Module: Yadriggy::C::CFI

Defined in:
lib/yadriggy/c/ffi.rb

Overview

C Function Interface

Class Method Summary collapse

Class Method Details

.c_type(type) ⇒ Symbol

Returns type name for FFI.

Parameters:

Returns:

  • (Symbol) —

    type name for FFI



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# File 'lib/yadriggy/c/ffi.rb', line 282

def self.c_type(type)
  type = type.supertype if InstanceType.role(type)
  if type == RubyClass::Integer || type == Integer
    :int32
  elsif type == RubyClass::Float || type == Float
    :double
  elsif type == CType::Void
    :void
  elsif type == RubyClass::String || type == String
    :string
  elsif type == CType::Float32Type || type == CType::Float32
    :float
  else
    raise "bad type #{type}" if ArrayType.role(type).nil?
    :pointer
  end
end

.c_type_name(type) ⇒ String

Returns type name in C.

Parameters:

Returns:

  • (String) —

    type name in C.



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# File 'lib/yadriggy/c/ffi.rb', line 261

def self.c_type_name(type)
  type = type.supertype if InstanceType.role(type)
  if type == RubyClass::Integer || type == Integer
    'int32_t'
  elsif type == RubyClass::Float || type == Float
    'double'
  elsif type == CType::Void
    'void'
  elsif type == RubyClass::String || type == String
    'char*'
  elsif type == CType::Float32Type || type == CType::Float32
    'float'
  else
    at = ArrayType.role(type)
    raise "bad type #{type.inspect}" if at.nil?
    "#{c_type_name(at.element_type)}*"
  end
end

.param_types(method_type) ⇒ Object 



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# File 'lib/yadriggy/c/ffi.rb', line 249

def self.param_types(method_type)
  method_type.params.map do |t|
    c_type(t)
  end
end

.return_type(method_type) ⇒ Object 



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# File 'lib/yadriggy/c/ffi.rb', line 255

def self.return_type(method_type)
  c_type(method_type.result_type)
end