/*-
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/*-
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* Copyright (c) 2002-2004 Tim J. Robbins.
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* Copyright (c) 2002-2004 Tim J. Robbins.
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* All rights reserved.
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* All rights reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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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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* modification, are permitted provided that the following conditions
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* are met:
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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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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* 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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* 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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* 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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* documentation and/or other materials provided with the distribution.
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*
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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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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* 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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* 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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* 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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* 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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* 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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* 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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* 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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* 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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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* SUCH DAMAGE.
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*/
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*/
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/*
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/*
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FUNCTION
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FUNCTION
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<<fgetwc>>, <<getwc>>---get a wide character from a file or stream
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<<fgetwc>>, <<getwc>>---get a wide character from a file or stream
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INDEX
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INDEX
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fgetwc
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fgetwc
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INDEX
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INDEX
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_fgetwc_r
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_fgetwc_r
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INDEX
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INDEX
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getwc
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getwc
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INDEX
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INDEX
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_getwc_r
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_getwc_r
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ANSI_SYNOPSIS
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ANSI_SYNOPSIS
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t fgetwc(FILE *<[fp]>);
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wint_t fgetwc(FILE *<[fp]>);
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t _fgetwc_r(struct _reent *<[ptr]>, FILE *<[fp]>);
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wint_t _fgetwc_r(struct _reent *<[ptr]>, FILE *<[fp]>);
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t getwc(FILE *<[fp]>);
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wint_t getwc(FILE *<[fp]>);
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t _getwc_r(struct _reent *<[ptr]>, FILE *<[fp]>);
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wint_t _getwc_r(struct _reent *<[ptr]>, FILE *<[fp]>);
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TRAD_SYNOPSIS
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TRAD_SYNOPSIS
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t fgetwc(<[fp]>)
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wint_t fgetwc(<[fp]>)
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FILE *<[fp]>;
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FILE *<[fp]>;
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t _fgetwc_r(<[ptr]>, <[fp]>)
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wint_t _fgetwc_r(<[ptr]>, <[fp]>)
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struct _reent *<[ptr]>;
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struct _reent *<[ptr]>;
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FILE *<[fp]>;
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FILE *<[fp]>;
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t getwc(<[fp]>)
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wint_t getwc(<[fp]>)
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FILE *<[fp]>;
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FILE *<[fp]>;
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#include <stdio.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <wchar.h>
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wint_t _getwc_r(<[ptr]>, <[fp]>)
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wint_t _getwc_r(<[ptr]>, <[fp]>)
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struct _reent *<[ptr]>;
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struct _reent *<[ptr]>;
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FILE *<[fp]>;
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FILE *<[fp]>;
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DESCRIPTION
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DESCRIPTION
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Use <<fgetwc>> to get the next wide character from the file or stream
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Use <<fgetwc>> to get the next wide character from the file or stream
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identified by <[fp]>. As a side effect, <<fgetwc>> advances the file's
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identified by <[fp]>. As a side effect, <<fgetwc>> advances the file's
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current position indicator.
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current position indicator.
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The <<getwc>> function or macro functions identically to <<fgetwc>>. It
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The <<getwc>> function or macro functions identically to <<fgetwc>>. It
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may be implemented as a macro, and may evaluate its argument more than
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may be implemented as a macro, and may evaluate its argument more than
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once. There is no reason ever to use it.
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once. There is no reason ever to use it.
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<<_fgetwc_r>> and <<_getwc_r>> are simply reentrant versions of
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<<_fgetwc_r>> and <<_getwc_r>> are simply reentrant versions of
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<<fgetwc>> and <<getwc>> that are passed the additional reentrant
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<<fgetwc>> and <<getwc>> that are passed the additional reentrant
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structure pointer argument: <[ptr]>.
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structure pointer argument: <[ptr]>.
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RETURNS
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RETURNS
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The next wide character cast to <<wint_t>>), unless there is no more data,
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The next wide character cast to <<wint_t>>), unless there is no more data,
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or the host system reports a read error; in either of these situations,
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or the host system reports a read error; in either of these situations,
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<<fgetwc>> and <<getwc>> return <<WEOF>>.
