/* vsprintf with automatic memory allocation.

   Copyright (C) 2002-2004, 2007-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3, or (at your option)

   any later version.

   This program 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 General Public License for more details.

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

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

#ifndef _VASNPRINTF_H

#define _VASNPRINTF_H

/* Get va_list.  */

#include <stdarg.h>

/* Get size_t.  */

#include <stddef.h>

#ifdef __cplusplus

extern "C" {

#endif

/* Write formatted output to a string dynamically allocated with malloc().

   You can pass a preallocated buffer for the result in RESULTBUF and its

   size in *LENGTHP; otherwise you pass RESULTBUF = NULL.

   If successful, return the address of the string (this may be = RESULTBUF

   if no dynamic memory allocation was necessary) and set *LENGTHP to the

   number of resulting bytes, excluding the trailing NUL.  Upon error, set

   errno and return NULL.

   When dynamic memory allocation occurs, the preallocated buffer is left

   alone (with possibly modified contents).  This makes it possible to use

   a statically allocated or stack-allocated buffer, like this:

          char buf[100];

          size_t len = sizeof (buf);

          char *output = vasnprintf (buf, &len, format, args);

          if (output == NULL)

            ... error handling ...;

          else

            {

              ... use the output string ...;

              if (output != buf)

                free (output);

            }

  */

#if REPLACE_VASNPRINTF

# define asnprintf rpl_asnprintf

# define vasnprintf rpl_vasnprintf

#endif

extern char * asnprintf (char *restrict resultbuf, size_t *lengthp,

                         const char *format, ...)

       _GL_ATTRIBUTE_FORMAT ((__printf__, 3, 4));

extern char * vasnprintf (char *restrict resultbuf, size_t *lengthp,

                          const char *format, va_list args)

       _GL_ATTRIBUTE_FORMAT ((__printf__, 3, 0));

#ifdef __cplusplus

}

#endif

#endif /* _VASNPRINTF_H */