function _stringToArray () {
$temp_operator = null;
$temp_value = null;
$this->_input = str_replace(" ","",$this->_input);
for($i = 0; $i < strlen($this->_input); $i++) {
if ($this->_input[$i] == ' ') {
if ($temp_operator != null) {
array_push($this->_input_array, $temp_operator);
$temp_operator = null;
}
if ($temp_value != null) {
array_push($this->_input_array, $temp_value);
$temp_value = null;
}
} elseif (($temp_value == null) && $temp_operator != ')' &&
(!array_key_exists($temp_operator,$this->_operation) ||
!array_key_exists(2,$this->_operation[$temp_operator]) ||
$this->_operation[$temp_operator][2]>0) && ($this->_input[$i] == '-')) {
if ($temp_operator != null) {
array_push($this->_input_array, $temp_operator);
$temp_operator = null;
}
array_push($this->_input_array, '-1');
array_push($this->_input_array, '*');
//} elseif ((is_numeric($this->_input[$i])) || ($this->_input[$i] == '.')) elseif ((is_numeric($this->_input[$i])) || ($this->_input[$i] == '.') ||
($this->_input[$i] == 'F')) {
if ($temp_operator != null) {
array_push($this->_input_array, $temp_operator);
$temp_operator = null;
}
$temp_value .= $this->_input[$i];
} else {
if ($this->_keyExists($temp_operator, $this->_operation, 1)) {
array_push($this->_input_array, $temp_operator);
$temp_operator = null;
}
if ($temp_value != null) {
array_push($this->_input_array, $temp_value);
$temp_value = null;
}
$temp_operator .= $this->_input[$i];
}
}
if ($temp_operator != null && $temp_operator != ' ') {
array_push($this->_input_array, $temp_operator);
} elseif($temp_value != null && $temp_value != ' ') {
array_push($this->_input_array, $temp_value);
}
// $this->_testInput();
print_r($this->_expression_value);
print_r($this->_input_array);
return $this->_input_array;
}
function _arrayToRpn() {
if ($this->_error <> null) {
$this->_output = array();
return $this->_output;
}
for($i = 0; $i < count($this->_input_array); $i++) {
$temp = $this->_input_array[$i];
if (is_numeric($temp)) {
$this->_outputAdd($temp);
} else if($this->_keyExists($temp, $this->_expression_value, 0)) {
$this->_outputAdd($this->_expression_value[$temp]);
} else {
if ($temp == ')') {
while(!$this->_stackEmpty() && ($this->_stackPriority() >= 1))
if (!$this->_stackEmpty())
} elseif ($temp=='(') {
$this->_stackAdd($temp);
} elseif (($this->_stackEmpty()) || (($this->_priority($temp) >
$this->_stackPriority()))) {
$this-> _stackAdd($temp);
} else {
while(!$this->_stackEmpty() && ($this->_priority($temp)
<= $this->_stackPriority()))
$this->_stackAdd($temp);
}
}
}
while(!$this->_stackEmpty())
return $this->_output;
}
function _rpnToValue() {
$time1 = $this->_getMicroTime();
if ($this->_error <> null) {
$this->_value = null;
return $this->_value;
}
$this->_value = 0;
$temp = $this->_output;
do {
$pos = $this->_nextOperator($temp);
if ($pos == -1) {
$this->_error = $this->_raiseError('Syntax error');
$this->_value = null;
return $this->_value;
}
$operator = $this->_operation[$temp[$pos]];
$arg = $operator[2];
$function = $operator[3];
if (($arg==2) && (!isset($temp[$pos-1]) || !is_numeric($temp[$pos-1]) ||
!isset($temp[$pos-2]) || !is_numeric($temp[$pos-2]))) {
$this->_error = $this->_raiseError('Syntax error');
$this->_value = null;
return $this->_value;
} elseif (($arg==1) && (!isset($temp[$pos-1]) || !is_numeric($temp[$pos-1]))) {
$this->_error = $this->_raiseError('Syntax error');
$this->_value = null;
return $this->_value;
}
if(is_array($function)) {
if($arg==2) $arg_array = array($temp[$pos-2],$temp[$pos-1]);
elseif($arg==1) $arg_array = array($temp[$pos-1]);
else $arg_array = array();
if($function['type'] == 'userFunction') {
$this->_value = call_user_func_array($function['function'], $arg_array);
} else {
$function_array = array(&$function['class'], $function['method']);
$this->_value = call_user_func_array($function_array, $arg_array);
}
} else {
$this->_value = $this->$function($temp, $pos);
}
if ($this->_isNan($this->_value)) {
$this->_error = $this->_raiseError('NAN value');
$this->_value = null;
return $this->_value;
} elseif ($this->_isInfinite($this->_value)) {
$this->_error = $this->_raiseError('Infinite value');
$this->_value = null;
return $this->_value;
} elseif (is_null($this->_value)) {
return $this->_value;
}
$temp = $this->_refresh($temp, $pos, $arg, $this->_value);
} while(count($temp) > 1);
$this->_value = $temp[0];
$time2 = $this->_getMicroTime();
$this->_timer = $time2 - $time1;
return $this->_value;
}
