lib/unistdio/u-vasprintf.h

   1 /* Formatted output to strings.
   2    Copyright (C) 1999, 2002, 2006-2018 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify it
   5    under the terms of the GNU Lesser General Public License as published
   6    by the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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 License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 int
  18 VASPRINTF (DCHAR_T **resultp, const FCHAR_T *format, va_list args)
  19 {
  20   size_t length;
  21   DCHAR_T *result = VASNPRINTF (NULL, &length, format, args);
  22   if (result == NULL)
  23     return -1;
  24
  25   if (length > INT_MAX)
  26     {
  27       free (result);
  28       errno = EOVERFLOW;
  29       return -1;
  30     }
  31
  32   *resultp = result;
  33   /* Return the number of resulting units, excluding the trailing NUL.  */
  34   return length;
  35 }