98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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FUNCTION
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<<putchar>>---write a character (macro)
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INDEX
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putchar
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INDEX
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_putchar_r
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ANSI_SYNOPSIS
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#include <stdio.h>
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int putchar(int <[ch]>);
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int _putchar_r(void *<[reent]>, int <[ch]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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int putchar(<[ch]>)
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int <[ch]>;
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int _putchar_r(<[reent]>, <[ch]>)
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char *<[reent]>;
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int <[ch]>;
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DESCRIPTION
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<<putchar>> is a macro, defined in <<stdio.h>>. <<putchar>>
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writes its argument to the standard output stream,
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after converting it from an <<int>> to an <<unsigned char>>.
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The alternate function <<_putchar_r>> is a reentrant version. The
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extra argument <[reent]> is a pointer to a reentrancy structure.
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RETURNS
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If successful, <<putchar>> returns its argument <[ch]>. If an error
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intervenes, the result is <<EOF>>. You can use `<<ferror(stdin)>>' to
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query for errors.
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PORTABILITY
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ANSI C requires <<putchar>>; it suggests, but does not require, that
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<<putchar>> be implemented as a macro.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "%W% (Berkeley) %G%";
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#endif /* LIBC_SCCS and not lint */
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/*
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* A subroutine version of the macro putchar.
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*/
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#include <stdio.h>
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#include "local.h"
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#undef putchar
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int
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_putchar_r (ptr, c)
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struct _reent *ptr;
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int c;
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{
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_REENT_SMALL_CHECK_INIT(_stdout_r (ptr));
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return putc (c, _stdout_r (ptr));
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}
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#ifndef _REENT_ONLY
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int
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putchar (c)
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int c;
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{
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/* CHECK_INIT is (eventually) called by __swbuf. */
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return _putchar_r (_REENT, c);
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}
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#endif
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