d5871f5717
Similar to POSIX read, the basic read and write functions of AK::Stream do not have a lower limit of how much data they read or write (apart from "none at all"). Rename the functions to "read some [data]" and "write some [data]" (with "data" being omitted, since everything here is reading and writing data) to make them sufficiently distinct from the functions that ensure to use the entire buffer (which should be the go-to function for most usages). No functional changes, just a lot of new FIXMEs.
687 lines
24 KiB
C++
687 lines
24 KiB
C++
/*
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* Copyright (c) 2022, 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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#include "../LibUnicode/GeneratorUtil.h" // FIXME: Move this somewhere common.
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#include <AK/DeprecatedString.h>
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#include <AK/JsonObject.h>
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#include <AK/JsonParser.h>
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#include <AK/JsonValue.h>
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#include <AK/LexicalPath.h>
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#include <AK/SourceGenerator.h>
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#include <AK/StringBuilder.h>
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#include <AK/Variant.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/DeprecatedFile.h>
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#include <LibLocale/PluralRules.h>
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static DeprecatedString format_identifier(StringView owner, DeprecatedString identifier)
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{
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identifier = identifier.replace("-"sv, "_"sv, ReplaceMode::All);
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if (all_of(identifier, is_ascii_digit))
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return DeprecatedString::formatted("{}_{}", owner[0], identifier);
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if (is_ascii_lower_alpha(identifier[0]))
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return DeprecatedString::formatted("{:c}{}", to_ascii_uppercase(identifier[0]), identifier.substring_view(1));
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return identifier;
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}
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struct Relation {
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using Range = Array<u32, 2>;
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using Comparator = Variant<u32, Range>;
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enum class Type {
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Equality,
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Inequality,
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};
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DeprecatedString const& modulus_variable_name() const
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{
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VERIFY(modulus.has_value());
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if (!cached_modulus_variable_name.has_value())
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cached_modulus_variable_name = DeprecatedString::formatted("mod_{}_{}", symbol, *modulus);
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return *cached_modulus_variable_name;
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}
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DeprecatedString const& exponential_variable_name() const
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{
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if (!cached_exponential_variable_name.has_value())
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cached_exponential_variable_name = DeprecatedString::formatted("exp_{}", symbol);
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return *cached_exponential_variable_name;
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}
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void generate_relation(SourceGenerator& generator) const
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{
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auto append_variable_name = [&]() {
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if (modulus.has_value())
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generator.append(modulus_variable_name());
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else if (symbol == 'e' || symbol == 'c')
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generator.append(exponential_variable_name());
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else
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generator.append(DeprecatedString::formatted("ops.{}", Locale::PluralOperands::symbol_to_variable_name(symbol)));
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};
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auto append_value = [&](u32 value) {
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append_variable_name();
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generator.append(" == "sv);
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generator.append(DeprecatedString::number(value));
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};
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auto append_range = [&](auto const& range) {
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// This check avoids generating "0 <= unsigned_value", which is always true.
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if (range[0] != 0 || Locale::PluralOperands::symbol_requires_floating_point_modulus(symbol)) {
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generator.append(DeprecatedString::formatted("{} <= ", range[0]));
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append_variable_name();
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generator.append(" && "sv);
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}
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append_variable_name();
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generator.append(DeprecatedString::formatted(" <= {}", range[1]));
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};
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if (type == Type::Inequality)
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generator.append("!"sv);
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generator.append("("sv);
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bool first = true;
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for (auto const& comparator : comparators) {
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generator.append(first ? "("sv : " || ("sv);
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comparator.visit(
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[&](u32 value) { append_value(value); },
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[&](Range const& range) { append_range(range); });
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generator.append(")"sv);
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first = false;
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}
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generator.append(")"sv);
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}
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void generate_precomputed_variables(SourceGenerator& generator, HashTable<DeprecatedString>& generated_variables) const
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{
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// FIXME: How do we handle the exponential symbols? They seem unused by ECMA-402.
