PK       ! ᒖN'  N'    translations.phpnu �[���        <?php
/**
 * Class for a set of entries for translation and their associated headers
 *
 * @version $Id: translations.php 1157 2015-11-20 04:30:11Z dd32 $
 * @package pomo
 * @subpackage translations
 */

require_once __DIR__ . '/plural-forms.php';
require_once __DIR__ . '/entry.php';

if ( ! class_exists( 'Translations', false ) ) :
	#[AllowDynamicProperties]
	class Translations {
		public $entries = array();
		public $headers = array();

		/**
		 * Add entry to the PO structure
		 *
		 * @param array|Translation_Entry $entry
		 * @return bool true on success, false if the entry doesn't have a key
		 */
		public function add_entry( $entry ) {
			if ( is_array( $entry ) ) {
				$entry = new Translation_Entry( $entry );
			}
			$key = $entry->key();
			if ( false === $key ) {
				return false;
			}
			$this->entries[ $key ] = &$entry;
			return true;
		}

		/**
		 * @param array|Translation_Entry $entry
		 * @return bool
		 */
		public function add_entry_or_merge( $entry ) {
			if ( is_array( $entry ) ) {
				$entry = new Translation_Entry( $entry );
			}
			$key = $entry->key();
			if ( false === $key ) {
				return false;
			}
			if ( isset( $this->entries[ $key ] ) ) {
				$this->entries[ $key ]->merge_with( $entry );
			} else {
				$this->entries[ $key ] = &$entry;
			}
			return true;
		}

		/**
		 * Sets $header PO header to $value
		 *
		 * If the header already exists, it will be overwritten
		 *
		 * TODO: this should be out of this class, it is gettext specific
		 *
		 * @param string $header header name, without trailing :
		 * @param string $value header value, without trailing \n
		 */
		public function set_header( $header, $value ) {
			$this->headers[ $header ] = $value;
		}

		/**
		 * @param array $headers
		 */
		public function set_headers( $headers ) {
			foreach ( $headers as $header => $value ) {
				$this->set_header( $header, $value );
			}
		}

		/**
		 * @param string $header
		 */
		public function get_header( $header ) {
			return isset( $this->headers[ $header ] ) ? $this->headers[ $header ] : false;
		}

		/**
		 * @param Translation_Entry $entry
		 */
		public function translate_entry( &$entry ) {
			$key = $entry->key();
			return isset( $this->entries[ $key ] ) ? $this->entries[ $key ] : false;
		}

		/**
		 * @param string $singular
		 * @param string $context
		 * @return string
		 */
		public function translate( $singular, $context = null ) {
			$entry      = new Translation_Entry(
				array(
					'singular' => $singular,
					'context'  => $context,
				)
			);
			$translated = $this->translate_entry( $entry );
			return ( $translated && ! empty( $translated->translations ) ) ? $translated->translations[0] : $singular;
		}

		/**
		 * Given the number of items, returns the 0-based index of the plural form to use
		 *
		 * Here, in the base Translations class, the common logic for English is implemented:
		 *  0 if there is one element, 1 otherwise
		 *
		 * This function should be overridden by the subclasses. For example MO/PO can derive the logic
		 * from their headers.
		 *
		 * @param int $count number of items
		 */
		public function select_plural_form( $count ) {
			return 1 === (int) $count ? 0 : 1;
		}

		/**
		 * @return int
		 */
		public function get_plural_forms_count() {
			return 2;
		}

		/**
		 * @param string $singular
		 * @param string $plural
		 * @param int    $count
		 * @param string $context
		 */
		public function translate_plural( $singular, $plural, $count, $context = null ) {
			$entry              = new Translation_Entry(
				array(
					'singular' => $singular,
					'plural'   => $plural,
					'context'  => $context,
				)
			);
			$translated         = $this->translate_entry( $entry );
			$index              = $this->select_plural_form( $count );
			$total_plural_forms = $this->get_plural_forms_count();
			if ( $translated && 0 <= $index && $index < $total_plural_forms &&
				is_array( $translated->translations ) &&
				isset( $translated->translations[ $index ] ) ) {
				return $translated->translations[ $index ];
			} else {
				return 1 === (int) $count ? $singular : $plural;
			}
		}

		/**
		 * Merge $other in the current object.
		 *
		 * @param Object $other Another Translation object, whose translations will be merged in this one (passed by reference).
		 */
		public function merge_with( &$other ) {
			foreach ( $other->entries as $entry ) {
				$this->entries[ $entry->key() ] = $entry;
			}
		}

		/**
		 * @param object $other
		 */
		public function merge_originals_with( &$other ) {
			foreach ( $other->entries as $entry ) {
				if ( ! isset( $this->entries[ $entry->key() ] ) ) {
					$this->entries[ $entry->key() ] = $entry;
				} else {
					$this->entries[ $entry->key() ]->merge_with( $entry );
				}
			}
		}
	}

	class Gettext_Translations extends Translations {

		/**
		 * Number of plural forms.
		 *
		 * @var int
		 */
		public $_nplurals;

		/**
		 * Callback to retrieve the plural form.
		 *
		 * @var callable
		 */
		public $_gettext_select_plural_form;

		/**
		 * The gettext implementation of select_plural_form.
		 *
		 * It lives in this class, because there are more than one descendand, which will use it and
		 * they can't share it effectively.
		 *
		 * @param int $count
		 */
		public function gettext_select_plural_form( $count ) {
			if ( ! isset( $this->_gettext_select_plural_form ) || is_null( $this->_gettext_select_plural_form ) ) {
				list( $nplurals, $expression )     = $this->nplurals_and_expression_from_header( $this->get_header( 'Plural-Forms' ) );
				$this->_nplurals                   = $nplurals;
				$this->_gettext_select_plural_form = $this->make_plural_form_function( $nplurals, $expression );
			}
			return call_user_func( $this->_gettext_select_plural_form, $count );
		}

		/**
		 * @param string $header
		 * @return array
		 */
		public function nplurals_and_expression_from_header( $header ) {
			if ( preg_match( '/^\s*nplurals\s*=\s*(\d+)\s*;\s+plural\s*=\s*(.+)$/', $header, $matches ) ) {
				$nplurals   = (int) $matches[1];
				$expression = trim( $matches[2] );
				return array( $nplurals, $expression );
			} else {
				return array( 2, 'n != 1' );
			}
		}

		/**
		 * Makes a function, which will return the right translation index, according to the
		 * plural forms header
		 *
		 * @param int    $nplurals
		 * @param string $expression
		 */
		public function make_plural_form_function( $nplurals, $expression ) {
			try {
				$handler = new Plural_Forms( rtrim( $expression, ';' ) );
				return array( $handler, 'get' );
			} catch ( Exception $e ) {
				// Fall back to default plural-form function.
				return $this->make_plural_form_function( 2, 'n != 1' );
			}
		}

