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

#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(-1);
	iop->_cnt++;
	*--iop->_ptr = c;
	return(0);
}
Commit	Line	Data
18e5fa7e BJ	1	#include <stdio.h>
	2
	3	ungetc(c, iop)
	4	register FILE *iop;
	5	{
	6	if (c == EOF)
	7	return(-1);
	8	if ((iop->_flag&_IOREAD)==0 \|\| iop->_ptr <= iop->_base)
	9	if (iop->_ptr == iop->_base && iop->_cnt==0)
	10	*iop->_ptr++;
	11	else
	12	return(-1);
	13	iop->_cnt++;
	14	*--iop->_ptr = c;
	15	return(0);
	16	}