[Info-vax] RMS internals?

[Hein, Nashua NH]

Howard wrote,
>>Given the link sent earlier, I'm a little concerned about other
>>possible  implementations of VARIABLE records.

> - The record length words are word aligned, so there may be round-up
> bytes (nice place to store a secret message :-)
> - There is an MSB variable lenght flavor with the lenght word bytes
> swapped. Created to support certain CD's. Never used really.
> - Guess you should take care of VFC records as well, and notably
> decide whether to interpret PRN/VFC data or pass binary

Hit 'send' too soon. Meant too add

- If you see a negative length word (-1) then skip to the beginning of
the next block. It that brings you to EOF, then you are done, but it
might be the result of 'un-committed' record in RU-Journalling, or an
application mimicking that. For 'deleted' records crossing block
boundaries, there may be a series of those skip-to-the-next-block
indicators.

Also, the OpenVMS guide to files, chapter 2 should not be ignored

Hein.
:
http://h71000.www7.hp.com/doc/731final/4506/4506pro.html


http://h71000.www7.hp.com/doc/731final/4506/4506pro.html