Class: Gitrb::Pack

Inherits:
Object
  • Object
show all
Defined in:
lib/gitrb/pack.rb

Constant Summary collapse

OBJ_OFS_DELTA = 
6
OBJ_REF_DELTA = 
7
FanOutCount = 
256
SHA1Size = 
20
IdxOffsetSize = 
4
OffsetSize = 
4
CrcSize = 
4
OffsetStart = 
FanOutCount * IdxOffsetSize
SHA1Start = 
OffsetStart + OffsetSize
EntrySize = 
OffsetSize + SHA1Size
EntrySizeV2 = 
SHA1Size + CrcSize + OffsetSize

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ Pack

Returns a new instance of Pack.



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# File 'lib/gitrb/pack.rb', line 60

def initialize(file)
  file = file[0...-3] + 'pack' if file =~ /\.idx$/
  @name = file
  init_pack
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/gitrb/pack.rb', line 58

def name
  @name
end

Instance Method Details

#each_object ⇒ Object 



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# File 'lib/gitrb/pack.rb', line 66

def each_object
  with_idx do |idx|
    if @version == 2
      data = read_data_v2(idx)
      data.each do |sha1, crc, offset|
        sha1 = sha1.unpack("H*").first
        yield sha1, offset
      end
    else
      pos = OffsetStart
      @size.times do
        offset = idx[pos,OffsetSize].unpack('N')[0]
        sha1 = idx[pos+OffsetSize,SHA1Size]
        pos += EntrySize
        sha1 = sha1.unpack("H*").first
        yield sha1, offset
      end
    end
  end
end

#get_object(offset) ⇒ Object 



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# File 'lib/gitrb/pack.rb', line 87

def get_object(offset)
  data, type = with_pack do |packfile|
    unpack_object(packfile, offset)
  end
  [data, OBJ_TYPES[type]]
end