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author | tjr <tjr@FreeBSD.org> | 2002-08-18 06:30:10 +0000 |
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committer | tjr <tjr@FreeBSD.org> | 2002-08-18 06:30:10 +0000 |
commit | a87152b56061e8a50c4a1aa30087ab5414747caa (patch) | |
tree | b0db833aa303e27ab11b105a22ad20569ca28d93 /lib/libc/locale/mbrlen.3 | |
parent | 6cf27f3105308a52d2373d09af8a7a599cfd68c2 (diff) | |
download | FreeBSD-src-a87152b56061e8a50c4a1aa30087ab5414747caa.zip FreeBSD-src-a87152b56061e8a50c4a1aa30087ab5414747caa.tar.gz |
Implement the ISO C90 Amd.1 restartable wide and multibyte character
manipulation functions mbrlen(), mbrtowc(), mbsinit(), mbsrtowcs(),
wcrtomb(), wcsrtombs().
Diffstat (limited to 'lib/libc/locale/mbrlen.3')
-rw-r--r-- | lib/libc/locale/mbrlen.3 | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/lib/libc/locale/mbrlen.3 b/lib/libc/locale/mbrlen.3 new file mode 100644 index 0000000..0fcc227 --- /dev/null +++ b/lib/libc/locale/mbrlen.3 @@ -0,0 +1,113 @@ +.\" Copyright (c) 2002 Tim J. Robbins +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.Dd August 16, 2002 +.Dt MBRLEN 3 +.Os +.Sh NAME +.Nm mbrlen +.Nd "get number of bytes in a character (restartable)" +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In wchar.h +.Ft size_t +.Fn mbrlen "const char *restrict s" "size_t n" "mbstate_t *restrict ps" +.Sh DESCRIPTION +The +.Fn mbrlen +function determines the the number of bytes constituting the +multibyte character sequence pointer to by +.Fa s . +.Pp +It is equivalent to: +.Pp +.Dl "mbrtowc(NULL, s, n, ps);" +.Pp +Except that when +.Fa ps +is a NULL pointer, +.Fn mbrlen +uses its own static, internal +.Ft mbstate_t +object to keep track of shift state. +.Sh RETURN VALUES +The +.Fn mbrlen +functions returns: +.Bl -tag -width indent +.It 0 +The first +.Fa n +or fewer bytes of +.Fa s +represent the null wide character (L'\e0'). +.It >0 +The first +.Fa n +or fewer bytes of +.Fa s +represent a valid character, +.Fn mbrtowc +returns the length (in bytes) of the multibyte sequence. +.It Xo +.No ( Ns +.Ft size_t Ns +.No ) Ns \&-2 +.Xc +The first +.Fa n +bytes of +.Fa s +are an incomplete multibyte sequence. +.It Xo +.No ( Ns +.Ft size_t Ns +.No ) Ns \&-1 +.Xc +The byte sequence pointed to by +.Fa s +is an invalid multibyte sequence. +.El +.Sh ERRORS +The +.Fn mbrlen +function will fail if: +.Bl -tag -width Er +.\".It Bq Er EINVAL +.\"Invalid argument. +.It Bq Er EILSEQ +An invalid multibyte sequence was detected. +.El +.Sh SEE ALSO +.Xr mblen 3 , +.Xr mbrtowc 3 +.Sh STANDARDS +The +.Fn mbrlen +function conforms to +.St -isoC-99 . +.Sh BUGS +The current implementation does not support shift states. |