src/mesa/main/bitset.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file bitset.h
  27  * \brief Bitset of arbitrary size definitions.
  28  * \author Michal Krol
  29  */
  30
  31 /****************************************************************************
  32  * generic bitset implementation
  33  */
  34
  35 #define BITSET_WORD GLuint
  36 #define BITSET_WORDBITS (sizeof (BITSET_WORD) * 8)
  37
  38 /* bitset declarations
  39  */
  40 #define BITSET_DECLARE(name, size) \
  41    BITSET_WORD name[((size) + BITSET_WORDBITS - 1) / BITSET_WORDBITS]
  42
  43 /* bitset operations
  44  */
  45 #define BITSET_COPY(x, y) _mesa_memcpy( (x), (y), sizeof (x) )
  46 #define BITSET_EQUAL(x, y) (_mesa_memcmp( (x), (y), sizeof (x) ) == 0)
  47 #define BITSET_ZERO(x) _mesa_memset( (x), 0, sizeof (x) )
  48 #define BITSET_ONES(x) _mesa_memset( (x), 0xff, sizeof (x) )
  49
  50 #define BITSET_BITWORD(b) ((b) / BITSET_WORDBITS)
  51 #define BITSET_BIT(b) (1 << ((b) % BITSET_WORDBITS))
  52
  53 /* single bit operations
  54  */
  55 #define BITSET_TEST(x, b) ((x)[BITSET_BITWORD(b)] & BITSET_BIT(b))
  56 #define BITSET_SET(x, b) ((x)[BITSET_BITWORD(b)] |= BITSET_BIT(b))
  57 #define BITSET_CLEAR(x, b) ((x)[BITSET_BITWORD(b)] &= ~BITSET_BIT(b))
  58
  59 #define BITSET_MASK(b) ((b) == BITSET_WORDBITS ? ~0 : BITSET_BIT(b) - 1)
  60 #define BITSET_RANGE(b, e) (BITSET_MASK((e) + 1) & ~BITSET_MASK(b))
  61
  62 /* bit range operations
  63  */
  64 #define BITSET_TEST_RANGE(x, b, e) \
  65    (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
  66    ((x)[BITSET_BITWORD(b)] & BITSET_RANGE(b, e)) : \
  67    (assert (!"BITSET_TEST_RANGE: bit range crosses word boundary"), 0))
  68 #define BITSET_SET_RANGE(x, b, e) \
  69    (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
  70    ((x)[BITSET_BITWORD(b)] |= BITSET_RANGE(b, e)) : \
  71    (assert (!"BITSET_SET_RANGE: bit range crosses word boundary"), 0))
  72 #define BITSET_CLEAR_RANGE(x, b, e) \
  73    (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
  74    ((x)[BITSET_BITWORD(b)] &= ~BITSET_RANGE(b, e)) : \
  75    (assert (!"BITSET_CLEAR_RANGE: bit range crosses word boundary"), 0))
  76
  77 /****************************************************************************
  78  * 64-bit bitset implementation
  79  */
  80
  81 #define BITSET64_WORD GLuint
  82 #define BITSET64_WORDBITS (sizeof (BITSET64_WORD) * 8)
  83
  84 /* bitset declarations
  85  */
  86 #define BITSET64_DECLARE(name, size) \
  87    GLuint name[2]
  88
  89 /* bitset operations
  90  */
  91 #define BITSET64_COPY(x, y) do { (x)[0] = (y)[0]; (x)[1] = (y)[1]; } while (0)
  92 #define BITSET64_EQUAL(x, y) ( (x)[0] == (y)[0] && (x)[1] == (y)[1] )
  93 #define BITSET64_ZERO(x) do { (x)[0] = 0; (x)[1] = 0; } while (0)
  94 #define BITSET64_ONES(x) do { (x)[0] = 0xFF; (x)[1] = 0xFF; } while (0)
  95
  96 #define BITSET64_BITWORD(b) ((b) / BITSET64_WORDBITS)
  97 #define BITSET64_BIT(b) (1 << ((b) % BITSET64_WORDBITS))
  98
  99 /* single bit operations
 100  */
 101 #define BITSET64_TEST(x, b) ((x)[BITSET64_BITWORD(b)] & BITSET64_BIT(b))
 102 #define BITSET64_SET(x, b) ((x)[BITSET64_BITWORD(b)] |= BITSET64_BIT(b))
 103 #define BITSET64_CLEAR(x, b) ((x)[BITSET64_BITWORD(b)] &= ~BITSET64_BIT(b))
 104
 105 #define BITSET64_MASK(b) ((b) == BITSET64_WORDBITS ? ~0 : BITSET64_BIT(b) - 1)
 106 #define BITSET64_RANGE(b, e) (BITSET64_MASK((e) + 1) & ~BITSET64_MASK(b))
 107
 108 /* bit range operations
 109  */
 110 #define BITSET64_TEST_RANGE(x, b, e) \
 111    (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
 112    ((x)[BITSET64_BITWORD(b)] & BITSET64_RANGE(b, e)) : \
 113    (assert (!"BITSET64_TEST_RANGE: bit range crosses word boundary"), 0))
 114 #define BITSET64_SET_RANGE(x, b, e) \
 115    (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
 116    ((x)[BITSET64_BITWORD(b)] |= BITSET64_RANGE(b, e)) : \
 117    (assert (!"BITSET64_SET_RANGE: bit range crosses word boundary"), 0))
 118 #define BITSET64_CLEAR_RANGE(x, b, e) \
 119    (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
 120    ((x)[BITSET64_BITWORD(b)] &= ~BITSET64_RANGE(b, e)) : \
 121    (assert (!"BITSET64_CLEAR_RANGE: bit range crosses word boundary"), 0))
 122