1 '\" te
2 .\" Copyright (c) 1992, X/Open Company Limited. All Rights Reserved. Portions Copyright (c) 2003, Sun Microsystems, Inc. All Rights Reserved.
3 .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
4 .\" http://www.opengroup.org/bookstore/.
5 .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
6 .\" This notice shall appear on any product containing this material.
7 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
8 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
9 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
10 .TH MBRLEN 3C "Nov 1, 2003"
11 .SH NAME
12 mbrlen \- get number of bytes in a character (restartable)
13 .SH SYNOPSIS
14 .LP
15 .nf
16 #include <wchar.h>
17
18 \fBsize_t\fR \fBmbrlen\fR(\fBconst char *restrict\fR \fIs\fR, \fBsize_t\fR \fIn\fR, \fBmbstate_t *restrict\fR \fIps\fR);
19 .fi
20
21 .SH DESCRIPTION
22 .sp
23 .LP
24 If \fIs\fR is not a null pointer, \fBmbrlen()\fR determines the number of
25 bytes constituting the character pointed to by \fIs\fR. It is equivalent to:
26 .sp
27 .in +2
28 .nf
29 mbstate_t internal;
30 mbrtowc(NULL, s, n, ps != NULL ? ps : &internal);
31 .fi
32 .in -2
33
34 .sp
35 .LP
36 If \fIps\fR is a null pointer, the \fBmbrlen()\fR function uses its own
37 internal \fBmbstate_t\fR object, which is initialized at program startup to the
38 initial conversion state. Otherwise, the \fBmbstate_t\fR object pointed to
39 by \fIps\fR is used to completely describe the current conversion state of the
40 associated character sequence. Solaris will behave as if no function defined in
41 the Solaris Reference Manual calls \fBmbrlen()\fR.
42 .sp
43 .LP
44 The behavior of this function is affected by the \fBLC_CTYPE\fR category of the
45 current locale. See \fBenviron\fR(5).
46 .SH RETURN VALUES
47 .sp
48 .LP
49 The \fBmbrlen()\fR function returns the first of the following that applies:
50 .sp
51 .ne 2
52 .na
53 \fB\fB0\fR\fR
54 .ad
55 .RS 17n
56 If the next \fIn\fR or fewer bytes complete the character that corresponds to
57 the null wide-character.
58 .RE
59
60 .sp
61 .ne 2
62 .na
63 \fB\fBpositive\fR\fR
64 .ad
65 .RS 17n
66 If the next \fIn\fR or fewer bytes complete a valid character; the value
67 returned is the number of bytes that complete the character.
68 .RE
69
75 .RS 17n
76 If the next \fIn\fR bytes contribute to an incomplete but potentially valid
77 character, and all \fIn\fR bytes have been processed. When \fIn\fR has at least
78 the value of the \fBMB_CUR_MAX\fR macro, this case can only occur if \fIs\fR
79 points at a sequence of redundant shift sequences (for implementations with
80 state-dependent encodings).
81 .RE
82
83 .sp
84 .ne 2
85 .na
86 \fB\fB(size_t)\(mi1\fR\fR
87 .ad
88 .RS 17n
89 If an encoding error occurs, in which case the next \fIn\fR or fewer bytes do
90 not contribute to a complete and valid character. In this case, \fBEILSEQ\fR
91 is stored in \fBerrno\fR and the conversion state is undefined.
92 .RE
93
94 .SH ERRORS
95 .sp
96 .LP
97 The \fBmbrlen()\fR function may fail if:
98 .sp
99 .ne 2
100 .na
101 \fB\fBEINVAL\fR\fR
102 .ad
103 .RS 10n
104 The \fIps\fR argument points to an object that contains an invalid conversion
105 state.
106 .RE
107
108 .sp
109 .ne 2
110 .na
111 \fB\fBEILSEQ\fR\fR
112 .ad
113 .RS 10n
114 Invalid character sequence is detected.
115 .RE
116
117 .SH ATTRIBUTES
118 .sp
119 .LP
120 See \fBattributes\fR(5) for descriptions of the following attributes:
121 .sp
122
123 .sp
124 .TS
125 box;
126 c | c
127 l | l .
128 ATTRIBUTE TYPE ATTRIBUTE VALUE
129 _
130 Interface Stability Standard
131 _
132 MT-Level See NOTES below
133 .TE
134
135 .SH SEE ALSO
136 .sp
137 .LP
138 \fBmbrtowc\fR(3C), \fBmbsinit\fR(3C), \fBsetlocale\fR(3C), \fBattributes\fR(5),
139 \fBenviron\fR(5), \fBstandards\fR(5)
140 .SH NOTES
141 .sp
142 .LP
143 If \fIps\fR is not a null pointer, \fBmbrlen()\fR uses the \fBmbstate_t\fR
144 object pointed to by \fIps\fR and the function can be used safely in
145 multithreaded applications, as long as \fBsetlocale\fR(3C) is not being called
146 to change the locale. If \fIps\fR is a null pointer, \fBmbrlen()\fR uses its
147 internal \fBmbstate_t\fR object and the function is Unsafe in multithreaded
148 applications.
|
1 '\" te
2 .\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
3 .\" Copyright (c) 1992, X/Open Company Limited. All Rights Reserved. Portions Copyright (c) 2003, Sun Microsystems, Inc. All Rights Reserved.
4 .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
5 .\" http://www.opengroup.org/bookstore/.
6 .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
7 .\" This notice shall appear on any product containing this material.
