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<?php

/*=======================================================================

// File: 	JPGRAPH_UTILS.INC

// Description: Collection of non-essential "nice to have" utilities

// Created: 	2005-11-20

// Ver:		$Id: jpgraph_utils.inc.php 1089 2009-01-18 22:30:30Z ljp $

//

// Copyright (c) Aditus Consulting. All rights reserved.

//========================================================================

*/

//===================================================

// CLASS FuncGenerator

// Description: Utility class to help generate data for function plots.

// The class supports both parametric and regular functions.

//===================================================

class FuncGenerator {

    var $iFunc='',$iXFunc='',$iMin,$iMax,$iStepSize;

    function FuncGenerator($aFunc,$aXFunc='') {

	$this->iFunc = $aFunc;

	$this->iXFunc = $aXFunc;

    }

    function E($aXMin,$aXMax,$aSteps=50) {

	$this->iMin = $aXMin;

	$this->iMax = $aXMax;

	$this->iStepSize = ($aXMax-$aXMin)/$aSteps;

	if( $this->iXFunc != '' )

	    $t = 'for($i='.$aXMin.'; $i<='.$aXMax.'; $i += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]='.$this->iXFunc.';}';

	elseif( $this->iFunc != '' )

	    $t = 'for($x='.$aXMin.'; $x<='.$aXMax.'; $x += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]=$x;} $x='.$aXMax.';$ya[]='.$this->iFunc.';$xa[]=$x;';

	else

	    JpGraphError::RaiseL(24001);//('FuncGenerator : No function specified. ');

	@eval($t);

	// If there is an error in the function specifcation this is the only

	// way we can discover that.

	if( empty($xa) || empty($ya) )

	    JpGraphError::RaiseL(24002);//('FuncGenerator : Syntax error in function specification ');

	return array($xa,$ya);

    }

}

//=============================================================================

// CLASS SymChar

// Description: Code values for some commonly used characters that

//              normally isn't available directly on the keyboard, for example

//              mathematical and greek symbols.

//=============================================================================

class  SymChar {

    function Get($aSymb,$aCapital=FALSE) {

        static $iSymbols = array(

    /* Greek */

	array('alpha','03B1','0391'),

	array('beta','03B2','0392'),

	array('gamma','03B3','0393'),

	array('delta','03B4','0394'),

	array('epsilon','03B5','0395'),

	array('zeta','03B6','0396'),

	array('ny','03B7','0397'),

	array('eta','03B8','0398'),

	array('theta','03B8','0398'),

	array('iota','03B9','0399'),

	array('kappa','03BA','039A'),

	array('lambda','03BB','039B'),

	array('mu','03BC','039C'),

	array('nu','03BD','039D'),

	array('xi','03BE','039E'),

	array('omicron','03BF','039F'),

	array('pi','03C0','03A0'),

	array('rho','03C1','03A1'),

	array('sigma','03C3','03A3'),

	array('tau','03C4','03A4'),

	array('upsilon','03C5','03A5'),

	array('phi','03C6','03A6'),

	array('chi','03C7','03A7'),

	array('psi','03C8','03A8'),

	array('omega','03C9','03A9'),

    /* Money */

	array('euro','20AC'),

	array('yen','00A5'),

	array('pound','20A4'),

    /* Math */

	array('approx','2248'),

	array('neq','2260'),

	array('not','2310'),

	array('def','2261'),

	array('inf','221E'),

	array('sqrt','221A'),

	array('int','222B'),

    /* Misc */

	array('copy','00A9'),

	array('para','00A7'),

	array('tm','2122'),   /* Trademark symbol */

	array('rtm','00AE')   /* Registered trademark */

);

	$n = count($iSymbols);

	$i=0;

	$found = false;

	$aSymb = strtolower($aSymb);

	while( $i < $n && !$found ) {

	    $found = $aSymb === $iSymbols[$i++][0];

	}

	if( $found ) {

	    $ca = $iSymbols[--$i];

	    if( $aCapital && count($ca)==3 )

		$s = $ca[2];

	    else

		$s = $ca[1];

	    return sprintf('&#%04d;',hexdec($s));

	}

	else

	    return '';

