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Commit | Line | Data |
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d614a753 | 1 | /* Copyright (C) 1991-2020 Free Software Foundation, Inc. |
c84142e8 UD |
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 | |
41bdb6e2 AJ |
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. | |
c84142e8 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
c84142e8 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 17 | |
28f540f4 RM |
18 | #include <errno.h> |
19 | #include <limits.h> | |
20 | #include <printf.h> | |
8e96ae1a | 21 | #include <stddef.h> |
379c9e03 | 22 | #include <stdlib.h> |
ec999b8e | 23 | #include <libc-lock.h> |
9d26efa9 | 24 | |
28f540f4 RM |
25 | |
26 | /* Array of functions indexed by format character. */ | |
9d26efa9 | 27 | libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table) |
c877418f | 28 | attribute_hidden; |
6455d255 | 29 | printf_function **__printf_function_table attribute_hidden; |
28f540f4 | 30 | |
9d26efa9 UD |
31 | __libc_lock_define_initialized (static, lock) |
32 | ||
33 | int __register_printf_specifier (int, printf_function, | |
34 | printf_arginfo_size_function); | |
20962acb | 35 | libc_hidden_proto (__register_printf_specifier) |
79937577 | 36 | int __register_printf_function (int, printf_function, |
9d26efa9 UD |
37 | printf_arginfo_function); |
38 | ||
a68b0d31 | 39 | |
28f540f4 RM |
40 | /* Register FUNC to be called to format SPEC specifiers. */ |
41 | int | |
f63f2bfd JM |
42 | __register_printf_specifier (int spec, printf_function converter, |
43 | printf_arginfo_size_function arginfo) | |
28f540f4 RM |
44 | { |
45 | if (spec < 0 || spec > (int) UCHAR_MAX) | |
46 | { | |
c4029823 | 47 | __set_errno (EINVAL); |
28f540f4 RM |
48 | return -1; |
49 | } | |
50 | ||
9d26efa9 UD |
51 | int result = 0; |
52 | __libc_lock_lock (lock); | |
53 | ||
c877418f RM |
54 | if (__printf_function_table == NULL) |
55 | { | |
9d26efa9 | 56 | __printf_arginfo_table = (printf_arginfo_size_function **) |
d0f534e9 | 57 | calloc (UCHAR_MAX + 1, sizeof (void *) * 2); |
c877418f | 58 | if (__printf_arginfo_table == NULL) |
9d26efa9 UD |
59 | { |
60 | result = -1; | |
61 | goto out; | |
62 | } | |
63 | ||
c877418f RM |
64 | __printf_function_table = (printf_function **) |
65 | (__printf_arginfo_table + UCHAR_MAX + 1); | |
66 | } | |
67 | ||
68 | __printf_function_table[spec] = converter; | |
28f540f4 | 69 | __printf_arginfo_table[spec] = arginfo; |
28f540f4 | 70 | |
9d26efa9 UD |
71 | out: |
72 | __libc_lock_unlock (lock); | |
73 | ||
74 | return result; | |
75 | } | |
20962acb | 76 | libc_hidden_def (__register_printf_specifier) |
9d26efa9 UD |
77 | weak_alias (__register_printf_specifier, register_printf_specifier) |
78 | ||
79 | ||
80 | /* Register FUNC to be called to format SPEC specifiers. */ | |
81 | int | |
f63f2bfd JM |
82 | __register_printf_function (int spec, printf_function converter, |
83 | printf_arginfo_function arginfo) | |
9d26efa9 UD |
84 | { |
85 | return __register_printf_specifier (spec, converter, | |
86 | (printf_arginfo_size_function*) arginfo); | |
28f540f4 | 87 | } |
23396375 | 88 | weak_alias (__register_printf_function, register_printf_function) |