Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!netsys!jsheese!jeffery
From: jeffery@jsheese.FIDONET.ORG (Jeff Sheese)
Newsgroups: comp.sys.ibm.pc
Subject: Re: using files in C on the IBM PC
Message-ID: <69.246B7C0A@jsheese.FIDONET.ORG>
Date: 13 May 89 00:46:17 GMT
Organization: JStek Enterprises - Frederick, MD
Lines: 25

References: <1989May11.203209.9152@ziebmef.uucp>

In an article of <12 May 89 00:32:07 GMT>, stephen@ziebmef.uucp (Stephen M.  
Dunn) writes:

 >   Okay, most or all of the common C compilers for DOS operate in
 >"cooked" mode by default on file accesses.  This means that they treat
 >^Z (otherwise known as EOF) as the end-of-file marker, and they will
 >play around with CRs and LFs.  There is another mode of file access
 >known as "raw" mode to DOS people and "binary" mode to C people.  Instead
 >of saying R or W as your file access mode, say RB or WB instead and
 >DOS will stop playing with your file.  You can then read or write 
 >whatever character codes your heart desires without fear of intervention 
 >from DOS.

Turbo C has a feof() function to determine the logical end of file, regardless  
of the ^Z.  Using ^Z as an EOF mark is a layover from CP/M days for  
compatibility reasons.
 
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