| /* Copyright (C) 1991-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <limits.h> |
| #include <printf.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <bits/libc-lock.h> |
| |
| |
| /* Array of functions indexed by format character. */ |
| libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table) |
| attribute_hidden; |
| printf_function **__printf_function_table attribute_hidden; |
| |
| __libc_lock_define_initialized (static, lock) |
| |
| int __register_printf_specifier (int, printf_function, |
| printf_arginfo_size_function); |
| int __register_printf_function (int, printf_function, |
| printf_arginfo_function); |
| |
| |
| /* Register FUNC to be called to format SPEC specifiers. */ |
| int |
| __register_printf_specifier (spec, converter, arginfo) |
| int spec; |
| printf_function converter; |
| printf_arginfo_size_function arginfo; |
| { |
| if (spec < 0 || spec > (int) UCHAR_MAX) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| int result = 0; |
| __libc_lock_lock (lock); |
| |
| if (__printf_function_table == NULL) |
| { |
| __printf_arginfo_table = (printf_arginfo_size_function **) |
| calloc (UCHAR_MAX + 1, sizeof (void *) * 2); |
| if (__printf_arginfo_table == NULL) |
| { |
| result = -1; |
| goto out; |
| } |
| |
| __printf_function_table = (printf_function **) |
| (__printf_arginfo_table + UCHAR_MAX + 1); |
| } |
| |
| __printf_function_table[spec] = converter; |
| __printf_arginfo_table[spec] = arginfo; |
| |
| out: |
| __libc_lock_unlock (lock); |
| |
| return result; |
| } |
| weak_alias (__register_printf_specifier, register_printf_specifier) |
| |
| |
| /* Register FUNC to be called to format SPEC specifiers. */ |
| int |
| __register_printf_function (spec, converter, arginfo) |
| int spec; |
| printf_function converter; |
| printf_arginfo_function arginfo; |
| { |
| return __register_printf_specifier (spec, converter, |
| (printf_arginfo_size_function*) arginfo); |
| } |
| weak_alias (__register_printf_function, register_printf_function) |