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if (symbol == 'e' || symbol == 'c') {
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if (auto variable = exponential_variable_name(); !generated_variables.contains(variable)) {
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generated_variables.set(variable);
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generator.set("variable"sv, move(variable));
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generator.append(R"~~~(
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auto @variable@ = 0;)~~~");
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}
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}
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if (!modulus.has_value())
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return;
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auto variable = modulus_variable_name();
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if (generated_variables.contains(variable))
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return;
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generated_variables.set(variable);
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generator.set("variable"sv, move(variable));
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generator.set("operand"sv, Locale::PluralOperands::symbol_to_variable_name(symbol));
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generator.set("modulus"sv, DeprecatedString::number(*modulus));
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if (Locale::PluralOperands::symbol_requires_floating_point_modulus(symbol)) {
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generator.append(R"~~~(
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auto @variable@ = fmod(ops.@operand@, @modulus@);)~~~");
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} else {
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generator.append(R"~~~(
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auto @variable@ = ops.@operand@ % @modulus@;)~~~");
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}
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}
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Type type;
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char symbol { 0 };
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Optional<u32> modulus;
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Vector<Comparator> comparators;
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private:
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mutable Optional<DeprecatedString> cached_modulus_variable_name;
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mutable Optional<DeprecatedString> cached_exponential_variable_name;
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};
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struct Condition {
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void generate_condition(SourceGenerator& generator) const
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{
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for (size_t i = 0; i < relations.size(); ++i) {
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if (i > 0)
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generator.append(" || "sv);
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auto const& conjunctions = relations[i];
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if (conjunctions.size() > 1)
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generator.append("("sv);
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for (size_t j = 0; j < conjunctions.size(); ++j) {
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if (j > 0)
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generator.append(" && "sv);
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conjunctions[j].generate_relation(generator);
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}
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if (conjunctions.size() > 1)
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generator.append(")"sv);
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}
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}
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void generate_precomputed_variables(SourceGenerator& generator, HashTable<DeprecatedString>& generated_variables) const
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{
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for (auto const& conjunctions : relations) {
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for (auto const& relation : conjunctions)
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relation.generate_precomputed_variables(generator, generated_variables);
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}
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}
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Vector<Vector<Relation>> relations;
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};
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struct Range {
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DeprecatedString start;
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DeprecatedString end;
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DeprecatedString category;
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};
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using Conditions = HashMap<DeprecatedString, Condition>;
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using Ranges = Vector<Range>;
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struct LocaleData {
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static DeprecatedString generated_method_name(StringView form, StringView locale)
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{
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return DeprecatedString::formatted("{}_plurality_{}", form, format_identifier({}, locale));
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}
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Conditions& rules_for_form(StringView form)
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{
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if (form == "cardinal")
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return cardinal_rules;
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if (form == "ordinal")
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return ordinal_rules;
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VERIFY_NOT_REACHED();
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}
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Conditions cardinal_rules;
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Conditions ordinal_rules;
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Ranges plural_ranges;
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};
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struct CLDR {
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UniqueStringStorage unique_strings;
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HashMap<DeprecatedString, LocaleData> locales;
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};
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static Relation parse_relation(StringView relation)
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{
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static constexpr auto equality_operator = " = "sv;
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static constexpr auto inequality_operator = " != "sv;
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static constexpr auto modulus_operator = " % "sv;
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static constexpr auto range_operator = ".."sv;
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static constexpr auto set_operator = ',';
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Relation parsed;
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StringView lhs;
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StringView rhs;
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if (auto index = relation.find(equality_operator); index.has_value()) {
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parsed.type = Relation::Type::Equality;
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lhs = relation.substring_view(0, *index);
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rhs = relation.substring_view(*index + equality_operator.length());
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} else if (auto index = relation.find(inequality_operator); index.has_value()) {
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parsed.type = Relation::Type::Inequality;
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lhs = relation.substring_view(0, *index);
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rhs = relation.substring_view(*index + inequality_operator.length());
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} else {
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VERIFY_NOT_REACHED();
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}
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if (auto index = lhs.find(modulus_operator); index.has_value()) {
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auto symbol = lhs.substring_view(0, *index);
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VERIFY(symbol.length() == 1);
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auto modulus = lhs.substring_view(*index + modulus_operator.length()).to_uint();
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VERIFY(modulus.has_value());
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parsed.symbol = symbol[0];
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parsed.modulus = move(modulus);
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} else {
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VERIFY(lhs.length() == 1);
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parsed.symbol = lhs[0];
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}
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rhs.for_each_split_view(set_operator, SplitBehavior::Nothing, [&](auto set) {
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if (auto index = set.find(range_operator); index.has_value()) {
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auto range_begin = set.substring_view(0, *index).to_uint();
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VERIFY(range_begin.has_value());
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auto range_end = set.substring_view(*index + range_operator.length()).to_uint();
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VERIFY(range_end.has_value());
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parsed.comparators.empend(Array { *range_begin, *range_end });
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} else {
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auto value = set.to_uint();
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VERIFY(value.has_value());
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parsed.comparators.empend(*value);
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}
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});
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return parsed;
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}
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// https://unicode.org/reports/tr35/tr35-numbers.html#Plural_rules_syntax
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//
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// A very simplified view of a plural rule is:
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//
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// condition.* ([@integer|@decimal] sample)+
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//
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// The "sample" being series of integer or decimal values that fit the specified condition. The
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// condition may be one or more binary expressions, chained together with "and" or "or" operators.
