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[glibc/history.git] / stdio-common / reg-printf.c
blobb5cab679de0aec6a7f24df831187908af45abba0
1 /* Copyright (C) 1991,1996,1997,2002-2004,2009 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 <limits.h>
21 #include <printf.h>
22 #include <stddef.h>
23 #include <stdlib.h>
24 #include <bits/libc-lock.h>
27 /* Array of functions indexed by format character. */
28 libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table)
29 attribute_hidden;
30 printf_function **__printf_function_table attribute_hidden;
32 __libc_lock_define_initialized (static, lock)
34 int __register_printf_specifier (int, printf_function,
35 printf_arginfo_size_function);
36 int __register_printf_function (int, printf_function,
37 printf_arginfo_function);
40 /* Register FUNC to be called to format SPEC specifiers. */
41 int
42 __register_printf_specifier (spec, converter, arginfo)
43 int spec;
44 printf_function converter;
45 printf_arginfo_size_function arginfo;
47 if (spec < 0 || spec > (int) UCHAR_MAX)
49 __set_errno (EINVAL);
50 return -1;
53 int result = 0;
54 __libc_lock_lock (lock);
56 if (__printf_function_table == NULL)
58 __printf_arginfo_table = (printf_arginfo_size_function **)
59 calloc (UCHAR_MAX + 1, sizeof (void *) * 2);
60 if (__printf_arginfo_table == NULL)
62 result = -1;
63 goto out;
66 __printf_function_table = (printf_function **)
67 (__printf_arginfo_table + UCHAR_MAX + 1);
70 __printf_function_table[spec] = converter;
71 __printf_arginfo_table[spec] = arginfo;
73 out:
74 __libc_lock_unlock (lock);
76 return result;
78 weak_alias (__register_printf_specifier, register_printf_specifier)
81 /* Register FUNC to be called to format SPEC specifiers. */
82 int
83 __register_printf_function (spec, converter, arginfo)
84 int spec;
85 printf_function converter;
86 printf_arginfo_function arginfo;
88 return __register_printf_specifier (spec, converter,
89 (printf_arginfo_size_function*) arginfo);
91 weak_alias (__register_printf_function, register_printf_function)