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93 lines
2.5 KiB
PHP
93 lines
2.5 KiB
PHP
<?php
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namespace danog\PHP;
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/**
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* PHPStruct
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* PHP implementation of Python's struct module.
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* This library was created to help me develop a [client for the mtproto protocol](https://github.com/danog/MadelineProto).
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* The functions and the formats are exactly the ones used in python's struct (https://docs.python.org/3/library/struct.html)
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* For now custom byte size may not work properly on certain machines for the i, I, f and d formats.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @license MIT license
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*/
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// Struct class (for dynamic access)
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class StructClass
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{
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public $struct = null; // Will store an instance of the StructTools class
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public $format = null; // Will contain the format
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public $size = null; // Will contain the size
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/**
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* Constructor.
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*
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* Stores instance of the StructTools class and optional format/size
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*/
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public function __construct($format = null)
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{
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$this->struct = new \danog\PHP\StructTools();
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if ($format !== null) {
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$this->format = $format;
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$this->size = $this->struct->calcsize($format);
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}
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}
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/**
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* pack.
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*
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* Packs data into bytes
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*
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* @param $data Parameters to encode (may contain format string)
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*
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* @return Encoded data
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*/
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public function pack($data)
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{
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if ($this->format === null) {
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$format = array_shift($data);
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} else {
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$format = $this->format;
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}
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return $this->struct->pack($format, $data);
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}
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/**
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* unpack.
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*
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* Unpacks data into an array
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*
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* @param $format_maybe_data Format string (may be data if class is istantiated with format string)
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* @param $data Data to decode
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*
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* @return Decoded data
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*/
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public function unpack($format_maybe_data, $data = null)
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{
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if ($this->format === null) {
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$format = $format_maybe_data;
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} else {
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$format = $this->format;
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$data = $format_maybe_data;
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}
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return $this->struct->unpack($format, $data);
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}
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/**
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* calcsize.
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*
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* Return the size of the struct (and hence of the string) corresponding to the given format.
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*
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*
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* @param $format Format string
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*
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* @return int with size of the struct.
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*/
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public function calcsize($format = null)
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{
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return ($this->format !== null && $this->size !== null) ? $this->size : $this->struct->calcsize($format);
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}
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}
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