1/* Copyright (C) 2009-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library 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
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <printf.h>
20#include <stdlib.h>
21#include <libc-lock.h>
22
23
24/* Array of functions indexed by format character. */
25libc_freeres_ptr (printf_va_arg_function **__printf_va_arg_table)
26 attribute_hidden;
27
28__libc_lock_define_initialized (static, lock);
29
30/* Last type allocated. */
31static int pa_next_type = PA_LAST;
32
33
34int
35__register_printf_type (printf_va_arg_function fct)
36{
37 int result = -1;
38 __libc_lock_lock (lock);
39
40 if (__printf_va_arg_table == NULL)
41 {
42 __printf_va_arg_table = (printf_va_arg_function **)
43 calloc (0x100 - PA_LAST, sizeof (void *));
44 if (__printf_va_arg_table == NULL)
45 goto out;
46 }
47
48 if (pa_next_type == 0x100)
49 __set_errno (ENOSPC);
50 else
51 {
52 result = pa_next_type++;
53 __printf_va_arg_table[result - PA_LAST] = fct;
54 }
55
56 out:
57 __libc_lock_unlock (lock);
58
59 return result;
60}
61weak_alias (__register_printf_type, register_printf_type)
62