/* Formatted output to strings.

   Copyright (C) 1999-2025 Free Software Foundation, Inc.

   This file is free software: you can redistribute it and/or modify

   it under the terms of the GNU Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 of the

   License, or (at your option) any later version.

   This file is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */

#include <stdio.h>

#include <errno.h>

#include <stdint.h>

#include <stdlib.h>

#include "vasnprintf.h"

ptrdiff_t

vaszprintf (char **resultp, const char *format, va_list args)

{

  size_t length;

  char *result = vasnprintf (NULL, &length, format, args);

  if (result == NULL)

    return -1;

  if (length > PTRDIFF_MAX)

    {

      free (result);

      errno = ENOMEM;

      return -1;

    }

  *resultp = result;

  /* Return the number of resulting bytes, excluding the trailing NUL.  */

  return length;

}