make return values correspond to man page; from lepreau@utah-cs

[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);
}