xref: /freebsd/lib/libc/stdio/getchar.c (revision 25070501c638474bf35d30c744d449fdfee787e7)
158f0484fSRodney W. Grimes /*-
258f0484fSRodney W. Grimes  * Copyright (c) 1990, 1993
358f0484fSRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
458f0484fSRodney W. Grimes  *
558f0484fSRodney W. Grimes  * This code is derived from software contributed to Berkeley by
658f0484fSRodney W. Grimes  * Chris Torek.
758f0484fSRodney W. Grimes  *
858f0484fSRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
958f0484fSRodney W. Grimes  * modification, are permitted provided that the following conditions
1058f0484fSRodney W. Grimes  * are met:
1158f0484fSRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
1258f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
1358f0484fSRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
1458f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
1558f0484fSRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
161d8053c5SEd Maste  * 3. Neither the name of the University nor the names of its contributors
1758f0484fSRodney W. Grimes  *    may be used to endorse or promote products derived from this software
1858f0484fSRodney W. Grimes  *    without specific prior written permission.
1958f0484fSRodney W. Grimes  *
2058f0484fSRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2158f0484fSRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2258f0484fSRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2358f0484fSRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2458f0484fSRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2558f0484fSRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2658f0484fSRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2758f0484fSRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2858f0484fSRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2958f0484fSRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3058f0484fSRodney W. Grimes  * SUCH DAMAGE.
3158f0484fSRodney W. Grimes  */
3258f0484fSRodney W. Grimes 
3358f0484fSRodney W. Grimes #if defined(LIBC_SCCS) && !defined(lint)
3458f0484fSRodney W. Grimes static char sccsid[] = "@(#)getchar.c	8.1 (Berkeley) 6/4/93";
3558f0484fSRodney W. Grimes #endif /* LIBC_SCCS and not lint */
36333fc21eSDavid E. O'Brien #include <sys/cdefs.h>
37333fc21eSDavid E. O'Brien __FBSDID("$FreeBSD$");
3858f0484fSRodney W. Grimes 
3958f0484fSRodney W. Grimes /*
4058f0484fSRodney W. Grimes  * A subroutine version of the macro getchar.
4158f0484fSRodney W. Grimes  */
42d201fe46SDaniel Eischen #include "namespace.h"
4358f0484fSRodney W. Grimes #include <stdio.h>
44d201fe46SDaniel Eischen #include "un-namespace.h"
45e74101e4STim J. Robbins #include "local.h"
46ec216c26SJohn Birrell #include "libc_private.h"
4758f0484fSRodney W. Grimes 
4819e03ca8SJohn Baldwin #undef getchar
4919e03ca8SJohn Baldwin #undef getchar_unlocked
5019e03ca8SJohn Baldwin 
51f70177e7SJulian Elischer int
52*25070501SCraig Rodrigues getchar(void)
5358f0484fSRodney W. Grimes {
54f70177e7SJulian Elischer 	int retval;
55ec216c26SJohn Birrell 	FLOCKFILE(stdin);
56f639538cSTim J. Robbins 	/* Orientation set by __sgetc() when buffer is empty. */
57f639538cSTim J. Robbins 	/* ORIENT(stdin, -1); */
582df1baf6STim J. Robbins 	retval = __sgetc(stdin);
59ec216c26SJohn Birrell 	FUNLOCKFILE(stdin);
60f70177e7SJulian Elischer 	return (retval);
6158f0484fSRodney W. Grimes }
62c17bf9a9SJohn Baldwin 
63c17bf9a9SJohn Baldwin int
64c17bf9a9SJohn Baldwin getchar_unlocked(void)
65c17bf9a9SJohn Baldwin {
66c17bf9a9SJohn Baldwin 
67c17bf9a9SJohn Baldwin 	return (__sgetc(stdin));
68c17bf9a9SJohn Baldwin }
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