Re: LF/CR conversion

[Andy McFadden <fadden@fadden.com>]

Jeff Blakeney <jeff.blakeney@a2central.com.remove-1ev-this> wrote:
> This is why I didn't finish my Applesoft program.  I was trying to
> avoid using GET as it is slow.  I was BLOADing the input file in
> chunks into memory but then I ran into a few problems like having to
> load the next chunk if the last character is a CR to see if the next
> character is a LF.

Instead of probing ahead, output your EOL (End-Of-Line) of choice
immediately and set an "I just read a CR" flag.  The next time through
the loop, if the current character is "LF" and the "I just read a CR"
flag is set, don't output anything.

Trying some pseudo-code:

 foundCR = false;
 until data done
  read a block of data
  until block done
   get char
   if (char == CR)
     output CR/LF/CRLF as desired
     foundCR = true
   else if (char == LF)
     if (foundCR)
       foundCR = false;
     else
       output CR/LF/CRLF as desired
   else
     foundCR = false;
     output char


This should convert any type of input (CR, LF, CRLF) to any other type of
input, and avoid any hairiness from CRLF straddling buffers.

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