Hello, It has been 3 years since I asked for advise on how to build byte-indexes in huge files from pattern matching ( http://tinyurl.com/bnyts52 ) I have been operating with a "system" call to grep ever since, but that is obviously not portable (first and foremost to standard Windows systems). I have been searching around, but can't find any newer solutions (as bindings to tre or RE2). Did I overlook anything? Are there newish tools on streaming file usage? Thankful for any hint,Joh