1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
3 .\" This is free documentation; you can redistribute it and/or
4 .\" modify it under the terms of the GNU General Public License as
5 .\" published by the Free Software Foundation; either version 2 of
6 .\" the License, or (at your option) any later version.
8 .\" References consulted:
9 .\" GNU glibc-2 source code and manual
10 .\" Dinkumware C library reference http://www.dinkumware.com/
11 .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
13 .TH WCSNLEN 3 2010-09-15 "GNU" "Linux Programmer's Manual"
15 wcsnlen \- determine the length of a fixed-size wide-character string
20 .BI "size_t wcsnlen(const wchar_t *" s ", size_t " maxlen );
24 Feature Test Macro Requirements for glibc (see
25 .BR feature_test_macros (7)):
34 _XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
44 function is the wide-character equivalent
48 It returns the number of wide-characters in the string pointed to by
49 \fIs\fP, not including the terminating L\(aq\\0\(aq character, but at most
53 looks only at the first \fImaxlen\fP
54 wide-characters at \fIs\fP and never beyond \fIs+maxlen\fP.
58 function returns \fIwcslen(s)\fP, if that is less than
59 \fImaxlen\fP, or \fImaxlen\fP if there is no L\(aq\\0\(aq character among the
60 first \fImaxlen\fP wide characters pointed to by \fIs\fP.
64 function is provided in glibc since version 2.1.
66 This function is a GNU extension.