/* Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library 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.

   The GNU C Library 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <limits.h>

#include <printf.h>

#include <stddef.h>

#include <stdlib.h>

#include <libc-lock.h>

/* Array of functions indexed by format character.  */

libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table)

  attribute_hidden;

printf_function **__printf_function_table attribute_hidden;

__libc_lock_define_initialized (static, lock)

int __register_printf_specifier (int, printf_function,

				 printf_arginfo_size_function);

libc_hidden_proto (__register_printf_specifier)

int __register_printf_function (int, printf_function,

				printf_arginfo_function);

/* Register FUNC to be called to format SPEC specifiers.  */

int

__register_printf_specifier (int spec, printf_function converter,

			     printf_arginfo_size_function arginfo)

{

  if (spec < 0 || spec > (int) UCHAR_MAX)

    {

      __set_errno (EINVAL);

      return -1;

    }

  int result = 0;

  __libc_lock_lock (lock);

  if (__printf_function_table == NULL)

    {

      __printf_arginfo_table = (printf_arginfo_size_function **)

	calloc (UCHAR_MAX + 1, sizeof (void *) * 2);

      if (__printf_arginfo_table == NULL)

	{

	  result = -1;

	  goto out;

	}

      __printf_function_table = (printf_function **)

	(__printf_arginfo_table + UCHAR_MAX + 1);

    }

  __printf_function_table[spec] = converter;

  __printf_arginfo_table[spec] = arginfo;

 out:

  __libc_lock_unlock (lock);

  return result;

}

libc_hidden_def (__register_printf_specifier)

weak_alias (__register_printf_specifier, register_printf_specifier)

/* Register FUNC to be called to format SPEC specifiers.  */

int

__register_printf_function (int spec, printf_function converter,

			    printf_arginfo_function arginfo)

{

  return __register_printf_specifier (spec, converter,

				      (printf_arginfo_size_function*) arginfo);

}

weak_alias (__register_printf_function, register_printf_function)