2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
176 lines
5 KiB
Groff
176 lines
5 KiB
Groff
.\" $NetBSD: wcsrtombs.3,v 1.13 2010/12/16 17:42:27 wiz Exp $
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.\"
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.\" Copyright (c)2002 Citrus Project,
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd August 8, 2006
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.Dt WCSRTOMBS 3
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.Os
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.\" ----------------------------------------------------------------------
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.Sh NAME
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.Nm wcsrtombs
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.Nd converts a wide-character string to a multibyte character string \
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(restartable)
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.\" ----------------------------------------------------------------------
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.Sh LIBRARY
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.Lb libc
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.\" ----------------------------------------------------------------------
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.Sh SYNOPSIS
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.In wchar.h
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.Ft size_t
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.Fn wcsrtombs "char * restrict s" "const wchar_t ** restrict pwcs" \
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"size_t n" "mbstate_t * restrict ps"
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.\" ----------------------------------------------------------------------
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.Sh DESCRIPTION
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The
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.Fn wcsrtombs
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converts the nul-terminated wide-character string indirectly pointed
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to by
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.Fa pwcs
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to the corresponding multibyte character string,
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and stores it in the array pointed to by
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.Fa s .
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The conversion stops due to the following reasons:
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.Bl -bullet
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.It
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The conversion reaches a nul wide character.
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In this case, the nul wide character is also converted.
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.It
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The
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.Fn wcsrtombs
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has already stored
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.Fa n
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bytes in the array pointed to by
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.Fa s .
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.It
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The conversion encounters an invalid character.
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.El
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.Pp
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Each character will be converted as if
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.Xr wcrtomb 3
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is continuously called, except the internal state of
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.Xr wcrtomb 3
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will not be affected.
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.Pp
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After conversion,
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if
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.Fa s
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is not a null pointer, the pointer object pointed to by
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.Fa pwcs
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is a null pointer (if the conversion is stopped due to reaching a
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nul wide character) or the first byte of the character just after
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the last character converted.
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.Pp
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If
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.Fa s
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is not a null pointer and the conversion is stopped due to reaching
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a nul wide character,
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.Fn wcsrtombs
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places the state object pointed to by
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.Fa ps
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to an initial state after the conversion is taken place.
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.Pp
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The behaviour of
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.Fn wcsrtombs
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is affected by the
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.Dv LC_CTYPE
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category of the current locale.
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.Pp
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These are the special cases:
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.Bl -tag -width 012345678901
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.It "s == NULL"
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.Fn wcsrtombs
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returns the number of bytes to store the whole multibyte character string
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corresponding to the wide-character string pointed to by
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.Fa pwcs ,
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not including the terminating nul byte.
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In this case,
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.Fa n
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is ignored.
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.It "pwcs == NULL || *pwcs == NULL"
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Undefined (may cause the program to crash).
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.It "ps == NULL"
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.Fn wcsrtombs
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uses its own internal state object to keep the conversion state,
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instead of
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.Fa ps
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mentioned in this manual page.
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.Pp
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Calling any other functions in
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.Lb libc
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never changes the internal
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state of
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.Fn wcsrtombs ,
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which is initialized at startup time of the program.
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.El
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.\" ----------------------------------------------------------------------
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.Sh RETURN VALUES
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.Fn wcsrtombs
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returns:
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.Bl -tag -width 012345678901
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.It 0 or positive
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Number of bytes stored in the array pointed to by
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.Fa s ,
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except for a nul byte.
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There are no cases that the value returned is greater than
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.Fa n
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(unless
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.Fa s
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is a null pointer).
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If the return value is equal to
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.Fa n ,
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the string pointed to by
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.Fa s
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will not be nul-terminated.
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.It (size_t)-1
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.Fa pwcs
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points to a string containing an invalid wide character.
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The
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.Fn wcsrtombs
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also sets
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.Va errno
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to indicate the error.
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.El
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.\" ----------------------------------------------------------------------
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.Sh ERRORS
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.Fn wcsrtombs
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may cause an error in the following case:
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.Bl -tag -width Er
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.It Bq Er EILSEQ
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.Fa pwcs
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points to a string containing an invalid wide character.
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.El
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.\" ----------------------------------------------------------------------
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.Sh SEE ALSO
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.Xr setlocale 3 ,
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.Xr wcrtomb 3 ,
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.Xr wcstombs 3
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.\" ----------------------------------------------------------------------
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.Sh STANDARDS
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The
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.Fn wcsrtombs
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function conforms to
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.St -ansiC .
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The restrict qualifier is added at
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.St -isoC-99 .
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