Bit set.
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/*
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* Mesa 3-D graphics library
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* Version: 6.5
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*
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* Copyright (C) 2006 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to 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, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file bitset.h
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* \brief Bitset of arbitrary size definitions.
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* \author Michal Krol
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*/
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#define BITSET_WORD GLuint
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#define BITSET_WORDBITS (sizeof (BITSET_WORD) * 8)
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/* bitset declarations
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*/
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#define BITSET_DECLARE(name, size) \
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BITSET_WORD name[((size) + BITSET_WORDBITS - 1) / BITSET_WORDBITS]
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/* bitset operations
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*/
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#define BITSET_COPY(x, y) _mesa_memcpy( (x), (y), sizeof (x) )
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#define BITSET_EQUAL(x, y) (_mesa_memcmp( (x), (y), sizeof (x) ) == 0)
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#define BITSET_ZERO(x) _mesa_memset( (x), 0, sizeof (x) )
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#define BITSET_ONES(x) _mesa_memset( (x), 0xff, sizeof (x) )
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#define BITSET_BITWORD(b) ((b) / BITSET_WORDBITS)
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#define BITSET_BIT(b) (1 << ((b) % BITSET_WORDBITS))
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/* single bit operations
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*/
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#define BITSET_TEST(x, b) ((x)[BITSET_BITWORD(b)] & BITSET_BIT(b))
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#define BITSET_SET(x, b) ((x)[BITSET_BITWORD(b)] |= BITSET_BIT(b))
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#define BITSET_CLEAR(x, b) ((x)[BITSET_BITWORD(b)] &= ~BITSET_BIT(b))
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#define BITSET_MASK(b) ((b) == BITSET_WORDBITS ? ~0 : BITSET_BIT(b) - 1)
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#define BITSET_RANGE(b, e) (BITSET_MASK((e) + 1) & ~BITSET_MASK(b))
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/* bit range operations
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*/
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#define BITSET_TEST_RANGE(x, b, e) \
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(BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
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((x)[BITSET_BITWORD(b)] & BITSET_RANGE(b, e)) : \
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(assert (!"BITSET_TEST_RANGE: bit range crosses word boundary"), 0))
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#define BITSET_SET_RANGE(x, b, e) \
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(BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
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((x)[BITSET_BITWORD(b)] |= BITSET_RANGE(b, e)) : \
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(assert (!"BITSET_SET_RANGE: bit range crosses word boundary"), 0))
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#define BITSET_CLEAR_RANGE(x, b, e) \
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(BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
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((x)[BITSET_BITWORD(b)] &= ~BITSET_RANGE(b, e)) : \
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(assert (!"BITSET_CLEAR_RANGE: bit range crosses word boundary"), 0))
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