/**
* Analyzes the given method call
*
* @param PC_Obj_Call $call the call
*/
private function analyze_method_call($call)
{
$name = $call->get_function();
$classname = $call->get_class();
$c = $this->env->get_types()->get_class($classname);
if ($c !== null) {
if (!$c->contains_method($name)) {
// no obj-creation here because the constructor can be named '__construct' or
// '<classname>'. the call uses always '__construct'.
if (!$call->is_object_creation() && !$this->is_method_of_sub($c, $name)) {
$this->report($call, 'The method "' . $name . '" does not exist in the class "#' . $classname . '#"!', PC_Obj_Error::E_S_METHOD_MISSING);
}
} else {
if ($call->is_object_creation() && $c->is_abstract()) {
$this->report($call, 'You can\'t instantiate the abstract class "#' . $c->get_name() . '#"!', PC_Obj_Error::E_S_ABSTRACT_CLASS_INSTANTIATION);
} else {
// check for static / not static
$m = $c->get_method($name);
if ($call->is_static() && !$m->is_static()) {
$this->report($call, 'Your call "' . $this->get_call_link($call) . '" calls "' . $m->get_name() . '" statically, but the method is not static!', PC_Obj_Error::E_S_STATIC_CALL);
} else {
if (!$call->is_static() && $m->is_static()) {
$this->report($call, 'Your call "' . $this->get_call_link($call) . '" calls "' . $m->get_name() . '" not statically, but the method is static!', PC_Obj_Error::E_S_NONSTATIC_CALL);
}
}
$this->check_params($call, $m);
}
}
} else {
$this->report($call, 'The class "#' . $classname . '#" does not exist!', PC_Obj_Error::E_S_CLASS_MISSING);
}
}
/**
* Adds a function-call
*
* @param PC_Obj_MultiType $class the class-name (or null)
* @param PC_Obj_MultiType $func the function-name
* @param array $args the function-arguments
* @param bool $static whether its a static call
* @return PC_Obj_MultiType the result
*/
public function add_call($class, $func, $args, $static = false)
{
if ($class !== null && !$class instanceof PC_Obj_MultiType) {
return $this->handle_error('$class is invalid');
}
if (!$func instanceof PC_Obj_MultiType) {
return $this->handle_error('$func is invalid');
}
if (!is_array($args)) {
return $this->handle_error('$args is invalid');
}
// if we don't know the function- or class-name, we can't do anything here
$cname = $class !== null ? $class->get_string() : null;
$fname = $func->get_string();
if ($fname === null || $class !== null && $cname === null) {
return $this->create_unknown();
}
// create call
$call = new PC_Obj_Call($this->get_file(), $this->get_line());
// determine class- and function-name
$call->set_function($fname);
// do it manually here because we might not know the method
$call->set_object_creation(strcasecmp($fname, '__construct') == 0 || strcasecmp($fname, $cname) == 0);
if ($class !== null) {
// support for php4 constructors
if (strcasecmp($cname, $fname) == 0) {
$call->set_object_creation(true);
} else {
if (strcasecmp($cname, 'parent') == 0) {
// in this case its no object-creation for us because it would lead to reports like
// instantiation of abstract classes when calling the constructor of an abstract
// parent-class
$call->set_object_creation(false);
$cname = $this->scope->get_name_of(T_CLASS_C);
$classobj = $this->env->get_types()->get_class($cname);
if ($classobj === null || $classobj->get_super_class() == '') {
return $this->create_unknown();
}
$cname = $classobj->get_super_class();
// if we're in a static method, the call is always static
$curfname = $this->scope->get_name_of(T_FUNC_C);
$curfunc = $classobj->get_method($curfname);
if ($curfunc === null || $curfunc->is_static()) {
$static = true;
} else {
// if we're in a non-static method, its a static-call if the method we're calling is
// static, and not if its not. i.e. we basically don't detect errors here
$func = null;
$super = $this->env->get_types()->get_class($cname);
if ($super !== null) {
$func = $super->get_method($fname);
}
$static = $func !== null && $func->is_static();
}
} else {
if (strcasecmp($cname, 'self') == 0) {
$cname = $this->scope->get_name_of(T_CLASS_C);
// self is static if its not a constructor-call
$static = !$call->is_object_creation();
}
}
}
$call->set_class($cname);
}
// clone because it might be a variable
foreach ($args as $arg) {
if (!$arg instanceof PC_Obj_MultiType) {
$this->handle_error('$arg is invalid');
continue;
}
$call->add_argument(clone $arg);
}
$call->set_static($static);
$this->env->get_types()->add_call($call);
$funcobj = $this->env->get_types()->get_method_or_func($cname, $fname);
$this->calls_analyzer->analyze($call);
$this->modifiers_analyzer->analyze($this->scope, $call, $funcobj);
if ($funcobj === null) {
// if it's a constructor, we still know the type
if ($call->is_object_creation()) {
return PC_Obj_MultiType::create_object($cname);
}
return $this->create_unknown();
}
// reference parameters implicitly create variables
$i = 0;
foreach ($funcobj->get_params() as $param) {
if ($i >= count($args)) {
break;
}
// this is a hack: we store the variable name for missing variable names when the variable
// appears. when detecting calls, we check whether there are reference parameters and then
// use the name to implicitly create the variable
if ($param->is_reference() && $args[$i]->get_missing_varname() !== null) {
$var = new PC_Obj_Variable($this->get_file(), $this->get_line(), $args[$i]->get_missing_varname(), clone $param->get_mtype());
$this->vars->set($this->scope->get_name(), $var);
$args[$i]->set_missing_varname(null);
}
$i++;
}
$this->req_analyzer->analyze($call, $funcobj->get_version()->get_min(), $funcobj->get_version()->get_max());
// add the throws of the method to our throws
foreach (array_keys($funcobj->get_throws()) as $tclass) {
$this->throws_analyzer->add(PC_Obj_Method::THROW_FUNC, PC_Obj_MultiType::create_object($tclass));
}
// if its a constructor we know the type directly
if ($call->is_object_creation()) {
return PC_Obj_MultiType::create_object($cname);
}
return clone $funcobj->get_return_type();
}
/**
* Builds the fields to insert for the given call and project
*
* @param PC_Obj_Call $call the call
* @param PC_Project $project the project
* @return array an associative array with the fields
*/
private function build_fields($call, $project)
{
$args = serialize($call->get_arguments());
if (strlen($args) > self::MAX_ARGS_LEN) {
$arglist = array();
foreach ($call->get_arguments() as $arg) {
$arg->clear_values();
$arglist[] = $arg;
}
$args = serialize($arglist);
}
return array('project_id' => $project !== null ? $project->get_id() : 0, 'file' => $call->get_file(), 'line' => $call->get_line(), 'function' => $call->get_function(), 'class' => $call->get_class() === null ? null : $call->get_class(), 'static' => $call->is_static() ? 1 : 0, 'objcreation' => $call->is_object_creation() ? 1 : 0, 'arguments' => $args);
}