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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Log.h"
#include "condition_util.h"
#include <log/event_tag_map.h>
#include <log/log_event_list.h>
#include <log/logprint.h>
#include <utils/Errors.h>
#include <unordered_map>
#include "../matchers/matcher_util.h"
#include "ConditionTracker.h"
#include "frameworks/base/cmds/statsd/src/statsd_config.pb.h"
#include "stats_util.h"
namespace android {
namespace os {
namespace statsd {
using std::set;
using std::string;
using std::unordered_map;
using std::vector;
ConditionState evaluateCombinationCondition(const std::vector<int>& children,
const LogicalOperation& operation,
const std::vector<ConditionState>& conditionCache) {
ConditionState newCondition;
bool hasUnknown = false;
bool hasFalse = false;
bool hasTrue = false;
for (auto childIndex : children) {
ConditionState childState = conditionCache[childIndex];
if (childState == ConditionState::kUnknown) {
hasUnknown = true;
break;
}
if (childState == ConditionState::kFalse) {
hasFalse = true;
}
if (childState == ConditionState::kTrue) {
hasTrue = true;
}
}
// If any child condition is in unknown state, the condition is unknown too.
if (hasUnknown) {
return ConditionState::kUnknown;
}
switch (operation) {
case LogicalOperation::AND: {
newCondition = hasFalse ? ConditionState::kFalse : ConditionState::kTrue;
break;
}
case LogicalOperation::OR: {
newCondition = hasTrue ? ConditionState::kTrue : ConditionState::kFalse;
break;
}
case LogicalOperation::NOT:
newCondition = children.empty() ? ConditionState::kUnknown :
((conditionCache[children[0]] == ConditionState::kFalse) ?
ConditionState::kTrue : ConditionState::kFalse);
break;
case LogicalOperation::NAND:
newCondition = hasFalse ? ConditionState::kTrue : ConditionState::kFalse;
break;
case LogicalOperation::NOR:
newCondition = hasTrue ? ConditionState::kFalse : ConditionState::kTrue;
break;
case LogicalOperation::LOGICAL_OPERATION_UNSPECIFIED:
newCondition = ConditionState::kFalse;
break;
}
return newCondition;
}
ConditionState operator|(ConditionState l, ConditionState r) {
return l >= r ? l : r;
}
} // namespace statsd
} // namespace os
} // namespace android
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