github.com/segmentio/parquet-go@v0.0.0-20230712180008-5d42db8f0d47/bloom/block.go (about)

     1  package bloom
     2  
     3  import "unsafe"
     4  
     5  // Word represents 32 bits words of bloom filter blocks.
     6  type Word uint32
     7  
     8  // Block represents bloom filter blocks which contain eight 32 bits words.
     9  type Block [8]Word
    10  
    11  // Bytes returns b as a byte slice.
    12  func (b *Block) Bytes() []byte {
    13  	return unsafe.Slice((*byte)(unsafe.Pointer(b)), BlockSize)
    14  }
    15  
    16  const (
    17  	// BlockSize is the size of bloom filter blocks in bytes.
    18  	BlockSize = 32
    19  
    20  	salt0 = 0x47b6137b
    21  	salt1 = 0x44974d91
    22  	salt2 = 0x8824ad5b
    23  	salt3 = 0xa2b7289d
    24  	salt4 = 0x705495c7
    25  	salt5 = 0x2df1424b
    26  	salt6 = 0x9efc4947
    27  	salt7 = 0x5c6bfb31
    28  )