Date: Fri, 4 Dec 1998 11:51:06 +0000 From: Alexander Zvyagin <ZVYAGIN@mx.ihep.su> X-Sender: ZVYAGIN@polar.ihep.su To: Canguo Li <licg@hpws7.ihep.ac.cn> cc: roottalk@hpsalo.cern.ch Subject: Re: your mail Message-ID: <Pine.VMS.3.91-b11-vms.981204111913.20688A-100000@polar.ihep.su> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Dear Canguo, > Thank you very much for offering answer and help to my question on how to > read key'ed free formatted ascii data. I've tried to understand your code > (perhaps a schematic one). I believe it does the job. However, it seems > FFKEY is called for each integer or float number or an 1-d array. Then does > this mean a card can contain only a single integer or a float number > or an 1-d array? Yes. Available types are INTEGER, REAL and 1-dim array of INTEGER of FLOAT. It is possible to add CHARACTER type too. > > ffkey_(key,ptr,Nvar,type,strlen(key),strlen(type)); > > Is this the way to call fortran subroutine ffkey_ (in FFREAD package) -- > adding 2 more arguments strlen(key), strlen(type) in the call? Exactly. I work on PC under Linux OS. If you pass character variable for fortran subroutine you must add it length to arguments list also. > I understand > fortran would require this info, but is the order implementation-independent? It works under Linux, HP-Unix. May be on other Unixes too. And it definitly should not work on M$Windows XXX. > Then I still need to "order" some features for the evolving ROOT, that > utilities for reading key'ed free format data cards be available. > I'm still in the process studying Rene Brun's reply(thanks to Rene), and > learning ROOT basics. I hope the answer is already in the ROOT. Please, use C++ code instead of FFREAD packet. Your code will be easy and more flexible. (I use FFREAD only because it is used in GEANT321.) With best wishes, Alexander.
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