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, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 /*
28 * wio_put.c
29 *
30 * Wide I/O Library
31 *
32 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
33 *
34 */
35
36 #if M_RCSID
37 #ifndef lint
38 static char rcsID[] = "$Header: /rd/src/libc/wide/rcs/wio_put.c 1.1 1995/07/26 17:51:21 ant Exp $";
39 #endif
40 #endif
41
42 #include <mks.h>
43 #include <errno.h>
44 #include <m_wio.h>
45
46 /*
47 * Return the number of bytes written. Errno will be set for errors.
48 *
49 * The function referenced by "put" is passed a byte value and the
50 * pointer "object", and returns the byte value or EOF if no further
51 * data can be written.
52 */
53 int
m_wio_put(wc,wio)54 m_wio_put(wc, wio)
55 wint_t wc;
56 t_wide_io *wio;
57 {
58 int count, mb_len;
59 unsigned char *ptr;
60
61 if (wio == (t_wide_io *) 0 || wio->put == (int (*)(int, void *)) 0) {
62 errno = EINVAL;
63 return -1;
64 }
65
66 /* Force shift-in state at end-of-file. */
67 if (wc == WEOF)
68 wc = '\0';
69
70 if ((mb_len = wcrtomb((char *) wio->_mb, wc, &wio->_state)) < 0)
71 /* Note errno will have been set by wcrtomb(). */
72 return -1;
73
74 /* When shift-in state has been forced don't write '\0' byte.
75 * The "stream" object is considered to be in "text" mode, in
76 * which case file I/O produces undefined results for systems
77 * using locking-shift character sets.
78 */
79 if (wc == '\0')
80 --mb_len;
81
82 /* Write multibyte character sequence. */
83 for (ptr = wio->_mb, count = 0; count < mb_len; ++ptr, ++count)
84 if ((*wio->put)(*ptr, wio->object) == EOF)
85 break;
86
87 /* Remember just in case some one needs it. */
88 wio->_size = mb_len;
89 wio->_next = count;
90
91 return count;
92 }
93
94