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Diffstat (limited to 'lib/libc/locale/mbtowc.3')
-rw-r--r-- | lib/libc/locale/mbtowc.3 | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/lib/libc/locale/mbtowc.3 b/lib/libc/locale/mbtowc.3 new file mode 100644 index 0000000..b59dbf4 --- /dev/null +++ b/lib/libc/locale/mbtowc.3 @@ -0,0 +1,114 @@ +.\" Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. +.\" Copyright (c) 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Donn Seeley of BSDI. +.\" +.\" 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. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. +.\" +.\" From @(#)multibyte.3 8.1 (Berkeley) 6/4/93 +.\" From FreeBSD: src/lib/libc/locale/multibyte.3,v 1.22 2003/11/08 03:23:11 tjr Exp +.\" $FreeBSD$ +.\" +.Dd April 11, 2004 +.Dt MBTOWC 3 +.Os +.Sh NAME +.Nm mbtowc +.Nd convert a character to a wide-character code +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In stdlib.h +.Ft int +.Fo mbtowc +.Fa "wchar_t * restrict wcharp" "const char * restrict mbchar" +.Fa "size_t nbytes" +.Fc +.Sh DESCRIPTION +The +.Fn mbtowc +function converts a multibyte character +.Fa mbchar +into a wide character according to the current conversion state, +and stores the result +in the object pointed to by +.Fa wcharp . +Up to +.Fa nbytes +bytes are examined. +.Pp +A call with a null +.Fa mbchar +pointer returns nonzero if the current encoding requires shift states, +zero otherwise; +if shift states are required, the shift state is reset to the initial state. +.Sh RETURN VALUES +If +.Fa mbchar +is +.Dv NULL , +the +.Fn mbtowc +function returns nonzero if shift states are supported, +zero otherwise. +.Pp +Otherwise, if +.Fa mbchar +is not a null pointer, +.Fn mbtowc +either returns 0 if +.Fa mbchar +represents the null wide character, or returns +the number of bytes processed in +.Fa mbchar , +or returns \-1 if no multibyte character +could be recognized or converted. +In this case, +.Fn mbtowc Ns 's +internal conversion state is undefined. +.Sh ERRORS +The +.Fn mbtowc +function will fail if: +.Bl -tag -width Er +.It Bq Er EILSEQ +An invalid multibyte sequence was detected. +.It Bq Er EINVAL +The internal conversion state is invalid. +.El +.Sh SEE ALSO +.Xr btowc 3 , +.Xr mblen 3 , +.Xr mbrtowc 3 , +.Xr mbstowcs 3 , +.Xr multibyte 3 , +.Xr wctomb 3 +.Sh STANDARDS +The +.Fn mbtowc +function conforms to +.St -isoC-99 . |