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65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
/* $Id: tape.c,v 1.1 2003/08/05 03:27:12 fredette Exp $ */
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/* generic/tape.c - generic tape implementation support: */
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/*
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* Copyright (c) 2003 Matt Fredette
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Matt Fredette.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <tme/common.h>
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_TME_RCSID("$Id: tape.c,v 1.1 2003/08/05 03:27:12 fredette Exp $");
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/* includes: */
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#include <tme/generic/tape.h>
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/* this scores a tape connection: */
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int
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tme_tape_connection_score(struct tme_connection *conn,
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unsigned int *_score)
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{
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struct tme_tape_connection *conn_tape;
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struct tme_tape_connection *conn_tape_other;
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/* both sides must be tape connections: */
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assert(conn->tme_connection_type == TME_CONNECTION_TAPE);
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assert(conn->tme_connection_other->tme_connection_type == TME_CONNECTION_TAPE);
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/* you cannot connect a tape to a tape, or a tape frontend to a tape
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frontend: */
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conn_tape = (struct tme_tape_connection *) conn;
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conn_tape_other = (struct tme_tape_connection *) conn->tme_connection_other;
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*_score
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= ((conn_tape->tme_tape_connection_read != NULL
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|| conn_tape->tme_tape_connection_write != NULL)
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!= (conn_tape_other->tme_tape_connection_read != NULL
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|| conn_tape_other->tme_tape_connection_write != NULL));
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return (TME_OK);
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}
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