[unix-history] / usr / src / usr.bin / pascal / libpc / FNIL.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)FNIL.c 1.2 %G%";

#include "h00vars.h"
#include "h01errs.h"

char *
FNIL(curfile)

	register struct iorec	*curfile;
{
	if (curfile->fblk >= MAXFILES || _actfile[curfile->fblk] != curfile) {
		ERROR(ENOFILE, 0);
		return;
	}
	if (curfile->funit & FDEF) {
		ERROR(EREFINAF, curfile->pfname);
		return;
	}
	if (curfile->funit & FREAD) {
		IOSYNC(curfile);
	}
	return curfile->fileptr;
}
Commit	Line	Data
9873497c KM	1	/* Copyright (c) 1979 Regents of the University of California */
9873497c KM	2
29b34693	3	static char sccsid[] = "@(#)FNIL.c 1.2 %G%";
9873497c KM	4
	5	#include "h00vars.h"
	6	#include "h01errs.h"
	7
	8	char *
	9	FNIL(curfile)
	10
	11	register struct iorec *curfile;
	12	{
	13	if (curfile->fblk >= MAXFILES \|\| _actfile[curfile->fblk] != curfile) {
	14	ERROR(ENOFILE, 0);
	15	return;
	16	}
	17	if (curfile->funit & FDEF) {
	18	ERROR(EREFINAF, curfile->pfname);
	19	return;
	20	}
	21	if (curfile->funit & FREAD) {
	22	IOSYNC(curfile);
9873497c KM	23	}
	24	return curfile->fileptr;
	25	}