xref: /original-bsd/usr.bin/pascal/libpc/TEOLN.c (revision c3e32dec)
1 /*-
2  * Copyright (c) 1979, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * %sccs.include.redist.c%
6  */
7 
8 #ifndef lint
9 static char sccsid[] = "@(#)TEOLN.c	8.1 (Berkeley) 06/06/93";
10 #endif /* not lint */
11 
12 #include "h00vars.h"
13 
14 bool
15 TEOLN(filep)
16 
17 	register struct iorec	*filep;
18 {
19 	if (filep->fblk >= MAXFILES || _actfile[filep->fblk] != filep ||
20 	    (filep->funit & FDEF)) {
21 		ERROR("Reference to an inactive file\n", 0);
22 		return;
23 	}
24 	if (filep->funit & FWRITE) {
25 		ERROR("%s: eoln is undefined on files open for writing\n",
26 		    filep->pfname);
27 		return;
28 	}
29 	IOSYNC(filep);
30 	if (filep->funit & EOFF) {
31 		ERROR("%s: eoln is undefined when eof is true\n",
32 		    filep->pfname);
33 		return;
34 	}
35 	if (filep->funit & EOLN)
36 		return TRUE;
37 	return FALSE;
38 }
39