Class: SQLAnywhere::BindParam

Inherits:
FFI::Struct
  • Object
show all
Defined in:
lib/bind_param.rb

Instance Method Summary collapse

Instance Method Details

#get_direction ⇒ Object 



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# File 'lib/bind_param.rb', line 15

def get_direction
  self[:direction]
end

#get_name ⇒ Object 



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# File 'lib/bind_param.rb', line 11

def get_name
  self[:name]
end

#inspect ⇒ Object 



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# File 'lib/bind_param.rb', line 23

def inspect
  "<#{self.class} direction: #{self[:direction]}, name: #{self[:name]}, value: #{self[:value].inspect}>"
end

#set_direction(d) ⇒ Object 



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# File 'lib/bind_param.rb', line 19

def set_direction d
  self[:direction] = d
end

#set_value(value) ⇒ Object 



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# File 'lib/bind_param.rb', line 27

def set_value(value)

  self[:value][:is_null] = FFI::MemoryPointer.new(SQLAnywhere::Bool, 1, true)

  if self[:direction] == :input

    case value
    when String
      self[:value][:length] = FFI::MemoryPointer.new(SQLAnywhere::SIZE_T, 1, false)
      length = value.bytesize
      SQLAnywhere.write_size_t(self[:value][:length], length)
      self[:value][:buffer] = FFI::MemoryPointer.new(:char, length + 1, false)

      self[:value][:buffer].put_string(0, value)
      self[:value][:type] = :string
    when Fixnum
      self[:value][:buffer] = FFI::MemoryPointer.new(:long, 1, false)
      self[:value][:type] = :val64
      byte_array = [value].pack('q')
      byte_array.each_byte.each_with_index do |b, offset|
        self[:value][:buffer].put_char(offset, b)
      end
    when Bignum
      self[:value][:buffer] = FFI::MemoryPointer.new(:long_long, 1, false)
      self[:value][:type] = :val64
      byte_array = [value].pack('Q')
      byte_array.each_byte.each_with_index do |b, offset|
        self[:value][:buffer].put_char(offset, b)
      end
    when Float
      self[:value][:buffer] = FFI::MemoryPointer.new(:double, 1, false)
      self[:value][:buffer].write_double(value)
      self[:value][:type] = :double
    when nil
      self[:value][:is_null].write_int(1)
      self[:value][:buffer] = FFI::MemoryPointer.new(:int, 1, false)
      self[:value][:type] = :val32
    else
      raise "Cannot convert type (#{value.class}). Must be STRING, FIXNUM, BIGNUM, FLOAT, or NIL"
    end

  else
    self[:value][:buffer] = FFI::MemoryPointer.new(:char,
      case self[:value][:type]
      when :string
        self[:value][:buffer_size]
      when :double
        FFI::Type::FLOAT.size # Is this right? it's what the old code does
      when :val64, :uval64
        FFI::Type::LONG_LONG.size
      when :val32, :uval32
        FFI::Type::INT.size
      when :val16, :uval16
        FFI::Type::SHORT.size
      when :val8, :uval8
        FFI::Type::CHAR.size
      else
        raise "Type unknown (#{self[:value][:type]})"
      end
      )
      
  end
  nil
end