e92a3d83fc
manipulation functions mbrlen(), mbrtowc(), mbsinit(), mbsrtowcs(), wcrtomb(), wcsrtombs().
109 lines
2.9 KiB
Groff
109 lines
2.9 KiB
Groff
.\" Copyright (c) [year] [your name]
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.\" All rights reserved.
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.\" notice, this list of conditions and the following disclaimer in the
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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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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd August 16, 2002
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.Dt WCSRTOMBS 3
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.Os
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.Sh NAME
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.Nm wcsrtombs
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.Nd "convert a wide-character string to a character string (restartable)"
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.Sh LIBRARY
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.Lb libc
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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 dst" "const wchar_t **restrict src" "size_t len" "mbstate_t *restrict ps"
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.Sh DESCRIPTION
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The
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.Fn wcsrtombs
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function converts a string of wide characters indirectly pointed to by
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.Fa src
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to a corresponding multibyte character string stored in the array
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pointed to by
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.Fa dst .
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No more than
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.Fa len
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bytes are written to
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.Fa dst .
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.Pp
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If
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.Fa dst
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is
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.Dv NULL ,
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no characters are stored.
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.Pp
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If
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.Fa dst
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is not
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.Dv NULL ,
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the pointer pointed to by
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.Fa src
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is updated to point to the character after the one that conversion stopped at.
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If conversion stops because a null character is encountered,
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.No * Ns Fa src
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is set to
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.Dv NULL .
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.Pp
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The
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.Ft mbstate_t
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argument,
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.Fa ps ,
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is used to keep track of the shift state.
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If it is
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.Dv NULL ,
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.Fn wcsrtombs
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uses an internal, static
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.Ft mbstate_t
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object.
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.Sh RETURN VALUES
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The
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.Fn wcsrtombs
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function returns the number of bytes stored in
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the array pointed to by
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.Fa dst
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(not including any terminating null), if successful, otherwise it returns
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.No ( Ns
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.Ft size_t Ns
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.No ) Ns -1 .
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.Sh ERRORS
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The
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.Fn wcsrtombs
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EILSEQ
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An invalid wide character was encountered.
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.El
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.Sh SEE ALSO
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.Xr mbsrtowcs 3 ,
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.Xr wcstombs 3 ,
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.Xr wcrtomb 3
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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 -isoC-99 .
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.Sh BUGS
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The current implementation does not support shift states.
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