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	This supports common coding patterns. The GCC C front end before version 7 rejects the may_alias attribute on a struct definition if it was not present in a previous forward declaration, so this attribute can only be conditionally applied. This implements the spirit of the change in Austin Group issue 1641. Suggested-by: Marek Polacek <polacek@redhat.com> Suggested-by: Jakub Jelinek <jakub@redhat.com> Reviewed-by: Sam James <sam@gentoo.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
		
			
				
	
	
		
			52 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			52 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /* Definitions for use with Linux AF_ECONET sockets.
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|    Copyright (C) 1998-2024 Free Software Foundation, Inc.
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|    This file is part of the GNU C Library.
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| 
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|    The GNU C Library is free software; you can redistribute it and/or
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|    modify it under the terms of the GNU Lesser General Public
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|    License as published by the Free Software Foundation; either
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|    version 2.1 of the License, or (at your option) any later version.
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| 
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|    The GNU C Library is distributed in the hope that it will be useful,
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|    but WITHOUT ANY WARRANTY; without even the implied warranty of
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|    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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|    Lesser General Public License for more details.
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| 
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|    You should have received a copy of the GNU Lesser General Public
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|    License along with the GNU C Library; if not, see
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|    <https://www.gnu.org/licenses/>.  */
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| 
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| #ifndef _NETECONET_EC_H
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| #define _NETECONET_EC_H	1
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| 
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| #include <features.h>
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| #include <bits/sockaddr.h>
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| 
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| struct ec_addr
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|   {
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|     unsigned char station;		/* Station number.  */
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|     unsigned char net;			/* Network number.  */
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|   };
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| 
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| struct __attribute_struct_may_alias__ sockaddr_ec
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|   {
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|     __SOCKADDR_COMMON (sec_);
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|     unsigned char port;			/* Port number.  */
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|     unsigned char cb;			/* Control/flag byte.  */
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|     unsigned char type;			/* Type of message.  */
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|     struct ec_addr addr;
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|     unsigned long cookie;
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|   };
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| 
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| #define ECTYPE_PACKET_RECEIVED		0	/* Packet received */
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| #define ECTYPE_TRANSMIT_STATUS		0x10	/* Transmit completed */
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| 
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| #define ECTYPE_TRANSMIT_OK		1
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| #define ECTYPE_TRANSMIT_NOT_LISTENING	2
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| #define ECTYPE_TRANSMIT_NET_ERROR	3
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| #define ECTYPE_TRANSMIT_NO_CLOCK	4
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| #define ECTYPE_TRANSMIT_LINE_JAMMED	5
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| #define ECTYPE_TRANSMIT_NOT_PRESENT	6
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| 
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| #endif
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