[1] | 1 | /* |
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| 2 | * bits.c - bits manipulation functions implementation |
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| 3 | * |
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| 4 | * Author Ghassan Almaless (2008,2009,2010,2011,2012) |
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| 5 | * Alain Greiner (2016) |
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| 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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[457] | 25 | #include <hal_kernel_types.h> |
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[1] | 26 | #include <bits.h> |
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| 27 | |
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[23] | 28 | //////////////////////////////////// |
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| 29 | void bitmap_init( bitmap_t * bitmap, |
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| 30 | uint32_t len ) |
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| 31 | { |
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| 32 | uint32_t word; |
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| 33 | uint32_t nwords = BITMAP_SIZE( len ); |
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| 34 | for( word = 0 ; word < nwords ; word++ ) |
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| 35 | { |
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| 36 | bitmap[word] = 0; |
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| 37 | } |
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| 38 | } // end bitmap_init() |
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| 39 | |
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[1] | 40 | ////////////////////////////////////////// |
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| 41 | inline void bitmap_set( bitmap_t * bitmap, |
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| 42 | uint32_t index ) |
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| 43 | { |
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| 44 | uint32_t word = index / 32; |
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| 45 | uint32_t bit = index % 32; |
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| 46 | |
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| 47 | bitmap[word] |= ( 1 << bit ); |
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| 48 | } |
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| 49 | |
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| 50 | //////////////////////////////////////////// |
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| 51 | inline void bitmap_clear( bitmap_t * bitmap, |
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| 52 | uint32_t index ) |
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| 53 | { |
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| 54 | uint32_t word = index / 32; |
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| 55 | uint32_t bit = index % 32; |
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| 56 | |
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| 57 | bitmap[word] &= ~( 1 << bit ); |
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| 58 | } |
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| 59 | |
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| 60 | ////////////////////////////////////////////// |
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| 61 | inline bool_t bitmap_state( bitmap_t * bitmap, |
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| 62 | uint32_t index ) |
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| 63 | { |
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| 64 | uint32_t word = index / 32; |
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| 65 | uint32_t bit = index % 32; |
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| 66 | |
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[351] | 67 | return (bitmap[word] & ( 1 << bit )) != 0; |
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[1] | 68 | } |
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| 69 | |
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| 70 | ////////////////////////////////////////// |
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| 71 | void bitmap_set_range( bitmap_t * bitmap, |
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| 72 | uint32_t index, |
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| 73 | uint32_t len ) |
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| 74 | { |
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| 75 | uint32_t val; |
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| 76 | uint32_t word = index / 32; |
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| 77 | uint32_t bit = index % 32; |
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| 78 | |
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| 79 | while((len > 0)) |
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| 80 | { |
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| 81 | if((len + bit) >= 32) |
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| 82 | { |
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| 83 | val = (bit == 0) ? 0xFFFFFFFF : (1 << (32 - bit)) - 1; |
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| 84 | bitmap[word] |= (val << bit); |
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| 85 | word++; |
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| 86 | len -= (32 - bit); |
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| 87 | bit = 0; |
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| 88 | } |
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| 89 | else |
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| 90 | { |
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| 91 | bitmap[word] |= (((1 << len ) - 1) << bit); |
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| 92 | break; |
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| 93 | } |
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| 94 | } |
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[11] | 95 | } // bitmap_set_range() |
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[1] | 96 | |
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| 97 | /////////////////////////////////////////// |
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| 98 | void bitmap_clear_range( bitmap_t * bitmap, |
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| 99 | uint32_t index, |
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| 100 | uint32_t len ) |
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| 101 | { |
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| 102 | uint32_t val; |
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| 103 | uint32_t word = index / 32; |
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| 104 | uint32_t bit = index % 32; |
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| 105 | |
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| 106 | while((len > 0)) |
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| 107 | { |
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| 108 | if((len + bit) >= 32) |
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| 109 | { |
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| 110 | val = (bit == 0) ? 0xFFFFFFFF : (1 << (32 - bit)) - 1; |
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| 111 | bitmap[word] &= ~(val << bit); |
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| 112 | word++; |
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| 113 | len -= (32 - bit); |
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| 114 | bit = 0; |
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| 115 | } |
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| 116 | else |
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| 117 | { |
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| 118 | bitmap[word] &= ~(((1 << len ) - 1) << bit); |
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| 119 | break; |
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| 120 | } |
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| 121 | } |
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[11] | 122 | } // bitmap_clear_range() |
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[1] | 123 | |
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| 124 | /////////////////////////////////////// |
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| 125 | uint32_t bitmap_ffs2( bitmap_t * bitmap, |
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| 126 | uint32_t index, |
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| 127 | uint32_t size ) |
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| 128 | { |
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[11] | 129 | uint32_t max_word; |
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[1] | 130 | uint32_t word = index / 32; |
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| 131 | uint32_t bit = index % 32; |
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| 132 | |
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[11] | 133 | if( index < size ) |
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| 134 | { |
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| 135 | if( bit != 0 ) |