    }

}

//=============================================================================

// CLASS DateScaleUtils

// Description: Help to create a manual date scale

//=============================================================================

DEFINE('DSUTILS_MONTH',1); // Major and minor ticks on a monthly basis

DEFINE('DSUTILS_MONTH1',1); // Major and minor ticks on a monthly basis

DEFINE('DSUTILS_MONTH2',2); // Major ticks on a bi-monthly basis

DEFINE('DSUTILS_MONTH3',3); // Major icks on a tri-monthly basis

DEFINE('DSUTILS_MONTH6',4); // Major on a six-monthly basis

DEFINE('DSUTILS_WEEK1',5); // Major ticks on a weekly basis

DEFINE('DSUTILS_WEEK2',6); // Major ticks on a bi-weekly basis

DEFINE('DSUTILS_WEEK4',7); // Major ticks on a quod-weekly basis

DEFINE('DSUTILS_DAY1',8); // Major ticks on a daily basis

DEFINE('DSUTILS_DAY2',9); // Major ticks on a bi-daily basis

DEFINE('DSUTILS_DAY4',10); // Major ticks on a qoud-daily basis

DEFINE('DSUTILS_YEAR1',11); // Major ticks on a yearly basis

DEFINE('DSUTILS_YEAR2',12); // Major ticks on a bi-yearly basis

DEFINE('DSUTILS_YEAR5',13); // Major ticks on a five-yearly basis

class DateScaleUtils {

    var $iMin=0, $iMax=0;

    var $starthour,$startmonth, $startday, $startyear;

    var $endmonth, $endyear, $endday;

    var $tickPositions=array(),$minTickPositions=array();

    var $iUseWeeks = true;

    function UseWeekFormat($aFlg) {

	$this->iUseWeeks = $aFlg;

    }

    function doYearly($aType,$aMinor=false) {

	$i=0; $j=0;

	$m = $this->startmonth;

	$y = $this->startyear;

	if( $this->startday == 1 ) {

	    $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);

	}

	++$m;

	switch( $aType ) {

	    case DSUTILS_YEAR1:

		for($y=$this->startyear; $y <= $this->endyear; ++$y ) {

		    if( $aMinor ) {

			while( $m <= 12 ) {

			    if( !($y == $this->endyear && $m > $this->endmonth) ) {

				$this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);

			    }

			    ++$m;

			}

			$m=1;

		    }

		    $this->tickPositions[$i++] = mktime(0,0,0,1,1,$y);

		}

		break;

	    case DSUTILS_YEAR2:

		$y=$this->startyear;

		while( $y <= $this->endyear ) {

		    $this->tickPositions[$i++] = mktime(0,0,0,1,1,$y);

		    for($k=0; $k < 1; ++$k ) {

			++$y;

			if( $aMinor ) {

			    $this->minTickPositions[$j++] = mktime(0,0,0,1,1,$y);

			}

		    }

		    ++$y;

		}

		break;

	    case DSUTILS_YEAR5:

		$y=$this->startyear;

		while( $y <= $this->endyear ) {

		    $this->tickPositions[$i++] = mktime(0,0,0,1,1,$y);

		    for($k=0; $k < 4; ++$k ) {

			++$y;

			if( $aMinor ) {

			    $this->minTickPositions[$j++] = mktime(0,0,0,1,1,$y);

			}

		    }

		    ++$y;

		}

		break;

	}

    }

    function doDaily($aType,$aMinor=false) {

	$m = $this->startmonth;

	$y = $this->startyear;

	$d = $this->startday;

	$h = $this->starthour;

	$i=0;$j=0;

	if( $h == 0 ) {

	    $this->tickPositions[$i++] = mktime(0,0,0,$m,$d,$y);

	}

	$t = mktime(0,0,0,$m,$d,$y);

	switch($aType) {

	    case DSUTILS_DAY1:

		while( $t <= self::$iMax ) {

		    $t = strtotime('+1 day',$t);

		    $this->tickPositions[$i++] = $t;

		    if( $aMinor ) {

			$this->minTickPositions[$j++] = strtotime('+12 hours',$t);

		    }

		}

		break;

	    case DSUTILS_DAY2:

		while( $t <= $this->iMax ) {

		    $t = strtotime('+1 day',$t);

		    if( $aMinor ) {

			$this->minTickPositions[$j++] = $t;

		    }

		    $t = strtotime('+1 day',$t);

		    $this->tickPositions[$i++] = $t;

		}

		break;

	    case DSUTILS_DAY4:

		while( $t <= $this->iMax ) {

		    for($k=0; $k < 3; ++$k ) {

			$t = strtotime('+1 day',$t);

			if( $aMinor ) {

			    $this->minTickPositions[$j++] = $t;

			}

		    }

		    $t = strtotime('+1 day',$t);

		    $this->tickPositions[$i++] = $t;

		}

		break;

	}

    }

    function doWeekly($aType,$aMinor=false) {

	$hpd = 3600*24;

	$hpw = 3600*24*7;

	// Find out week number of min date

	$thursday = $this->iMin + $hpd * (3 - (date('w', $this->iMin) + 6) % 7);

	$week = 1 + (date('z', $thursday) - (11 - date('w', mktime(0, 0, 0, 1, 1, date('Y', $thursday)))) % 7) / 7;

	$daynumber = date('w',$this->iMin);

	if( $daynumber == 0 ) $daynumber = 7;

