memory_view.c: Add rb_memory_view_extract_item_members

1 files changed, 51 insertions, 0 deletions

diff --git a/test/ruby/test_memory_view.rb b/test/ruby/test_memory_view.rb
index baf544c227..0150e18c72 100644
--- a/test/ruby/test_memory_view.rb
+++ b/test/ruby/test_memory_view.rb
@@ -197,6 +197,57 @@ class TestMemoryView < Test::Unit::TestCase
     assert_equal(expected_result, members)
   end
 
+  def test_rb_memory_view_extract_item_members
+    m = MemoryViewTestUtils
+    assert_equal(1, m.extract_item_members([1].pack("c"), "c"))
+    assert_equal([1, 2], m.extract_item_members([1, 2].pack("ii"), "ii"))
+    assert_equal([1, 2, 3], m.extract_item_members([1, 2, 3].pack("cls"), "cls"))
+  end
+
+  def test_rb_memory_view_extract_item_members_endianness
+    m = MemoryViewTestUtils
+    assert_equal([0x0102, 0x0304], m.extract_item_members([1, 2, 3, 4].pack("c*"), "S>2"))
+    assert_equal([0x0102, 0x0304], m.extract_item_members([1, 2, 3, 4].pack("c*"), "n2"))
+    assert_equal([0x0201, 0x0403], m.extract_item_members([1, 2, 3, 4].pack("c*"), "S<2"))
+    assert_equal([0x0201, 0x0403], m.extract_item_members([1, 2, 3, 4].pack("c*"), "v2"))
+    assert_equal(0x01020304, m.extract_item_members([1, 2, 3, 4].pack("c*"), "L>"))
+    assert_equal(0x01020304, m.extract_item_members([1, 2, 3, 4].pack("c*"), "N"))
+    assert_equal(0x04030201, m.extract_item_members([1, 2, 3, 4].pack("c*"), "L<"))
+    assert_equal(0x04030201, m.extract_item_members([1, 2, 3, 4].pack("c*"), "V"))
+    assert_equal(0x0102030405060708, m.extract_item_members([1, 2, 3, 4, 5, 6, 7, 8].pack("c*"), "Q>"))
+    assert_equal(0x0807060504030201, m.extract_item_members([1, 2, 3, 4, 5, 6, 7, 8].pack("c*"), "Q<"))
+  end
+
+  def test_rb_memory_view_extract_item_members_float
+    m = MemoryViewTestUtils
+    packed = [1.23].pack("f")
+    assert_equal(packed.unpack("f")[0], m.extract_item_members(packed, "f"))
+  end
+
+  def test_rb_memory_view_extract_item_members_float_endianness
+    m = MemoryViewTestUtils
+    hi, lo = [1.23].pack("f").unpack("L")[0].divmod(0x10000)
+    packed = [lo, hi].pack("S*")
+    assert_equal(packed.unpack("e")[0], m.extract_item_members(packed, "e"))
+    packed = [hi, lo].pack("S*")
+    assert_equal(packed.unpack("g")[0], m.extract_item_members(packed, "g"))
+  end
+
+  def test_rb_memory_view_extract_item_members_doble
+    m = MemoryViewTestUtils
+    packed = [1.23].pack("d")
+    assert_equal(1.23, m.extract_item_members(packed, "d"))
+  end
+
+  def test_rb_memory_view_extract_item_members_doble_endianness
+    m = MemoryViewTestUtils
+    hi, lo = [1.23].pack("d").unpack("Q")[0].divmod(0x10000)
+    packed = [lo, hi].pack("L*")
+    assert_equal(packed.unpack("E")[0], m.extract_item_members(packed, "E"))
+    packed = [hi, lo].pack("L*")
+    assert_equal(packed.unpack("G")[0], m.extract_item_members(packed, "G"))
+  end
+
   def test_rb_memory_view_available_p
     es = MemoryViewTestUtils::ExportableString.new("ruby")
     assert_equal(true, MemoryViewTestUtils.available?(es))