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vendor/yiisoft/yii2/i18n/GettextMoFile.php
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vendor/yiisoft/yii2/i18n/GettextMoFile.php
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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\i18n;
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use yii\base\Exception;
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/**
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* GettextMoFile represents an MO Gettext message file.
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*
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* This class is written by adapting Michael's Gettext_MO class in PEAR.
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* Please refer to the following license terms.
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*
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* Copyright (c) 2004-2005, Michael Wallner <mike@iworks.at>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class GettextMoFile extends GettextFile
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{
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/**
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* @var bool whether to use big-endian when reading and writing an integer.
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*/
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public $useBigEndian = false;
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/**
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* Loads messages from an MO file.
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* @param string $filePath file path
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* @param string $context message context
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* @return array message translations. Array keys are source messages and array values are translated messages:
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* source message => translated message.
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* @throws Exception if unable to read the MO file
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*/
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public function load($filePath, $context)
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{
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if (false === ($fileHandle = @fopen($filePath, 'rb'))) {
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throw new Exception('Unable to read file "' . $filePath . '".');
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}
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if (false === @flock($fileHandle, LOCK_SH)) {
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throw new Exception('Unable to lock file "' . $filePath . '" for reading.');
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}
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// magic
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$array = unpack('c', $this->readBytes($fileHandle, 4));
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$magic = current($array);
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if ($magic == -34) {
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$this->useBigEndian = false;
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} elseif ($magic == -107) {
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$this->useBigEndian = true;
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} else {
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throw new Exception('Invalid MO file: ' . $filePath . ' (magic: ' . $magic . ').');
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}
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// revision
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$revision = $this->readInteger($fileHandle);
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if ($revision !== 0) {
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throw new Exception('Invalid MO file revision: ' . $revision . '.');
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}
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$count = $this->readInteger($fileHandle);
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$sourceOffset = $this->readInteger($fileHandle);
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$targetOffset = $this->readInteger($fileHandle);
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$sourceLengths = [];
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$sourceOffsets = [];
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fseek($fileHandle, $sourceOffset);
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for ($i = 0; $i < $count; ++$i) {
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$sourceLengths[] = $this->readInteger($fileHandle);
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$sourceOffsets[] = $this->readInteger($fileHandle);
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}
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$targetLengths = [];
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$targetOffsets = [];
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fseek($fileHandle, $targetOffset);
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for ($i = 0; $i < $count; ++$i) {
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$targetLengths[] = $this->readInteger($fileHandle);
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$targetOffsets[] = $this->readInteger($fileHandle);
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}
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$messages = [];
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for ($i = 0; $i < $count; ++$i) {
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$id = $this->readString($fileHandle, $sourceLengths[$i], $sourceOffsets[$i]);
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$separatorPosition = strpos($id, chr(4));
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if ((!$context && $separatorPosition === false) || ($context && $separatorPosition !== false && strncmp($id, $context, $separatorPosition) === 0)) {
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if ($separatorPosition !== false) {
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$id = substr($id, $separatorPosition + 1);
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}
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$message = $this->readString($fileHandle, $targetLengths[$i], $targetOffsets[$i]);
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$messages[$id] = $message;
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}
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}
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@flock($fileHandle, LOCK_UN);
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@fclose($fileHandle);
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return $messages;
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}
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/**
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* Saves messages to an MO file.
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* @param string $filePath file path
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* @param array $messages message translations. Array keys are source messages and array values are
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* translated messages: source message => translated message. Note if the message has a context,
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* the message ID must be prefixed with the context with chr(4) as the separator.
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* @throws Exception if unable to save the MO file
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*/
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public function save($filePath, $messages)
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{
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if (false === ($fileHandle = @fopen($filePath, 'wb'))) {
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throw new Exception('Unable to write file "' . $filePath . '".');
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}
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if (false === @flock($fileHandle, LOCK_EX)) {
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throw new Exception('Unable to lock file "' . $filePath . '" for reading.');
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}
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// magic
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if ($this->useBigEndian) {
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$this->writeBytes($fileHandle, pack('c*', 0x95, 0x04, 0x12, 0xde)); // -107
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} else {
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$this->writeBytes($fileHandle, pack('c*', 0xde, 0x12, 0x04, 0x95)); // -34
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}
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// revision
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$this->writeInteger($fileHandle, 0);
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// message count
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$messageCount = count($messages);
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$this->writeInteger($fileHandle, $messageCount);
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// offset of source message table
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$offset = 28;
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$this->writeInteger($fileHandle, $offset);
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$offset += $messageCount * 8;
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$this->writeInteger($fileHandle, $offset);
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// hashtable size, omitted
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$this->writeInteger($fileHandle, 0);
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$offset += $messageCount * 8;
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$this->writeInteger($fileHandle, $offset);
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// length and offsets for source messages
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foreach (array_keys($messages) as $id) {
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$length = strlen($id);
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$this->writeInteger($fileHandle, $length);
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$this->writeInteger($fileHandle, $offset);
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$offset += $length + 1;
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}
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// length and offsets for target messages
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foreach ($messages as $message) {
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$length = strlen($message);
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$this->writeInteger($fileHandle, $length);
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$this->writeInteger($fileHandle, $offset);
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$offset += $length + 1;
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}
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// source messages
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foreach (array_keys($messages) as $id) {
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$this->writeString($fileHandle, $id);
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}
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// target messages
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foreach ($messages as $message) {
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$this->writeString($fileHandle, $message);
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}
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@flock($fileHandle, LOCK_UN);
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@fclose($fileHandle);
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}
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/**
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* Reads one or several bytes.
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* @param resource $fileHandle to read from
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* @param int $byteCount to be read
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* @return string bytes
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*/
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protected function readBytes($fileHandle, $byteCount = 1)
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{
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if ($byteCount > 0) {
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return fread($fileHandle, $byteCount);
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}
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return null;
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}
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/**
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* Write bytes.
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* @param resource $fileHandle to write to
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* @param string $bytes to be written
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* @return int how many bytes are written
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*/
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protected function writeBytes($fileHandle, $bytes)
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{
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return fwrite($fileHandle, $bytes);
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}
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/**
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* Reads a 4-byte integer.
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* @param resource $fileHandle to read from
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* @return int the result
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*/
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protected function readInteger($fileHandle)
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{
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$array = unpack($this->useBigEndian ? 'N' : 'V', $this->readBytes($fileHandle, 4));
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return current($array);
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}
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/**
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* Writes a 4-byte integer.
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* @param resource $fileHandle to write to
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* @param int $integer to be written
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* @return int how many bytes are written
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*/
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protected function writeInteger($fileHandle, $integer)
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{
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return $this->writeBytes($fileHandle, pack($this->useBigEndian ? 'N' : 'V', (int) $integer));
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}
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/**
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* Reads a string.
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* @param resource $fileHandle file handle
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* @param int $length of the string
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* @param int $offset of the string in the file. If null, it reads from the current position.
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* @return string the result
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*/
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protected function readString($fileHandle, $length, $offset = null)
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{
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if ($offset !== null) {
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fseek($fileHandle, $offset);
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}
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return $this->readBytes($fileHandle, $length);
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}
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/**
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* Writes a string.
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* @param resource $fileHandle to write to
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* @param string $string to be written
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* @return int how many bytes are written
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*/
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protected function writeString($fileHandle, $string)
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{
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return $this->writeBytes($fileHandle, $string . "\0");
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}
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}
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