int
_IO_vswprintf (wchar_t *string, _IO_size_t maxlen, const wchar_t *format,
_IO_va_list args)
{
_IO_wstrnfile sf;
int ret;
struct _IO_wide_data wd;
#ifdef _IO_MTSAFE_IO
sf.f._sbf._f._lock = NULL;
#endif
if (maxlen == 0)
/* Since we have to write at least the terminating L'\0' a buffer
length of zero always makes the function fail. */
return -1;
_IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, 0, &wd, &_IO_wstrn_jumps);
_IO_fwide (&sf.f._sbf._f, 1);
string[0] = L'\0';
_IO_wstr_init_static (&sf.f._sbf._f, string, maxlen - 1, string);
ret = _IO_vfwprintf ((_IO_FILE *) &sf.f._sbf, format, args);
if (sf.f._sbf._f._wide_data->_IO_buf_base == sf.overflow_buf)
/* ISO C99 requires swprintf/vswprintf to return an error if the
output does not fit in the provided buffer. */
return -1;
/* Terminate the string. */
*sf.f._sbf._f._wide_data->_IO_write_ptr = '\0';
return ret;
}
int
__vswscanf (const wchar_t *string, const wchar_t *format, _IO_va_list args)
{
int ret;
_IO_strfile sf;
struct _IO_wide_data wd;
#ifdef _IO_MTSAFE_IO
sf._sbf._f._lock = NULL;
#endif
_IO_no_init (&sf._sbf._f, _IO_USER_LOCK, 0, &wd, &_IO_wstr_jumps);
_IO_fwide (&sf._sbf._f, 1);
_IO_wstr_init_static (&sf._sbf._f, (wchar_t *)string, 0, NULL);
ret = _IO_vfwscanf ((_IO_FILE *) &sf._sbf, format, args, NULL);
return ret;
}
/* VARARGS5 */
int
__vswprintf_chk (wchar_t *s, size_t maxlen, int flags, size_t slen,
const wchar_t *format, va_list args)
{
/* XXX Maybe for less strict version do not fail immediately.
Though, maxlen is supposed to be the size of buffer pointed
to by s, so a conforming program can't pass such maxlen
to *snprintf. */
if (__builtin_expect (slen < maxlen, 0))
__chk_fail ();
_IO_wstrnfile sf;
struct _IO_wide_data wd;
int ret;
#ifdef _IO_MTSAFE_IO
sf.f._sbf._f._lock = NULL;
#endif
/* We need to handle the special case where MAXLEN is 0. Use the
overflow buffer right from the start. */
if (__builtin_expect (maxlen == 0, 0))
/* Since we have to write at least the terminating L'\0' a buffer
length of zero always makes the function fail. */
return -1;
_IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, 0, &wd, &_IO_wstrn_jumps);
_IO_fwide (&sf.f._sbf._f, 1);
s[0] = L'\0';
/* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
can only come from read-only format strings. */
if (flags > 0)
sf.f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY;
_IO_wstr_init_static (&sf.f._sbf._f, s, maxlen - 1, s);
ret = _IO_vfwprintf ((_IO_FILE *) &sf.f._sbf, format, args);
if (sf.f._sbf._f._wide_data->_IO_buf_base == sf.overflow_buf)
/* ISO C99 requires swprintf/vswprintf to return an error if the
output does not fit int he provided buffer. */
return -1;
/* Terminate the string. */
*sf.f._sbf._f._wide_data->_IO_write_ptr = '\0';
return ret;
}
