github.com/m3db/m3@v1.5.0/src/dbnode/x/xio/null.go (about)

     1  // Copyright (c) 2016 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package xio
    22  
    23  import (
    24  	"github.com/m3db/m3/src/dbnode/ts"
    25  	"github.com/m3db/m3/src/x/pool"
    26  )
    27  
    28  type nullSegmentReader struct{}
    29  
    30  func (r nullSegmentReader) Read64() (word uint64, n byte, err error) { return 0, 0, nil }
    31  func (r nullSegmentReader) Peek64() (word uint64, n byte, err error) { return 0, 0, nil }
    32  func (r nullSegmentReader) Segment() (ts.Segment, error)     { return ts.Segment{}, nil }
    33  func (r nullSegmentReader) Reset(_ ts.Segment)               {}
    34  func (r nullSegmentReader) Finalize()                        {}
    35  func (r nullSegmentReader) Clone(
    36  	_ pool.CheckedBytesPool,
    37  ) (SegmentReader, error) {
    38  	return r, nil
    39  }