Class: Sybase::ColumnData

Inherits:
Object
  • Object
show all
Defined in:
lib/sybase/structs/column_data.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ColumnData

Returns a new instance of ColumnData.



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# File 'lib/sybase/structs/column_data.rb', line 5

def initialize
  @pointer = nil
  @type = nil
  @format = DataFormat.new
end

Instance Attribute Details

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/sybase/structs/column_data.rb', line 3

def format
  @format
end

#pointer ⇒ Object (readonly)

Returns the value of attribute pointer.



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# File 'lib/sybase/structs/column_data.rb', line 3

def pointer
  @pointer
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/sybase/structs/column_data.rb', line 3

def type
  @type
end

Instance Method Details

#char_pointer!(size = 256) ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 15

def char_pointer!(size = 256)
  @type = :char
  @pointer = FFI::MemoryPointer.new(@type, size)
end

#double_pointer! ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 25

def double_pointer!
  @type = :double
  @pointer = FFI::MemoryPointer.new(@type)
end

#indicator ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 42

def indicator
  indicator_pointer.read_int
end

#indicator_pointer ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 34

def indicator_pointer
  @indicator_ptr ||= FFI::MemoryPointer.new(:int)
end

#inspect ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 11

def inspect
  "#<#{self.class}:0x#{(hash*2).to_s(16)} type=#{type.inspect} valuelen=#{valuelen} indicator=#{indicator}>"
end

#int_pointer! ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 20

def int_pointer!
  @type = :int
  @pointer = FFI::MemoryPointer.new(@type)
end

#value ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 46

def value
  case @type
  when :int
    @pointer.read_int
  when :char
    @pointer.get_bytes(0, valuelen - 1)
  when :double
    @pointer.read_double
  else
    raise Error, "uknown type #{type}"
  end
end

#valuelen ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 38

def valuelen
  valuelen_pointer.read_int
end

#valuelen_pointer ⇒ Object 



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# File 'lib/sybase/structs/column_data.rb', line 30

def valuelen_pointer
  @valuelen_ptr ||= FFI::MemoryPointer.new(:int)
end