing.
Regards, Evgueni 2009/5/1 Greg Landrum <greg.land...@gmail.com> > On Fri, May 1, 2009 at 8:06 AM, Evgueni Kolossov <ekolos...@gmail.com> > wrote: > > Thank you very much Greg, > > > > Couple of more things to clarify: > > - in documentation you have mentioned pickle files. Can you please > > give an example read/write for this kind of files; > > The documentation is primarily focused on python. Python has it's own > method for serializing (pickling) objects. From C++ I never really did > too much with writing to/reading from binary files. I guess one could > just write the binary data directly to the stream and read it back the > same way, but this doesn't answer your next question: > > > - in SDF the records separated by quite definite sequence which allow > > us to create an index file and have direct access to particular record > > number. Is it possible with pickle files? > > If you create your own convention for how you write the files, sure. > Otherwise you have to just build files and then write out the result > of an fget after each read is finished. On reading you can seek to the > relevant position and then start reading. > > It probably would be useful to have a standardized binary format for > reading from C++ (or python), but I have never had the pressing need; > so it hasn't happened. > > -greg > -- Dr. Evgueni Kolossov (PhD) ekolos...@gmail.com Tel. +44(0)1628 627168 Mob. +44(0)7812070446
