/* PUTCHAR.C
 * 
 * Portions Copyright (c) 1990-2006 Nokia Corporation and/or its subsidiary(-ies).
 * All rights reserved.
 */

/*
 * 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
<<putchar>>---write a character (macro)

INDEX
	putchar
INDEX
	_putchar_r

ANSI_SYNOPSIS
	#include <stdio.h>
	int putchar(int <[ch]>);

	int _putchar_r(void *<[reent]>, int <[ch]>);

TRAD_SYNOPSIS
	#include <stdio.h>
	int putchar(<[ch]>)
	int <[ch]>;

	int _putchar_r(<[reent]>, <[ch]>)
	char *<[reent]>;
	int <[ch]>;

DESCRIPTION
<<putchar>> is a macro, defined in <<stdio.h>>.  <<putchar>>
writes its argument to the standard output stream,
after converting it from an <<int>> to an <<unsigned char>>.

The alternate function <<_putchar_r>> is a reentrant version.  The
extra argument <[reent]> is a pointer to a reentrancy structure.

RETURNS
If successful, <<putchar>> returns its argument <[ch]>.  If an error
intervenes, the result is <<EOF>>.  You can use `<<ferror(stdin)>>' to
query for errors.

PORTABILITY
ANSI C requires <<putchar>>; it suggests, but does not require, that
<<putchar>> be implemented as a macro.

Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
*/

/*
 * A subroutine version of the macro putchar
 */

#include <stdio_r.h>
#include "LOCAL.H"

#undef putchar

/**
A reentrant version of putchar().
*/
EXPORT_C int
_putchar_r (struct _reent *ptr,int c)
{
  return __sputc ((unsigned char)c, _stdout_r (ptr));
}

#ifndef _REENT_ONLY

#undef putchar
/**
Write character to standard output.
Writes character to the current position in the standard output
and increases the file pointer to point to next character.
This routine cooresponds to: putc(character,stdout).

@param c Character to be written. 

@return On Success, returns the written character.
		On Failure, EOF is returned and errno may be set.
*/
EXPORT_C int
putchar (int c)
{
  /* CHECK_INIT is (eventually) called by __swbuf.  */
  struct _reent *r = _REENT2;
  if (!r)
	return EOF; // Memory for library globals is not allocated (errno not set).
  return(_putchar_r (r, c));
}

#endif