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static void parse_condition(StringView category, StringView rule, Conditions& rules)
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{
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static constexpr auto other_category = "other"sv;
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static constexpr auto disjunction_keyword = " or "sv;
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static constexpr auto conjunction_keyword = " and "sv;
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// We don't need the examples in the generated code, so we can drop them here.
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auto example_index = rule.find('@');
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VERIFY(example_index.has_value());
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auto condition = rule.substring_view(0, *example_index).trim_whitespace();
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// Our implementation does not generate rules for the "other" category. We simply return "other"
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// for values that do not match any rules. This will need to be revisited if this VERIFY fails.
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if (condition.is_empty()) {
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VERIFY(category == other_category);
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return;
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}
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auto& relation_list = rules.ensure(category);
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// The grammar for a condition (i.e. a chain of relations) is:
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//
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// condition = and_condition ('or' and_condition)*
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// and_condition = relation ('and' relation)*
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//
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// This affords some simplicity in that disjunctions are never embedded within a conjunction.
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condition.for_each_split_view(disjunction_keyword, SplitBehavior::Nothing, [&](auto disjunction) {
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Vector<Relation> conjunctions;
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disjunction.for_each_split_view(conjunction_keyword, SplitBehavior::Nothing, [&](auto relation) {
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conjunctions.append(parse_relation(relation));
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});
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relation_list.relations.append(move(conjunctions));
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});
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}
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static ErrorOr<void> parse_plural_rules(DeprecatedString core_supplemental_path, StringView file_name, CLDR& cldr)
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{
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static constexpr auto form_prefix = "plurals-type-"sv;
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static constexpr auto rule_prefix = "pluralRule-count-"sv;
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LexicalPath plurals_path(move(core_supplemental_path));
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plurals_path = plurals_path.append(file_name);
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auto plurals = TRY(read_json_file(plurals_path.string()));
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auto const& supplemental_object = plurals.as_object().get_object("supplemental"sv).value();
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supplemental_object.for_each_member([&](auto const& key, auto const& plurals_object) {
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if (!key.starts_with(form_prefix))
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return;
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auto form = key.substring_view(form_prefix.length());
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plurals_object.as_object().for_each_member([&](auto const& loc, auto const& rules) {
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auto locale = cldr.locales.get(loc);
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if (!locale.has_value())
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return;
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rules.as_object().for_each_member([&](auto const& key, auto const& condition) {
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VERIFY(key.starts_with(rule_prefix));
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auto category = key.substring_view(rule_prefix.length());
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parse_condition(category, condition.as_string(), locale->rules_for_form(form));
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});
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});
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});
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return {};
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}
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// https://unicode.org/reports/tr35/tr35-numbers.html#Plural_Ranges
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static ErrorOr<void> parse_plural_ranges(DeprecatedString core_supplemental_path, CLDR& cldr)
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{
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static constexpr auto start_segment = "-start-"sv;
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static constexpr auto end_segment = "-end-"sv;
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LexicalPath plural_ranges_path(move(core_supplemental_path));
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plural_ranges_path = plural_ranges_path.append("pluralRanges.json"sv);
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auto plural_ranges = TRY(read_json_file(plural_ranges_path.string()));
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auto const& supplemental_object = plural_ranges.as_object().get_object("supplemental"sv).value();
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auto const& plurals_object = supplemental_object.get_object("plurals"sv).value();
