mirror of
https://github.com/SerenityOS/serenity
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216e21a1fa
This isn't a complete conversion to ErrorOr<void>, but a good chunk. The end goal here is to propagate buffer allocation failures to the caller, and allow the use of TRY() with formatting functions.
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Format.h>
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#include <AK/Types.h>
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class VirtualAddress {
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public:
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VirtualAddress() = default;
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constexpr explicit VirtualAddress(FlatPtr address)
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: m_address(address)
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{
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}
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explicit VirtualAddress(const void* address)
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: m_address((FlatPtr)address)
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{
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}
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[[nodiscard]] constexpr bool is_null() const { return m_address == 0; }
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[[nodiscard]] constexpr bool is_page_aligned() const { return (m_address & 0xfff) == 0; }
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[[nodiscard]] constexpr VirtualAddress offset(FlatPtr o) const { return VirtualAddress(m_address + o); }
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[[nodiscard]] constexpr FlatPtr get() const { return m_address; }
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void set(FlatPtr address) { m_address = address; }
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void mask(FlatPtr m) { m_address &= m; }
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bool operator<=(const VirtualAddress& other) const { return m_address <= other.m_address; }
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bool operator>=(const VirtualAddress& other) const { return m_address >= other.m_address; }
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bool operator>(const VirtualAddress& other) const { return m_address > other.m_address; }
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bool operator<(const VirtualAddress& other) const { return m_address < other.m_address; }
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bool operator==(const VirtualAddress& other) const { return m_address == other.m_address; }
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bool operator!=(const VirtualAddress& other) const { return m_address != other.m_address; }
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// NOLINTNEXTLINE(readability-make-member-function-const) const VirtualAddress shouldn't be allowed to modify the underlying memory
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[[nodiscard]] u8* as_ptr() { return reinterpret_cast<u8*>(m_address); }
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[[nodiscard]] const u8* as_ptr() const { return reinterpret_cast<const u8*>(m_address); }
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[[nodiscard]] VirtualAddress page_base() const { return VirtualAddress(m_address & ~(FlatPtr)0xfffu); }
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private:
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FlatPtr m_address { 0 };
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};
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inline VirtualAddress operator-(const VirtualAddress& a, const VirtualAddress& b)
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{
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return VirtualAddress(a.get() - b.get());
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}
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template<>
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struct AK::Formatter<VirtualAddress> : AK::Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, const VirtualAddress& value)
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{
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return AK::Formatter<FormatString>::format(builder, "V{}", value.as_ptr());
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}
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};
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