1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
3 .\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
4 .\" This is free documentation; you can redistribute it and/or
5 .\" modify it under the terms of the GNU General Public License as
6 .\" published by the Free Software Foundation; either version 2 of
7 .\" the License, or (at your option) any later version.
10 .\" References consulted:
11 .\" GNU glibc-2 source code and manual
12 .\" Dinkumware C library reference http://www.dinkumware.com/
13 .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
16 .TH MBLEN 3 1999-07-25 "GNU" "Linux Programmer's Manual"
18 mblen \- determine number of bytes in next multibyte character
21 .B #include <stdlib.h>
23 .BI "int mblen(const char *" s ", size_t " n );
26 If \fIs\fP is not a NULL pointer, the
28 function inspects at most
29 \fIn\fP bytes of the multibyte string starting at \fIs\fP and extracts the
30 next complete multibyte character.
31 It uses a static anonymous shift state only
35 If the multibyte character is not the null wide
36 character, it returns the number of bytes that were consumed from \fIs\fP.
37 If the multibyte character is the null wide character, it returns 0.
39 If the \fIn\fP bytes starting at \fIs\fP do not contain a complete multibyte
43 This can happen even if
44 \fIn\fP is greater than or equal to \fIMB_CUR_MAX\fP,
45 if the multibyte string contains redundant shift sequences.
47 If the multibyte string starting at \fIs\fP contains an invalid multibyte
48 sequence before the next complete character,
52 If \fIs\fP is a NULL pointer, the
55 .\" The Dinkumware doc and the Single UNIX specification say this, but
56 .\" glibc doesn't implement this.
57 resets the shift state, only known to this function, to the initial state, and
58 returns nonzero if the encoding has nontrivial shift state, or zero if the
59 encoding is stateless.
63 function returns the number of
64 bytes parsed from the multibyte
65 sequence starting at \fIs\fP, if a non-null wide character was recognized.
66 It returns 0, if a null wide character was recognized.
68 invalid multibyte sequence was encountered or if it couldn't parse a complete
82 provides a better interface to the same