github.com/matrixorigin/matrixone@v0.7.0/pkg/fileservice/io.go (about)

     1  // Copyright 2022 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package fileservice
    16  
    17  import "io"
    18  
    19  type readCloser struct {
    20  	r         io.Reader
    21  	closeFunc func() error
    22  }
    23  
    24  var _ io.ReadCloser = new(readCloser)
    25  
    26  func (r *readCloser) Read(data []byte) (int, error) {
    27  	return r.r.Read(data)
    28  }
    29  
    30  func (r *readCloser) Close() error {
    31  	return r.closeFunc()
    32  }
    33  
    34  type countingReader struct {
    35  	R io.Reader
    36  	N int64
    37  }
    38  
    39  var _ io.Reader = new(countingReader)
    40  
    41  func (c *countingReader) Read(data []byte) (int, error) {
    42  	n, err := c.R.Read(data)
    43  	c.N += int64(n)
    44  	return n, err
    45  }