/* Obstack wrapper for GDB.

   Copyright (C) 2013-2022 Free Software Foundation, Inc.

   This file is part of GDB.

   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 of the License, 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 <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "gdb_obstack.h"
#include <stdio.h>

/* Concatenate NULL terminated variable argument list of `const char *'
   strings; return the new string.  Space is found in the OBSTACKP.
   Argument list must be terminated by a sentinel expression `(char *)
   NULL'.  */

char *
obconcat (struct obstack *obstackp, ...)
{
  va_list ap;

  va_start (ap, obstackp);
  for (;;)
    {
      const char *s = va_arg (ap, const char *);

      if (s == NULL)
	break;

      obstack_grow_str (obstackp, s);
    }
  va_end (ap);
  obstack_1grow (obstackp, 0);

  return (char *) obstack_finish (obstackp);
}

/* See gdb_obstack.h.  */

const char *
gdb_obstack_vprintf (obstack *ob, const char *fmt, va_list args)
{
  va_list args_copy;

  va_copy (args_copy, args);
  size_t size = vsnprintf (nullptr, 0, fmt, args_copy);
  va_end (args_copy);

  char *str = XOBNEWVEC (ob, char, size + 1);
  vsprintf (str, fmt, args);

  return str;
}

/* See gdb_obstack.h.  */

const char *
gdb_obstack_printf (obstack *ob, const char *fmt, ...)
{
  va_list args;

  va_start (args, fmt);
  const char *str = gdb_obstack_vprintf (ob, fmt, args);
  va_end (args);

  return str;
}