Class: Grit::GitRuby::Internal::FileWindow

Inherits:
Object
  • Object
show all
Defined in:
lib/grit/git-ruby/internal/file_window.rb

Instance Method Summary collapse

Constructor Details

#initialize(file, version = 1) ⇒ FileWindow



16
17
18
19
20
21
22
23
24
# File 'lib/grit/git-ruby/internal/file_window.rb', line 16

def initialize(file, version = 1)
  @file = file
  @offset = nil
  if version == 2
    @global_offset = 8
  else
    @global_offset = 0
  end
end

Instance Method Details

#[](*idx) ⇒ Object



30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
# File 'lib/grit/git-ruby/internal/file_window.rb', line 30

def [](*idx)
  idx = idx[0] if idx.length == 1
  case idx
  when Range
    offset = idx.first
    len = idx.last - idx.first + idx.exclude_end? ? 0 : 1
  when Fixnum
    offset = idx
    len = nil
  when Array
    offset, len = idx
  else
    raise RuntimeError, "invalid index param: #{idx.class}"
  end
  if @offset != offset
    @file.seek(offset + @global_offset)
  end
  @offset = offset + len ? len : 1
  if not len
    @file.read(1).getord(0)
  else
    @file.read(len)
  end
end

#unmapObject



26
27
28
# File 'lib/grit/git-ruby/internal/file_window.rb', line 26

def unmap
  @file = nil
end