113 lines
3.1 KiB
C
113 lines
3.1 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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* and/or 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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<<putc>>---write a character (macro)
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INDEX
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putc
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INDEX
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_putc_r
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SYNOPSIS
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#include <stdio.h>
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int putc(int <[ch]>, FILE *<[fp]>);
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#include <stdio.h>
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int _putc_r(struct _reent *<[ptr]>, int <[ch]>, FILE *<[fp]>);
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DESCRIPTION
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<<putc>> is a macro, defined in <<stdio.h>>. <<putc>>
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writes the argument <[ch]> to the file or stream identified by
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<[fp]>, after converting it from an <<int>> to an <<unsigned char>>.
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If the file was opened with append mode (or if the stream cannot
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support positioning), then the new character goes at the end of the
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file or stream. Otherwise, the new character is written at the
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current value of the position indicator, and the position indicator
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advances by one.
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For a subroutine version of this macro, see <<fputc>>.
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The <<_putc_r>> function is simply the reentrant version of
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<<putc>> that takes an additional reentrant structure argument: <[ptr]>.
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RETURNS
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If successful, <<putc>> returns its argument <[ch]>. If an error
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intervenes, the result is <<EOF>>. You can use `<<ferror(<[fp]>)>>' to
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query for errors.
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PORTABILITY
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ANSI C requires <<putc>>; it suggests, but does not require, that
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<<putc>> be implemented as a macro. The standard explicitly permits
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macro implementations of <<putc>> to use the <[fp]> argument more than once;
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therefore, in a portable program, you should not use an expression
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with side effects as this argument.
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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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#include <_ansi.h>
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#include <stdio.h>
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#include "local.h"
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/*
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* A subroutine version of the macro putc.
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*/
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#undef putc
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int
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_putc_r (struct _reent *ptr,
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int c,
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register FILE *fp)
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{
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int result;
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CHECK_INIT (ptr, fp);
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_newlib_flockfile_start (fp);
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result = __sputc_r (ptr, c, fp);
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_newlib_flockfile_end (fp);
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return result;
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}
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#ifndef _REENT_ONLY
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int
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putc (int c,
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register FILE *fp)
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{
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#if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__)
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int result;
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struct _reent *reent = _REENT;
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CHECK_INIT (reent, fp);
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_newlib_flockfile_start (fp);
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result = __sputc_r (reent, c, fp);
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_newlib_flockfile_end (fp);
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return result;
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#else
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return _putc_r (_REENT, c, fp);
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#endif
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}
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#endif /* !_REENT_ONLY */
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