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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Format.h>
#include <AK/OwnPtr.h>
namespace Kernel {
class KString {
AK_MAKE_NONCOPYABLE(KString);
AK_MAKE_NONMOVABLE(KString);
public:
[[nodiscard]] static KResultOr<NonnullOwnPtr<KString>> try_create_uninitialized(size_t, char*&);
[[nodiscard]] static NonnullOwnPtr<KString> must_create_uninitialized(size_t, char*&);
[[nodiscard]] static KResultOr<NonnullOwnPtr<KString>> try_create(StringView);
[[nodiscard]] static NonnullOwnPtr<KString> must_create(StringView);
void operator delete(void*);
[[nodiscard]] KResultOr<NonnullOwnPtr<KString>> try_clone() const;
[[nodiscard]] bool is_empty() const { return m_length == 0; }
[[nodiscard]] size_t length() const { return m_length; }
[[nodiscard]] char const* characters() const { return m_characters; }
[[nodiscard]] StringView view() const { return { characters(), length() }; }
private:
explicit KString(size_t length)
: m_length(length)
{
}
size_t m_length { 0 };
char m_characters[0];
};
}
namespace AK {
template<>
struct Formatter<Kernel::KString> : Formatter<StringView> {
void format(FormatBuilder& builder, Kernel::KString const& value)
{
Formatter<StringView>::format(builder, value.view());
}
};
template<>
struct Formatter<OwnPtr<Kernel::KString>> : Formatter<StringView> {
void format(FormatBuilder& builder, OwnPtr<Kernel::KString> const& value)
{
if (value)
Formatter<StringView>::format(builder, value->view());
else
Formatter<StringView>::format(builder, "[out of memory]"sv);
}
};
}
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