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/**************************************************************************
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*
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* Copyright (C) 2012 Steve Karg <skarg@users.sourceforge.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*********************************************************************/
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#ifndef KEY_H
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#define KEY_H
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#include <stdint.h>
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/* This file has the macros that encode and decode the */
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/* keys for the keylist when used with BACnet Object Id's */
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typedef uint32_t KEY;
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/* assuming a 32 bit KEY */
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#define KEY_TYPE_OFFSET 22 /* bits - for BACnet */
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#define KEY_TYPE_MASK 0x000003FFL
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#define KEY_ID_MASK 0x003FFFFFL
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#define KEY_ID_MAX (KEY_ID_MASK + 1L)
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#define KEY_TYPE_MAX (KEY_TYPE_MASK + 1L)
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#define KEY_LAST(key) ((key & KEY_ID_MASK) == KEY_ID_MAX)
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#define KEY_ENCODE(type,id) ( ((unsigned int)\
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((unsigned int)(type) & KEY_TYPE_MASK) << KEY_TYPE_OFFSET) |\
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((unsigned int)(id) & KEY_ID_MASK) )
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#define KEY_DECODE_TYPE(key) ((int)(((unsigned int)(key) >> KEY_TYPE_OFFSET)\
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& KEY_TYPE_MASK))
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#define KEY_DECODE_ID(key) ((int)((unsigned int)(key) & KEY_ID_MASK))
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#endif
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