angelovcom.net

mo.php (9379B)

---

 <?php
 /**
  * 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 {
 
 		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.
 		 */
 		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
 		 */
 		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
 		 */
 		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
 		 */
 		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
 		 */
 		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_lenghts_addr    = 28;
 			$translations_lenghts_addr = $originals_lenghts_addr + 8 * $total;
 			$size_of_hash              = 0;
 			$hash_addr                 = $translations_lenghts_addr + 8 * $total;
 			$current_addr              = $hash_addr;
 			fwrite(
 				$fh,
 				pack(
 					'V*',
 					$magic,
 					$revision,
 					$total,
 					$originals_lenghts_addr,
 					$translations_lenghts_addr,
 					$size_of_hash,
 					$hash_addr
 				)
 			);
 			fseek( $fh, $originals_lenghts_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
 		 */
 		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
 		 */
 		function export_translations( $entry ) {
 			// TODO: Warnings for control characters.
 			return $entry->is_plural ? implode( "\0", $entry->translations ) : $entry->translations[0];
 		}
 
 		/**
 		 * @return string
 		 */
 		function export_headers() {
 			$exported = '';
 			foreach ( $this->headers as $header => $value ) {
 				$exported .= "$header: $value\n";
 			}
 			return $exported;
 		}
 
 		/**
 		 * @param int $magic
 		 * @return string|false
 		 */
 		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.
 		 */
 		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_lenghts_addr/{$endian}translations_lenghts_addr/{$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_lenghts_addr'] );
 
 			// Read originals' indices.
 			$originals_lengths_length = $header['translations_lenghts_addr'] - $header['originals_lenghts_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_lenghts_length = $header['hash_addr'] - $header['translations_lenghts_addr'];
 			if ( $translations_lenghts_length != $header['total'] * 8 ) {
 				return false;
 			}
 
 			$translations = $reader->read( $translations_lenghts_length );
 			if ( $reader->strlen( $translations ) != $translations_lenghts_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.
 		 */
 		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
 		 */
 		function select_plural_form( $count ) {
 			return $this->gettext_select_plural_form( $count );
 		}
 
 		/**
 		 * @return int
 		 */
 		function get_plural_forms_count() {
 			return $this->_nplurals;
 		}
 	}
 endif;