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plurals_object.for_each_member([&](auto const& loc, auto const& ranges_object) {
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auto locale = cldr.locales.get(loc);
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if (!locale.has_value())
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return;
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ranges_object.as_object().for_each_member([&](auto const& range, auto const& category) {
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auto start_index = range.find(start_segment);
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VERIFY(start_index.has_value());
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auto end_index = range.find(end_segment);
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VERIFY(end_index.has_value());
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*start_index += start_segment.length();
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auto start = range.substring(*start_index, *end_index - *start_index);
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auto end = range.substring(*end_index + end_segment.length());
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locale->plural_ranges.empend(move(start), move(end), category.as_string());
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});
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});
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return {};
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}
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static ErrorOr<void> parse_all_locales(DeprecatedString core_path, DeprecatedString locale_names_path, CLDR& cldr)
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{
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auto identity_iterator = TRY(path_to_dir_iterator(move(locale_names_path)));
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LexicalPath core_supplemental_path(move(core_path));
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core_supplemental_path = core_supplemental_path.append("supplemental"sv);
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VERIFY(Core::DeprecatedFile::is_directory(core_supplemental_path.string()));
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auto remove_variants_from_path = [&](DeprecatedString path) -> ErrorOr<DeprecatedString> {
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auto parsed_locale = TRY(CanonicalLanguageID::parse(cldr.unique_strings, LexicalPath::basename(path)));
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StringBuilder builder;
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builder.append(cldr.unique_strings.get(parsed_locale.language));
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if (auto script = cldr.unique_strings.get(parsed_locale.script); !script.is_empty())
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builder.appendff("-{}", script);
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if (auto region = cldr.unique_strings.get(parsed_locale.region); !region.is_empty())
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builder.appendff("-{}", region);
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return builder.to_deprecated_string();
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};
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while (identity_iterator.has_next()) {
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auto locale_path = TRY(next_path_from_dir_iterator(identity_iterator));
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auto language = TRY(remove_variants_from_path(locale_path));
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cldr.locales.ensure(language);
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}
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TRY(parse_plural_rules(core_supplemental_path.string(), "plurals.json"sv, cldr));
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TRY(parse_plural_rules(core_supplemental_path.string(), "ordinals.json"sv, cldr));
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TRY(parse_plural_ranges(core_supplemental_path.string(), cldr));
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return {};
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}
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static ErrorOr<void> generate_unicode_locale_header(Core::BufferedFile& file, CLDR&)
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{
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StringBuilder builder;
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SourceGenerator generator { builder };
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generator.append(R"~~~(
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#include <AK/Types.h>
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#pragma once
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namespace Locale {
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)~~~");
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generator.append(R"~~~(
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}
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)~~~");
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// FIXME: This should write the entire span.
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TRY(file.write_some(generator.as_string_view().bytes()));
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return {};
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}
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static ErrorOr<void> generate_unicode_locale_implementation(Core::BufferedFile& file, CLDR& cldr)
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{
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StringBuilder builder;
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SourceGenerator generator { builder };
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auto locales = cldr.locales.keys();
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quick_sort(locales);
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generator.append(R"~~~(
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#include <AK/Array.h>
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#include <LibLocale/Locale.h>
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#include <LibLocale/LocaleData.h>
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#include <LibLocale/PluralRules.h>