		/**
		 * Adds parentheses to the inner parts of ternary operators in
		 * plural expressions, because PHP evaluates ternary oerators from left to right
		 *
		 * @param string $expression the expression without parentheses
		 * @return string the expression with parentheses added
		 */
		public function parenthesize_plural_exression( $expression ) {
			$expression .= ';';
			$res         = '';
			$depth       = 0;
			for ( $i = 0; $i < strlen( $expression ); ++$i ) {
				$char = $expression[ $i ];
				switch ( $char ) {
					case '?':
						$res .= ' ? (';
						++$depth;
						break;
					case ':':
						$res .= ') : (';
						break;
					case ';':
						$res  .= str_repeat( ')', $depth ) . ';';
						$depth = 0;
						break;
					default:
						$res .= $char;
				}
			}
			return rtrim( $res, ';' );
		}

		/**
		 * @param string $translation
		 * @return array
		 */
		public function make_headers( $translation ) {
			$headers = array();
			// Sometimes \n's are used instead of real new lines.
			$translation = str_replace( '\n', "\n", $translation );
			$lines       = explode( "\n", $translation );
			foreach ( $lines as $line ) {
				$parts = explode( ':', $line, 2 );
				if ( ! isset( $parts[1] ) ) {
					continue;
				}
				$headers[ trim( $parts[0] ) ] = trim( $parts[1] );
			}
			return $headers;
		}

		/**
		 * @param string $header
		 * @param string $value
		 */
		public function set_header( $header, $value ) {
			parent::set_header( $header, $value );
			if ( 'Plural-Forms' === $header ) {
				list( $nplurals, $expression )     = $this->nplurals_and_expression_from_header( $this->get_header( 'Plural-Forms' ) );
				$this->_nplurals                   = $nplurals;
				$this->_gettext_select_plural_form = $this->make_plural_form_function( $nplurals, $expression );
			}
		}
	}
endif;

if ( ! class_exists( 'NOOP_Translations', false ) ) :
	/**
	 * Provides the same interface as Translations, but doesn't do anything
	 */
	#[AllowDynamicProperties]
	class NOOP_Translations {
		public $entries = array();
		public $headers = array();

		public function add_entry( $entry ) {
			return true;
		}

		/**
		 * @param string $header
		 * @param string $value
		 */
		public function set_header( $header, $value ) {
		}

		/**
		 * @param array $headers
		 */
		public function set_headers( $headers ) {
		}

		/**
		 * @param string $header
		 * @return false
		 */
		public function get_header( $header ) {
			return false;
		}

		/**
		 * @param Translation_Entry $entry
		 * @return false
		 */
		public function translate_entry( &$entry ) {
			return false;
		}

		/**
		 * @param string $singular
		 * @param string $context
		 */
		public function translate( $singular, $context = null ) {
			return $singular;
		}

		/**
		 * @param int $count
		 * @return bool
		 */
		public function select_plural_form( $count ) {
			return 1 === (int) $count ? 0 : 1;
		}

		/**
		 * @return int
		 */
		public function get_plural_forms_count() {
			return 2;
		}

		/**
		 * @param string $singular
		 * @param string $plural
		 * @param int    $count
		 * @param string $context
		 */
		public function translate_plural( $singular, $plural, $count, $context = null ) {
			return 1 === (int) $count ? $singular : $plural;
		}

		/**
		 * @param object $other
		 */
		public function merge_with( &$other ) {
		}
	}
endif;
PK       ! �b��;  �;    po.phpnu �[���        <?php
/**
 * Class for working with PO files
 *
 * @version $Id: po.php 1158 2015-11-20 04:31:23Z dd32 $
 * @package pomo
 * @subpackage po
 */

require_once __DIR__ . '/translations.php';

if ( ! defined( 'PO_MAX_LINE_LEN' ) ) {
	define( 'PO_MAX_LINE_LEN', 79 );
}

/*
 * The `auto_detect_line_endings` setting has been deprecated in PHP 8.1,
 * but will continue to work until PHP 9.0.
 * For now, we're silencing the deprecation notice as there may still be
 * translation files around which haven't been updated in a long time and
 * which still use the old MacOS standalone `\r` as a line ending.
 * This fix should be revisited when PHP 9.0 is in alpha/beta.
 */
@ini_set( 'auto_detect_line_endings', 1 ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged

/**
 * Routines for working with PO files
 */
if ( ! class_exists( 'PO', false ) ) :
	class PO extends Gettext_Translations {

		public $comments_before_headers = '';

		/**
		 * Exports headers to a PO entry
		 *
		 * @return string msgid/msgstr PO entry for this PO file headers, doesn't contain newline at the end
		 */
		public function export_headers() {
			$header_string = '';
			foreach ( $this->headers as $header => $value ) {
				$header_string .= "$header: $value\n";
			}
			$poified = PO::poify( $header_string );
			if ( $this->comments_before_headers ) {
				$before_headers = $this->prepend_each_line( rtrim( $this->comments_before_headers ) . "\n", '# ' );
			} else {
				$before_headers = '';
			}
			return rtrim( "{$before_headers}msgid \"\"\nmsgstr $poified" );
		}

		/**
		 * Exports all entries to PO format
		 *
		 * @return string sequence of mgsgid/msgstr PO strings, doesn't containt newline at the end
		 */
		public function export_entries() {
			// TODO: Sorting.
			return implode( "\n\n", array_map( array( 'PO', 'export_entry' ), $this->entries ) );
		}

		/**
		 * Exports the whole PO file as a string
		 *
		 * @param bool $include_headers whether to include the headers in the export
		 * @return string ready for inclusion in PO file string for headers and all the enrtries
		 */
		public function export( $include_headers = true ) {
			$res = '';
			if ( $include_headers ) {
				$res .= $this->export_headers();
				$res .= "\n\n";
			}
			$res .= $this->export_entries();
			return $res;
		}

		/**
		 * Same as {@link export}, but writes the result to a file
		 *
		 * @param string $filename        Where to write the PO string.
		 * @param bool   $include_headers Whether to include the headers in the export.
		 * @return bool true on success, false on error
		 */
		public function export_to_file( $filename, $include_headers = true ) {
			$fh = fopen( $filename, 'w' );
			if ( false === $fh ) {
				return false;
			}
			$export = $this->export( $include_headers );
			$res    = fwrite( $fh, $export );
			if ( false === $res ) {
				return false;
			}
			return fclose( $fh );
		}

		/**
		 * Text to include as a comment before the start of the PO contents
		 *
		 * Doesn't need to include # in the beginning of lines, these are added automatically
		 *
		 * @param string $text Text to include as a comment.
		 */
		public function set_comment_before_headers( $text ) {
			$this->comments_before_headers = $text;
		}

		/**
		 * Formats a string in PO-style
		 *
		 * @param string $input_string the string to format
		 * @return string the poified string
		 */
		public static function poify( $input_string ) {
			$quote   = '"';
			$slash   = '\\';
			$newline = "\n";

			$replaces = array(
				"$slash" => "$slash$slash",
				"$quote" => "$slash$quote",
				"\t"     => '\t',
			);

			$input_string = str_replace( array_keys( $replaces ), array_values( $replaces ), $input_string );

