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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 1996-1998 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 /* LINTLIBRARY */
28
29 /*
30 * wio_put.c
31 *
32 * Wide I/O Library
33 *
34 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
35 *
36 */
37
38 #if M_RCSID
39 #ifndef lint
40 static char rcsID[] = "$Header: /rd/src/libc/wide/rcs/wio_put.c 1.1 "
41 "1995/07/26 17:51:21 ant Exp $";
42 #endif
43 #endif
44
45 #include <mks.h>
46 #include <errno.h>
47 #include <m_wio.h>
48
49 /*
50 * Return the number of bytes written. Errno will be set for errors.
51 *
52 * The function referenced by "put" is passed a byte value and the
53 * pointer "object", and returns the byte value or EOF if no further
54 * data can be written.
55 */
56 int
m_wio_put(wint_t wc,t_wide_io * wio)57 m_wio_put(wint_t wc, t_wide_io *wio)
58 {
59 int count, mb_len;
60 unsigned char *ptr;
61
62 if (wio == NULL || wio->put == (int (*)(int, void *)) NULL) {
63 errno = EINVAL;
64 return (-1);
65 }
66
67 /* Force shift-in state at end-of-file. */
68 if (wc == WEOF)
69 wc = L'\0';
70
71 if ((mb_len = wctomb((char *) wio->_mb, wc)) < 0)
72 /* Note errno will have been set by wcrtomb(). */
73 return (-1);
74
75 /*
76 * When shift-in state has been forced don't write '\0' byte.
77 * The "stream" object is considered to be in "text" mode, in
78 * which case file I/O produces undefined results for systems
79 * using locking-shift character sets.
80 */
81 if (wc == '\0')
82 --mb_len;
83
84 /* Write multibyte character sequence. */
85 for (ptr = wio->_mb, count = 0; count < mb_len; ++ptr, ++count)
86 if ((*wio->put)(*ptr, wio->object) == EOF)
87 break;
88
89 /* Remember just in case some one needs it. */
90 wio->_size = mb_len;
91 wio->_next = count;
92
93 return (count);
94 }
95