sl@0: /* PUTCHAR.C
sl@0:  * 
sl@0:  * Portions Copyright (c) 1990-2006 Nokia Corporation and/or its subsidiary(-ies).
sl@0:  * All rights reserved.
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  * Copyright (c) 1990 The Regents of the University of California.
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms are permitted
sl@0:  * provided that the above copyright notice and this paragraph are
sl@0:  * duplicated in all such forms and that any documentation,
sl@0:  * advertising materials, and other materials related to such
sl@0:  * distribution and use acknowledge that the software was developed
sl@0:  * by the University of California, Berkeley.  The name of the
sl@0:  * University may not be used to endorse or promote products derived
sl@0:  * from this software without specific prior written permission.
sl@0:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
sl@0:  */
sl@0: 
sl@0: /*
sl@0: FUNCTION
sl@0: <<putchar>>---write a character (macro)
sl@0: 
sl@0: INDEX
sl@0: 	putchar
sl@0: INDEX
sl@0: 	_putchar_r
sl@0: 
sl@0: ANSI_SYNOPSIS
sl@0: 	#include <stdio.h>
sl@0: 	int putchar(int <[ch]>);
sl@0: 
sl@0: 	int _putchar_r(void *<[reent]>, int <[ch]>);
sl@0: 
sl@0: TRAD_SYNOPSIS
sl@0: 	#include <stdio.h>
sl@0: 	int putchar(<[ch]>)
sl@0: 	int <[ch]>;
sl@0: 
sl@0: 	int _putchar_r(<[reent]>, <[ch]>)
sl@0: 	char *<[reent]>;
sl@0: 	int <[ch]>;
sl@0: 
sl@0: DESCRIPTION
sl@0: <<putchar>> is a macro, defined in <<stdio.h>>.  <<putchar>>
sl@0: writes its argument to the standard output stream,
sl@0: after converting it from an <<int>> to an <<unsigned char>>.
sl@0: 
sl@0: The alternate function <<_putchar_r>> is a reentrant version.  The
sl@0: extra argument <[reent]> is a pointer to a reentrancy structure.
sl@0: 
sl@0: RETURNS
sl@0: If successful, <<putchar>> returns its argument <[ch]>.  If an error
sl@0: intervenes, the result is <<EOF>>.  You can use `<<ferror(stdin)>>' to
sl@0: query for errors.
sl@0: 
sl@0: PORTABILITY
sl@0: ANSI C requires <<putchar>>; it suggests, but does not require, that
sl@0: <<putchar>> be implemented as a macro.
sl@0: 
sl@0: Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
sl@0: <<lseek>>, <<read>>, <<sbrk>>, <<write>>.
sl@0: */
sl@0: 
sl@0: /*
sl@0:  * A subroutine version of the macro putchar
sl@0:  */
sl@0: 
sl@0: #include <stdio_r.h>
sl@0: #include "LOCAL.H"
sl@0: 
sl@0: #undef putchar
sl@0: 
sl@0: /**
sl@0: A reentrant version of putchar().
sl@0: */
sl@0: EXPORT_C int
sl@0: _putchar_r (struct _reent *ptr,int c)
sl@0: {
sl@0:   return __sputc ((unsigned char)c, _stdout_r (ptr));
sl@0: }
sl@0: 
sl@0: #ifndef _REENT_ONLY
sl@0: 
sl@0: #undef putchar
sl@0: /**
sl@0: Write character to standard output.
sl@0: Writes character to the current position in the standard output
sl@0: and increases the file pointer to point to next character.
sl@0: This routine cooresponds to: putc(character,stdout).
sl@0: 
sl@0: @param c Character to be written. 
sl@0: 
sl@0: @return On Success, returns the written character.
sl@0: 		On Failure, EOF is returned and errno may be set.
sl@0: */
sl@0: EXPORT_C int
sl@0: putchar (int c)
sl@0: {
sl@0:   /* CHECK_INIT is (eventually) called by __swbuf.  */
sl@0:   struct _reent *r = _REENT2;
sl@0:   if (!r)
sl@0: 	return EOF; // Memory for library globals is not allocated (errno not set).
sl@0:   return(_putchar_r (r, c));
sl@0: }
sl@0: 
sl@0: #endif