xref: /illumos-gate/usr/src/lib/libc/port/stdio/putw.c (revision 02b17e23cf5bf66a5ea787e066ae3d1aa49bd856)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 /*
31  * The intent here is to provide a means to make the order of
32  * bytes in an io-stream correspond to the order of the bytes
33  * in the memory while doing the io a `word' at a time.
34  */
35 
36 #pragma weak _putw = putw
37 
38 #include "lint.h"
39 #include "file64.h"
40 #include "mtlib.h"
41 #include <stdio.h>
42 #include <thread.h>
43 #include <synch.h>
44 #include "stdiom.h"
45 
46 int
47 putw(int w, FILE *stream)
48 {
49 	char *s = (char *)&w;
50 	int i = sizeof (int);
51 	int ret;
52 	rmutex_t *lk;
53 
54 	FLOCKFILE(lk, stream);
55 	while (--i >= 0 && putc_unlocked(*s++, stream) != EOF)
56 		;
57 	ret = stream->_flag & _IOERR;
58 	FUNLOCKFILE(lk);
59 	return (ret);
60 }
61