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From: augart@h-sc1.UUCP (Steven Augart)
Newsgroups: net.lang.c
Subject: Re: How about a predefined #FILE, #PATH and #FUNCTION for C?
Message-ID: <887@h-sc1.UUCP>
Date: Mon, 27-Jan-86 17:43:02 EST
Article-I.D.: h-sc1.887
Posted: Mon Jan 27 17:43:02 1986
Date-Received: Wed, 29-Jan-86 06:36:18 EST
References: <312@yale.ARPA
Organization: Harvard Univ. Science Center
Lines: 22

I cannot claim to speak about other versions of unix, but in Berkeley
4.2 and 4.3, there are two macros automatically defined for you by the
c preprocessor: __FILE__ and __LINE__.

Here's how I use them:
char * foo;
char * malloc();
unsigned room;
[ code .... ]
if ((foo = malloc(room)) == (char *) NULL)
{
    fprintf(stderr, "Out of memory on line %d of file %s!\n", __LINE__, 
			__FILE__);
    exit(1);
}

Could someone on a non-4.2/4.3 BSD machine tell us if this facility is
part of other preprocessors as well?  Thanks.

Steven Augart
swa@borax.lcs.mit.edu
(617) 498-6352