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| 136 | { |
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| 137 | for( ; bit < 32; bit++) |
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| 138 | { |
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| 139 | if((bitmap[word] & (1 << bit)) ) return (word*32 + bit); |
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| 140 | } |
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| 141 | word++; |
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| 142 | } |
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[1] | 143 | |
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[11] | 144 | max_word = ( (size-1) >>5 ) + 1; |
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| 145 | |
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| 146 | for( ; word < max_word ; word++ ) |
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| 147 | { |
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| 148 | if(bitmap[word] != 0) |
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| 149 | { |
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| 150 | for(bit = 0 ; bit < 32 ; bit++) |
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| 151 | { |
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| 152 | if( bitmap[word] & (1 << bit) ) return (word*32 + bit); |
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| 153 | } |
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| 154 | } |
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[1] | 155 | } |
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| 156 | } |
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| 157 | |
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[11] | 158 | return -1; |
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| 159 | |
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| 160 | } // bitmap_ffs2() |
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| 161 | |
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[1] | 162 | /////////////////////////////////////// |
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| 163 | uint32_t bitmap_ffc2( bitmap_t * bitmap, |
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| 164 | uint32_t index, |
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| 165 | uint32_t size ) |
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| 166 | { |
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[11] | 167 | uint32_t max_word; |
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[1] | 168 | uint32_t word = index / 32; |
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| 169 | uint32_t bit = index % 32; |
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[11] | 170 | |
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| 171 | if( index < size ) |
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| 172 | { |
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| 173 | if( bit != 0 ) |
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| 174 | { |
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| 175 | for( ; bit < 32; bit++) |
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| 176 | { |
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| 177 | if( (bitmap[word] & (1 << bit)) == 0) return (word*32 + bit); |
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| 178 | } |
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| 179 | word++; |
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| 180 | } |
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[1] | 181 | |
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[11] | 182 | max_word = ( (size-1) >>5 ) + 1; |
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| 183 | |
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| 184 | for( ; word < max_word ; word++ ) |
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| 185 | { |
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| 186 | if(bitmap[word] != 0xFFFFFFFF) |
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| 187 | { |
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| 188 | for(bit = 0 ; bit < 32 ; bit++) |
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| 189 | { |
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| 190 | if( (bitmap[word] & (1 << bit)) == 0 ) return (word*32 + bit); |
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| 191 | } |
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| 192 | } |
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[1] | 193 | } |
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| 194 | } |
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| 195 | |
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[11] | 196 | return -1; |
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| 197 | |
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| 198 | } // bitmap_ffc2() |
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| 199 | |
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[1] | 200 | ////////////////////////////////////// |
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| 201 | uint32_t bitmap_ffs( bitmap_t * bitmap, |
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| 202 | uint32_t size ) |
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| 203 | { |
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[11] | 204 | uint32_t max_word; |
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[1] | 205 | uint32_t word; |
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| 206 | uint32_t bit; |
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[11] | 207 | |
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| 208 | if( size ) |
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| 209 | { |
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| 210 | max_word = ( (size-1) >>5 ) + 1; |
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| 211 | |
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| 212 | for( word = 0 ; word < max_word ; word++ ) |
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| 213 | { |
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| 214 | if(bitmap[word] != 0) |
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| 215 | { |
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| 216 | for(bit = 0 ; bit < 32 ; bit++) |
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| 217 | { |
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| 218 | if( bitmap[word] & (1 << bit) ) return (word*32 + bit); |
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| 219 | } |
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| 220 | } |
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[1] | 221 | } |
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| 222 | } |
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| 223 | |
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[11] | 224 | return -1; |
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| 225 | |
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| 226 | } // bitmap_ffs() |
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| 227 | |
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[1] | 228 | ////////////////////////////////////// |
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| 229 | uint32_t bitmap_ffc( bitmap_t * bitmap, |
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| 230 | uint32_t size ) |
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| 231 | { |
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[11] | 232 | uint32_t max_word; |
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[1] | 233 | uint32_t word; |
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| 234 | uint32_t bit; |
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| 235 | |
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[11] | 236 | if( size ) |
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| 237 | { |
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| 238 | max_word = ( (size-1) >>5 ) + 1; |
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| 239 | |
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| 240 | for( word = 0 ; word < max_word ; word++ ) |
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| 241 | { |
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| 242 | if(bitmap[word] != 0XFFFFFFFF) |
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| 243 | { |
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| 244 | for(bit = 0 ; bit < 32 ; bit++) |
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| 245 | { |
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| 246 | if( (bitmap[word] & (1 << bit)) == 0 ) return (word*32 + bit); |
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| 247 | } |
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| 248 | } |
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[1] | 249 | } |
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| 250 | } |
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| 251 | |
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[11] | 252 | return -1; |
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| 253 | |
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| 254 | } // bitmap_ffc() |
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| 255 | |
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