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/*- |
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* Copyright (c) 2002 Tim J. Robbins. |
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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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/* |
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FUNCTION |
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<>, <>---read a wide character from standard input |
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INDEX |
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getwchar |
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INDEX |
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getwchar_unlocked |
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INDEX |
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_getwchar_r |
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INDEX |
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_getwchar_unlocked_r |
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ANSI_SYNOPSIS |
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#include |
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wint_t getwchar(void); |
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#define _GNU_SOURCE |
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#include |
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wint_t getwchar_unlocked(void); |
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#include |
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wint_t _getwchar_r(struct _reent *<[reent]>); |
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#include |
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wint_t _getwchar_unlocked_r(struct _reent *<[reent]>); |
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TRAD_SYNOPSIS |
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#include |
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wint_t getwchar(); |
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#define _GNU_SOURCE |
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#include |
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wint_t getwchar_unlocked(); |
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#include |
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wint_t _getwchar_r(<[reent]>) |
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char * <[reent]>; |
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#include |
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wint_t _getwchar_unlocked_r(<[reent]>) |
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char * <[reent]>; |
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DESCRIPTION |
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<> function or macro is the wide character equivalent of |
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the <> function. You can use <> to get the next |
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wide character from the standard input stream. As a side effect, |
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<> advances the standard input's current position indicator. |
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<> is a non-thread-safe version of <>. |
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<> may only safely be used within a scope |
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protected by flockfile() (or ftrylockfile()) and funlockfile(). This |
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function may safely be used in a multi-threaded program if and only |
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if they are called while the invoking thread owns the (FILE *) |
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object, as is the case after a successful call to the flockfile() or |
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ftrylockfile() functions. If threads are disabled, then |
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<> is equivalent to <>. |
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The alternate functions <<_getwchar_r>> and <<_getwchar_unlocked_r>> are |
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reentrant versions of the above. The extra argument <[reent]> is a pointer to |
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a reentrancy structure. |
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RETURNS |
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The next wide character cast to <>, unless there is no more |
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data, or the host system reports a read error; in either of these |
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situations, <> returns <>. |
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You can distinguish the two situations that cause an <> result by |
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using `<>' and `<>'. |
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PORTABILITY |
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<> is required by C99. |
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<> is a GNU extension. |
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*/ |
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#include <_ansi.h> |
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#include |
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#include |
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#include |
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#include "local.h" |
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#undef getwchar |
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wint_t |
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_DEFUN (_getwchar_r, (ptr), |
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struct _reent *ptr) |
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{ |
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return _fgetwc_r (ptr, stdin); |
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} |
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/* |
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* Synonym for fgetwc(stdin). |
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*/ |
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wint_t |
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_DEFUN_VOID (getwchar) |
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{ |
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_REENT_SMALL_CHECK_INIT (_REENT); |
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return fgetwc (stdin); |
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} |