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b7a95cba65
ECMA-402 requires validating user input against the EBNF grammar for Unicode locales described in TR-35: https://www.unicode.org/reports/tr35 This commit adds validators for that grammar, as well as other helper to e.g. canonicalize a locale string.
40 lines
1 KiB
C++
40 lines
1 KiB
C++
/*
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* Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
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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/Optional.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#include <LibUnicode/Forward.h>
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namespace Unicode {
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struct LanguageID {
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bool is_root { false };
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Optional<StringView> language {};
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Optional<StringView> script {};
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Optional<StringView> region {};
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Vector<StringView> variants {};
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};
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struct LocaleID {
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LanguageID language_id {};
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};
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// Note: These methods only verify that the provided strings match the EBNF grammar of the
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// Unicode identifier subtag (i.e. no validation is done that the tags actually exist).
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bool is_unicode_language_subtag(StringView);
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bool is_unicode_script_subtag(StringView);
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bool is_unicode_region_subtag(StringView);
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bool is_unicode_variant_subtag(StringView);
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Optional<LanguageID> parse_unicode_language_id(StringView);
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Optional<LocaleID> parse_unicode_locale_id(StringView);
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Optional<String> canonicalize_unicode_locale_id(LocaleID&);
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}
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