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<<fgetwc>> and <<getwc>> return <<WEOF>>.
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You can distinguish the two situations that cause an <<EOF>> result by
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You can distinguish the two situations that cause an <<EOF>> result by
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using the <<ferror>> and <<feof>> functions.
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using the <<ferror>> and <<feof>> functions.
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PORTABILITY
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PORTABILITY
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C99, POSIX.1-2001
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C99, POSIX.1-2001
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*/
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*/
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#include <_ansi.h>
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#include <_ansi.h>
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#include <reent.h>
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#include <reent.h>
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#include <errno.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <wchar.h>
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#include "local.h"
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#include "local.h"
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static wint_t
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static wint_t
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_DEFUN(__fgetwc, (ptr, fp),
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_DEFUN(__fgetwc, (ptr, fp),
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struct _reent *ptr _AND
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struct _reent *ptr _AND
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register FILE *fp)
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register FILE *fp)
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{
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{
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wchar_t wc;
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wchar_t wc;
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size_t nconv;
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size_t nconv;
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if (fp->_r <= 0 && __srefill_r (ptr, fp))
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if (fp->_r <= 0 && __srefill_r (ptr, fp))
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return (WEOF);
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return (WEOF);
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if (MB_CUR_MAX == 1)
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if (MB_CUR_MAX == 1)
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{
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{
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/* Fast path for single-byte encodings. */
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/* Fast path for single-byte encodings. */
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wc = *fp->_p++;
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wc = *fp->_p++;
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fp->_r--;
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fp->_r--;
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return (wc);
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return (wc);
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}
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}
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do
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do
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{
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{
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nconv = _mbrtowc_r (ptr, &wc, (char *) fp->_p, fp->_r, &fp->_mbstate);
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nconv = _mbrtowc_r (ptr, &wc, (char *) fp->_p, fp->_r, &fp->_mbstate);
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if (nconv == (size_t)-1)
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if (nconv == (size_t)-1)
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break;
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break;
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else if (nconv == (size_t)-2)
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else if (nconv == (size_t)-2)
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continue;
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continue;
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else if (nconv == 0)
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else if (nconv == 0)
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{
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{
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/*
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/*
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* Assume that the only valid representation of
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* Assume that the only valid representation of
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* the null wide character is a single null byte.
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* the null wide character is a single null byte.
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*/
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*/
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fp->_p++;
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fp->_p++;
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fp->_r--;
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fp->_r--;
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return (L'\0');
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return (L'\0');
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}
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}
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else
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else
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{
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{
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fp->_p += nconv;
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fp->_p += nconv;
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fp->_r -= nconv;
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fp->_r -= nconv;
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return (wc);
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return (wc);
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}
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}
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}
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}
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while (__srefill_r(ptr, fp) == 0);
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while (__srefill_r(ptr, fp) == 0);
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fp->_flags |= __SERR;
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fp->_flags |= __SERR;
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errno = EILSEQ;
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errno = EILSEQ;
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return (WEOF);
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return (WEOF);
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}
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}
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wint_t
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wint_t
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_DEFUN(_fgetwc_r, (ptr, fp),
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_DEFUN(_fgetwc_r, (ptr, fp),
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struct _reent *ptr _AND
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struct _reent *ptr _AND
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register FILE *fp)
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register FILE *fp)
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{
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{
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wint_t r;
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wint_t r;
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__sfp_lock_acquire ();
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__sfp_lock_acquire ();
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_flockfile (fp);
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_flockfile (fp);
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ORIENT(fp, 1);
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ORIENT(fp, 1);
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r = __fgetwc (ptr, fp);
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r = __fgetwc (ptr, fp);
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_funlockfile (fp);
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_funlockfile (fp);
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__sfp_lock_release ();
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__sfp_lock_release ();
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return r;
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return r;
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}
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}
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wint_t
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wint_t
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_DEFUN(fgetwc, (fp),
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_DEFUN(fgetwc, (fp),
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FILE *fp)
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FILE *fp)
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{
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{
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CHECK_INIT(_REENT, fp);
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CHECK_INIT(_REENT, fp);
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return _fgetwc_r (_REENT, fp);
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return _fgetwc_r (_REENT, fp);
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}
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}
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