github.com/scottcagno/storage@v1.8.0/pkg/_bio/block.go (about)

     1  package _bio
     2  
     3  import (
     4  	"errors"
     5  	"io"
     6  )
     7  
     8  const (
     9  	blockSize = 16
    10  	chunkSize = 16 * blockSize
    11  )
    12  
    13  type block [blockSize]byte
    14  type chunk [chunkSize]byte
    15  
    16  var (
    17  	ErrNilPointer = errors.New("nil pointer")
    18  	ErrBadSize    = errors.New("bad size")
    19  )
    20  
    21  type blockReader struct {
    22  	io.ReadWriteSeeker
    23  }
    24  
    25  func newBlockReader(writer io.ReadWriteSeeker) *blockReader {
    26  	return &blockReader{}
    27  }
    28  
    29  func (br *blockReader) Read(p []byte) (int, error) {
    30  	if p == nil {
    31  		return -1, ErrNilPointer
    32  	}
    33  	if len(p) != blockSize {
    34  		return -1, ErrBadSize
    35  	}
    36  	// ??
    37  	return 0, nil
    38  }
    39  
    40  func (br *blockReader) Write(p []byte) (int, error) {
    41  	return 0, nil
    42  }
    43  
    44  func (br *blockReader) Seek(off int64, whence int) (int64, error) {
    45  	return 0, nil
    46  }