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<?php |
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/** |
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* webtrees: online genealogy |
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* Copyright (C) 2021 webtrees development team |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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declare(strict_types=1); |
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namespace Fisharebest\Webtrees\Encodings; |
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use function chr; |
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use function intdiv; |
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use function ord; |
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use function str_split; |
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/** |
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* Convert between UTF-16LE and UTF-8. |
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*/ |
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class UTF16LE extends AbstractUTF16Encoding |
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{ |
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public const NAME = 'UTF-16LE'; |
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public const BYTE_ORDER_MARK = "\xFF\xFE"; |
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public const REPLACEMENT_CHARACTER = "\xFD\xFF"; |
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/** |
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* Convert two bytes to a code-point, taking care of byte-order. |
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* |
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* @param string $character |
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* |
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* @return int |
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*/ |
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protected function characterToCodePoint(string $character): int |
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{ |
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return ord($character[0]) + 256 * ord($character[1]); |
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} |
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/** |
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* Convert a code-point to two bytes, taking care of byte-order. |
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* |
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* @param int $code_point |
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* |
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* @return string |
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*/ |
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protected function codePointToCharacter(int $code_point): string |
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{ |
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if ($code_point >= 0xD800 && $code_point <= 0xDFFF) { |
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return self::REPLACEMENT_CHARACTER; |
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} |
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return chr($code_point % 256) . chr(intdiv($code_point, 256)); |
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} |
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} |
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fisharebest /
webtrees