			$po = $quote . implode( "{$slash}n{$quote}{$newline}{$quote}", explode( $newline, $input_string ) ) . $quote;
			// Add empty string on first line for readbility.
			if ( str_contains( $input_string, $newline ) &&
				( substr_count( $input_string, $newline ) > 1 || substr( $input_string, -strlen( $newline ) ) !== $newline ) ) {
				$po = "$quote$quote$newline$po";
			}
			// Remove empty strings.
			$po = str_replace( "$newline$quote$quote", '', $po );
			return $po;
		}

		/**
		 * Gives back the original string from a PO-formatted string
		 *
		 * @param string $input_string PO-formatted string
		 * @return string enascaped string
		 */
		public static function unpoify( $input_string ) {
			$escapes               = array(
				't'  => "\t",
				'n'  => "\n",
				'r'  => "\r",
				'\\' => '\\',
			);
			$lines                 = array_map( 'trim', explode( "\n", $input_string ) );
			$lines                 = array_map( array( 'PO', 'trim_quotes' ), $lines );
			$unpoified             = '';
			$previous_is_backslash = false;
			foreach ( $lines as $line ) {
				preg_match_all( '/./u', $line, $chars );
				$chars = $chars[0];
				foreach ( $chars as $char ) {
					if ( ! $previous_is_backslash ) {
						if ( '\\' === $char ) {
							$previous_is_backslash = true;
						} else {
							$unpoified .= $char;
						}
					} else {
						$previous_is_backslash = false;
						$unpoified            .= isset( $escapes[ $char ] ) ? $escapes[ $char ] : $char;
					}
				}
			}

			// Standardize the line endings on imported content, technically PO files shouldn't contain \r.
			$unpoified = str_replace( array( "\r\n", "\r" ), "\n", $unpoified );

			return $unpoified;
		}

		/**
		 * Inserts $with in the beginning of every new line of $input_string and
		 * returns the modified string
		 *
		 * @param string $input_string prepend lines in this string
		 * @param string $with         prepend lines with this string
		 */
		public static function prepend_each_line( $input_string, $with ) {
			$lines  = explode( "\n", $input_string );
			$append = '';
			if ( "\n" === substr( $input_string, -1 ) && '' === end( $lines ) ) {
				/*
				 * Last line might be empty because $input_string was terminated
				 * with a newline, remove it from the $lines array,
				 * we'll restore state by re-terminating the string at the end.
				 */
				array_pop( $lines );
				$append = "\n";
			}
			foreach ( $lines as &$line ) {
				$line = $with . $line;
			}
			unset( $line );
			return implode( "\n", $lines ) . $append;
		}

		/**
		 * Prepare a text as a comment -- wraps the lines and prepends #
		 * and a special character to each line
		 *
		 * @access private
		 * @param string $text the comment text
		 * @param string $char character to denote a special PO comment,
		 *  like :, default is a space
		 */
		public static function comment_block( $text, $char = ' ' ) {
			$text = wordwrap( $text, PO_MAX_LINE_LEN - 3 );
			return PO::prepend_each_line( $text, "#$char " );
		}

		/**
		 * Builds a string from the entry for inclusion in PO file
		 *
		 * @param Translation_Entry $entry the entry to convert to po string.
		 * @return string|false PO-style formatted string for the entry or
		 *  false if the entry is empty
		 */
		public static function export_entry( $entry ) {
			if ( null === $entry->singular || '' === $entry->singular ) {
				return false;
			}
			$po = array();
			if ( ! empty( $entry->translator_comments ) ) {
				$po[] = PO::comment_block( $entry->translator_comments );
			}
			if ( ! empty( $entry->extracted_comments ) ) {
				$po[] = PO::comment_block( $entry->extracted_comments, '.' );
			}
			if ( ! empty( $entry->references ) ) {
				$po[] = PO::comment_block( implode( ' ', $entry->references ), ':' );
			}
			if ( ! empty( $entry->flags ) ) {
				$po[] = PO::comment_block( implode( ', ', $entry->flags ), ',' );
			}
			if ( $entry->context ) {
				$po[] = 'msgctxt ' . PO::poify( $entry->context );
			}
			$po[] = 'msgid ' . PO::poify( $entry->singular );
			if ( ! $entry->is_plural ) {
				$translation = empty( $entry->translations ) ? '' : $entry->translations[0];
				$translation = PO::match_begin_and_end_newlines( $translation, $entry->singular );
				$po[]        = 'msgstr ' . PO::poify( $translation );
			} else {
				$po[]         = 'msgid_plural ' . PO::poify( $entry->plural );
				$translations = empty( $entry->translations ) ? array( '', '' ) : $entry->translations;
				foreach ( $translations as $i => $translation ) {
					$translation = PO::match_begin_and_end_newlines( $translation, $entry->plural );
					$po[]        = "msgstr[$i] " . PO::poify( $translation );
				}
			}
			return implode( "\n", $po );
		}

		public static function match_begin_and_end_newlines( $translation, $original ) {
			if ( '' === $translation ) {
				return $translation;
			}

			$original_begin    = "\n" === substr( $original, 0, 1 );
			$original_end      = "\n" === substr( $original, -1 );
			$translation_begin = "\n" === substr( $translation, 0, 1 );
			$translation_end   = "\n" === substr( $translation, -1 );

			if ( $original_begin ) {
				if ( ! $translation_begin ) {
					$translation = "\n" . $translation;
				}
			} elseif ( $translation_begin ) {
				$translation = ltrim( $translation, "\n" );
			}

			if ( $original_end ) {
				if ( ! $translation_end ) {
					$translation .= "\n";
				}
			} elseif ( $translation_end ) {
				$translation = rtrim( $translation, "\n" );
			}

			return $translation;
		}

		/**
		 * @param string $filename
		 * @return bool
		 */
		public function import_from_file( $filename ) {
			$f = fopen( $filename, 'r' );
			if ( ! $f ) {
				return false;
			}
			$lineno = 0;
			while ( true ) {
				$res = $this->read_entry( $f, $lineno );
				if ( ! $res ) {
					break;
				}
				if ( '' === $res['entry']->singular ) {
					$this->set_headers( $this->make_headers( $res['entry']->translations[0] ) );
				} else {
					$this->add_entry( $res['entry'] );
				}
			}
			PO::read_line( $f, 'clear' );
			if ( false === $res ) {
				return false;
			}
			if ( ! $this->headers && ! $this->entries ) {
				return false;
			}
			return true;
		}

		/**
		 * Helper function for read_entry
		 *
		 * @param string $context
		 * @return bool
		 */
		protected static function is_final( $context ) {
			return ( 'msgstr' === $context ) || ( 'msgstr_plural' === $context );
		}

