usr/src/lib/libc/port/stdio/putw.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 /*
  33  * The intent here is to provide a means to make the order of
  34  * bytes in an io-stream correspond to the order of the bytes
  35  * in the memory while doing the io a `word' at a time.
  36  */
  37
  38 #pragma weak _putw = putw
  39
  40 #include "lint.h"
  41 #include "file64.h"
  42 #include "mtlib.h"
  43 #include <stdio.h>
  44 #include <thread.h>
  45 #include <synch.h>
  46 #include "stdiom.h"
  47
  48 int
  49 putw(int w, FILE *stream)
  50 {
  51         char *s = (char *)&w;
  52         int i = sizeof (int);
  53         int ret;
  54         rmutex_t *lk;
  55
  56         FLOCKFILE(lk, stream);
  57         while (--i >= 0 && PUTC(*s++, stream) != EOF)
  58                 ;
  59         ret = stream->_flag & _IOERR;
  60         FUNLOCKFILE(lk);
  61         return (ret);
  62 }