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ebb96e2303
- Extracts plural rules logic in `TranslationPO` into a new `PluralRules` class. - Changes caching the last used plural index in `TranslationPO` into an LRU cache in `PluralRules`. - Adds tests for `PluralRules`.
72 lines
3.2 KiB
C++
72 lines
3.2 KiB
C++
/**************************************************************************/
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/* plural_rules.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#pragma once
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#include "core/object/ref_counted.h"
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#include "core/templates/lru.h"
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class Expression;
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class PluralRules : public Object {
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GDSOFTCLASS(PluralRules, Object);
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mutable LRUCache<int, int> cache;
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// These two fields are initialized in the constructor.
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const int nplurals;
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const String plural;
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// Cache temporary variables related to `evaluate()` to make it faster.
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class EQNode : public RefCounted {
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GDSOFTCLASS(EQNode, RefCounted);
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public:
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String regex;
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Ref<EQNode> left;
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Ref<EQNode> right;
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};
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Ref<EQNode> equi_tests;
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Ref<Expression> expr;
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int _find_unquoted(const String &p_src, char32_t p_chr) const;
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int _eq_test(const Array &p_input_val, const Ref<EQNode> &p_node, const Variant &p_result) const;
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void _cache_plural_tests(const String &p_plural_rule, Ref<EQNode> &p_node);
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PluralRules(int p_nplurals, const String &p_plural);
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public:
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int evaluate(int p_n) const;
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int get_nplurals() const { return nplurals; }
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String get_plural() const { return plural; }
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static PluralRules *parse(const String &p_rules);
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};
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