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Memory Efficient Serialization Library: Store and retrieve data types in binary files

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Version License PHP version Categories
flatbuffers 0.0.1Free To Use But R...5.4PHP 5, Data types
Description Author

This package can store and retrieve data types in binary files.

It can serialize values of different types into streams of binary data.

The package can also retrieve the data types previously serialized as binary data.

The serialized data is stored in buffer string variable.

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Details

PHP Memory Efficient Serialization Library

Build Status

FlatBuffers is a serialization library for games and other memory constrained apps.

FlatBuffers allows you to directly access serialized data without unpacking/parsing it first, while still having great forwards/backwards compatibility.

FlatBuffers can be built for many different systems (Android, Windows, OS X, Linux)

For testing only

Composer

{
    "repositories": [
        {
            "url": "https://github.com/arzzen/php-flatbuffers.git",
            "type": "git"
        }
    ],
    "require": {
        "arzzen/php-flatbuffers": "dev-master"
    }
}

Test:

use FlatBuffers\Table;
use FlatBuffers\FlatBufferBuilder;
use FlatBuffers\ByteBuffer;
use FlatBuffers\Constants;

class StringWrapper extends Table implements Constants
{
	
	private $fbb;
	
	public function __construct(FlatBufferBuilder $flatBufferBuilder)
	{
		$this->fbb = $flatBufferBuilder;
	}
	
	public function init(ByteBuffer $byteBuffer)
	{
		$this->bb = $byteBuffer;
		$this->bb_pos = $this->bb->getInt($this->bb->getPosition()) + $this->bb->getPosition();
		
		return $this;
	}
	
	public function getString($slot = 0)
	{
		$vtable_offset = self::SIZEOF_INT + ($slot * 2); 
		
		$vtable = $this->bb_pos - $this->bb->getInt($this->bb_pos);
		
		$offset = $vtable_offset < $this->bb->getShort($vtable) ? $this->bb->getShort($vtable + $vtable_offset) : 0;
		
		$offset += $this->bb_pos + $this->bb->getInt($offset + $this->bb_pos);
		$len = $this->bb->getInt($offset);
		$startPos = $offset + self::SIZEOF_INT;
		$_string = substr($this->bb->_buffer, $startPos, $len);

		return ($offset != 0 ? $_string : null);
	}
	
	public function createString($value)
	{
		return $this->fbb->createString($value);
	}
	
	public function addString($slot, $str)
	{
		$this->fbb->addOffsetX($slot, $str, 0);
	}

	public function dataBuffer()
	{
		return $this->fbb->dataBuffer();
	}
	
	public function startObject($numfields)
	{
		$this->fbb->startObject($numfields);
	}
	
	public function endObject()
	{
		return $this->fbb->endObject();
	}
	
	public function finish($root_table, $identifier = NULL)
	{
		$this->fbb->finish($root_table, $identifier);
	}
	
}


$flatBufferBuilder = new FlatBufferBuilder(1);
$stringWrapper = new StringWrapper($flatBufferBuilder);

// set string
$firstText = $stringWrapper->createString('first_value');
$secondText = $stringWrapper->createString('second_value');

$stringWrapper->startObject(25);
$stringWrapper->addString(2, $firstText);
$stringWrapper->addString(3, $secondText);
$stringWrapper->finish($stringWrapper->endObject());

// get string
$stringWrapper->init($stringWrapper->dataBuffer());

echo $stringWrapper->getString(2);
echo $stringWrapper->getString(3);

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Files folder imagesrc (5 files)
Files folder imagetests (1 file)
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  Files folder image Files  /  src  
File Role Description
  Plain text file ByteBuffer.php Class Class source
  Plain text file Constants.php Class Class source
  Plain text file FlatBufferBuilder.php Class Class source
  Plain text file Struct.php Class Class source
  Plain text file Table.php Class Class source

  Files folder image Files  /  tests  
File Role Description
  Accessible without login Plain text file FlatBuffersTest.php Test Unit test script

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