Added initial files from google code's jQuery.sheet repo, where it incubated

Author: robertleeplummerjr

calc.php

@@ -0,0 +1,34 @@
+<?php
+
+ini_set('error_reporting', E_ALL);
+ini_set('display_errors', 1);
+
+include_once '../parser/formula/formula.php';
+include_once 'handler.php';
+include_once 'formulas.php';
+
+if (empty($_REQUEST['ss'])) {
+	echo "Spreadsheet needed";
+	exit();
+}
+
+$spreadsheets = json_decode($_REQUEST['ss']);
+
+$formulas = new formulas();
+
+$handler = ParserHandler::initSimpleJson($spreadsheets, $formulas);
+$handler->calc();
+
+if (isset($_REQUEST['c'])) {
+	$cell = $_REQUEST['c'];
+	$sheet = (isset($_REQUEST['s']) ? $_REQUEST['s'] : 0);
+	$handler->setSheet($sheet);
+	echo json_encode($handler->cellValue($cell));
+} else if (isset($_REQUEST['cr'])) {
+	$cells = explode(':', $_REQUEST['cr']);
+	$sheet = (isset($_REQUEST['s']) ? $_REQUEST['s'] : 0);
+	$handler->setSheet($sheet);
+	echo json_encode($handler->cellRangeValue($cells[0], $cells[1]));
+} else {
+	echo json_encode($handler->toArray(isset($_REQUEST['s']) ? $_REQUEST['s'] : null));
+}

formulas.php

@@ -0,0 +1,150 @@
+<?php
+class formulas
+{
+	public $inputs;
+	public $outputs;
+
+	function sum($cell, $array)
+	{
+		return array_sum($array);
+	}
+
+	function divide($cell, $array)
+	{
+		return array_sum($array);
+	}
+
+	function average($cell, $array)
+	{
+		$total = 0;
+		$count = count($array);
+		foreach ($array as $value) {
+			$total = $total + $value;
+		}
+		$average = ($total / $count);
+		return $average;
+	}
+
+	function avg($cell, $array)
+	{
+		return $this->average($cell, $array);
+	}
+
+	function count($cell, $array)
+	{
+		$count = 0;
+
+		foreach ($array as $value) {
+			if ($value != null) $count++;
+		}
+
+		return $count;
+	}
+
+	function counta($cell, $array)
+	{
+		$count = 0;
+
+		foreach ($array as $value) {
+			if (!empty($value)) $count++;
+		}
+
+		return $count;
+	}
+
+	function max($cell, $array)
+	{
+		return max($array);
+	}
+
+	function min($cell, $array)
+	{
+		return min($array);
+	}
+
+	function mean($cell, $array)
+	{
+		sort($array);
+		$count = count($array); //total numbers in array
+		$middleval = floor(($count-1)/2); // find the middle value, or the lowest middle value
+		if($count % 2) { // odd number, middle is the median
+			$median = $array[$middleval];
+		} else { // even number, calculate avg of 2 medians
+			$low = $array[$middleval];
+			$high = $array[$middleval+1];
+			$median = (($low+$high)/2);
+		}
+		return $median;
+	}
+
+	function abs($cell, $array)
+	{
+		return abs($array);
+	}
+
+	function ceiling($cell, $array)
+	{
+		return ceil($array);
+	}
+
+	function floor($cell, $array)
+	{
+		return floor($array);
+	}
+
+	function int($cell, $array)
+	{
+		return floor($array);
+	}
+
+	function round($cell, $array)
+	{
+		return round($array);
+	}
+
+	function rand($cell, $array)
+	{
+		return rand();
+	}
+
+	function rnd($cell, $array)
+	{
+		return $this->rand($cell, $array);
+	}
+
+	function true($cell, $array)
+	{
+		return 'TRUE';
+	}
+
+	function false($cell, $array)
+	{
+		return 'FALSE';
+	}
+
+	function pi($cell, $array)
+	{
+		return pi();
+	}
+
+	function power($cell, $array)
+	{
+		return pow($array[0], $array[1]);
+	}
+
+	function sqrt($cell, $array)
+	{
+		return sqrt($array);
+	}
+
+	function input($cell, $array)
+	{
+		return (!empty($this->inputs[$array[0]]) ? $this->inputs[$array[0]] : 0);
+	}
+
+	function output($cell, $array)
+	{
+		$this->outputs[$array[0]] = (!empty($array[1]) ? $array[1] : 0);
+		return '';
+	}
+}