1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/genericopenlibs/cstdlib/LSTDIO/GETCHAR.C	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,110 @@
     1.4 +/* GETCHAR.C
     1.5 + * 
     1.6 + * Portions Copyright (c) 1990-2006 Nokia Corporation and/or its subsidiary(-ies).
     1.7 + * All rights reserved.
     1.8 + */
     1.9 +
    1.10 +/*
    1.11 + * Copyright (c) 1990 The Regents of the University of California.
    1.12 + * All rights reserved.
    1.13 + *
    1.14 + * Redistribution and use in source and binary forms are permitted
    1.15 + * provided that the above copyright notice and this paragraph are
    1.16 + * duplicated in all such forms and that any documentation,
    1.17 + * advertising materials, and other materials related to such
    1.18 + * distribution and use acknowledge that the software was developed
    1.19 + * by the University of California, Berkeley.  The name of the
    1.20 + * University may not be used to endorse or promote products derived
    1.21 + * from this software without specific prior written permission.
    1.22 + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
    1.23 + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
    1.24 + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    1.25 + */
    1.26 +
    1.27 +/*
    1.28 +FUNCTION
    1.29 +<<getchar>>---read a character (macro)
    1.30 +
    1.31 +INDEX
    1.32 +	getchar
    1.33 +INDEX
    1.34 +	_getchar_r
    1.35 +
    1.36 +ANSI_SYNOPSIS
    1.37 +	#include <stdio.h>
    1.38 +	int getchar(void);
    1.39 +
    1.40 +	int _getchar_r(void *<[reent]>);
    1.41 +
    1.42 +TRAD_SYNOPSIS
    1.43 +	#include <stdio.h>
    1.44 +	int getchar();
    1.45 +
    1.46 +	int _getchar_r(<[reent]>)
    1.47 +	char * <[reent]>;
    1.48 +
    1.49 +DESCRIPTION
    1.50 +<<getchar>> is a macro, defined in <<stdio.h>>.  You can use <<getchar>>
    1.51 +to get the next single character from the standard input stream.
    1.52 +As a side effect, <<getchar>> advances the standard input's
    1.53 +current position indicator.
    1.54 +
    1.55 +The alternate function <<_getchar_r>> is a reentrant version.  The
    1.56 +extra argument <[reent]> is a pointer to a reentrancy structure.
    1.57 +
    1.58 +
    1.59 +RETURNS
    1.60 +The next character (read as an <<unsigned char>>, and cast to
    1.61 +<<int>>), unless there is no more data, or the host system reports a
    1.62 +read error; in either of these situations, <<getchar>> returns <<EOF>>.
    1.63 +
    1.64 +You can distinguish the two situations that cause an <<EOF>> result by
    1.65 +using `<<ferror(stdin)>>' and `<<feof(stdin)>>'.
    1.66 +
    1.67 +PORTABILITY
    1.68 +ANSI C requires <<getchar>>; it suggests, but does not require, that
    1.69 +<<getchar>> be implemented as a macro.
    1.70 +
    1.71 +Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
    1.72 +<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
    1.73 +*/
    1.74 +
    1.75 +/*
    1.76 + * A subroutine version of the macro getchar.
    1.77 + */
    1.78 +
    1.79 +#include <stdio_r.h>
    1.80 +#include <reent.h>
    1.81 +
    1.82 +#undef getchar
    1.83 +
    1.84 +/**
    1.85 +A reentrant version of getchar().
    1.86 +*/
    1.87 +EXPORT_C int
    1.88 +_getchar_r (struct _reent *f)
    1.89 +{
    1.90 +  return getc (_stdin_r (f));
    1.91 +}
    1.92 +
    1.93 +#ifndef _REENT_ONLY
    1.94 +
    1.95 +/**
    1.96 +Get the next character from stdin.Returns the next character from the
    1.97 +standard input.
    1.98 +
    1.99 +@return On Success, the character read is returned as an int. 
   1.100 +		On Failure, returns EOF, if the 'End Of File' is reached or there has
   1.101 +		been an error reading and errno may be set.
   1.102 +*/
   1.103 +EXPORT_C int
   1.104 +getchar (void)
   1.105 +{
   1.106 +  /* CHECK_INIT is called (eventually) by __srefill.  */
   1.107 +  struct _reent *r = _REENT2;
   1.108 +  if (!r)
   1.109 +	return EOF; // Memory for library globals is not allocated (errno not set).
   1.110 +  return _getchar_r (r);
   1.111 +}
   1.112 +
   1.113 +#endif