		/**
		 * @param resource $f
		 * @param int      $lineno
		 * @return null|false|array
		 */
		public function read_entry( $f, $lineno = 0 ) {
			$entry = new Translation_Entry();
			// Where were we in the last step.
			// Can be: comment, msgctxt, msgid, msgid_plural, msgstr, msgstr_plural.
			$context      = '';
			$msgstr_index = 0;
			while ( true ) {
				++$lineno;
				$line = PO::read_line( $f );
				if ( ! $line ) {
					if ( feof( $f ) ) {
						if ( self::is_final( $context ) ) {
							break;
						} elseif ( ! $context ) { // We haven't read a line and EOF came.
							return null;
						} else {
							return false;
						}
					} else {
						return false;
					}
				}
				if ( "\n" === $line ) {
					continue;
				}
				$line = trim( $line );
				if ( preg_match( '/^#/', $line, $m ) ) {
					// The comment is the start of a new entry.
					if ( self::is_final( $context ) ) {
						PO::read_line( $f, 'put-back' );
						--$lineno;
						break;
					}
					// Comments have to be at the beginning.
					if ( $context && 'comment' !== $context ) {
						return false;
					}
					// Add comment.
					$this->add_comment_to_entry( $entry, $line );
				} elseif ( preg_match( '/^msgctxt\s+(".*")/', $line, $m ) ) {
					if ( self::is_final( $context ) ) {
						PO::read_line( $f, 'put-back' );
						--$lineno;
						break;
					}
					if ( $context && 'comment' !== $context ) {
						return false;
					}
					$context         = 'msgctxt';
					$entry->context .= PO::unpoify( $m[1] );
				} elseif ( preg_match( '/^msgid\s+(".*")/', $line, $m ) ) {
					if ( self::is_final( $context ) ) {
						PO::read_line( $f, 'put-back' );
						--$lineno;
						break;
					}
					if ( $context && 'msgctxt' !== $context && 'comment' !== $context ) {
						return false;
					}
					$context          = 'msgid';
					$entry->singular .= PO::unpoify( $m[1] );
				} elseif ( preg_match( '/^msgid_plural\s+(".*")/', $line, $m ) ) {
					if ( 'msgid' !== $context ) {
						return false;
					}
					$context          = 'msgid_plural';
					$entry->is_plural = true;
					$entry->plural   .= PO::unpoify( $m[1] );
				} elseif ( preg_match( '/^msgstr\s+(".*")/', $line, $m ) ) {
					if ( 'msgid' !== $context ) {
						return false;
					}
					$context             = 'msgstr';
					$entry->translations = array( PO::unpoify( $m[1] ) );
				} elseif ( preg_match( '/^msgstr\[(\d+)\]\s+(".*")/', $line, $m ) ) {
					if ( 'msgid_plural' !== $context && 'msgstr_plural' !== $context ) {
						return false;
					}
					$context                      = 'msgstr_plural';
					$msgstr_index                 = $m[1];
					$entry->translations[ $m[1] ] = PO::unpoify( $m[2] );
				} elseif ( preg_match( '/^".*"$/', $line ) ) {
					$unpoified = PO::unpoify( $line );
					switch ( $context ) {
						case 'msgid':
							$entry->singular .= $unpoified;
							break;
						case 'msgctxt':
							$entry->context .= $unpoified;
							break;
						case 'msgid_plural':
							$entry->plural .= $unpoified;
							break;
						case 'msgstr':
							$entry->translations[0] .= $unpoified;
							break;
						case 'msgstr_plural':
							$entry->translations[ $msgstr_index ] .= $unpoified;
							break;
						default:
							return false;
					}
				} else {
					return false;
				}
			}

			$have_translations = false;
			foreach ( $entry->translations as $t ) {
				if ( $t || ( '0' === $t ) ) {
					$have_translations = true;
					break;
				}
			}
			if ( false === $have_translations ) {
				$entry->translations = array();
			}

			return array(
				'entry'  => $entry,
				'lineno' => $lineno,
			);
		}

		/**
		 * @param resource $f
		 * @param string   $action
		 * @return bool
		 */
		public function read_line( $f, $action = 'read' ) {
			static $last_line     = '';
			static $use_last_line = false;
			if ( 'clear' === $action ) {
				$last_line = '';
				return true;
			}
			if ( 'put-back' === $action ) {
				$use_last_line = true;
				return true;
			}
			$line          = $use_last_line ? $last_line : fgets( $f );
			$line          = ( "\r\n" === substr( $line, -2 ) ) ? rtrim( $line, "\r\n" ) . "\n" : $line;
			$last_line     = $line;
			$use_last_line = false;
			return $line;
		}

		/**
		 * @param Translation_Entry $entry
		 * @param string            $po_comment_line
		 */
		public function add_comment_to_entry( &$entry, $po_comment_line ) {
			$first_two = substr( $po_comment_line, 0, 2 );
			$comment   = trim( substr( $po_comment_line, 2 ) );
			if ( '#:' === $first_two ) {
				$entry->references = array_merge( $entry->references, preg_split( '/\s+/', $comment ) );
			} elseif ( '#.' === $first_two ) {
				$entry->extracted_comments = trim( $entry->extracted_comments . "\n" . $comment );
			} elseif ( '#,' === $first_two ) {
				$entry->flags = array_merge( $entry->flags, preg_split( '/,\s*/', $comment ) );
			} else {
				$entry->translator_comments = trim( $entry->translator_comments . "\n" . $comment );
			}
		}

		/**
		 * @param string $s
		 * @return string
		 */
		public static function trim_quotes( $s ) {
			if ( str_starts_with( $s, '"' ) ) {
				$s = substr( $s, 1 );
			}
			if ( str_ends_with( $s, '"' ) ) {
				$s = substr( $s, 0, -1 );
			}
			return $s;
		}
	}
endif;
PK       ! �u
]  ]  	  entry.phpnu �[���        <?php
/**
 * Contains Translation_Entry class
 *
 * @version $Id: entry.php 1157 2015-11-20 04:30:11Z dd32 $
 * @package pomo
 * @subpackage entry
 */

if ( ! class_exists( 'Translation_Entry', false ) ) :
	/**
	 * Translation_Entry class encapsulates a translatable string.
	 */
	#[AllowDynamicProperties]
	class Translation_Entry {

		/**
		 * Whether the entry contains a string and its plural form, default is false.
		 *
		 * @var bool
		 */
		public $is_plural = false;

		public $context             = null;
		public $singular            = null;
		public $plural              = null;
		public $translations        = array();
		public $translator_comments = '';
		public $extracted_comments  = '';
		public $references          = array();
		public $flags               = array();

		/**
		 * @param array $args {
		 *     Arguments array, supports the following keys:
		 *
		 *     @type string $singular            The string to translate, if omitted an
		 *                                       empty entry will be created.
		 *     @type string $plural              The plural form of the string, setting
		 *                                       this will set `$is_plural` to true.
		 *     @type array  $translations        Translations of the string and possibly
		 *                                       its plural forms.
		 *     @type string $context             A string differentiating two equal strings
		 *                                       used in different contexts.
		 *     @type string $translator_comments Comments left by translators.
		 *     @type string $extracted_comments  Comments left by developers.
		 *     @type array  $references          Places in the code this string is used, in
		 *                                       relative_to_root_path/file.php:linenum form.
		 *     @type array  $flags               Flags like php-format.
		 * }
		 */
		public function __construct( $args = array() ) {
			// If no singular -- empty object.
			if ( ! isset( $args['singular'] ) ) {
				return;
			}
			// Get member variable values from args hash.
			foreach ( $args as $varname => $value ) {
				$this->$varname = $value;
			}
			if ( isset( $args['plural'] ) && $args['plural'] ) {
				$this->is_plural = true;
			}
			if ( ! is_array( $this->translations ) ) {
				$this->translations = array();
			}
			if ( ! is_array( $this->references ) ) {
				$this->references = array();
			}
			if ( ! is_array( $this->flags ) ) {
				$this->flags = array();
			}
		}