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#include <LibLocale/PluralRulesData.h>
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#include <math.h>
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namespace Locale {
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using PluralCategoryFunction = PluralCategory(*)(PluralOperands);
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using PluralRangeFunction = PluralCategory(*)(PluralCategory, PluralCategory);
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static PluralCategory default_category(PluralOperands)
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{
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return PluralCategory::Other;
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}
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static PluralCategory default_range(PluralCategory, PluralCategory end)
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{
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return end;
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}
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)~~~");
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auto append_rules = [&](auto form, auto const& locale, auto const& rules) {
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if (rules.is_empty())
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return;
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generator.set("method"sv, LocaleData::generated_method_name(form, locale));
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HashTable<DeprecatedString> generated_variables;
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generator.append(R"~~~(
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static PluralCategory @method@([[maybe_unused]] PluralOperands ops)
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{)~~~");
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for (auto [category, condition] : rules) {
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condition.generate_precomputed_variables(generator, generated_variables);
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generator.append(R"~~~(
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if ()~~~");
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generator.set("category"sv, format_identifier({}, category));
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condition.generate_condition(generator);
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|
generator.append(R"~~~()
|
|
return PluralCategory::@category@;)~~~");
|
|
}
|
|
|
|
generator.append(R"~~~(
|
|
return PluralCategory::Other;
|
|
}
|
|
)~~~");
|
|
};
|
|
|
|
auto append_ranges = [&](auto const& locale, auto const& ranges) {
|
|
if (ranges.is_empty())
|
|
return;
|
|
|
|
generator.set("method"sv, LocaleData::generated_method_name("range"sv, locale));
|
|
|
|
generator.append(R"~~~(
|
|
static PluralCategory @method@(PluralCategory start, PluralCategory end)
|
|
{)~~~");
|
|
|
|
for (auto const& range : ranges) {
|
|
generator.set("start"sv, format_identifier({}, range.start));
|
|
generator.set("end"sv, format_identifier({}, range.end));
|
|
generator.set("category"sv, format_identifier({}, range.category));
|
|
|
|
generator.append(R"~~~(
|
|
if (start == PluralCategory::@start@ && end == PluralCategory::@end@)
|
|
return PluralCategory::@category@;)~~~");
|
|
}
|
|
|
|
generator.append(R"~~~(
|
|
return end;
|
|
}
|
|
)~~~");
|
|
};
|
|
|
|
auto append_lookup_table = [&](auto type, auto form, auto default_, auto data_for_locale) {
|
|
generator.set("type"sv, type);
|
|
generator.set("form"sv, form);
|
|
generator.set("default"sv, default_);
|
|
generator.set("size"sv, DeprecatedString::number(locales.size()));
|
|
|
|
generator.append(R"~~~(
|
|
static constexpr Array<@type@, @size@> s_@form@_functions { {)~~~");
|
|
|
|
for (auto const& locale : locales) {
|
|
auto& rules = data_for_locale(cldr.locales.find(locale)->value, form);
|
|
|
|
if (rules.is_empty()) {
|
|
generator.append(R"~~~(
|
|
@default@,)~~~");
|
|
} else {
|
|
generator.set("method"sv, LocaleData::generated_method_name(form, locale));
|
|
generator.append(R"~~~(
|
|
@method@,)~~~");
|
|
}
|
|
}
|
|
|
|
generator.append(R"~~~(
|
|
} };
|
|
)~~~");
|
|
};
|
|
|
|
auto append_categories = [&](auto const& name, auto const& rules) {
|
|
generator.set("name", name);
|
|
generator.set("size", DeprecatedString::number(rules.size() + 1));
|
|
|
|
generator.append(R"~~~(
|
|
static constexpr Array<PluralCategory, @size@> @name@ { { PluralCategory::Other)~~~");
|
|
|
|
for (auto [category, condition] : rules) {
|
|
generator.set("category"sv, format_identifier({}, category));
|
|
generator.append(", PluralCategory::@category@"sv);
|
|
}
|
|
|
|
generator.append("} };");
|
|
};
|
|
|
|
for (auto [locale, rules] : cldr.locales) {
|
|
append_rules("cardinal"sv, locale, rules.cardinal_rules);
|
|
append_rules("ordinal"sv, locale, rules.ordinal_rules);
|
|
append_ranges(locale, rules.plural_ranges);
|
|
}
|
|
|
|
append_lookup_table("PluralCategoryFunction"sv, "cardinal"sv, "default_category"sv, [](auto& rules, auto form) -> Conditions& { return rules.rules_for_form(form); });
|
|
append_lookup_table("PluralCategoryFunction"sv, "ordinal"sv, "default_category"sv, [](auto& rules, auto form) -> Conditions& { return rules.rules_for_form(form); });
|
|
append_lookup_table("PluralRangeFunction"sv, "range"sv, "default_range"sv, [](auto& rules, auto) -> Ranges& { return rules.plural_ranges; });
|
|
|
|
generate_mapping(generator, locales, "PluralCategory"sv, "s_cardinal_categories"sv, "s_cardinal_categories_{}"sv, format_identifier,
|
|
[&](auto const& name, auto const& locale) {
|
|
auto& rules = cldr.locales.find(locale)->value;
|
|
append_categories(name, rules.rules_for_form("cardinal"sv));
|
|
});
|
|
|
|
generate_mapping(generator, locales, "PluralCategory"sv, "s_ordinal_categories"sv, "s_ordinal_categories_{}"sv, format_identifier,
|
|
[&](auto const& name, auto const& locale) {
|
|
auto& rules = cldr.locales.find(locale)->value;
|
|
append_categories(name, rules.rules_for_form("ordinal"sv));
|
|
});
|
|
|
|
generator.append(R"~~~(
|
|
PluralCategory determine_plural_category(StringView locale, PluralForm form, PluralOperands operands)
|
|
{
|
|
auto locale_value = locale_from_string(locale);
|
|
if (!locale_value.has_value())
|
|
return PluralCategory::Other;
|
|
|
|
auto locale_index = to_underlying(*locale_value) - 1; // Subtract 1 because 0 == Locale::None.
