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/* Copyright (C) 2009-2018 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 <stdlib.h>
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#include <wchar.h>
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#include <libc-lock.h>
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struct printf_modifier_record
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{
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struct printf_modifier_record *next;
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int bit;
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wchar_t str[0];
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};
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struct printf_modifier_record **__printf_modifier_table attribute_hidden;
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__libc_lock_define_initialized (static, lock)
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/* Bits to hand out. */
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static int next_bit;
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int
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__register_printf_modifier (const wchar_t *str)
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{
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if (str[0] == L'\0')
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{
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einval:
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__set_errno (EINVAL);
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return -1;
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}
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const wchar_t *wc = str;
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while (*wc != L'\0')
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if (*wc < 0 || *wc > (wchar_t) UCHAR_MAX)
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goto einval;
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else
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++wc;
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if (next_bit / 8 == sizeof (((struct printf_info *) NULL)->user))
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{
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__set_errno (ENOSPC);
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return -1;
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}
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int result = -1;
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__libc_lock_lock (lock);
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if (__printf_modifier_table == NULL)
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{
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__printf_modifier_table = calloc (UCHAR_MAX,
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sizeof (*__printf_modifier_table));
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if (__printf_modifier_table == NULL)
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goto out;
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}
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/* Create enough room for the string. But we don't need the first
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character. */
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struct printf_modifier_record *newp = malloc (sizeof (*newp)
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+ ((wc - str)
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* sizeof (wchar_t)));
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if (newp == NULL)
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goto out;
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newp->next = __printf_modifier_table[(unsigned char) *str];
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newp->bit = 1 << next_bit++;
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__wmemcpy (newp->str, str + 1, wc - str);
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__printf_modifier_table[(unsigned char) *str] = newp;
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result = newp->bit;
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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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weak_alias (__register_printf_modifier, register_printf_modifier)
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#include <stdio.h>
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int
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attribute_hidden
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__handle_registered_modifier_mb (const unsigned char **format,
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struct printf_info *info)
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{
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struct printf_modifier_record *runp = __printf_modifier_table[**format];
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int best_bit = 0;
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int best_len = 0;
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const unsigned char *best_cp = NULL;
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while (runp != NULL)
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{
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const unsigned char *cp = *format + 1;
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wchar_t *fcp = runp->str;
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while (*cp != '\0' && *fcp != L'\0')
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if (*cp != *fcp)
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break;
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else
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++cp, ++fcp;
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if (*fcp == L'\0' && cp - *format > best_len)
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{
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best_cp = cp;
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best_len = cp - *format;
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best_bit = runp->bit;
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}
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runp = runp->next;
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}
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if (best_bit != 0)
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{
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info->user |= best_bit;
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*format = best_cp;
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return 0;
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}
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return 1;
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}
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int
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attribute_hidden
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__handle_registered_modifier_wc (const unsigned int **format,
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struct printf_info *info)
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{
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struct printf_modifier_record *runp = __printf_modifier_table[**format];
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int best_bit = 0;
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int best_len = 0;
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const unsigned int *best_cp = NULL;
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while (runp != NULL)
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{
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const unsigned int *cp = *format + 1;
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wchar_t *fcp = runp->str;
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while (*cp != '\0' && *fcp != L'\0')
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if (*cp != *fcp)
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break;
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else
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++cp, ++fcp;
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if (*fcp == L'\0' && cp - *format > best_len)
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{
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best_cp = cp;
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best_len = cp - *format;
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best_bit = runp->bit;
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}
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runp = runp->next;
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}
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if (best_bit != 0)
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{
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info->user |= best_bit;
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*format = best_cp;
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return 0;
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}
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return 1;
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}
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libc_freeres_fn (free_mem)
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{
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if (__printf_modifier_table != NULL)
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{
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for (int i = 0; i < UCHAR_MAX; ++i)
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{
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struct printf_modifier_record *runp = __printf_modifier_table[i];
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while (runp != NULL)
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{
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struct printf_modifier_record *oldp = runp;
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runp = runp->next;
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free (oldp);
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}
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}
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free (__printf_modifier_table);
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}
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}
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