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CGettextMoFile

Package	system.i18n.gettext
Inheritance	class CGettextMoFile » CGettextFile » CComponent
Since	1.0
Version	$Id$
Source Code	framework/i18n/gettext/CGettextMoFile.php

CGettextMoFile represents an MO Gettext message file.

This class is written by adapting Michael's Gettext_MO class in PEAR. Please refer to the following license terms.

Copyright (c) 2004-2005, Michael Wallner . All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Public Properties

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Property	Type	Description	Defined By
useBigEndian	boolean	whether to use Big Endian when reading and writing an integer.	CGettextMoFile

Public Methods

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Method	Description	Defined By
__call()	Calls the named method which is not a class method.	CComponent
__construct()	Constructor.	CGettextMoFile
__get()	Returns a property value, an event handler list or a behavior based on its name.	CComponent
__isset()	Checks if a property value is null.	CComponent
__set()	Sets value of a component property.	CComponent
__unset()	Sets a component property to be null.	CComponent
asa()	Returns the named behavior object.	CComponent
attachBehavior()	Attaches a behavior to this component.	CComponent
attachBehaviors()	Attaches a list of behaviors to the component.	CComponent
attachEventHandler()	Attaches an event handler to an event.	CComponent
canGetProperty()	Determines whether a property can be read.	CComponent
canSetProperty()	Determines whether a property can be set.	CComponent
detachBehavior()	Detaches a behavior from the component.	CComponent
detachBehaviors()	Detaches all behaviors from the component.	CComponent
detachEventHandler()	Detaches an existing event handler.	CComponent
disableBehavior()	Disables an attached behavior.	CComponent
disableBehaviors()	Disables all behaviors attached to this component.	CComponent
enableBehavior()	Enables an attached behavior.	CComponent
enableBehaviors()	Enables all behaviors attached to this component.	CComponent
getEventHandlers()	Returns the list of attached event handlers for an event.	CComponent
hasEvent()	Determines whether an event is defined.	CComponent
hasEventHandler()	Checks whether the named event has attached handlers.	CComponent
hasProperty()	Determines whether a property is defined.	CComponent
load()	Loads messages from an MO file.	CGettextMoFile
raiseEvent()	Raises an event.	CComponent
save()	Saves messages to an MO file.	CGettextMoFile

Protected Methods

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Method	Description	Defined By
readByte()	Reads one or several bytes.	CGettextMoFile
readInteger()	Reads a 4-byte integer.	CGettextMoFile
readString()	Reads a string.	CGettextMoFile
writeByte()	Writes bytes.	CGettextMoFile
writeInteger()	Writes a 4-byte integer.	CGettextMoFile
writeString()	Writes a string.	CGettextMoFile

Property Details

useBigEndian property

public boolean $useBigEndian;

whether to use Big Endian when reading and writing an integer.

Method Details

__construct() method

public void __construct(boolean $useBigEndian=false)
$useBigEndian	boolean	whether to use Big Endian when reading and writing an integer.

Source Code: framework/i18n/gettext/CGettextMoFile.php#56 (show)


public function __construct($useBigEndian=false)
{
    $this->useBigEndian=$useBigEndian;
}

Constructor.

load() method

public array load(string $file, string $context)
$file	string	file path
$context	string	message context
{return}	array	message translations (source message => translated message)

Source Code: framework/i18n/gettext/CGettextMoFile.php#67 (show)


public function load($file,$context)
{
    if(!($fr=@fopen($file,'rb')))
        throw new CException(Yii::t('yii','Unable to read file "{file}".',
            array('{file}'=>$file)));

    if(!@flock($fr,LOCK_SH))
        throw new CException(Yii::t('yii','Unable to lock file "{file}" for reading.',
            array('{file}'=>$file)));

    $magic=current($array=unpack('c',$this->readByte($fr,4)));
    if($magic==-34)
        $this->useBigEndian=false;
    else if($magic==-107)
        $this->useBigEndian=true;
    else
        throw new CException(Yii::t('yii','Invalid MO file: {file} (magic: {magic}).',
            array('{file}'=>$file,'{magic}'=>$magic)));

    if(($revision=$this->readInteger($fr))!=0)
        throw new CException(Yii::t('yii','Invalid MO file revision: {revision}.',
            array('{revision}'=>$revision)));

    $count=$this->readInteger($fr);
    $sourceOffset=$this->readInteger($fr);
    $targetOffset=$this->readInteger($fr);

    $sourceLengths=array();
    $sourceOffsets=array();
    fseek($fr,$sourceOffset);
    for($i=0;$i<$count;++$i)
    {
        $sourceLengths[]=$this->readInteger($fr);
        $sourceOffsets[]=$this->readInteger($fr);
    }

