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include/bits.h

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+/**************************************************************************
+*
+* Copyright (C) 2012 Steve Karg <skarg@users.sourceforge.net>
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*********************************************************************/
+#ifndef BITS_H
+#define BITS_H
+
+/********************************************************************
+* Bit Masks
+*********************************************************************/
+#define BIT(x)        (1<<(x))
+#define BIT0            (0x01)
+#define BIT1            (0x02)
+#define BIT2            (0x04)
+#define BIT3            (0x08)
+#define BIT4            (0x10)
+#define BIT5            (0x20)
+#define BIT6            (0x40)
+#define BIT7            (0x80)
+#define BIT8          (0x0100)
+#define BIT9          (0x0200)
+#define BIT10         (0x0400)
+#define BIT11         (0x0800)
+#define BIT12         (0x1000)
+#define BIT13         (0x2000)
+#define BIT14         (0x4000)
+#define BIT15         (0x8000)
+#define BIT16       (0x010000UL)
+#define BIT17       (0x020000UL)
+#define BIT18       (0x040000UL)
+#define BIT19       (0x080000UL)
+#define BIT20       (0x100000UL)
+#define BIT21       (0x200000UL)
+#define BIT22       (0x400000UL)
+#define BIT23       (0x800000UL)
+#define BIT24     (0x01000000UL)
+#define BIT25     (0x02000000UL)
+#define BIT26     (0x04000000UL)
+#define BIT27     (0x08000000UL)
+#define BIT28     (0x10000000UL)
+#define BIT29     (0x20000000UL)
+#define BIT30     (0x40000000UL)
+#define BIT31     (0x80000000UL)
+
+/* a=register, b=bit number to act upon 0-n */
+#define BIT_SET(a,b) ((a) |= (1<<(b)))
+#define BIT_CLEAR(a,b) ((a) &= ~(1<<(b)))
+#define BIT_FLIP(a,b) ((a) ^= (1<<(b)))
+#define BIT_CHECK(a,b) ((a) & (1<<(b)))
+
+/* x=target variable, y=mask */
+#define BITMASK_SET(x,y) ((x) |= (y))
+#define BITMASK_CLEAR(x,y) ((x) &= (~(y)))
+#define BITMASK_FLIP(x,y) ((x) ^= (y))
+#define BITMASK_CHECK(x,y) (((x) & (y)) == (y))
+
+#ifndef _BV
+#define _BV(x) (1<<(x))
+#endif
+
+#endif