		/**
		 * PHP4 constructor.
		 *
		 * @deprecated 5.4.0 Use __construct() instead.
		 *
		 * @see Translation_Entry::__construct()
		 */
		public function Translation_Entry( $args = array() ) {
			_deprecated_constructor( self::class, '5.4.0', static::class );
			self::__construct( $args );
		}

		/**
		 * Generates a unique key for this entry.
		 *
		 * @return string|false The key or false if the entry is null.
		 */
		public function key() {
			if ( null === $this->singular ) {
				return false;
			}

			// Prepend context and EOT, like in MO files.
			$key = ! $this->context ? $this->singular : $this->context . "\4" . $this->singular;
			// Standardize on \n line endings.
			$key = str_replace( array( "\r\n", "\r" ), "\n", $key );

			return $key;
		}

		/**
		 * @param object $other
		 */
		public function merge_with( &$other ) {
			$this->flags      = array_unique( array_merge( $this->flags, $other->flags ) );
			$this->references = array_unique( array_merge( $this->references, $other->references ) );
			if ( $this->extracted_comments !== $other->extracted_comments ) {
				$this->extracted_comments .= $other->extracted_comments;
			}
		}
	}
endif;
PK       !  �+/�  �    plural-forms.phpnu �[���        <?php

/**
 * A gettext Plural-Forms parser.
 *
 * @since 4.9.0
 */
if ( ! class_exists( 'Plural_Forms', false ) ) :
	#[AllowDynamicProperties]
	class Plural_Forms {
		/**
		 * Operator characters.
		 *
		 * @since 4.9.0
		 * @var string OP_CHARS Operator characters.
		 */
		const OP_CHARS = '|&><!=%?:';

		/**
		 * Valid number characters.
		 *
		 * @since 4.9.0
		 * @var string NUM_CHARS Valid number characters.
		 */
		const NUM_CHARS = '0123456789';

		/**
		 * Operator precedence.
		 *
		 * Operator precedence from highest to lowest. Higher numbers indicate
		 * higher precedence, and are executed first.
		 *
		 * @see https://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B#Operator_precedence
		 *
		 * @since 4.9.0
		 * @var array $op_precedence Operator precedence from highest to lowest.
		 */
		protected static $op_precedence = array(
			'%'  => 6,

			'<'  => 5,
			'<=' => 5,
			'>'  => 5,
			'>=' => 5,

			'==' => 4,
			'!=' => 4,

			'&&' => 3,

			'||' => 2,

			'?:' => 1,
			'?'  => 1,

			'('  => 0,
			')'  => 0,
		);

		/**
		 * Tokens generated from the string.
		 *
		 * @since 4.9.0
		 * @var array $tokens List of tokens.
		 */
		protected $tokens = array();

		/**
		 * Cache for repeated calls to the function.
		 *
		 * @since 4.9.0
		 * @var array $cache Map of $n => $result
		 */
		protected $cache = array();

		/**
		 * Constructor.
		 *
		 * @since 4.9.0
		 *
		 * @param string $str Plural function (just the bit after `plural=` from Plural-Forms)
		 */
		public function __construct( $str ) {
			$this->parse( $str );
		}

		/**
		 * Parse a Plural-Forms string into tokens.
		 *
		 * Uses the shunting-yard algorithm to convert the string to Reverse Polish
		 * Notation tokens.
		 *
		 * @since 4.9.0
		 *
		 * @throws Exception If there is a syntax or parsing error with the string.
		 *
		 * @param string $str String to parse.
		 */
		protected function parse( $str ) {
			$pos = 0;
			$len = strlen( $str );

			// Convert infix operators to postfix using the shunting-yard algorithm.
			$output = array();
			$stack  = array();
			while ( $pos < $len ) {
				$next = substr( $str, $pos, 1 );

				switch ( $next ) {
					// Ignore whitespace.
					case ' ':
					case "\t":
						++$pos;
						break;

					// Variable (n).
					case 'n':
						$output[] = array( 'var' );
						++$pos;
						break;

					// Parentheses.
					case '(':
						$stack[] = $next;
						++$pos;
						break;

					case ')':
						$found = false;
						while ( ! empty( $stack ) ) {
							$o2 = $stack[ count( $stack ) - 1 ];
							if ( '(' !== $o2 ) {
								$output[] = array( 'op', array_pop( $stack ) );
								continue;
							}

							// Discard open paren.
							array_pop( $stack );
							$found = true;
							break;
						}

						if ( ! $found ) {
							throw new Exception( 'Mismatched parentheses' );
						}

						++$pos;
						break;

					// Operators.
					case '|':
					case '&':
					case '>':
					case '<':
					case '!':
					case '=':
					case '%':
					case '?':
						$end_operator = strspn( $str, self::OP_CHARS, $pos );
						$operator     = substr( $str, $pos, $end_operator );
						if ( ! array_key_exists( $operator, self::$op_precedence ) ) {
							throw new Exception( sprintf( 'Unknown operator "%s"', $operator ) );
						}

						while ( ! empty( $stack ) ) {
							$o2 = $stack[ count( $stack ) - 1 ];

							// Ternary is right-associative in C.
							if ( '?:' === $operator || '?' === $operator ) {
								if ( self::$op_precedence[ $operator ] >= self::$op_precedence[ $o2 ] ) {
									break;
								}
							} elseif ( self::$op_precedence[ $operator ] > self::$op_precedence[ $o2 ] ) {
								break;
							}

							$output[] = array( 'op', array_pop( $stack ) );
						}
						$stack[] = $operator;

						$pos += $end_operator;
						break;

					// Ternary "else".
					case ':':
						$found = false;
						$s_pos = count( $stack ) - 1;
						while ( $s_pos >= 0 ) {
							$o2 = $stack[ $s_pos ];
							if ( '?' !== $o2 ) {
								$output[] = array( 'op', array_pop( $stack ) );
								--$s_pos;
								continue;
							}

							// Replace.
							$stack[ $s_pos ] = '?:';
							$found           = true;
							break;
						}

						if ( ! $found ) {
							throw new Exception( 'Missing starting "?" ternary operator' );
						}
						++$pos;
						break;

					// Default - number or invalid.
					default:
						if ( $next >= '0' && $next <= '9' ) {
							$span     = strspn( $str, self::NUM_CHARS, $pos );
							$output[] = array( 'value', intval( substr( $str, $pos, $span ) ) );
							$pos     += $span;
							break;
						}

						throw new Exception( sprintf( 'Unknown symbol "%s"', $next ) );
				}
			}

			while ( ! empty( $stack ) ) {
				$o2 = array_pop( $stack );
				if ( '(' === $o2 || ')' === $o2 ) {
					throw new Exception( 'Mismatched parentheses' );
				}

