89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <limits.h>
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#include <printf.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <libc-lock.h>
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/* Array of functions indexed by format character. */
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libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table)
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attribute_hidden;
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printf_function **__printf_function_table attribute_hidden;
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__libc_lock_define_initialized (static, lock)
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int __register_printf_specifier (int, printf_function,
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printf_arginfo_size_function);
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libc_hidden_proto (__register_printf_specifier)
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int __register_printf_function (int, printf_function,
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printf_arginfo_function);
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/* Register FUNC to be called to format SPEC specifiers. */
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int
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__register_printf_specifier (int spec, printf_function converter,
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printf_arginfo_size_function arginfo)
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{
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if (spec < 0 || spec > (int) UCHAR_MAX)
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{
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__set_errno (EINVAL);
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return -1;
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}
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int result = 0;
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__libc_lock_lock (lock);
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if (__printf_function_table == NULL)
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{
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__printf_arginfo_table = (printf_arginfo_size_function **)
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calloc (UCHAR_MAX + 1, sizeof (void *) * 2);
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if (__printf_arginfo_table == NULL)
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{
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result = -1;
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goto out;
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}
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__printf_function_table = (printf_function **)
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(__printf_arginfo_table + UCHAR_MAX + 1);
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}
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__printf_function_table[spec] = converter;
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__printf_arginfo_table[spec] = arginfo;
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out:
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__libc_lock_unlock (lock);
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return result;
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}
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libc_hidden_def (__register_printf_specifier)
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weak_alias (__register_printf_specifier, register_printf_specifier)
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/* Register FUNC to be called to format SPEC specifiers. */
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int
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__register_printf_function (int spec, printf_function converter,
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printf_arginfo_function arginfo)
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{
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return __register_printf_specifier (spec, converter,
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(printf_arginfo_size_function*) arginfo);
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}
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weak_alias (__register_printf_function, register_printf_function)
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