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# frozen_string_literal: true
begin
require_relative 'helper'
require 'fiddle/struct'
require 'fiddle/cparser'
rescue LoadError
end
module Fiddle
class TestCStructBuilder < TestCase
include Fiddle::CParser
def test_offsetof
types, members = parse_struct_signature(['int64_t i','char c'])
my_struct = Fiddle::CStructBuilder.create(Fiddle::CStruct, types, members)
assert_equal 0, my_struct.offsetof("i")
assert_equal Fiddle::SIZEOF_INT64_T, my_struct.offsetof("c")
end
def test_offset_with_gap
types, members = parse_struct_signature(['void *p', 'char c', 'long x'])
my_struct = Fiddle::CStructBuilder.create(Fiddle::CStruct, types, members)
assert_equal PackInfo.align(0, ALIGN_VOIDP), my_struct.offsetof("p")
assert_equal PackInfo.align(SIZEOF_VOIDP, ALIGN_CHAR), my_struct.offsetof("c")
assert_equal SIZEOF_VOIDP + PackInfo.align(SIZEOF_CHAR, ALIGN_LONG), my_struct.offsetof("x")
end
def test_union_offsetof
types, members = parse_struct_signature(['int64_t i','char c'])
my_struct = Fiddle::CStructBuilder.create(Fiddle::CUnion, types, members)
assert_equal 0, my_struct.offsetof("i")
assert_equal 0, my_struct.offsetof("c")
end
end
end if defined?(Fiddle)
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