C0361@univscvm.csd.scarolina.edu ( Thomas Jenkins) (10/27/90)
Hello, I've written a generic indexed file UNIT. It will work with your defined records and can optionally encrypt the files ( index and base ) as well. The actual encryption steps are left out ( to aviod problems ) but the READ.ME file included explaines the method I used ( very simple, but it works :-) ). Also included in the generic Encryption UNIT! This UNIT will allow you to encrypt any user defined record! The encryption is done when each record is written and the file is NEVER decrypted. As each record is read, the Read procedure decrypts the record IN MEMORY. If anyone is interested in these units ( units, READ.ME, and four example programs ), I have them ZIPed and XXEncoded to send out. Please remember that the IndexedFile UNIT was written in two days and is not optimised ( but seeks are reasonably fast do to a binary file search ). The sort done on the new index file is slow - OK so it's a bubble sort - but the file is sorted a 11 members and I haven't has time to put in a binary search yet! Anyone interested please contact me at the below addresses, tom THOMAS E. JENKINS, JR. PROGRAMMER, UNIVERSITY OF SOUTH CAROLINA BITNET, C0361 AT UNIVSCVM.BITNET INTERNET C0361 AT UNIVSCVM.CSD.SCAROLINA.EDU