284 lines
6.4 KiB
Groff
284 lines
6.4 KiB
Groff
.\" Copyright (c) 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" Paul Borman at Krystal Technologies.
|
|
.\"
|
|
.\" 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.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)rune.3 8.2 (Berkeley) 12/11/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd October 6, 2002
|
|
.Dt RUNE 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm setrunelocale ,
|
|
.Nm setinvalidrune ,
|
|
.Nm sgetrune ,
|
|
.Nm sputrune ,
|
|
.Nm fgetrune ,
|
|
.Nm fungetrune ,
|
|
.Nm fputrune
|
|
.Nd rune support for C
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In rune.h
|
|
.In errno.h
|
|
.Ft int
|
|
.Fn setrunelocale "char *locale"
|
|
.Ft void
|
|
.Fn setinvalidrune "rune_t rune"
|
|
.Ft rune_t
|
|
.Fn sgetrune "const char *string" "size_t n" "char const **result"
|
|
.Ft int
|
|
.Fn sputrune "rune_t rune" "char *string" "size_t n" "char **result"
|
|
.Pp
|
|
.In stdio.h
|
|
.Ft long
|
|
.Fn fgetrune "FILE *stream"
|
|
.Ft int
|
|
.Fn fungetrune "rune_t rune" "FILE *stream"
|
|
.Ft int
|
|
.Fn fputrune "rune_t rune" "FILE *stream"
|
|
.Sh DESCRIPTION
|
|
.Bf Em
|
|
The
|
|
.Bx 4.4
|
|
.Dq rune
|
|
functions have been deprecated in favour of the
|
|
.Tn ISO
|
|
C99 extended multibyte and wide character facilities
|
|
and should not be used in new applications.
|
|
.Ef
|
|
Consider using
|
|
.Xr setlocale 3 ,
|
|
.Xr mbrtowc 3 ,
|
|
.Xr wcrtomb 3 ,
|
|
.Xr fgetwc 3 ,
|
|
.Xr ungetwc 3 ,
|
|
and
|
|
.Xr fputwc 3
|
|
instead.
|
|
.Pp
|
|
The
|
|
.Fn setrunelocale
|
|
controls the type of encoding used to represent runes as multibyte strings
|
|
as well as the properties of the runes as defined in
|
|
.In ctype.h .
|
|
The
|
|
.Fa locale
|
|
argument indicates which locale to load.
|
|
If the locale is successfully loaded,
|
|
.Dv 0
|
|
is returned, otherwise an errno value is returned to indicate the
|
|
type of error.
|
|
.Pp
|
|
The
|
|
.Fn setinvalidrune
|
|
function sets the value of the global value
|
|
.Dv _INVALID_RUNE
|
|
to be
|
|
.Fa rune .
|
|
.Pp
|
|
The
|
|
.Fn sgetrune
|
|
function tries to read a single multibyte character from
|
|
.Fa string ,
|
|
which is at most
|
|
.Fa n
|
|
bytes long.
|
|
If
|
|
.Fn sgetrune
|
|
is successful, the rune is returned.
|
|
If
|
|
.Fa result
|
|
is not
|
|
.Dv NULL ,
|
|
.Fa *result
|
|
will point to the first byte which was not converted in
|
|
.Fa string .
|
|
If the first
|
|
.Fa n
|
|
bytes of
|
|
.Fa string
|
|
do not describe a full multibyte character,
|
|
.Dv _INVALID_RUNE
|
|
is returned and
|
|
.Fa *result
|
|
will point to
|
|
.Fa string .
|
|
If there is an encoding error at the start of
|
|
.Fa string ,
|
|
.Dv _INVALID_RUNE
|
|
is returned and
|
|
.Fa *result
|
|
will point to the second character of
|
|
.Fa string .
|
|
.Pp
|
|
the
|
|
.Fn sputrune
|
|
function tries to encode
|
|
.Fa rune
|
|
as a multibyte string and store it at
|
|
.Fa string ,
|
|
but no more than
|
|
.Fa n
|
|
bytes will be stored.