    $targetLengths=array();
    $targetOffsets=array();
    fseek($fr,$targetOffset);
    for($i=0;$i<$count;++$i)
    {
        $targetLengths[]=$this->readInteger($fr);
        $targetOffsets[]=$this->readInteger($fr);
    }

    $messages=array();
    for($i=0;$i<$count;++$i)
    {
        $id=$this->readString($fr,$sourceLengths[$i],$sourceOffsets[$i]);
        if(($pos=strpos($id,chr(4)))!==false && substr($id,0,$pos)===$context)
        {
            $id=substr($id,$pos+1);
            $message=$this->readString($fr,$targetLengths[$i],$targetOffsets[$i]);
            $messages[$id]=$message;
        }
    }

    @flock($fr,LOCK_UN);
    @fclose($fr);

    return $messages;
}

Loads messages from an MO file.

readByte() method

protected string readByte(resource $fr, integer $n=1)
$fr	resource	file handle
$n	integer	number of bytes to read
{return}	string	bytes

Source Code: framework/i18n/gettext/CGettextMoFile.php#206 (show)


protected function readByte($fr,$n=1)
{
    if($n>0)
        return fread($fr,$n);
}

Reads one or several bytes.

readInteger() method

protected integer readInteger(resource $fr)
$fr	resource	file handle
{return}	integer	the result

Source Code: framework/i18n/gettext/CGettextMoFile.php#229 (show)


protected function readInteger($fr)
{
    return current($array=unpack($this->useBigEndian ? 'N' : 'V', $this->readByte($fr,4)));
}

Reads a 4-byte integer.


public function save($file,$messages)
{
    if(!($fw=@fopen($file,'wb')))
        throw new CException(Yii::t('yii','Unable to write file "{file}".',
            array('{file}'=>$file)));

    if(!@flock($fw,LOCK_EX))
        throw new CException(Yii::t('yii','Unable to lock file "{file}" for writing.',
            array('{file}'=>$file)));

    // magic
    if($this->useBigEndian)
        $this->writeByte($fw,pack('c*', 0x95, 0x04, 0x12, 0xde));
    else
        $this->writeByte($fw,pack('c*', 0xde, 0x12, 0x04, 0x95));

    // revision
    $this->writeInteger($fw,0);

    // message count
    $n=count($messages);
    $this->writeInteger($fw,$n);

    // offset of source message table
    $offset=28;
    $this->writeInteger($fw,$offset);
    $offset+=($n*8);
    $this->writeInteger($fw,$offset);
    // hashtable size, omitted
    $this->writeInteger($fw,0);
    $offset+=($n*8);
    $this->writeInteger($fw,$offset);

    // length and offsets for source messagess
    foreach(array_keys($messages) as $id)
    {
        $len=strlen($id);
        $this->writeInteger($fw,$len);
        $this->writeInteger($fw,$offset);
        $offset+=$len+1;
    }

    // length and offsets for target messagess
    foreach($messages as $message)
    {
        $len=strlen($message);
        $this->writeInteger($fw,$len);
        $this->writeInteger($fw,$offset);
        $offset+=$len+1;
    }

    // source messages
    foreach(array_keys($messages) as $id)
        $this->writeString($fw,$id);

    // target messages
    foreach($messages as $message)
        $this->writeString($fw,$message);

    @flock($fw,LOCK_UN);
    @fclose($fw);
}

Saves messages to an MO file.

writeByte() method

protected integer writeByte(resource $fw, string $data)
$fw	resource	file handle
$data	string	the data
{return}	integer	how many bytes are written

Source Code: framework/i18n/gettext/CGettextMoFile.php#218 (show)


protected function writeByte($fw,$data)
{
    return fwrite($fw,$data);
}

Writes bytes.

writeInteger() method

protected integer writeInteger(resource $fw, integer $data)
$fw	resource	file handle
$data	integer	the data
{return}	integer	how many bytes are written

Source Code: framework/i18n/gettext/CGettextMoFile.php#240 (show)


protected function writeInteger($fw,$data)
{
    return $this->writeByte($fw,pack($this->useBigEndian ? 'N' : 'V', (int)$data));
}

Writes a 4-byte integer.

writeString() method

protected integer writeString(resource $fw, string $data)
$fw	resource	file handle
$data	string	the string
{return}	integer	how many bytes are written

Source Code: framework/i18n/gettext/CGettextMoFile.php#265 (show)


protected function writeString($fw,$data)
{
    return $this->writeByte($fw,$data."\0");
}

Writes a string.

protected string readString(resource $fr, integer $length, integer $offset=NULL)
$fr	resource	file handle
$length	integer	string length
$offset	integer	offset of the string in the file. If null, it reads from the current position.
{return}	string	the result

public void save(string $file, array $messages)
$file	string	file path
$messages	array	message translations (message id => translated message). Note if the message has a context, the message id must be prefixed with the context with chr(4) as the separator.