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From: philip@pescadero.Stanford.EDU (Philip Machanick)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Reading Text With Pointers...
Message-ID: <1990Dec31.050056.1240@Neon.Stanford.EDU>
Date: 31 Dec 90 05:00:56 GMT
References: <50164@cornell.UUCP> <22358@well.sf.ca.us>
Sender: news@Neon.Stanford.EDU (USENET News System)
Reply-To: philip@pescadero.stanford.edu
Organization: Computer Science Department, Stanford University
Lines: 24

In article <22358@well.sf.ca.us>, oster@well.sf.ca.us (David Phillip Oster) writes:
|> In article <50164@cornell.UUCP> wayner@kama.cs.cornell.edu (Peter Wayner) writes:
|> >If I read in a file of text, each character fills a byte. The
|> >problem is that the 68000 doesn't allow unalligned access, but
|> >the 68020/30 does. What is the best way to pull of characters
|> >one by one? 
|> Pulling the characters one by one is not a problem on the 68000. Byte
|> access is always legal, alignment doesn't enter into it. The problme comes
|> when you want to access Integer data that is not aligned on an even boundary.
|> 	Ptr bufferPtr;
|> 	...
|> 	nextChar := bufferPtr^;
|> 	bufferPtr := bufferPtr + 1;
|> for single char data.

Simpler still (though you may have to turn off array bound checking):

      bufferPtr : ^packed array [1..whatever] of char;
      {create space for the array and fill it}
      for i:=1 to size of array
         nextchar := bufferPtr^[i];
-- 
Philip Machanick
philip@pescadero.stanford.edu