wint_t
_IO_sungetwc (FILE *fp)
{
wint_t result;
if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base)
{
fp->_wide_data->_IO_read_ptr--;
result = *fp->_wide_data->_IO_read_ptr;
}
else
result = _IO_PBACKFAIL (fp, EOF);
if (result != WEOF)
fp->_flags &= ~_IO_EOF_SEEN;
return result;
}
int
_IO_sungetc (_IO_FILE *fp)
{
int result;
if (fp->_IO_read_ptr > fp->_IO_read_base)
{
fp->_IO_read_ptr--;
result = (unsigned char) *fp->_IO_read_ptr;
}
else
result = _IO_PBACKFAIL (fp, EOF);
if (result != EOF)
fp->_flags &= ~_IO_EOF_SEEN;
return result;
}
wint_t
_IO_sputbackwc (FILE *fp, wint_t c)
{
wint_t result;
if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base
&& (wchar_t)fp->_wide_data->_IO_read_ptr[-1] == (wchar_t) c)
{
fp->_wide_data->_IO_read_ptr--;
result = c;
}
else
result = _IO_PBACKFAIL (fp, c);
if (result != WEOF)
fp->_flags &= ~_IO_EOF_SEEN;
return result;
}
int
_IO_sputbackc (_IO_FILE *fp, int c)
{
int result;
if (fp->_IO_read_ptr > fp->_IO_read_base
&& (unsigned char)fp->_IO_read_ptr[-1] == (unsigned char)c)
{
fp->_IO_read_ptr--;
result = (unsigned char) c;
}
else
result = _IO_PBACKFAIL (fp, c);
if (result != EOF)
fp->_flags &= ~_IO_EOF_SEEN;
return result;
}
