Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!uwvax!tank!dwayne@rover.bsd.uchicago.edu
From: dwayne@rover.bsd.uchicago.edu
Newsgroups: comp.lang.pascal
Subject: Re: VAX Pascal question
Message-ID: <3921@tank.uchicago.edu>
Date: 19 Jun 89 14:14:19 GMT
Sender: news@tank.uchicago.edu
Organization: University of Chicago - Dept. Rad. Onc. and Med. Physics
Lines: 14

In article <711@soleil.UUCP>, eam@soleil.UUCP (Ed A. Mills) writes...
>Has anyone figured out a way to flush the lazy-lookahead buffer in VAX_Pascal
>without doing a read or writeln?  I've tried system services, and even gone
>so far as to write a C routine using flush, none of which had any success.

If I understand the question, are you talking about those strange times
when pascal sometimes sees a terminator and skips past your readln?  If
so, then you can do a reset(input) before the call, thus moving the 
type-ahead buffer pointer to the front of the buffer.  If you are
using smg calls then you can use trm$m_tm_purge for the modifiers
field or if you are doing sysqios then io$m_purge should do it too.

Dwayne Spradlin
dwayne@rover.uchicago.edu