/**
* This method calculates the NPath Complexity of a while-statement, the
* meassured value is then returned as a string.
*
* <code>
* while (<expr>)
* <while-range>
* S;
*
* -- NP(while) = NP(<while-range>) + NP(<expr>) + 1 --
* </code>
*
* @param PHP_Depend_Code_ASTNodeI $node The currently visited node.
* @param string $data The previously calculated npath value.
*
* @return string
* @since 0.9.12
*/
public function visitWhileStatement($node, $data)
{
$expr = $this->sumComplexity($node->getChild(0));
$stmt = $node->getChild(1)->accept($this, 1);
$npath = PHP_Depend_Util_MathUtil::add($expr, $stmt);
$npath = PHP_Depend_Util_MathUtil::add($npath, '1');
return PHP_Depend_Util_MathUtil::mul($npath, $data);
}
/**
* This method calculates the NPath Complexity of a switch-statement, the
* meassured value is then returned as a string.
*
* <code>
* switch (<expr>)
* <case-range1>
* <case-range2>
* ...
* <default-range>
*
* -- NP(switch) = NP(<expr>) + NP(<default-range>) + NP(<case-range1>) ... --
* </code>
*
* @return string
*/
private function _calculateSwitchStatement()
{
// Remove <switch> token
next($this->_tokens);
$scope = 0;
$case = '0';
$npath = $this->_sumExpressionComplexity();
while (($token = current($this->_tokens)) !== false) {
switch ($token->type) {
case PHP_Depend_ConstantsI::T_CURLY_BRACE_OPEN:
++$scope;
$token = next($this->_tokens);
break;
case PHP_Depend_ConstantsI::T_CURLY_BRACE_CLOSE:
--$scope;
$token = next($this->_tokens);
break;
case PHP_Depend_ConstantsI::T_CASE:
case PHP_Depend_ConstantsI::T_DEFAULT:
$token = next($this->_tokens);
$npath = PHP_Depend_Util_MathUtil::add($npath, $case);
$case = '1';
break;
default:
$comp = $this->_calculateScopeOrStatement();
$case = PHP_Depend_Util_MathUtil::mul($case, $comp);
break;
}
if ($scope === 0) {
break;
}
}
return PHP_Depend_Util_MathUtil::add($npath, $case);
}
