1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stdarg.h>
      19  #include <libio/libioP.h>
      20  
      21  
      22  /* Write formatted output into S, according to the format string FORMAT,
      23     writing no more than MAXLEN characters.  */
      24  int
      25  __swprintf_chk (wchar_t *s, size_t maxlen, int flag, size_t slen,
      26  		const wchar_t *format, ...)
      27  {
      28    if (__glibc_unlikely (slen < maxlen))
      29      __chk_fail ();
      30  
      31    /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
      32       can only come from read-only format strings.  */
      33    unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
      34    va_list ap;
      35    int ret;
      36  
      37    va_start (ap, format);
      38    ret = __vswprintf_internal (s, maxlen, format, ap, mode);
      39    va_end (ap);
      40  
      41    return ret;
      42  }