<?php
/****************************************************************
 * tools.func.php v1.0.0  
 *                            by Fumi.Iseki (c) 2010 5/13
 *
 *                            http://www.nsl.tuis.ac.jp/
 *
 ****************************************************************/


/****************************************************************
 * Function List

 function  isNumeric($str, $nullok=false)
 function  isAlphabetNumeric($str, $nullok=false)
 function  isAlphabetNumericSpecial($str, $nullok=false)
 function  isGUID($uuid, $nullok=false)
 
 function  split_key_value($str)

 function  make_random_hash()
 function  make_random_guid()
 
 function  j2k_to_tga($file, $iscopy=true)
 function  get_j2k_to_tga_command()             // need j2k_to_image (OpenJpeg)
 function  get_image_size_convert_command($xsize, $ysize)

 function  find_command_path($command)

 ****************************************************************/


function  isNumeric($str, $nullok=false)
{
    if ($str!='0' and $str==null) return $nullok;
    if (!preg_match('/^[0-9\.]+$/', $str)) return false;

    return true;
}


function  isAlphabetNumeric($str, $nullok=false)
{
    if ($str!='0' and $str==null) return $nullok;
    if (!preg_match('/^\w+$/', $str)) return false;
    return true;
}


function  isAlphabetNumericSpecial($str, $nullok=false)
{
    if ($str!='0' and $str==null) return $nullok;
    //if (!preg_match('/^[_a-zA-Z0-9 &@%#\-\.]+$/', $str)) return false;
    if (!preg_match('/^[_a-zA-Z0-9 !&@%#\-\.\$]+$/', $str)) return false;
    return true;
}


function  isGUID($uuid, $nullok=false)
{
    if ($uuid==null) return $nullok;
    if (!preg_match('/^[0-9A-Fa-f]{8,8}-[0-9A-Fa-f]{4,4}-[0-9A-Fa-f]{4,4}-[0-9A-Fa-f]{4,4}-[0-9A-Fa-f]{12,12}$/', $uuid)) return false;
    return true;
}


function  make_random_hash()
{
     $ret = sprintf('%04x%04x%04x%04x%04x%04x%04x%04x',mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff),
                                                       mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff),mt_rand(0,0xffff));
    return $ret;
}


function  make_random_guid()
{
    $uuid = sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
                      mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
                      mt_rand( 0, 0x0fff ) | 0x4000,
                      mt_rand( 0, 0x3fff ) | 0x8000,   
                      mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ) );
    return $uuid;
}
 

///////////////////////////////////////////////////////////////////////////////////////////////////
//
// String Tools
//

// parse {"key1":"value1","key2":{"key3":"value3"}}
//
//        --> [key1] => value1
//            [key2] => Array
//                (
//                    [key3] => value3
//                )
//

function  split_key_value($str)
{
    $info = array();
    $str  = trim($str);

    if (substr($str, 0, 1)=='{' and substr($str, -1)=='}') {
        $str = substr($str, 1, -1);
        $inbrkt = 0;
        $inquot = false;
        $inkkko = false;
        $isakey = true;
        $key    = "";
        $val    = "";

        for ($i=0; $i<strlen($str); $i++) {
            $cc = substr($str, $i, 1);

            if ($inbrkt==0 and !$inquot and ($cc=='"' or $cc=='\'')) {
                $inquot = true;
            }
            else if ($inbrkt==0 and $inquot and ($cc=='"' or $cc=='\'')) {
                $inquot = false;
            }
            else if ($inbrkt==0 and $isakey  and !$inquot and !$inkkko and $cc==':') {
                $isakey = false;
            }        
            else if ($inbrkt==0 and !$isakey and !$inquot and !$inkkko and $cc==',') {
                if (substr($val, 0, 1)=='{' and substr($val, -1)=='}') {
                    $info[$key] = split_key_value($val);
                }
                else $info[$key] = $val;

                $isakey = true;
                $key    = "";
                $val    = "";
            }
            else {
                if      ($cc=='{') $inbrkt++;
                else if ($cc=='}') $inbrkt--;
                else {
                    if      ($inbrkt==0 and !$inkkko and $cc=='[') $inkkko = true;
                    else if ($inbrkt==0 and $inkkko  and $cc==']') $inkkko = false;
                }

                if ($isakey) $key .= $cc;    
                else         $val .= $cc;
            }
        }

        //
        if ($key!="") {
            if (substr($val, 0, 1)=='{' and substr($val, -1)=='}') {
                $info[$key] = split_key_value($val);
            }
            else $info[$key] = $val;
        }
    }

    return $info;
}


///////////////////////////////////////////////////////////////////////////////////////////////////
//
// Image
//

//
// Convert Image from JPEG2000 to TGA
//        file -> file.tga
// 
function  j2k_to_tga($file, $iscopy=true)
{
    if (!file_exists($file)) return false;

    $com_totga = get_j2k_to_tga_command();
    if ($com_totga=='') return false;

    if ($iscopy) $ret = copy  ($file, $file.'.j2k');
    else          $ret = rename($file, $file.'.j2k');
    if (!$ret) return false;

    exec("$com_totga -i $file.j2k -o $file.tga 1>/dev/null 2>&1");
    unlink($file.'.j2k');

    return true;
}


function  get_j2k_to_tga_command()
{
    $command = find_command_path('j2k_to_image');
    return $command;
}


//
// Image Size Convert Command String
//
function  get_image_size_convert_command($xsize, $ysize)
{
    if (!isNumeric($xsize) or !isNumeric($ysize)) return '';

    $command = find_command_path('convert');
    if ($command=='') return '';

    $prog = $command.' - -geometry '.$xsize.'x'.$ysize.'! -';
    return $prog;
}


function  find_command_path($command)
{
    $path = '';
    if (file_exists('/usr/local/bin/'.$command))      $path = '/usr/local/bin/';
    else if (file_exists('/usr/bin/'.$command))       $path = '/usr/bin/';
    else if (file_exists('/usr/X11R6/bin/'.$command)) $path = '/usr/X11R6/bin/';
    else if (file_exists('/bin/'.$command))           $path = '/bin/';
    else return '';

    return $path.$command;
}