go-hep.org/x/hep@v0.38.1/groot/riofs/memfile.go (about)

     1  // Copyright ©2018 The go-hep Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package riofs
     6  
     7  import "bytes"
     8  
     9  // RMemFile creates a simple in-memory read-only ROOT file
    10  // from the provided slice of bytes.
    11  func RMemFile(p []byte) Reader {
    12  	return &memFile{bytes.NewReader(p)}
    13  }
    14  
    15  // memFile is a simple in-memory read-only ROOT file
    16  type memFile struct {
    17  	r *bytes.Reader
    18  }
    19  
    20  func (r *memFile) Close() error                                 { return nil }
    21  func (r *memFile) Read(p []byte) (int, error)                   { return r.r.Read(p) }
    22  func (r *memFile) ReadAt(p []byte, off int64) (int, error)      { return r.r.ReadAt(p, off) }
    23  func (r *memFile) Seek(offset int64, whence int) (int64, error) { return r.r.Seek(offset, whence) }
    24  
    25  var (
    26  	_ Reader = (*memFile)(nil)
    27  )