int
_IO_ungetc (int c, _IO_FILE *fp)
{
int result;
CHECK_FILE (fp, EOF);
if (c == EOF)
return EOF;
if (!_IO_need_lock (fp))
return _IO_sputbackc (fp, (unsigned char) c);
_IO_acquire_lock (fp);
result = _IO_sputbackc (fp, (unsigned char) c);
_IO_release_lock (fp);
return result;
}
_IO_size_t
_IO_getline_info (_IO_FILE *fp, char *buf, _IO_size_t n, int delim,
int extract_delim, int *eof)
{
char *ptr = buf;
if (eof != NULL)
*eof = 0;
if (__builtin_expect (fp->_mode, -1) == 0)
_IO_fwide (fp, -1);
while (n != 0)
{
_IO_ssize_t len = fp->_IO_read_end - fp->_IO_read_ptr;
if (len <= 0)
{
int c = __uflow (fp);
if (c == EOF)
{
if (eof)
*eof = c;
break;
}
if (c == delim)
{
if (extract_delim > 0)
*ptr++ = c;
else if (extract_delim < 0)
_IO_sputbackc (fp, c);
if (extract_delim > 0)
++len;
return ptr - buf;
}
*ptr++ = c;
n--;
}
else
{
char *t;
if ((_IO_size_t) len >= n)
len = n;
t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len);
if (t != NULL)
{
_IO_size_t old_len = ptr-buf;
len = t - fp->_IO_read_ptr;
if (extract_delim >= 0)
{
++t;
if (extract_delim > 0)
++len;
}
memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
fp->_IO_read_ptr = t;
return old_len + len;
}
memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
fp->_IO_read_ptr += len;
ptr += len;
n -= len;
}
}
return ptr - buf;
}
_IO_size_t
_IO_getwline_info (_IO_FILE *fp, wchar_t *buf, _IO_size_t n, wint_t delim,
int extract_delim, wint_t *eof)
{
wchar_t *ptr = buf;
if (eof != NULL)
*eof = 0;
if (__builtin_expect (fp->_mode, 1) == 0)
_IO_fwide (fp, 1);
while (n != 0)
{
_IO_ssize_t len = (fp->_wide_data->_IO_read_end
- fp->_wide_data->_IO_read_ptr);
if (len <= 0)
{
wint_t wc = __wuflow (fp);
if (wc == WEOF)
{
if (eof)
*eof = wc;
break;
}
if (wc == delim)
{
if (extract_delim > 0)
*ptr++ = wc;
else if (extract_delim < 0)
_IO_sputbackc (fp, wc);
if (extract_delim > 0)
++len;
return ptr - buf;
}
*ptr++ = wc;
n--;
}
else
{
wchar_t *t;
if ((_IO_size_t) len >= n)
len = n;
t = wmemchr ((void *) fp->_wide_data->_IO_read_ptr, delim, len);
if (t != NULL)
{
_IO_size_t old_len = ptr - buf;
len = t - fp->_wide_data->_IO_read_ptr;
if (extract_delim >= 0)
{
++t;
if (extract_delim > 0)
++len;
}
wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr,
len);
fp->_wide_data->_IO_read_ptr = t;
return old_len + len;
}
wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, len);
fp->_wide_data->_IO_read_ptr += len;
ptr += len;
n -= len;
}
}
return ptr - buf;
}