|
|
If
|
|
.Fa result
|
|
is not
|
|
.Dv NULL ,
|
|
.Fa *result
|
|
will be set to point to the first byte in string following the new
|
|
multibyte character.
|
|
If
|
|
.Fa string
|
|
is
|
|
.Dv NULL ,
|
|
.Fa *result
|
|
will point to
|
|
.Dv "(char *)0 +"
|
|
.Fa x ,
|
|
where
|
|
.Fa x
|
|
is the number of bytes that would be needed to store the multibyte value.
|
|
If the multibyte character would consist of more than
|
|
.Fa n
|
|
bytes and
|
|
.Fa result
|
|
is not
|
|
.Dv NULL ,
|
|
.Fa *result
|
|
will be set to
|
|
.Dv NULL .
|
|
In all cases,
|
|
.Fn sputrune
|
|
will return the number of bytes which would be needed to store
|
|
.Fa rune
|
|
as a multibyte character.
|
|
.Pp
|
|
The
|
|
.Fn fgetrune
|
|
function operates the same as
|
|
.Fn sgetrune
|
|
with the exception that it attempts to read enough bytes from
|
|
.Fa stream
|
|
to decode a single rune. It returns either
|
|
.Dv EOF
|
|
on end of file,
|
|
.Dv _INVALID_RUNE
|
|
on an encoding error, or the rune decoded if all went well.
|
|
.Pp
|
|
The
|
|
.Fn fungetrune
|
|
function pushes the multibyte encoding, as provided by
|
|
.Fn sputrune ,
|
|
of
|
|
.Fa rune
|
|
onto
|
|
.Fa stream
|
|
such that the next
|
|
.Fn fgetrune
|
|
call will return
|
|
.Fa rune .
|
|
It returns
|
|
.Dv EOF
|
|
if it fails and
|
|
.Dv 0
|
|
on success.
|
|
.Pp
|
|
The
|
|
.Fn fputrune
|
|
function writes the multibyte encoding of
|
|
.Fa rune ,
|
|
as provided by
|
|
.Fn sputrune ,
|
|
onto
|
|
.Fa stream .
|
|
It returns
|
|
.Dv EOF
|
|
on failure and
|
|
.Dv 0
|
|
on success.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn setrunelocale
|
|
function returns one of the following values:
|
|
.Bl -tag -width Er
|
|
.It Er 0
|
|
The
|
|
.Fn setrunelocale
|
|
function
|
|
was successful.
|
|
.It Bq Er EINVAL
|
|
The
|
|
.Fa locale
|
|
name was incorrect.
|
|
.It Bq Er ENOENT
|
|
The locale could not be found.
|
|
.It Bq Er EFTYPE
|
|
The file found was not a valid file.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn sgetrune
|
|
function either returns the rune read or
|
|
.Dv _INVALID_RUNE .
|
|
The
|
|
.Fn sputrune
|
|
function returns the number of bytes needed to store
|
|
.Fa rune
|
|
as a multibyte string.
|
|
.Sh FILES
|
|
.Bl -tag -width /usr/share/locale/locale/LC_CTYPE -compact
|
|
.It Pa $PATH_LOCALE/ Ns Em locale Ns /LC_CTYPE
|
|
.It Pa /usr/share/locale/ Ns Em locale Ns /LC_CTYPE
|
|
binary LC_CTYPE file for the locale
|
|
.Em locale .
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr mbrune 3 ,
|
|
.Xr setlocale 3 ,
|
|
.Xr euc 4 ,
|
|
.Xr utf2 4 ,
|
|
.Xr utf8 5
|
|
.Sh HISTORY
|
|
These functions first appeared in
|
|
.Bx 4.4 .
|
|
.Pp
|
|
The
|
|
.Fn setrunelocale
|
|
function and the other non-ANSI rune functions were inspired by
|
|
.Sy "Plan 9 from Bell Labs" .
|
|
.\"They were conceived at the San Diego 1993 Summer USENIX conference by
|
|
.\"Paul Borman of Krystal Technologies, Keith Bostic of CSRG and Andrew Hume
|
|
.\"of Bell Labs.
|