8 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
9 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
10 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
11 .TH MBRLEN 3C "Jun 21, 2014"
12 .SH NAME
13 mbrlen, mbrlen_l \- get number of bytes in a character (restartable)
14 .SH SYNOPSIS
15 .LP
16 .nf
17 #include <wchar.h>
18
19 \fBsize_t\fR \fBmbrlen\fR(\fBconst char *restrict\fR \fIs\fR, \fBsize_t\fR \fIn\fR, \fBmbstate_t *restrict\fR \fIps\fR);
20 .fi
21 .LP
22 .nf
23 #include <wchar.h>
24 #include <xlocale.h>
25
26 \fBsize_t\fR \fBmbrlen_l\fR(\fBconst char *restrict\fR \fIs\fR, \fBsize_t\fR \fIn\fR, \fBmbstate_t *restrict\fR \fIps\fR,
27 \fBlocale_t\fR \fIloc\fR);
28 .fi
29 .SH DESCRIPTION
30 .LP
31 If \fIs\fR is not a null pointer, \fBmbrlen()\fR and \fBmbrlen_l()\fR determine
32 the number of bytes constituting the character pointed to by \fIs\fR.
33 The call
34 .nf
35 .IP
36 \fBmbrlen\fR(\fIs\fR, \fIn\fR, \fIps\fR);
37 .fi
38 .LP
39 is equivalent to:
40 .nf
41 .IP
42 mbstate_t internal;
43 \fBmbrtowc\fR(NULL, \fIs\fR, \fIn\fR, \fIps\fR != NULL ? \fIps\fR : &internal);
44 .fi
45 .LP
46 If \fIps\fR is a null pointer, the \fBmbrlen()\fR and \fBmbrlen_l()\fR
47 functions use their own
48 internal \fBmbstate_t\fR object, which is initialized at program startup to the
49 initial conversion state. Otherwise, the \fBmbstate_t\fR object pointed to
50 by \fIps\fR is used to completely describe the current conversion state of the
51 associated character sequence. The implemenation will behave as if no function
52 defined in the Reference Manual calls \fBmbrlen()\fR.
53 .LP
54 The behavior of \fBmbrlen()\fR is affected by the \fBLC_CTYPE\fR category of the
55 current locale. See \fBenviron\fR(5). The behavior of \fBmbrlen_l()\fR does not
56 use the current enivronment and instead uses the locale specified by \fBloc\fR.
57 .SH RETURN VALUES
58 .LP
59 The \fBmbrlen()\fR and \fBmbrlen_l()\fR functions return the first of the
60 following that applies:
61 .sp
62 .ne 2
63 .na
64 \fB\fB0\fR\fR
65 .ad
66 .RS 17n
67 If the next \fIn\fR or fewer bytes complete the character that corresponds to
68 the null wide-character.
69 .RE
70
71 .sp
72 .ne 2
73 .na
74 \fB\fBpositive\fR\fR
75 .ad
76 .RS 17n
77 If the next \fIn\fR or fewer bytes complete a valid character; the value
78 returned is the number of bytes that complete the character.
79 .RE
80
86 .RS 17n
87 If the next \fIn\fR bytes contribute to an incomplete but potentially valid
88 character, and all \fIn\fR bytes have been processed. When \fIn\fR has at least
89 the value of the \fBMB_CUR_MAX\fR macro, this case can only occur if \fIs\fR
90 points at a sequence of redundant shift sequences (for implementations with
91 state-dependent encodings).
92 .RE
93
94 .sp
95 .ne 2
96 .na
97 \fB\fB(size_t)\(mi1\fR\fR
98 .ad
99 .RS 17n
100 If an encoding error occurs, in which case the next \fIn\fR or fewer bytes do
101 not contribute to a complete and valid character. In this case, \fBEILSEQ\fR
102 is stored in \fBerrno\fR and the conversion state is undefined.
103 .RE
104
105 .SH ERRORS
106 .LP
107 The \fBmbrlen()\fR and \fBmbrlen_l()\fR functions may fail if:
108 .sp
109 .ne 2
110 .na
111 \fB\fBEINVAL\fR\fR
112 .ad
113 .RS 10n
114 The \fIps\fR argument points to an object that contains an invalid conversion
115 state.
116 .RE
117
118 .sp
119 .ne 2
120 .na
121 \fB\fBEILSEQ\fR\fR
122 .ad
123 .RS 10n
124 Invalid character sequence is detected.
125 .RE
126
127 .SH ATTRIBUTES
128 .LP
129 See \fBattributes\fR(5) for descriptions of the following attributes:
130 .TS
131 box;
132 c | c
133 l | l .
134 ATTRIBUTE TYPE ATTRIBUTE VALUE
135 _
136 Interface Stability See below.
137 _
138 MT-Level MT-Safe
139 .TE
140
141 .LP
142 The
143 .B mbrlen()
144 function is Standard. The
145 .B mbrlen_l()
146 function is Uncommitted.
147 .SH SEE ALSO
148 .LP
149 \fBmbrtowc\fR(3C), \fBmbsinit\fR(3C), \fBnewlocale\fR(3C),
150 \fBsetlocale\fR(3C), \fBattributes\fR(5),
151 \fBenviron\fR(5), \fBstandards\fR(5)
152 .SH NOTES
153 .sp
154 .LP
155 If \fIps\fR is not a null pointer, \fBmbrlen()\fR uses the \fBmbstate_t\fR
156 object pointed to by \fIps\fR and the function can be used safely in
157 multithreaded applications, as long as \fBsetlocale\fR(3C) is not being called
158 to change the locale or a per-thread locale has been installed on the calling
159 thread with \fBuselocale\fR(3C). If \fIps\fR is a null pointer, \fBmbrlen()\fR
160 uses its internal \fBmbstate_t\fR object and the function is Unsafe in
161 multithreaded applications.
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