f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
134 lines
4.1 KiB
Groff
134 lines
4.1 KiB
Groff
.\" $NetBSD: wcstombs.3,v 1.13 2011/03/16 09:32:12 mbalmer Exp $
|
|
.\"
|
|
.\" Copyright (c)2002 Citrus Project,
|
|
.\" 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.
|
|
.\"
|
|
.Dd March 16, 2011
|
|
.Dt WCSTOMBS 3
|
|
.Os
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh NAME
|
|
.Nm wcstombs
|
|
.Nd converts a wide-character string to a multibyte character string
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh SYNOPSIS
|
|
.In stdlib.h
|
|
.Ft size_t
|
|
.Fn wcstombs "char * restrict s" "const wchar_t * restrict pwcs" "size_t n"
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh DESCRIPTION
|
|
.Fn wcstombs
|
|
converts the nul-terminated wide-character string pointed to by
|
|
.Fa pwcs
|
|
to the corresponding multibyte character string,
|
|
and stores it in the array pointed to by
|
|
.Fa s .
|
|
This function may modify the first at most
|
|
.Fa n
|
|
bytes of the array pointed to by
|
|
.Fa s .
|
|
Each character will be converted as if
|
|
.Xr wctomb 3
|
|
is continuously called, except the internal state of
|
|
.Xr wctomb 3
|
|
will not be affected.
|
|
.Pp
|
|
For state-dependent encoding, the
|
|
.Fn wcstombs
|
|
implies the result multibyte character string pointed to by
|
|
.Fa s
|
|
always to begin with an initial state.
|
|
.Pp
|
|
The behaviour of
|
|
.Fn wcstombs
|
|
is affected by the
|
|
.Dv LC_CTYPE
|
|
category of the current locale.
|
|
.Pp
|
|
These are the special cases:
|
|
.Bl -tag -width 012345678901
|
|
.It s == NULL
|
|
The
|
|
.Fn wcstombs
|
|
returns the number of bytes to store the whole multibyte character string
|
|
corresponding to the wide-character string pointed to by
|
|
.Fa pwcs .
|
|
In this case,
|
|
.Fa n
|
|
is ignored.
|
|
.It pwcs == NULL
|
|
Undefined (may cause the program to crash).
|
|
.El
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh RETURN VALUES
|
|
.Fn wcstombs
|
|
returns:
|
|
.Bl -tag -width 012345678901
|
|
.It 0 or positive
|
|
Number of bytes stored in the array pointed to by
|
|
.Fa s .
|
|
There are no cases that the value returned is greater than
|
|
.Fa n
|
|
(unless
|
|
.Fa s
|
|
is a null pointer).
|
|
If the return value is equal to
|
|
.Fa n ,
|
|
the string pointed to by
|
|
.Fa s
|
|
will not be nul-terminated.
|
|
.It (size_t)-1
|
|
.Fa pwcs
|
|
points to a string containing an invalid wide character.
|
|
.Fn wcstombs
|
|
also sets
|
|
.Va errno
|
|
to indicate the error.
|
|
.El
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh ERRORS
|
|
.Fn wcstombs
|
|
may cause an error in the following case:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EILSEQ
|
|
.Fa pwcs
|
|
points to a string containing an invalid wide character.
|
|
.El
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh SEE ALSO
|
|
.Xr mbstowcs 3 ,
|
|
.Xr setlocale 3 ,
|
|
.Xr wctomb 3
|
|
.\" ----------------------------------------------------------------------
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn wcstombs
|
|
function conforms to
|
|
.St -ansiC .
|
|
The restrict qualifier is added at
|
|
.St -isoC-99 .
|