| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1991-2015 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 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <limits.h> |
| 20 | #include <printf.h> |
| 21 | #include <stddef.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <bits/libc-lock.h> |
| 24 | |
| 25 | |
| 26 | /* Array of functions indexed by format character. */ |
| 27 | libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table) |
| 28 | attribute_hidden; |
| 29 | printf_function **__printf_function_table attribute_hidden; |
| 30 | |
| 31 | __libc_lock_define_initialized (static, lock) |
| 32 | |
| 33 | int __register_printf_specifier (int, printf_function, |
| 34 | printf_arginfo_size_function); |
| 35 | int __register_printf_function (int, printf_function, |
| 36 | printf_arginfo_function); |
| 37 | |
| 38 | |
| 39 | /* Register FUNC to be called to format SPEC specifiers. */ |
| 40 | int |
| 41 | __register_printf_specifier (spec, converter, arginfo) |
| 42 | int spec; |
| 43 | printf_function converter; |
| 44 | printf_arginfo_size_function arginfo; |
| 45 | { |
| 46 | if (spec < 0 || spec > (int) UCHAR_MAX) |
| 47 | { |
| 48 | __set_errno (EINVAL); |
| 49 | return -1; |
| 50 | } |
| 51 | |
| 52 | int result = 0; |
| 53 | __libc_lock_lock (lock); |
| 54 | |
| 55 | if (__printf_function_table == NULL) |
| 56 | { |
| 57 | __printf_arginfo_table = (printf_arginfo_size_function **) |
| 58 | calloc (UCHAR_MAX + 1, sizeof (void *) * 2); |
| 59 | if (__printf_arginfo_table == NULL) |
| 60 | { |
| 61 | result = -1; |
| 62 | goto out; |
| 63 | } |
| 64 | |
| 65 | __printf_function_table = (printf_function **) |
| 66 | (__printf_arginfo_table + UCHAR_MAX + 1); |
| 67 | } |
| 68 | |
| 69 | __printf_function_table[spec] = converter; |
| 70 | __printf_arginfo_table[spec] = arginfo; |
| 71 | |
| 72 | out: |
| 73 | __libc_lock_unlock (lock); |
| 74 | |
| 75 | return result; |
| 76 | } |
| 77 | weak_alias (__register_printf_specifier, register_printf_specifier) |
| 78 | |
| 79 | |
| 80 | /* Register FUNC to be called to format SPEC specifiers. */ |
| 81 | int |
| 82 | __register_printf_function (spec, converter, arginfo) |
| 83 | int spec; |
| 84 | printf_function converter; |
| 85 | printf_arginfo_function arginfo; |
| 86 | { |
| 87 | return __register_printf_specifier (spec, converter, |
| 88 | (printf_arginfo_size_function*) arginfo); |
| 89 | } |
| 90 | weak_alias (__register_printf_function, register_printf_function) |