[unix-history] / usr / src / lib / libc / stdio / ungetc.c

/*	ungetc.c	4.2	83/09/25	*/

#include <stdio.h>

ungetc(c, iop)
	register FILE *iop;
{
	if (c == EOF)
		return (-1);
	if ((iop->_flag&_IOREAD) == 0 || iop->_ptr <= iop->_base)
		if (iop->_ptr == iop->_base && iop->_cnt == 0)
			*iop->_ptr++;
		else
			return (EOF);
	iop->_cnt++;
	*--iop->_ptr = c;
	return (c);
}
Commit	Line	Data
bec69c1e SL	1	/* ungetc.c 4.2 83/09/25 */
bec69c1e SL	2
52dc310d BJ	3	#include <stdio.h>
	4
	5	ungetc(c, iop)
bec69c1e	6	register FILE *iop;
52dc310d BJ	7	{
52dc310d BJ	8	if (c == EOF)
bec69c1e SL	9	return (-1);
	10	if ((iop->_flag&_IOREAD) == 0 \|\| iop->_ptr <= iop->_base)
	11	if (iop->_ptr == iop->_base && iop->_cnt == 0)
52dc310d BJ	12	*iop->_ptr++;
52dc310d BJ	13	else
bec69c1e	14	return (EOF);
52dc310d BJ	15	iop->_cnt++;
52dc310d BJ	16	*--iop->_ptr = c;
bec69c1e	17	return (c);
52dc310d	18	}