<?php

// ---------------------------------------------------------
// -- A script to convert LIRC remote codes into the 
// -- format used by the Ken Sheriff Arduino IR Library 
// -- http://www.arcfn.com/2010/12/64-bit-rc6-codes-arduino-and-xbox.html
// ------ Usage --------------------------------------------
// -- Run with:
// -- php -q hexconvert.php 0x37FF07bff
// -- or
// -- php -q hexconvert.php 37FF07bff
// --
// -- It's case insensitive (but always returns lowercase)
// ---------------------------------------------------------

//print_r($argv);

// Is this the input I want? If it is, great, otherwise, end.
if (preg_match("/^[xa-f0-9]+$/i",$argv[1])) {

	// Clean up info, accept both 0x format, and hex without 0x.
	$input = $argv[1];
	$input = preg_replace("/^(0x)?(.+)$/","$2",$input);
	$input = strtolower($input);

	// echo "input: ".$input."\n";

} else {

	echo "did not detect a hexidecimal number in your input\n";
	echo "run like: php -q hexconvert.php 0x0b2FF4 etc\n";
	die("\n");

}

	// Renaming the input, lame.
	$hex = $input;
	// A string of hex digits to reference.
	$hexstr = "0123456789abcdef";

	// The variable where we'll store the result.
	$keep = "";
	
	// Cycle through all the hex characters in the string.
	for ($i=0; $i<strlen($hex); $i++) {
		// Get the hex character in question.
		$c = substr($hex,$i,1);
		
		// What's it's decimal value? We get this from the reference string.
		$pos = strpos($hexstr,$c);
		
		// We invert it's position (that's the whole point of this script)
		$inv = 15 - $pos;
		
		// And then we string that onto our "keeper" string.
		// echo $c." --> ".$pos." --> ".$inv."\n";
		$keep .= substr($hexstr,$inv,1);
	}

	// And give some output.
	echo "0x".$keep." [Converted to IR Library format]\n";
	echo "0x".$hex." [From your input (from LIRC)]\n";

	echo "\n";


	// Some testing hex values from my MCE remote.
	// x37FF07bff
	/*
	        Blue          0x00007ba1
	        Yellow        0x00007ba2
	        Green         0x00007ba3
	        Red           0x00007ba4
	
	*/
	//	$code = 0x37FF07bff; // key ZERO
	//	$code = 0x37FF07bed;
	//	$code = 0x37FF06BFF; // Key 0
	//	$code = 0x37FF08BF3; // Xbox On/Off

?>