	$m = $this->startmonth;

	$y = $this->startyear;

	$d = $this->startday;

	$i=0;$j=0;

	// The assumption is that the weeks start on Monday. If the first day

	// is later in the week then the first week tick has to be on the following

	// week.

	if( $daynumber == 1 ) {

	    $this->tickPositions[$i++] = mktime(0,0,0,$m,$d,$y);

	    $t = mktime(0,0,0,$m,$d,$y) + $hpw;

	}

	else {

	    $t = mktime(0,0,0,$m,$d,$y) + $hpd*(8-$daynumber);

	}

	switch($aType) {

	    case DSUTILS_WEEK1:

		$cnt=0;

		break;

	    case DSUTILS_WEEK2:

		$cnt=1;

		break;

	    case DSUTILS_WEEK4:

		$cnt=3;

		break;

	}

	while( $t <= $this->iMax ) {

	    $this->tickPositions[$i++] = $t;

	    for($k=0; $k < $cnt; ++$k ) {

		$t += $hpw;

		if( $aMinor ) {

		    $this->minTickPositions[$j++] = $t;

		}

	    }

	    $t += $hpw;

	}

    }

    function doMonthly($aType,$aMinor=false) {

	$monthcount=0;

	$m = $this->startmonth;

	$y = $this->startyear;

	$i=0; $j=0;

	// Skip the first month label if it is before the startdate

	if( $this->startday == 1 ) {

	    $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);

	    $monthcount=1;

	}

	if( $aType == 1 ) {

	    if( $this->startday < 15 ) {

		$this->minTickPositions[$j++] = mktime(0,0,0,$m,15,$y);

	    }

	}

	++$m;

	// Loop through all the years included in the scale

	for($y=$this->startyear; $y <= $this->endyear; ++$y ) {

	    // Loop through all the months. There are three cases to consider:

	    // 1. We are in the first year and must start with the startmonth

	    // 2. We are in the end year and we must stop at last month of the scale

	    // 3. A year in between where we run through all the 12 months

	    $stopmonth = $y == $this->endyear ? $this->endmonth : 12;

	    while( $m <= $stopmonth ) {

		switch( $aType ) {

		    case DSUTILS_MONTH1:

			// Set minor tick at the middle of the month

			if( $aMinor ) {

			    if( $m <= $stopmonth ) {

				if( !($y==$this->endyear && $m==$stopmonth && $this->endday < 15) )

				$this->minTickPositions[$j++] = mktime(0,0,0,$m,15,$y);

			    }

			}

			// Major at month

			// Get timestamp of first hour of first day in each month

			$this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);

			break;

		    case DSUTILS_MONTH2:

			if( $aMinor ) {

			    // Set minor tick at start of each month

			    $this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);

			}

			// Major at every second month

			// Get timestamp of first hour of first day in each month

			if( $monthcount % 2 == 0 ) {

			    $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);

			}

			break;

		    case DSUTILS_MONTH3:

			if( $aMinor ) {

			    // Set minor tick at start of each month

			    $this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);

			}

			    // Major at every third month

			// Get timestamp of first hour of first day in each month

			if( $monthcount % 3 == 0 ) {

			    $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);

			}

			break;

		    case DSUTILS_MONTH6:

			if( $aMinor ) {

			    // Set minor tick at start of each month

			    $this->minTickPositions[$j++] = mktime(0,0,0,$m,1,$y);

			}

			// Major at every third month

			// Get timestamp of first hour of first day in each month

			if( $monthcount % 6 == 0 ) {

			    $this->tickPositions[$i++] = mktime(0,0,0,$m,1,$y);

			}

			break;

		}

		++$m;

		++$monthcount;

	    }

	    $m=1;

	}

	// For the case where all dates are within the same month

	// we want to make sure we have at least two ticks on the scale

	// since the scale want work properly otherwise

	if($this->startmonth == $this->endmonth && $this->startyear == $this->endyear && $aType==1 ) {

	    $this->tickPositions[$i++] = mktime(0 ,0 ,0, $this->startmonth + 1, 1, $this->startyear);

	}

	return array($this->tickPositions,$this->minTickPositions);

    }

    function GetTicks($aData,$aType=1,$aMinor=false,$aEndPoints=false) {

	$n = count($aData);

	return $this->GetTicksFromMinMax($aData[0],$aData[$n-1],$aType,$aMinor,$aEndPoints);

    }

    function GetAutoTicks($aMin,$aMax,$aMaxTicks=10,$aMinor=false) {

	$diff = $aMax - $aMin;

	$spd = 3600*24;

	$spw = $spd*7;

	$spm = $spd*30;

	$spy = $spd*352;

	if( $this->iUseWeeks )

	    $w = 'W';

	else

	    $w = 'd M';

	// Decision table for suitable scales

	// First value: Main decision point

	// Second value: Array of formatting depending on divisor for wanted max number of ticks. <divisor><formatting><format-string>,..

