Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!ucsd!rutgers!att!ihlpb!gregg
From: gregg@ihlpb.ATT.COM (Wonderly)
Newsgroups: comp.lang.c
Subject: Re: File descriptors and streams and copying thereof.
Message-ID: <10222@ihlpb.ATT.COM>
Date: 15 Apr 89 20:45:35 GMT
References: <1672@fig.bbn.com>
Organization: AT&T Bell Laboratories - Naperville, Illinois
Lines: 17

From article <1672@fig.bbn.com>, by rsalz@bbn.com (Rich Salz):
> In article <1743@leah.Albany.Edu> rds95@leah.Albany.Edu (Robert Seals) writes:
> >I want to be able to make "stdin" read from someplace besides, well,
> >standard input in the middle of my program, and then go back to where
> >it was again.
> 
> Robert wants to have yyparse() read from a different file.  We did a
> go-round on this a couple of months ago.  The answer is to provide your
> own routine named input():

The external symbol, yyin, is a (FILE *) which lex uses to read from.  Yyin
is initialized with (stdin), so you can just change it to whatever stream you
need, and then change it back.

-- 
Gregg Wonderly                             DOMAIN: gregg@ihlpb.att.com
AT&T Bell Laboratories                     UUCP:   att!ihlpb!gregg