1/*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: src/lib/libc/stdio/ungetwc.c,v 1.11 2008/04/17 22:17:54 jhb Exp $"); 29 30#include "xlocale_private.h" 31 32#include "namespace.h" 33#include <errno.h> 34#include <limits.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <wchar.h> 38#include "un-namespace.h" 39#include "libc_private.h" 40#include "local.h" 41#include "mblocal.h" 42 43/* 44 * Non-MT-safe version. 45 */ 46wint_t 47__ungetwc(wint_t wc, FILE *fp, locale_t loc) 48{ 49 char buf[MB_LEN_MAX]; 50 size_t len; 51 52 if (wc == WEOF) 53 return (WEOF); 54 if ((len = loc->__lc_ctype->__wcrtomb(buf, wc, &fp->_mbstate, loc)) == (size_t)-1) { 55 fp->_flags |= __SERR; 56 return (WEOF); 57 } 58 while (len-- != 0) 59 if (__ungetc((unsigned char)buf[len], fp) == EOF) 60 return (WEOF); 61 62 return (wc); 63} 64 65/* 66 * MT-safe version. 67 */ 68wint_t 69ungetwc(wint_t wc, FILE *fp) 70{ 71 wint_t r; 72 73 FLOCKFILE(fp); 74 ORIENT(fp, 1); 75 r = __ungetwc(wc, fp, __current_locale()); 76 FUNLOCKFILE(fp); 77 78 return (r); 79} 80 81wint_t 82ungetwc_l(wint_t wc, FILE *fp, locale_t loc) 83{ 84 wint_t r; 85 86 NORMALIZE_LOCALE(loc); 87 FLOCKFILE(fp); 88 ORIENT(fp, 1); 89 r = __ungetwc(wc, fp, loc); 90 FUNLOCKFILE(fp); 91 92 return (r); 93} 94