|
|
PluralCategoryFunction decider { nullptr };
|
|
|
|
switch (form) {
|
|
case PluralForm::Cardinal:
|
|
decider = s_cardinal_functions[locale_index];
|
|
break;
|
|
case PluralForm::Ordinal:
|
|
decider = s_ordinal_functions[locale_index];
|
|
break;
|
|
}
|
|
|
|
return decider(move(operands));
|
|
}
|
|
|
|
ReadonlySpan<PluralCategory> available_plural_categories(StringView locale, PluralForm form)
|
|
{
|
|
auto locale_value = locale_from_string(locale);
|
|
if (!locale_value.has_value())
|
|
return {};
|
|
|
|
auto locale_index = to_underlying(*locale_value) - 1; // Subtract 1 because 0 == Locale::None.
|
|
|
|
switch (form) {
|
|
case PluralForm::Cardinal:
|
|
return s_cardinal_categories[locale_index];
|
|
case PluralForm::Ordinal:
|
|
return s_ordinal_categories[locale_index];
|
|
}
|
|
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
PluralCategory determine_plural_range(StringView locale, PluralCategory start, PluralCategory end)
|
|
{
|
|
auto locale_value = locale_from_string(locale);
|
|
if (!locale_value.has_value())
|
|
return PluralCategory::Other;
|
|
|
|
auto locale_index = to_underlying(*locale_value) - 1; // Subtract 1 because 0 == Locale::None.
|
|
|
|
PluralRangeFunction decider = s_range_functions[locale_index];
|
|
return decider(start, end);
|
|
}
|
|
|
|
}
|
|
)~~~");
|
|
|
|
// FIXME: This should write the entire span.
|
|
TRY(file.write_some(generator.as_string_view().bytes()));
|
|
return {};
|
|
}
|
|
|
|
ErrorOr<int> serenity_main(Main::Arguments arguments)
|
|
{
|
|
StringView generated_header_path;
|
|
StringView generated_implementation_path;
|
|
StringView core_path;
|
|
StringView locale_names_path;
|
|
|
|
Core::ArgsParser args_parser;
|
|
args_parser.add_option(generated_header_path, "Path to the Unicode locale header file to generate", "generated-header-path", 'h', "generated-header-path");
|
|
args_parser.add_option(generated_implementation_path, "Path to the Unicode locale implementation file to generate", "generated-implementation-path", 'c', "generated-implementation-path");
|
|
args_parser.add_option(core_path, "Path to cldr-core directory", "core-path", 'r', "core-path");
|
|
args_parser.add_option(locale_names_path, "Path to cldr-localenames directory", "locale-names-path", 'l', "locale-names-path");
|
|
args_parser.parse(arguments);
|
|
|
|
auto generated_header_file = TRY(open_file(generated_header_path, Core::File::OpenMode::Write));
|
|
auto generated_implementation_file = TRY(open_file(generated_implementation_path, Core::File::OpenMode::Write));
|
|
|
|
CLDR cldr;
|
|
TRY(parse_all_locales(core_path, locale_names_path, cldr));
|
|
|
|
TRY(generate_unicode_locale_header(*generated_header_file, cldr));
|
|
TRY(generate_unicode_locale_implementation(*generated_implementation_file, cldr));
|
|
|
|
return 0;
|
|
}
|