Steve Karg
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/**************************************************************************
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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 BITS_H
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#define BITS_H
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/********************************************************************
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* Bit Masks
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*********************************************************************/
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#ifndef BIT
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#define BIT(x) (1<<(x))
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#endif
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#ifndef _BV
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#define _BV(x) (1<<(x))
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#endif
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/* a=register, b=bit number to act upon 0-n */
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#ifndef BIT_SET
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#define BIT_SET(a,b) ((a) |= (1<<(b)))
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#endif
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#ifndef BIT_CLEAR
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#define BIT_CLEAR(a,b) ((a) &= ~(1<<(b)))
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#endif
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#ifndef BIT_FLIP
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#define BIT_FLIP(a,b) ((a) ^= (1<<(b)))
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#endif
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#ifndef BIT_CHECK
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#define BIT_CHECK(a,b) ((a) & (1<<(b)))
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#endif
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/* x=target variable, y=mask */
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#ifndef BITMASK_SET
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#define BITMASK_SET(x,y) ((x) |= (y))
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#endif
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#ifndef BITMASK_CLEAR
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#define BITMASK_CLEAR(x,y) ((x) &= (~(y)))
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#endif
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#ifndef BITMASK_FLIP
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#define BITMASK_FLIP(x,y) ((x) ^= (y))
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#endif
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#ifndef BITMASK_CHECK
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#define BITMASK_CHECK(x,y) (((x) & (y)) == (y))
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#endif
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#endif
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