mirror of
https://github.com/reactos/reactos.git
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161 lines
5.7 KiB
C
161 lines
5.7 KiB
C
/*
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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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#ifndef BITSET_H
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#define BITSET_H
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#include "imports.h"
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/****************************************************************************
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* generic bitset implementation
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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) memcpy( (x), (y), sizeof (x) )
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#define BITSET_EQUAL(x, y) (memcmp( (x), (y), sizeof (x) ) == 0)
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#define BITSET_ZERO(x) memset( (x), 0, sizeof (x) )
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#define BITSET_ONES(x) 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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/* Get first bit set in a bitset.
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*/
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static inline int
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__bitset_ffs(const BITSET_WORD *x, int n)
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{
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int i;
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for (i = 0; i < n; i++) {
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if (x[i])
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return _mesa_ffs(x[i]) + BITSET_WORDBITS * i;
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}
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return 0;
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}
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#define BITSET_FFS(x) __bitset_ffs(x, Elements(x))
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/****************************************************************************
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* 64-bit bitset implementation
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*/
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#define BITSET64_WORD GLuint
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#define BITSET64_WORDBITS (sizeof (BITSET64_WORD) * 8)
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/* bitset declarations
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*/
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#define BITSET64_DECLARE(name, size) \
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GLuint name[2]
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/* bitset operations
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*/
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#define BITSET64_COPY(x, y) do { (x)[0] = (y)[0]; (x)[1] = (y)[1]; } while (0)
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#define BITSET64_EQUAL(x, y) ( (x)[0] == (y)[0] && (x)[1] == (y)[1] )
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#define BITSET64_ZERO(x) do { (x)[0] = 0; (x)[1] = 0; } while (0)
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#define BITSET64_ONES(x) do { (x)[0] = 0xFF; (x)[1] = 0xFF; } while (0)
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#define BITSET64_BITWORD(b) ((b) / BITSET64_WORDBITS)
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#define BITSET64_BIT(b) (1 << ((b) % BITSET64_WORDBITS))
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/* single bit operations
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*/
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#define BITSET64_TEST(x, b) ((x)[BITSET64_BITWORD(b)] & BITSET64_BIT(b))
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#define BITSET64_SET(x, b) ((x)[BITSET64_BITWORD(b)] |= BITSET64_BIT(b))
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#define BITSET64_CLEAR(x, b) ((x)[BITSET64_BITWORD(b)] &= ~BITSET64_BIT(b))
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#define BITSET64_MASK(b) ((b) == BITSET64_WORDBITS ? ~0 : BITSET64_BIT(b) - 1)
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#define BITSET64_RANGE(b, e) (BITSET64_MASK((e) + 1) & ~BITSET64_MASK(b))
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/* bit range operations
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*/
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#define BITSET64_TEST_SUBRANGE(x, b, e) \
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(BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
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((x)[BITSET64_BITWORD(b)] & BITSET64_RANGE(b, e)) : \
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(assert (!"BITSET64_TEST_RANGE: bit range crosses word boundary"), 0))
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#define BITSET64_TEST_RANGE(x, b, e) \
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(BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
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(BITSET64_TEST_SUBRANGE(x, b, e)) : \
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(BITSET64_TEST_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \
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BITSET64_TEST_SUBRANGE(x, BITSET64_WORDBITS, e)))
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#define BITSET64_SET_SUBRANGE(x, b, e) \
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(BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
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((x)[BITSET64_BITWORD(b)] |= BITSET64_RANGE(b, e)) : \
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(assert (!"BITSET64_SET_RANGE: bit range crosses word boundary"), 0))
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#define BITSET64_SET_RANGE(x, b, e) \
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(BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
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(BITSET64_SET_SUBRANGE(x, b, e)) : \
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(BITSET64_SET_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \
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BITSET64_SET_SUBRANGE(x, BITSET64_WORDBITS, e)))
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#define BITSET64_CLEAR_SUBRANGE(x, b, e) \
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(BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
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((x)[BITSET64_BITWORD(b)] &= ~BITSET64_RANGE(b, e)) : \
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(assert (!"BITSET64_CLEAR_RANGE: bit range crosses word boundary"), 0))
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#define BITSET64_CLEAR_RANGE(x, b, e) \
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(BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
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(BITSET64_CLEAR_SUBRANGE(x, b, e)) : \
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(BITSET64_CLEAR_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \
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BITSET64_CLEAR_SUBRANGE(x, BITSET64_WORDBITS, e)))
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#endif
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