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

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

static char sccsid[] = "@(#)UNSYNC.c 1.1 %G%";

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

/*
 * push back last char read to prepare for formatted read
 */
UNSYNC(curfile)

	register struct iorec	*curfile;
{
	if (curfile->funit & FWRITE) {
		ERROR(EREADIT, curfile->pfname);
		return;
	}
	if ((curfile->funit & SYNC) == 0) {
		ungetc(*curfile->fileptr, curfile->fbuf);
	}
}
Commit	Line	Data
0befb875 KM	1	/* Copyright (c) 1979 Regents of the University of California */
	2
	3	static char sccsid[] = "@(#)UNSYNC.c 1.1 %G%";
	4
	5	#include "h00vars.h"
	6	#include "h01errs.h"
	7
	8	/*
	9	* push back last char read to prepare for formatted read
	10	*/
	11	UNSYNC(curfile)
	12
	13	register struct iorec *curfile;
	14	{
	15	if (curfile->funit & FWRITE) {
	16	ERROR(EREADIT, curfile->pfname);
	17	return;
	18	}
	19	if ((curfile->funit & SYNC) == 0) {
	20	ungetc(*curfile->fileptr, curfile->fbuf);
	21	}
	22	}