fputwc.c revision 129583 
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: head/lib/libc/stdio/fputwc.c 129583 2004-05-22 15:19:41Z tjr $");
29
30#include "namespace.h"
31#include <errno.h>
32#include <limits.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <wchar.h>
36#include "un-namespace.h"
37#include "libc_private.h"
38#include "local.h"
39
40/*
41 * Non-MT-safe version.
42 */
43wint_t
44__fputwc(wchar_t wc, FILE *fp)
45{
46	char buf[MB_LEN_MAX];
47	size_t i, len;
48
49	if (MB_CUR_MAX == 1 && wc > 0 && wc <= UCHAR_MAX) {
50		/*
51		 * Assume single-byte locale with no special encoding.
52		 * A more careful test would be to check
53		 * _CurrentRuneLocale->encoding.
54		 */
55		*buf = (unsigned char)wc;
56		len = 1;
57	} else {
58		if ((len = wcrtomb(buf, wc, &fp->_extra->mbstate)) ==
59		    (size_t)-1) {
60			fp->_flags |= __SERR;
61			return (WEOF);
62		}
63	}
64
65	for (i = 0; i < len; i++)
66		if (__sputc((unsigned char)buf[i], fp) == EOF)
67			return (WEOF);
68
69	return ((wint_t)wc);
70}
71
72/*
73 * MT-safe version.
74 */
75wint_t
76fputwc(wchar_t wc, FILE *fp)
77{
78	wint_t r;
79
80	FLOCKFILE(fp);
81	ORIENT(fp, 1);
82	r = __fputwc(wc, fp);
83	FUNLOCKFILE(fp);
84
85	return (r);
86}
87