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# frozen_string_literal: true
begin
require_relative 'helper'
require 'fiddle/struct'
require 'fiddle/cparser'
require 'fiddle/import'
rescue LoadError
end
module Fiddle
class TestCStructBuilder < TestCase
include Fiddle::CParser
extend Fiddle::Importer
RBasic = struct ['void * flags',
'void * klass' ]
RObject = struct [
{ 'basic' => RBasic },
{ 'as' => union([
{ 'heap'=> struct([ 'uint32_t numiv',
'void * ivptr',
'void * iv_index_tbl' ]) },
'void *ary[3]' ])}
]
def test_basic_embedded_members
assert_equal 0, RObject.offsetof("basic.flags")
assert_equal Fiddle::SIZEOF_VOIDP, RObject.offsetof("basic.klass")
end
def test_embedded_union_members
assert_equal 2 * Fiddle::SIZEOF_VOIDP, RObject.offsetof("as")
assert_equal 2 * Fiddle::SIZEOF_VOIDP, RObject.offsetof("as.heap")
assert_equal 2 * Fiddle::SIZEOF_VOIDP, RObject.offsetof("as.heap.numiv")
assert_equal 3 * Fiddle::SIZEOF_VOIDP, RObject.offsetof("as.heap.ivptr")
assert_equal 4 * Fiddle::SIZEOF_VOIDP, RObject.offsetof("as.heap.iv_index_tbl")
end
def test_as_ary
assert_equal 2 * Fiddle::SIZEOF_VOIDP, RObject.offsetof("as.ary")
end
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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