Module: GBTiles::DataType

Defined in:
lib/gbtiles/data_type.rb

Class Method Summary collapse

Class Method Details

.boolean(src) ⇒ Object

BOOLEAN 1 BYTE



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# File 'lib/gbtiles/data_type.rb', line 54

def self.boolean(src)
  src.slice!(0, 1).unpack("C")[0].eql? 1
end

.boolean!(src) ⇒ Object 



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# File 'lib/gbtiles/data_type.rb', line 58

def self.boolean!(src)
  self.boolean(src.slice!(0, 1))
end

.byte(src) ⇒ Object

BYTE 1 BYTE



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# File 'lib/gbtiles/data_type.rb', line 44

def self.byte(src)
  src.slice(0, 1).unpack("C*")[0]
end

.byte!(src) ⇒ Object 



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# File 'lib/gbtiles/data_type.rb', line 48

def self.byte!(src)
  self.byte(src.slice!(0, 1))
end

.long(src) ⇒ Object

LITTLE ENDIAN 32 BIT INTEGER 4 BYTES



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# File 'lib/gbtiles/data_type.rb', line 65

def self.long(src)
  src.slice(0, 4).unpack("V*")[0]
end

.long!(src) ⇒ Object 



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# File 'lib/gbtiles/data_type.rb', line 69

def self.long!(src)
  self.long(src.slice!(0, 4))
end

.string(src, length = nil) ⇒ Object 



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# File 'lib/gbtiles/data_type.rb', line 3

def self.string(src, length = nil)
  if !length.nil? then
    string = src.slice(0, length)
  else
    string = src
  end

  if !string.nil? then
    string = string.split(/\0/).first
  end

  if !string.nil?
    string = string.unpack("A*")[0]
  end

  string
end

.string!(src, length = nil) ⇒ Object 



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# File 'lib/gbtiles/data_type.rb', line 21

def self.string!(src, length = nil)
  if !length.nil? then
    string = src.slice!(0, length)
  else 
    string = src
  end

  self.string(string, length)
end

.word(src) ⇒ Object

WORD LITTLE ENDIAN 2 BYTES



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# File 'lib/gbtiles/data_type.rb', line 34

def self.word(src)
  src.slice(0, 2).unpack("v*")[0]
end

.word!(src) ⇒ Object 



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# File 'lib/gbtiles/data_type.rb', line 38

def self.word!(src)
  self.word(src.slice!(0, 2))
end