				$output[] = array( 'op', $o2 );
			}

			$this->tokens = $output;
		}

		/**
		 * Get the plural form for a number.
		 *
		 * Caches the value for repeated calls.
		 *
		 * @since 4.9.0
		 *
		 * @param int $num Number to get plural form for.
		 * @return int Plural form value.
		 */
		public function get( $num ) {
			if ( isset( $this->cache[ $num ] ) ) {
				return $this->cache[ $num ];
			}
			$this->cache[ $num ] = $this->execute( $num );
			return $this->cache[ $num ];
		}

		/**
		 * Execute the plural form function.
		 *
		 * @since 4.9.0
		 *
		 * @throws Exception If the plural form value cannot be calculated.
		 *
		 * @param int $n Variable "n" to substitute.
		 * @return int Plural form value.
		 */
		public function execute( $n ) {
			$stack = array();
			$i     = 0;
			$total = count( $this->tokens );
			while ( $i < $total ) {
				$next = $this->tokens[ $i ];
				++$i;
				if ( 'var' === $next[0] ) {
					$stack[] = $n;
					continue;
				} elseif ( 'value' === $next[0] ) {
					$stack[] = $next[1];
					continue;
				}

				// Only operators left.
				switch ( $next[1] ) {
					case '%':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 % $v2;
						break;

					case '||':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 || $v2;
						break;

					case '&&':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 && $v2;
						break;

					case '<':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 < $v2;
						break;

					case '<=':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 <= $v2;
						break;

					case '>':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 > $v2;
						break;

					case '>=':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 >= $v2;
						break;

					case '!=':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 != $v2;
						break;

					case '==':
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 == $v2;
						break;

					case '?:':
						$v3      = array_pop( $stack );
						$v2      = array_pop( $stack );
						$v1      = array_pop( $stack );
						$stack[] = $v1 ? $v2 : $v3;
						break;

					default:
						throw new Exception( sprintf( 'Unknown operator "%s"', $next[1] ) );
				}
			}

			if ( count( $stack ) !== 1 ) {
				throw new Exception( 'Too many values remaining on the stack' );
			}

			return (int) $stack[0];
		}
	}
endif;
PK       ! b���  �    streams.phpnu �[���        <?php
/**
 * Classes, which help reading streams of data from files.
 * Based on the classes from Danilo Segan <danilo@kvota.net>
 *
 * @version $Id: streams.php 1157 2015-11-20 04:30:11Z dd32 $
 * @package pomo
 * @subpackage streams
 */

if ( ! class_exists( 'POMO_Reader', false ) ) :
	#[AllowDynamicProperties]
	class POMO_Reader {

		public $endian = 'little';
		public $_pos;
		public $is_overloaded;

		/**
		 * PHP5 constructor.
		 */
		public function __construct() {
			if ( function_exists( 'mb_substr' )
				&& ( (int) ini_get( 'mbstring.func_overload' ) & 2 ) // phpcs:ignore PHPCompatibility.IniDirectives.RemovedIniDirectives.mbstring_func_overloadDeprecated
			) {
				$this->is_overloaded = true;
			} else {
				$this->is_overloaded = false;
			}

			$this->_pos = 0;
		}

		/**
		 * PHP4 constructor.
		 *
		 * @deprecated 5.4.0 Use __construct() instead.
		 *
		 * @see POMO_Reader::__construct()
		 */
		public function POMO_Reader() {
			_deprecated_constructor( self::class, '5.4.0', static::class );
			self::__construct();
		}

		/**
		 * Sets the endianness of the file.
		 *
		 * @param string $endian Set the endianness of the file. Accepts 'big', or 'little'.
		 */
		public function setEndian( $endian ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
			$this->endian = $endian;
		}

		/**
		 * Reads a 32bit Integer from the Stream
		 *
		 * @return mixed The integer, corresponding to the next 32 bits from
		 *  the stream of false if there are not enough bytes or on error
		 */
		public function readint32() {
			$bytes = $this->read( 4 );
			if ( 4 !== $this->strlen( $bytes ) ) {
				return false;
			}
			$endian_letter = ( 'big' === $this->endian ) ? 'N' : 'V';
			$int           = unpack( $endian_letter, $bytes );
			return reset( $int );
		}

		/**
		 * Reads an array of 32-bit Integers from the Stream
		 *
		 * @param int $count How many elements should be read
		 * @return mixed Array of integers or false if there isn't
		 *  enough data or on error
		 */
		public function readint32array( $count ) {
			$bytes = $this->read( 4 * $count );
			if ( 4 * $count !== $this->strlen( $bytes ) ) {
				return false;
			}
			$endian_letter = ( 'big' === $this->endian ) ? 'N' : 'V';
			return unpack( $endian_letter . $count, $bytes );
		}

		/**
		 * @param string $input_string
		 * @param int    $start
		 * @param int    $length
		 * @return string
		 */
		public function substr( $input_string, $start, $length ) {
			if ( $this->is_overloaded ) {
				return mb_substr( $input_string, $start, $length, 'ascii' );
			} else {
				return substr( $input_string, $start, $length );
			}
		}

		/**
		 * @param string $input_string
		 * @return int
		 */
		public function strlen( $input_string ) {
			if ( $this->is_overloaded ) {
				return mb_strlen( $input_string, 'ascii' );
			} else {
				return strlen( $input_string );
			}
		}

		/**
		 * @param string $input_string
		 * @param int    $chunk_size
		 * @return array
		 */
		public function str_split( $input_string, $chunk_size ) {
			if ( ! function_exists( 'str_split' ) ) {
				$length = $this->strlen( $input_string );
				$out    = array();
				for ( $i = 0; $i < $length; $i += $chunk_size ) {
					$out[] = $this->substr( $input_string, $i, $chunk_size );
				}
				return $out;
			} else {
				return str_split( $input_string, $chunk_size );
			}
		}

		/**
		 * @return int
		 */
		public function pos() {
			return $this->_pos;
		}

		/**
		 * @return true
		 */
		public function is_resource() {
			return true;
		}

		/**
		 * @return true
		 */
		public function close() {
			return true;
		}
	}
endif;

if ( ! class_exists( 'POMO_FileReader', false ) ) :
	class POMO_FileReader extends POMO_Reader {

		/**
		 * File pointer resource.
		 *
		 * @var resource|false
		 */
		public $_f;

		/**
		 * @param string $filename
		 */
		public function __construct( $filename ) {
			parent::__construct();
			$this->_f = fopen( $filename, 'rb' );
		}

		/**
		 * PHP4 constructor.
		 *
		 * @deprecated 5.4.0 Use __construct() instead.
		 *
		 * @see POMO_FileReader::__construct()
		 */
		public function POMO_FileReader( $filename ) {
			_deprecated_constructor( self::class, '5.4.0', static::class );
			self::__construct( $filename );
		}

