Kernel: Rework AML package and implement indexing in to packages

kernel/kernel/ACPI/AML/Package.cpp

@@ -0,0 +1,57 @@
+#include <kernel/ACPI/AML/Package.h>
+
+namespace Kernel::ACPI
+{
+
+	AML::ParseResult AML::Package::parse(AML::ParseContext& context)
+	{
+		ASSERT(context.aml_data.size() >= 1);
+		ASSERT(static_cast<Byte>(context.aml_data[0]) == Byte::PackageOp);
+		context.aml_data = context.aml_data.slice(1);
+
+		auto package_pkg = AML::parse_pkg(context.aml_data);
+		if (!package_pkg.has_value())
+			return ParseResult::Failure;
+
+		auto package_context = context;
+		package_context.aml_data = package_pkg.value();
+
+		if (package_pkg->size() < 1)
+			return ParseResult::Failure;
+		uint8_t num_elements = package_context.aml_data[0];
+		package_context.aml_data = package_context.aml_data.slice(1);
+
+		auto package = MUST(BAN::RefPtr<Package>::create(context.scope));
+		while (package->elements.size() < num_elements && package_context.aml_data.size() > 0)
+		{
+			auto element_result = PackageElement::parse(package_context, package);
+			if (!element_result.success())
+				return ParseResult::Failure;
+			ASSERT(element_result.node() && element_result.node()->type == Node::Type::PackageElement);
+			auto element = static_cast<PackageElement*>(element_result.node().ptr());
+			MUST(package->elements.push_back(element));
+		}
+		while (package->elements.size() < num_elements)
+		{
+			auto uninitialized = MUST(BAN::RefPtr<PackageElement>::create(package));
+			MUST(package->elements.push_back(uninitialized));
+		}
+
+		return ParseResult(package);
+	}
+
+	void AML::Package::debug_print(int indent) const
+	{
+		AML_DEBUG_PRINT_INDENT(indent);
+		AML_DEBUG_PRINT("Package {");
+		AML_DEBUG_PRINTLN("");
+		for (const auto& element : elements)
+		{
+			element->debug_print(indent + 1);
+			AML_DEBUG_PRINTLN("");
+		}
+		AML_DEBUG_PRINT_INDENT(indent);
+		AML_DEBUG_PRINT("}");
+	}
+
+}