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[glibc/history.git] / stdio-common / reg-type.c
blob7a96b2893a6aac09bd5aee6ac7b2c72534f5d0b4
1 /* Copyright (C) 2009 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <printf.h>
21 #include <stdlib.h>
22 #include <bits/libc-lock.h>
25 /* Array of functions indexed by format character. */
26 libc_freeres_ptr (printf_va_arg_function **__printf_va_arg_table)
27 attribute_hidden;
29 __libc_lock_define_initialized (static, lock);
31 /* Last type allocated. */
32 static int pa_next_type = PA_LAST;
35 int
36 __register_printf_type (printf_va_arg_function fct)
38 int result = -1;
39 __libc_lock_lock (lock);
41 if (__printf_va_arg_table == NULL)
43 __printf_va_arg_table = (printf_va_arg_function **)
44 calloc (0x100 - PA_LAST, sizeof (void *));
45 if (__printf_va_arg_table == NULL)
46 goto out;
49 if (pa_next_type == 0x100)
50 __set_errno (ENOSPC);
51 else
53 result = pa_next_type++;
54 __printf_va_arg_table[result - PA_LAST] = fct;
57 out:
58 __libc_lock_unlock (lock);
60 return result;
62 weak_alias (__register_printf_type, register_printf_type)