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      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 _getw = getw
     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 /* Read sizeof(int) characters from stream and return these in an int */
     49 int
     50 getw(FILE *stream)
     51 {
     52 	int w;
     53 	char *s = (char *)&w;
     54 	int i = sizeof (int);
     55 	int ret;
     56 	rmutex_t *lk;
     57 
     58 	FLOCKFILE(lk, stream);
     59 	while (--i >= 0 && !(stream->_flag & (_IOERR | _IOEOF)))
     60 		*s++ = GETC(stream);
     61 	ret = ((stream->_flag & (_IOERR | _IOEOF)) ? EOF : w);
     62 	FUNLOCKFILE(lk);
     63 	return (ret);
     64 }
     65