forked from KolibriOS/kolibrios
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
|
/*
|
||
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms are permitted
|
||
|
|
* provided that the above copyright notice and this paragraph are
|
||
|
|
* duplicated in all such forms and that any documentation,
|
||
|
|
* advertising materials, and other materials related to such
|
||
|
|
* distribution and use acknowledge that the software was developed
|
||
|
|
* by the University of California, Berkeley. The name of the
|
||
|
|
* University may not be used to endorse or promote products derived
|
||
|
|
* from this software without specific prior written permission.
|
||
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
||
|
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
||
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
FUNCTION
|
||
|
|
<<getchar>>---read a character (macro)
|
||
|
|
|
||
|
|
INDEX
|
||
|
|
getchar
|
||
|
|
INDEX
|
||
|
|
_getchar_r
|
||
|
|
|
||
|
|
ANSI_SYNOPSIS
|
||
|
|
#include <stdio.h>
|
||
|
|
int getchar(void);
|
||
|
|
|
||
|
|
int _getchar_r(struct _reent *<[reent]>);
|
||
|
|
|
||
|
|
TRAD_SYNOPSIS
|
||
|
|
#include <stdio.h>
|
||
|
|
int getchar();
|
||
|
|
|
||
|
|
int _getchar_r(<[reent]>)
|
||
|
|
char * <[reent]>;
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
<<getchar>> is a macro, defined in <<stdio.h>>. You can use <<getchar>>
|
||
|
|
to get the next single character from the standard input stream.
|
||
|
|
As a side effect, <<getchar>> advances the standard input's
|
||
|
|
current position indicator.
|
||
|
|
|
||
|
|
The alternate function <<_getchar_r>> is a reentrant version. The
|
||
|
|
extra argument <[reent]> is a pointer to a reentrancy structure.
|
||
|
|
|
||
|
|
|
||
|
|
RETURNS
|
||
|
|
The next character (read as an <<unsigned char>>, and cast to
|
||
|
|
<<int>>), unless there is no more data, or the host system reports a
|
||
|
|
read error; in either of these situations, <<getchar>> returns <<EOF>>.
|
||
|
|
|
||
|
|
You can distinguish the two situations that cause an <<EOF>> result by
|
||
|
|
using `<<ferror(stdin)>>' and `<<feof(stdin)>>'.
|
||
|
|
|
||
|
|
PORTABILITY
|
||
|
|
ANSI C requires <<getchar>>; it suggests, but does not require, that
|
||
|
|
<<getchar>> be implemented as a macro.
|
||
|
|
|
||
|
|
Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
|
||
|
|
<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||
|
|
static char sccsid[] = "%W% (Berkeley) %G%";
|
||
|
|
#endif /* LIBC_SCCS and not lint */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A subroutine version of the macro getchar.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <_ansi.h>
|
||
|
|
#include <reent.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "local.h"
|
||
|
|
|
||
|
|
#undef getchar
|
||
|
|
|
||
|
|
int
|
||
|
|
_DEFUN(_getchar_r, (reent),
|
||
|
|
struct _reent *reent)
|
||
|
|
{
|
||
|
|
_REENT_SMALL_CHECK_INIT (reent);
|
||
|
|
return _getc_r (reent, _stdin_r (reent));
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef _REENT_ONLY
|
||
|
|
|
||
|
|
int
|
||
|
|
_DEFUN_VOID(getchar)
|
||
|
|
{
|
||
|
|
struct _reent *reent = _REENT;
|
||
|
|
|
||
|
|
/* CHECK_INIT is called (eventually) by __srefill_r. */
|
||
|
|
_REENT_SMALL_CHECK_INIT (reent);
|
||
|
|
return _getc_r (reent, _stdin_r (reent));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|