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To: cs551@merlot.usc.edu
Subject: Re: Store Format
Date: Mon, 17 Nov 2008 08:56:10 -0800
From: Bill Cheng <william@bourbon.usc.edu>

Someone wrote:

  > Do the <CR><LF> characters account for 2 bytes in the packet ?

Yes, for each line.

  > Basically, do we have to put 2 newline characters in the file, one for <CR>
  > and one for <LF> ? How are these characters stored exactly ?

They are not 2 newline characters.  <CR> is "carriage return"
and <LF> is "line feed" which is the newline character.
Normally for UNIX, if you want to write out a line to the
terminal, you would do something like:

    printf("hello\n");

The last character is <LF>.  To print the same line with
<CR><LF>, you can do:

    printf("hello\r\n");

"\r" is <CR>.
--
Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>




  On Sun, Nov 16, 2008 at 10:31 PM, Bill Cheng <william@bourbon.usc.edu>wrote:
  > Someone wrote:
  >
  >  > It has been mentioned that all the metadata parameters are followed by a
  >  > <cr><lf> . I understand that we have to include them while writing to a
  >  > file, but do we also have to append the <cr><lf> characters while
  > forming
  >  > the store packet as well ?
  >
  > Yes.  (When you format the STORE message, you should just
  > read the metadata file and copy the data into the message.
  > So, if the <CR><LF> is already there, you don't need to do
  > anything extra.
  > --
  > Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>