	$tt = array(

	    array($spw, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',-1,DSUTILS_DAY4,'d M')),

	    array($spm, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',4,DSUTILS_DAY4,'d M',

			      7,DSUTILS_WEEK1,$w,-1,DSUTILS_WEEK2,$w)),

	    array($spy, array(1,DSUTILS_DAY1,'d M',2,DSUTILS_DAY2,'d M',4,DSUTILS_DAY4,'d M',

			      7,DSUTILS_WEEK1,$w,14,DSUTILS_WEEK2,$w,

			      30,DSUTILS_MONTH1,'M',60,DSUTILS_MONTH2,'M',-1,DSUTILS_MONTH3,'M')),

	    array(-1, array(30,DSUTILS_MONTH1,'M-Y',60,DSUTILS_MONTH2,'M-Y',90,DSUTILS_MONTH3,'M-Y',

			    180,DSUTILS_MONTH6,'M-Y',352,DSUTILS_YEAR1,'Y',704,DSUTILS_YEAR2,'Y',-1,DSUTILS_YEAR5,'Y')));

	$ntt = count($tt);

	$nd = floor($diff/$spd);

	for($i=0; $i < $ntt; ++$i ) {

	    if( $diff <= $tt[$i][0] || $i==$ntt-1) {

		$t = $tt[$i][1];

		$n = count($t)/3;

		for( $j=0; $j < $n; ++$j ) {

		    if( $nd/$t[3*$j] <= $aMaxTicks || $j==$n-1) {

			$type = $t[3*$j+1];

			$fs = $t[3*$j+2];

			list($tickPositions,$minTickPositions) = $this->GetTicksFromMinMax($aMin,$aMax,$type,$aMinor);

			return array($fs,$tickPositions,$minTickPositions,$type);

		    }

		}

	    }

	}

    }

    function GetTicksFromMinMax($aMin,$aMax,$aType,$aMinor=false,$aEndPoints=false) {

	$this->starthour = date('G',$aMin);

	$this->startmonth = date('n',$aMin);

	$this->startday = date('j',$aMin);

	$this->startyear = date('Y',$aMin);

	$this->endmonth = date('n',$aMax);

	$this->endyear = date('Y',$aMax);

	$this->endday = date('j',$aMax);

	$this->iMin = $aMin;

	$this->iMax = $aMax;

	if( $aType <= DSUTILS_MONTH6 ) {

	    $this->doMonthly($aType,$aMinor);

	}

	elseif( $aType <= DSUTILS_WEEK4 ) {

	    $this->doWeekly($aType,$aMinor);

	}

	elseif( $aType <= DSUTILS_DAY4 ) {

	    $this->doDaily($aType,$aMinor);

	}

	elseif( $aType <= DSUTILS_YEAR5 ) {

	    $this->doYearly($aType,$aMinor);

	}

	else {

	    JpGraphError::RaiseL(24003);

	}

	// put a label at the very left data pos

	if( $aEndPoints ) {

	    $tickPositions[$i++] = $aData[0];

	}

	// put a label at the very right data pos

	if( $aEndPoints ) {

	    $tickPositions[$i] = $aData[$n-1];

	}

	return array($this->tickPositions,$this->minTickPositions);

    }

}

//=============================================================================

// Class ReadFileData

//=============================================================================

Class ReadFileData {

    //----------------------------------------------------------------------------

    // Desciption:

    // Read numeric data from a file.

    // Each value should be separated by either a new line or by a specified

    // separator character (default is ',').

    // Before returning the data each value is converted to a proper float

    // value. The routine is robust in the sense that non numeric data in the

    // file will be discarded.

    //

    // Returns:

    // The number of data values read on success, FALSE on failure

    //----------------------------------------------------------------------------

    function FromCSV($aFile,&$aData,$aSepChar=',',$aMaxLineLength=1024) {

	$rh = fopen($aFile,'r');

	if( $rh === false )

	    return false;

	$tmp = array();

	$lineofdata = fgetcsv($rh, 1000, ',');

	while ( $lineofdata !== FALSE) {

	    $tmp = array_merge($tmp,$lineofdata);

	    $lineofdata = fgetcsv($rh, $aMaxLineLength, $aSepChar);

	}

	fclose($rh);

	// Now make sure that all data is numeric. By default

	// all data is read as strings

	$n = count($tmp);

	$aData = array();

	$cnt=0;

	for($i=0; $i < $n; ++$i) {

	    if( $tmp[$i] !== "" ) {

		$aData[$cnt++] = floatval($tmp[$i]);

	    }

	}

	return $cnt;

    }

}

?>