		/**
		 * @param int $bytes
		 * @return string|false Returns read string, otherwise false.
		 */
		public function read( $bytes ) {
			return fread( $this->_f, $bytes );
		}

		/**
		 * @param int $pos
		 * @return bool
		 */
		public function seekto( $pos ) {
			if ( -1 === fseek( $this->_f, $pos, SEEK_SET ) ) {
				return false;
			}
			$this->_pos = $pos;
			return true;
		}

		/**
		 * @return bool
		 */
		public function is_resource() {
			return is_resource( $this->_f );
		}

		/**
		 * @return bool
		 */
		public function feof() {
			return feof( $this->_f );
		}

		/**
		 * @return bool
		 */
		public function close() {
			return fclose( $this->_f );
		}

		/**
		 * @return string
		 */
		public function read_all() {
			return stream_get_contents( $this->_f );
		}
	}
endif;

if ( ! class_exists( 'POMO_StringReader', false ) ) :
	/**
	 * Provides file-like methods for manipulating a string instead
	 * of a physical file.
	 */
	class POMO_StringReader extends POMO_Reader {

		public $_str = '';

		/**
		 * PHP5 constructor.
		 */
		public function __construct( $str = '' ) {
			parent::__construct();
			$this->_str = $str;
			$this->_pos = 0;
		}

		/**
		 * PHP4 constructor.
		 *
		 * @deprecated 5.4.0 Use __construct() instead.
		 *
		 * @see POMO_StringReader::__construct()
		 */
		public function POMO_StringReader( $str = '' ) {
			_deprecated_constructor( self::class, '5.4.0', static::class );
			self::__construct( $str );
		}

		/**
		 * @param string $bytes
		 * @return string
		 */
		public function read( $bytes ) {
			$data        = $this->substr( $this->_str, $this->_pos, $bytes );
			$this->_pos += $bytes;
			if ( $this->strlen( $this->_str ) < $this->_pos ) {
				$this->_pos = $this->strlen( $this->_str );
			}
			return $data;
		}

		/**
		 * @param int $pos
		 * @return int
		 */
		public function seekto( $pos ) {
			$this->_pos = $pos;
			if ( $this->strlen( $this->_str ) < $this->_pos ) {
				$this->_pos = $this->strlen( $this->_str );
			}
			return $this->_pos;
		}

		/**
		 * @return int
		 */
		public function length() {
			return $this->strlen( $this->_str );
		}

		/**
		 * @return string
		 */
		public function read_all() {
			return $this->substr( $this->_str, $this->_pos, $this->strlen( $this->_str ) );
		}
	}
endif;

if ( ! class_exists( 'POMO_CachedFileReader', false ) ) :
	/**
	 * Reads the contents of the file in the beginning.
	 */
	class POMO_CachedFileReader extends POMO_StringReader {
		/**
		 * PHP5 constructor.
		 */
		public function __construct( $filename ) {
			parent::__construct();
			$this->_str = file_get_contents( $filename );
			if ( false === $this->_str ) {
				return false;
			}
			$this->_pos = 0;
		}

		/**
		 * PHP4 constructor.
		 *
		 * @deprecated 5.4.0 Use __construct() instead.
		 *
		 * @see POMO_CachedFileReader::__construct()
		 */
		public function POMO_CachedFileReader( $filename ) {
			_deprecated_constructor( self::class, '5.4.0', static::class );
			self::__construct( $filename );
		}
	}
endif;

if ( ! class_exists( 'POMO_CachedIntFileReader', false ) ) :
	/**
	 * Reads the contents of the file in the beginning.
	 */
	class POMO_CachedIntFileReader extends POMO_CachedFileReader {
		/**
		 * PHP5 constructor.
		 */
		public function __construct( $filename ) {
			parent::__construct( $filename );
		}

		/**
		 * PHP4 constructor.
		 *
		 * @deprecated 5.4.0 Use __construct() instead.
		 *
		 * @see POMO_CachedIntFileReader::__construct()
		 */
		public function POMO_CachedIntFileReader( $filename ) {
			_deprecated_constructor( self::class, '5.4.0', static::class );
			self::__construct( $filename );
		}
	}
endif;
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/**
 * Class for working with MO files
 *
 * @version $Id: mo.php 1157 2015-11-20 04:30:11Z dd32 $
 * @package pomo
 * @subpackage mo
 */

require_once __DIR__ . '/translations.php';
require_once __DIR__ . '/streams.php';

if ( ! class_exists( 'MO', false ) ) :
	class MO extends Gettext_Translations {

		/**
		 * Number of plural forms.
		 *
		 * @var int
		 */
		public $_nplurals = 2;

		/**
		 * Loaded MO file.
		 *
		 * @var string
		 */
		private $filename = '';

		/**
		 * Returns the loaded MO file.
		 *
		 * @return string The loaded MO file.
		 */
		public function get_filename() {
			return $this->filename;
		}

		/**
		 * Fills up with the entries from MO file $filename
		 *
		 * @param string $filename MO file to load
		 * @return bool True if the import from file was successful, otherwise false.
		 */
		public function import_from_file( $filename ) {
			$reader = new POMO_FileReader( $filename );

			if ( ! $reader->is_resource() ) {
				return false;
			}

			$this->filename = (string) $filename;

			return $this->import_from_reader( $reader );
		}

		/**
		 * @param string $filename
		 * @return bool
		 */
		public function export_to_file( $filename ) {
			$fh = fopen( $filename, 'wb' );
			if ( ! $fh ) {
				return false;
			}
			$res = $this->export_to_file_handle( $fh );
			fclose( $fh );
			return $res;
		}

		/**
		 * @return string|false
		 */
		public function export() {
			$tmp_fh = fopen( 'php://temp', 'r+' );
			if ( ! $tmp_fh ) {
				return false;
			}
			$this->export_to_file_handle( $tmp_fh );
			rewind( $tmp_fh );
			return stream_get_contents( $tmp_fh );
		}

		/**
		 * @param Translation_Entry $entry
		 * @return bool
		 */
		public function is_entry_good_for_export( $entry ) {
			if ( empty( $entry->translations ) ) {
				return false;
			}

			if ( ! array_filter( $entry->translations ) ) {
				return false;
			}

			return true;
		}

		/**
		 * @param resource $fh
		 * @return true
		 */
		public function export_to_file_handle( $fh ) {
			$entries = array_filter( $this->entries, array( $this, 'is_entry_good_for_export' ) );
			ksort( $entries );
			$magic                     = 0x950412de;
			$revision                  = 0;
			$total                     = count( $entries ) + 1; // All the headers are one entry.
			$originals_lengths_addr    = 28;
			$translations_lengths_addr = $originals_lengths_addr + 8 * $total;
			$size_of_hash              = 0;
			$hash_addr                 = $translations_lengths_addr + 8 * $total;
			$current_addr              = $hash_addr;
			fwrite(
				$fh,
				pack(
					'V*',
					$magic,
					$revision,
					$total,
					$originals_lengths_addr,
					$translations_lengths_addr,
					$size_of_hash,
					$hash_addr
				)
			);
			fseek( $fh, $originals_lengths_addr );

