Class: Zip::ZipExtraField

Inherits:
Hash show all
Defined in:
lib/zip/zip.rb

Defined Under Namespace

Classes: Generic, IUnix, UniversalTime

Constant Summary collapse

ID_MAP =
{}

Instance Method Summary collapse

Methods inherited from Hash

file, #ids, #rwd_table, #save, #subset, #to_i

Constructor Details

#initialize(binstr = nil) ⇒ ZipExtraField

start main of ZipExtraField < Hash


1292
1293
1294
# File 'lib/zip/zip.rb', line 1292

def initialize(binstr = nil)
  binstr and merge(binstr)
end

Instance Method Details

#c_dir_lengthObject Also known as: c_dir_size


1360
1361
1362
# File 'lib/zip/zip.rb', line 1360

def c_dir_length
  to_c_dir_bin.length
end

#create(name) ⇒ Object


1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
# File 'lib/zip/zip.rb', line 1329

def create(name)
  field_class = nil
  ID_MAP.each { |id, klass|
    if klass.name == name
      field_class = klass
      break
    end
  }
  if ! field_class
	raise ZipError, "Unknown extra field '#{name}'"
  end
  self[name] = field_class.new()
end

#local_lengthObject Also known as: local_size, length, size


1363
1364
1365
# File 'lib/zip/zip.rb', line 1363

def local_length
  to_local_bin.length
end

#merge(binstr) ⇒ Object


1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
# File 'lib/zip/zip.rb', line 1296

def merge(binstr)
  binstr == "" and return
  i = 0 
  while i < binstr.length
    id = binstr[i,2]
    len = binstr[i+2,2].to_s.unpack("v")[0] 
    if id && ID_MAP.member?(id)
      field_name = ID_MAP[id].name
      if self.member?(field_name)
        self[field_name].mergea(binstr[i, len+4])
      else
        field_obj = ID_MAP[id].new(binstr[i, len+4])
        self[field_name] = field_obj
      end
    elsif id
      unless self["Unknown"]
        s = ""
        class << s
          alias_method :to_c_dir_bin, :to_s
          alias_method :to_local_bin, :to_s
        end
        self["Unknown"] = s
      end
      if ! len || len+4 > binstr[i..-1].length
        self["Unknown"] << binstr[i..-1]
        break;
      end
      self["Unknown"] << binstr[i, len+4]
    end
    i += len+4
  end
end

#to_c_dir_binObject


1352
1353
1354
1355
1356
1357
1358
# File 'lib/zip/zip.rb', line 1352

def to_c_dir_bin
  s = ""
  each { |k, v|
    s << v.to_c_dir_bin
  }
  s
end

#to_local_binObject Also known as: to_s


1343
1344
1345
1346
1347
1348
1349
# File 'lib/zip/zip.rb', line 1343

def to_local_bin
  s = ""
  each { |k, v|
    s << v.to_local_bin
  }
  s
end