1 /* Copyright (C) 1991-2019 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, see
16 <http://www.gnu.org/licenses/>. */
23 #include <libc-lock.h>
26 /* Array of functions indexed by format character. */
27 libc_freeres_ptr (printf_arginfo_size_function
**__printf_arginfo_table
)
29 printf_function
**__printf_function_table attribute_hidden
;
31 __libc_lock_define_initialized (static, lock
)
33 int __register_printf_specifier (int, printf_function
,
34 printf_arginfo_size_function
);
35 libc_hidden_proto (__register_printf_specifier
)
36 int __register_printf_function (int, printf_function
,
37 printf_arginfo_function
);
40 /* Register FUNC to be called to format SPEC specifiers. */
42 __register_printf_specifier (int spec
, printf_function converter
,
43 printf_arginfo_size_function arginfo
)
45 if (spec
< 0 || spec
> (int) UCHAR_MAX
)
52 __libc_lock_lock (lock
);
54 if (__printf_function_table
== NULL
)
56 __printf_arginfo_table
= (printf_arginfo_size_function
**)
57 calloc (UCHAR_MAX
+ 1, sizeof (void *) * 2);
58 if (__printf_arginfo_table
== NULL
)
64 __printf_function_table
= (printf_function
**)
65 (__printf_arginfo_table
+ UCHAR_MAX
+ 1);
68 __printf_function_table
[spec
] = converter
;
69 __printf_arginfo_table
[spec
] = arginfo
;
72 __libc_lock_unlock (lock
);
76 libc_hidden_def (__register_printf_specifier
)
77 weak_alias (__register_printf_specifier
, register_printf_specifier
)
80 /* Register FUNC to be called to format SPEC specifiers. */
82 __register_printf_function (int spec
, printf_function converter
,
83 printf_arginfo_function arginfo
)
85 return __register_printf_specifier (spec
, converter
,
86 (printf_arginfo_size_function
*) arginfo
);
88 weak_alias (__register_printf_function
, register_printf_function
)