/*
* Helper method from converting between a PHP function and a CufIter.
*/
bool vm_decode_function_cufiter(const Variant& function,
CufIterPtr& cufIter) {
ObjectData* obj = nullptr;
Class* cls = nullptr;
StringData* invName = nullptr;
// Don't warn here, let the caller decide what to do if the func is nullptr.
const HPHP::Func* func = vm_decode_function(function, GetCallerFrame(), false,
obj, cls, invName,
DecodeFlags::NoWarn);
if (func == nullptr) {
return false;
}
cufIter = req::make_unique<CufIter>();
cufIter->setFunc(func);
cufIter->setName(invName);
if (obj) {
cufIter->setCtx(obj);
obj->incRefCount();
} else {
cufIter->setCtx(cls);
}
return true;
}
static bool modify_extract_name(VarEnv* v,
String& name,
int64_t extract_type,
const String& prefix) {
switch (extract_type) {
case EXTR_SKIP:
if (v->lookup(name.get()) != nullptr) {
return false;
}
break;
case EXTR_IF_EXISTS:
if (v->lookup(name.get()) == nullptr) {
return false;
} else {
goto namechecks;
}
break;
case EXTR_PREFIX_SAME:
if (v->lookup(name.get()) != nullptr) {
name = prefix + "_" + name;
} else {
goto namechecks;
}
break;
case EXTR_PREFIX_ALL:
name = prefix + "_" + name;
break;
case EXTR_PREFIX_INVALID:
if (!is_valid_var_name(name.get()->data(), name.size())) {
name = prefix + "_" + name;
} else {
goto namechecks;
}
break;
case EXTR_PREFIX_IF_EXISTS:
if (v->lookup(name.get()) == nullptr) {
return false;
}
name = prefix + "_" + name;
break;
case EXTR_OVERWRITE:
namechecks:
if (name == s_GLOBALS) {
return false;
}
if (name == s_this) {
// Only disallow $this when inside a non-static method, or a static method
// that has defined $this (matches Zend)
auto const func = arGetContextFunc(GetCallerFrame());
if (func && func->isMethod() && v->lookup(s_this.get()) != nullptr) {
return false;
}
}
default:
break;
}
// skip invalid variable names, as in PHP
return is_valid_var_name(name.get()->data(), name.size());
}
