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AK: Add a String factory to create a string from a single code point
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2 changed files with 43 additions and 1 deletions
19
AK/String.h
19
AK/String.h
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@ -1,11 +1,13 @@
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/*
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* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2023, Tim Flynn <trflynn89@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/CharacterTypes.h>
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#include <AK/Concepts.h>
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#include <AK/Format.h>
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#include <AK/Forward.h>
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@ -16,6 +18,7 @@
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#include <AK/StringView.h>
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#include <AK/Traits.h>
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#include <AK/Types.h>
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#include <AK/UnicodeUtils.h>
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#include <AK/Vector.h>
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namespace AK {
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@ -74,6 +77,22 @@ public:
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return String { short_string };
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}
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// Creates a new String from a single code point.
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static constexpr String from_code_point(u32 code_point)
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{
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VERIFY(is_unicode(code_point));
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ShortString short_string;
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size_t i = 0;
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auto length = UnicodeUtils::code_point_to_utf8(code_point, [&](auto byte) {
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short_string.storage[i++] = static_cast<u8>(byte);
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});
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short_string.byte_count_and_short_string_flag = (length << 1) | SHORT_STRING_FLAG;
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return String { short_string };
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}
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// Creates a new String by case-transforming this String. Using these methods require linking LibUnicode into your application.
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ErrorOr<String> to_lowercase(Optional<StringView> const& locale = {}) const;
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ErrorOr<String> to_uppercase(Optional<StringView> const& locale = {}) const;
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