]>
Commit | Line | Data |
---|---|---|
1 | .\" Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. | |
2 | .\" Copyright (c) 1993 | |
3 | .\" The Regents of the University of California. All rights reserved. | |
4 | .\" | |
5 | .\" This code is derived from software contributed to Berkeley by | |
6 | .\" Donn Seeley of BSDI. | |
7 | .\" | |
8 | .\" Redistribution and use in source and binary forms, with or without | |
9 | .\" modification, are permitted provided that the following conditions | |
10 | .\" are met: | |
11 | .\" 1. Redistributions of source code must retain the above copyright | |
12 | .\" notice, this list of conditions and the following disclaimer. | |
13 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
14 | .\" notice, this list of conditions and the following disclaimer in the | |
15 | .\" documentation and/or other materials provided with the distribution. | |
16 | .\" 3. All advertising materials mentioning features or use of this software | |
17 | .\" must display the following acknowledgement: | |
18 | .\" This product includes software developed by the University of | |
19 | .\" California, Berkeley and its contributors. | |
20 | .\" 4. Neither the name of the University nor the names of its contributors | |
21 | .\" may be used to endorse or promote products derived from this software | |
22 | .\" without specific prior written permission. | |
23 | .\" | |
24 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | .\" SUCH DAMAGE. | |
35 | .\" | |
36 | .\" From @(#)multibyte.3 8.1 (Berkeley) 6/4/93 | |
37 | .\" From FreeBSD: src/lib/libc/locale/multibyte.3,v 1.22 2003/11/08 03:23:11 tjr Exp | |
38 | .\" $FreeBSD: src/lib/libc/locale/mbtowc.3,v 1.4 2004/07/05 06:36:36 ru Exp $ | |
39 | .\" | |
40 | .Dd April 11, 2004 | |
41 | .Dt MBTOWC 3 | |
42 | .Os | |
43 | .Sh NAME | |
44 | .Nm mbtowc , | |
45 | .Nm mbtowc_l | |
46 | .Nd convert a character to a wide-character code | |
47 | .Sh LIBRARY | |
48 | .Lb libc | |
49 | .Sh SYNOPSIS | |
50 | .In stdlib.h | |
51 | .Ft int | |
52 | .Fo mbtowc | |
53 | .Fa "wchar_t *restrict pwc" | |
54 | .Fa "const char *restrict s" | |
55 | .Fa "size_t n" | |
56 | .Fc | |
57 | .In stdlib.h | |
58 | .In xlocale.h | |
59 | .Ft int | |
60 | .Fo mbtowc_l | |
61 | .Fa "wchar_t *restrict pwc" | |
62 | .Fa "const char *restrict s" | |
63 | .Fa "size_t n" | |
64 | .Fa "locale_t loc" | |
65 | .Fc | |
66 | .Sh DESCRIPTION | |
67 | The | |
68 | .Fn mbtowc | |
69 | function converts a multibyte character | |
70 | .Fa s | |
71 | into a wide character, according to the current conversion state, | |
72 | and stores the result | |
73 | in the object pointed to by | |
74 | .Fa pwc . | |
75 | Up to | |
76 | .Fa n | |
77 | bytes are examined. | |
78 | .Pp | |
79 | A call with a null | |
80 | .Fa s | |
81 | pointer returns nonzero if the current encoding requires shift states, | |
82 | zero otherwise; | |
83 | if shift states are required, the shift state is reset to the initial state. | |
84 | .Pp | |
85 | While the | |
86 | .Fn mbtowc | |
87 | function uses the current locale, the | |
88 | .Fn mbtowc_l | |
89 | function may be passed a locale directly. See | |
90 | .Xr xlocale 3 | |
91 | for more information. | |
92 | .Sh RETURN VALUES | |
93 | If | |
94 | .Fa s | |
95 | is | |
96 | .Dv NULL , | |
97 | the | |
98 | .Fn mbtowc | |
99 | function returns nonzero if shift states are supported, | |
100 | zero otherwise. | |
101 | .Pp | |
102 | Otherwise, if | |
103 | .Fa s | |
104 | is not a null pointer, | |
105 | .Fn mbtowc | |
106 | either returns 0 if | |
107 | .Fa s | |
108 | represents the null wide character, or returns | |
109 | the number of bytes processed in | |
110 | .Fa s , | |
111 | or returns \-1 if no multibyte character | |
112 | could be recognized or converted. | |
113 | In this case, | |
114 | .Fn mbtowc Ns 's | |
115 | internal conversion state is undefined. | |
116 | .Sh ERRORS | |
117 | The | |
118 | .Fn mbtowc | |
119 | function will fail if: | |
120 | .Bl -tag -width Er | |
121 | .It Bq Er EILSEQ | |
122 | An invalid multibyte sequence was detected. | |
123 | .It Bq Er EINVAL | |
124 | The internal conversion state is invalid. | |
125 | .El | |
126 | .Sh SEE ALSO | |
127 | .Xr btowc 3 , | |
128 | .Xr mblen 3 , | |
129 | .Xr mbrtowc 3 , | |
130 | .Xr mbstowcs 3 , | |
131 | .Xr multibyte 3 , | |
132 | .Xr wctomb 3 , | |
133 | .Xr xlocale 3 | |
134 | .Sh STANDARDS | |
135 | The | |
136 | .Fn mbtowc | |
137 | function conforms to | |
138 | .St -isoC-99 . |