1 /*
2 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
3 * Copyright (c) 2002-2004 Tim J. Robbins.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 /*
29 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
30 * Use is subject to license terms.
31 */
32
33 #include "lint.h"
34 #include "file64.h"
35 #include "mtlib.h"
36 #include "mse_int.h"
37 #include <errno.h>
38 #include <limits.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <wchar.h>
42 #include <synch.h>
43 #include "mblocal.h"
44 #include "stdiom.h"
45 #include "mse.h"
46
47 #pragma weak _putwc = putwc
48
49 /*
50 * FreeBSD had both a MT safe and non-MT safe version. For whatever reason,
51 * we don't need the non-MT safe version. We do this because its faster,
52 * since we don't have to lock the file while doing the potentially expensive
53 * conversion from wide to mb.
54 *
55 * Solaris also has XPG5 and legacy semantics. The new standard requires
56 * that the stream orientation change, but legacy calls don't do that.
57 *
58 * Note that we had the source for the XPG5 version of this, but it relied
59 * on closed implementation bits that we lack, so we supply replacements
60 * here.
61 */
62 static wint_t
__fputwc_impl(wchar_t wc,FILE * fp,int orient)63 __fputwc_impl(wchar_t wc, FILE *fp, int orient)
64 {
65 char buf[MB_LEN_MAX];
66 size_t i, len;
67 rmutex_t *mx;
68
69 /* If we are given WEOF, then we have to stop */
70 if (wc == WEOF)
71 return (WEOF);
72
73 if (MB_CUR_MAX == 1 && wc > 0 && wc <= UCHAR_MAX) {
74 /*
75 * Assume single-byte locale with no special encoding.
76 */
77 *buf = (unsigned char)wc;
78 len = 1;
79 } else {
80 /*
81 * FreeBSD used restartable wcrtomb. I think we can use
82 * the simpler wctomb form here. We should have a complete
83 * decode.
84 */
85 if ((len = wctomb(buf, wc)) == (size_t)-1) {
86 fp->_flag |= _IOERR;
87 errno = EILSEQ;
88 return (WEOF);
89 }
90 }
91
92 FLOCKFILE(mx, fp);
93 /*
94 * This is used for XPG 5 semantics, which requires the stream
95 * orientation to be changed when the function is called.
96 */
97 if (orient && GET_NO_MODE(fp)) {
98 _setorientation(fp, _WC_MODE);
99 }
100 for (i = 0; i < len; i++) {
101 if (PUTC((unsigned char)buf[i], fp) == EOF) {
102 FUNLOCKFILE(mx);
103 return (WEOF);
104 }
105 }
106 FUNLOCKFILE(mx);
107 return ((wint_t)wc);
108 }
109
110 wint_t
fputwc(wchar_t wc,FILE * fp)111 fputwc(wchar_t wc, FILE *fp)
112 {
113 return (__fputwc_impl(wc, fp, 0));
114 }
115
116 /*
117 * Trivial functional form of the typical macro.
118 */
119 #undef __putwc
120 wint_t
putwc(wchar_t wc,FILE * fp)121 putwc(wchar_t wc, FILE *fp)
122 {
123 return (__fputwc_impl(wc, fp, 0));
124 }
125
126 wint_t
__fputwc_xpg5(wint_t wc,FILE * fp)127 __fputwc_xpg5(wint_t wc, FILE *fp)
128 {
129 return (__fputwc_impl(wc, fp, 1));
130 }
131
132 #undef __putwc_xpg5
133 wint_t
__putwc_xpg5(wint_t wc,FILE * fp)134 __putwc_xpg5(wint_t wc, FILE *fp)
135 {
136 return (__fputwc_impl(wc, fp, 1));
137 }
138