			// Headers' msgid is an empty string.
			fwrite( $fh, pack( 'VV', 0, $current_addr ) );
			++$current_addr;
			$originals_table = "\0";

			$reader = new POMO_Reader();

			foreach ( $entries as $entry ) {
				$originals_table .= $this->export_original( $entry ) . "\0";
				$length           = $reader->strlen( $this->export_original( $entry ) );
				fwrite( $fh, pack( 'VV', $length, $current_addr ) );
				$current_addr += $length + 1; // Account for the NULL byte after.
			}

			$exported_headers = $this->export_headers();
			fwrite( $fh, pack( 'VV', $reader->strlen( $exported_headers ), $current_addr ) );
			$current_addr      += strlen( $exported_headers ) + 1;
			$translations_table = $exported_headers . "\0";

			foreach ( $entries as $entry ) {
				$translations_table .= $this->export_translations( $entry ) . "\0";
				$length              = $reader->strlen( $this->export_translations( $entry ) );
				fwrite( $fh, pack( 'VV', $length, $current_addr ) );
				$current_addr += $length + 1;
			}

			fwrite( $fh, $originals_table );
			fwrite( $fh, $translations_table );
			return true;
		}

		/**
		 * @param Translation_Entry $entry
		 * @return string
		 */
		public function export_original( $entry ) {
			// TODO: Warnings for control characters.
			$exported = $entry->singular;
			if ( $entry->is_plural ) {
				$exported .= "\0" . $entry->plural;
			}
			if ( $entry->context ) {
				$exported = $entry->context . "\4" . $exported;
			}
			return $exported;
		}

		/**
		 * @param Translation_Entry $entry
		 * @return string
		 */
		public function export_translations( $entry ) {
			// TODO: Warnings for control characters.
			return $entry->is_plural ? implode( "\0", $entry->translations ) : $entry->translations[0];
		}

		/**
		 * @return string
		 */
		public function export_headers() {
			$exported = '';
			foreach ( $this->headers as $header => $value ) {
				$exported .= "$header: $value\n";
			}
			return $exported;
		}

		/**
		 * @param int $magic
		 * @return string|false
		 */
		public function get_byteorder( $magic ) {
			// The magic is 0x950412de.

			// bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
			$magic_little    = (int) - 1794895138;
			$magic_little_64 = (int) 2500072158;
			// 0xde120495
			$magic_big = ( (int) - 569244523 ) & 0xFFFFFFFF;
			if ( $magic_little === $magic || $magic_little_64 === $magic ) {
				return 'little';
			} elseif ( $magic_big === $magic ) {
				return 'big';
			} else {
				return false;
			}
		}

		/**
		 * @param POMO_FileReader $reader
		 * @return bool True if the import was successful, otherwise false.
		 */
		public function import_from_reader( $reader ) {
			$endian_string = MO::get_byteorder( $reader->readint32() );
			if ( false === $endian_string ) {
				return false;
			}
			$reader->setEndian( $endian_string );

			$endian = ( 'big' === $endian_string ) ? 'N' : 'V';

			$header = $reader->read( 24 );
			if ( $reader->strlen( $header ) !== 24 ) {
				return false;
			}

			// Parse header.
			$header = unpack( "{$endian}revision/{$endian}total/{$endian}originals_lengths_addr/{$endian}translations_lengths_addr/{$endian}hash_length/{$endian}hash_addr", $header );
			if ( ! is_array( $header ) ) {
				return false;
			}

			// Support revision 0 of MO format specs, only.
			if ( 0 !== $header['revision'] ) {
				return false;
			}

			// Seek to data blocks.
			$reader->seekto( $header['originals_lengths_addr'] );

			// Read originals' indices.
			$originals_lengths_length = $header['translations_lengths_addr'] - $header['originals_lengths_addr'];
			if ( $originals_lengths_length !== $header['total'] * 8 ) {
				return false;
			}

			$originals = $reader->read( $originals_lengths_length );
			if ( $reader->strlen( $originals ) !== $originals_lengths_length ) {
				return false;
			}

			// Read translations' indices.
			$translations_lengths_length = $header['hash_addr'] - $header['translations_lengths_addr'];
			if ( $translations_lengths_length !== $header['total'] * 8 ) {
				return false;
			}

			$translations = $reader->read( $translations_lengths_length );
			if ( $reader->strlen( $translations ) !== $translations_lengths_length ) {
				return false;
			}

			// Transform raw data into set of indices.
			$originals    = $reader->str_split( $originals, 8 );
			$translations = $reader->str_split( $translations, 8 );

			// Skip hash table.
			$strings_addr = $header['hash_addr'] + $header['hash_length'] * 4;

			$reader->seekto( $strings_addr );

			$strings = $reader->read_all();
			$reader->close();

			for ( $i = 0; $i < $header['total']; $i++ ) {
				$o = unpack( "{$endian}length/{$endian}pos", $originals[ $i ] );
				$t = unpack( "{$endian}length/{$endian}pos", $translations[ $i ] );
				if ( ! $o || ! $t ) {
					return false;
				}

				// Adjust offset due to reading strings to separate space before.
				$o['pos'] -= $strings_addr;
				$t['pos'] -= $strings_addr;

				$original    = $reader->substr( $strings, $o['pos'], $o['length'] );
				$translation = $reader->substr( $strings, $t['pos'], $t['length'] );

				if ( '' === $original ) {
					$this->set_headers( $this->make_headers( $translation ) );
				} else {
					$entry                          = &$this->make_entry( $original, $translation );
					$this->entries[ $entry->key() ] = &$entry;
				}
			}
			return true;
		}

		/**
		 * Build a Translation_Entry from original string and translation strings,
		 * found in a MO file
		 *
		 * @static
		 * @param string $original original string to translate from MO file. Might contain
		 *  0x04 as context separator or 0x00 as singular/plural separator
		 * @param string $translation translation string from MO file. Might contain
		 *  0x00 as a plural translations separator
		 * @return Translation_Entry Entry instance.
		 */
		public function &make_entry( $original, $translation ) {
			$entry = new Translation_Entry();
			// Look for context, separated by \4.
			$parts = explode( "\4", $original );
			if ( isset( $parts[1] ) ) {
				$original       = $parts[1];
				$entry->context = $parts[0];
			}
			// Look for plural original.
			$parts           = explode( "\0", $original );
			$entry->singular = $parts[0];
			if ( isset( $parts[1] ) ) {
				$entry->is_plural = true;
				$entry->plural    = $parts[1];
			}
			// Plural translations are also separated by \0.
			$entry->translations = explode( "\0", $translation );
			return $entry;
		}

		/**
		 * @param int $count
		 * @return string
		 */
		public function select_plural_form( $count ) {
			return $this->gettext_select_plural_form( $count );
		}

		/**
		 * @return int
		 */
		public function get_plural_forms_count() {
			return $this->_nplurals;
		}
	}
endif;
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