39 lines
734 B
C
39 lines
734 B
C
#pragma once
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#include <stddef.h>
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#include <stdint.h>
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inline void bitmap_set( uint32_t* map , int index )
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{
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map[index/32] |= (1 << (index % 32));
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}
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inline void bitmap_unset(uint32_t* map , int index)
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{
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map[index/32] &= ~(1 << (index % 32));
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}
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inline uint32_t bitmap_first_unset( uint32_t* map , int map_size)
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{
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for ( int i = 0 ; i < map_size ; i ++ )
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{
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// a bit or more is set within this byte!
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if( (map[i] & 0xFFFFFFFF) > 0 ){
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// which bit is set?
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for(int j = 0 ; j < 32 ; j++){
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if ( (map[i] & (0x00000001 << j)) > 0)
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{
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return (i*32)+j;
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}
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}
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}
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}
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return -1;
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}
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