Class: Rubex::DataType::CPtr

Inherits:
Object
  • Object
show all
Includes:
Helpers
Defined in:
lib/rubex/data_type/c_ptr.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Helpers

#==, #c_function_ptr?, #char_ptr?

Constructor Details

#initialize(type) ⇒ CPtr

Returns a new instance of CPtr.



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# File 'lib/rubex/data_type/c_ptr.rb', line 8

def initialize(type)
  @type = type
end

Instance Attribute Details

#type ⇒ Object (readonly)

The data type that this pointer is pointing to.



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# File 'lib/rubex/data_type/c_ptr.rb', line 6

def type
  @type
end

Instance Method Details

#<=>(_other) ⇒ Object 



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# File 'lib/rubex/data_type/c_ptr.rb', line 66

def <=>(_other)
  -1
end

#base_type ⇒ Object 



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# File 'lib/rubex/data_type/c_ptr.rb', line 39

def base_type
  return @type unless @type.is_a?(self.class)
  @type.base_type
end

#cptr? ⇒ Boolean

Returns:



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# File 'lib/rubex/data_type/c_ptr.rb', line 16

def cptr?
  true
end

#from_ruby_object(arg) ⇒ Object

from a Ruby function get a pointer to some value.



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# File 'lib/rubex/data_type/c_ptr.rb', line 56

def from_ruby_object(arg)
  return "StringValueCStr(#{arg})" if @type.char?
  arg
end

#p_formatter ⇒ Object 



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# File 'lib/rubex/data_type/c_ptr.rb', line 12

def p_formatter
  '%s' if char_ptr?
end

#ptr_level ⇒ Object 



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# File 'lib/rubex/data_type/c_ptr.rb', line 44

def ptr_level
  temp = @type
  ptr = '*'
  while temp.cptr?
    ptr << '*'
    temp = @type.type
  end

  ptr
end

#to_ruby_object(arg) ⇒ Object 



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# File 'lib/rubex/data_type/c_ptr.rb', line 61

def to_ruby_object(arg)
  return "rb_str_new2(#{arg})" if @type.char?
  arg
end

#to_s ⇒ Object 



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# File 'lib/rubex/data_type/c_ptr.rb', line 20

def to_s
  base_type = @type.base_type
  if base_type.c_function?
    ptr = ptr_level

    str = "#{base_type.type} (#{ptr} #{base_type.c_name})"
    str << '(' + base_type.arg_list.map { |e| e.type.to_s }.join(',') + ')'
  else
    t = @type
    str = '*'
    if t.cptr?
      str << '*'
      t = t.type
    end
    str.prepend t.to_s
    str
  end
end