forked from Bananymous/banan-os
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
#pragma once
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#include <kernel/ACPI/AML/Buffer.h>
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#include <kernel/ACPI/AML/Names.h>
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#include <kernel/ACPI/AML/Package.h>
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#include <kernel/ACPI/AML/ParseContext.h>
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#include <kernel/ACPI/AML/Reference.h>
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namespace Kernel::ACPI::AML
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{
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struct SizeOf
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{
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static ParseResult parse(ParseContext& context)
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{
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ASSERT(context.aml_data.size() >= 1);
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ASSERT(static_cast<Byte>(context.aml_data[0]) == Byte::SizeOfOp);
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context.aml_data = context.aml_data.slice(1);
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auto object_result = AML::parse_object(context);
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if (!object_result.success())
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return ParseResult::Failure;
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auto object_node = object_result.node();
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if (object_node)
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object_node = object_node->to_underlying();
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if (!object_node)
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{
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AML_ERROR("SizeOf object is null");
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return ParseResult::Failure;
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}
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if (object_node->type != AML::Node::Type::Package)
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object_node = object_node->convert(AML::Node::ConvBuffer | AML::Node::ConvString);
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if (!object_node)
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{
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AML_ERROR("SizeOf object is not Buffer, String or Package");
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return ParseResult::Failure;
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}
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uint64_t size = 0;
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switch (object_node->type)
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{
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case AML::Node::Type::Buffer:
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size = static_cast<AML::Buffer*>(object_node.ptr())->buffer.size();
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break;
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case AML::Node::Type::String:
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size = static_cast<AML::String*>(object_node.ptr())->string.size();
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break;
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case AML::Node::Type::Package:
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size = static_cast<AML::Package*>(object_node.ptr())->elements.size();
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break;
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default:
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ASSERT_NOT_REACHED();
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}
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return ParseResult(MUST(BAN::RefPtr<Integer>::create(size)));
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}
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};
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}
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