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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 "orc/sargs/TruthValue.hh"
#include <stdexcept>
namespace orc {
TruthValue operator||(TruthValue left, TruthValue right) {
if (right == TruthValue::YES || left == TruthValue::YES) {
return TruthValue::YES;
}
if (right == TruthValue::YES_NULL || left == TruthValue::YES_NULL) {
return TruthValue::YES_NULL;
}
if (right == TruthValue::NO) {
return left;
}
if (left == TruthValue::NO) {
return right;
}
if (left == TruthValue::IS_NULL) {
if (right == TruthValue::NO_NULL || right == TruthValue::IS_NULL) {
return TruthValue::IS_NULL;
} else {
return TruthValue::YES_NULL;
}
}
if (right == TruthValue::IS_NULL) {
if (left == TruthValue::NO_NULL) {
return TruthValue::IS_NULL;
} else {
return TruthValue::YES_NULL;
}
}
if (left == TruthValue::NO_NULL && right == TruthValue::NO_NULL) {
return TruthValue::NO_NULL;
}
return TruthValue::YES_NO_NULL;
}
TruthValue operator&&(TruthValue left, TruthValue right) {
if (right == TruthValue::NO || left == TruthValue::NO) {
return TruthValue::NO;
}
if (right == TruthValue::NO_NULL || left == TruthValue::NO_NULL) {
return TruthValue::NO_NULL;
}
if (right == TruthValue::YES) {
return left;
}
if (left == TruthValue::YES) {
return right;
}
if (left == TruthValue::IS_NULL) {
if (right == TruthValue::YES_NULL || right == TruthValue::IS_NULL) {
return TruthValue::IS_NULL;
} else {
return TruthValue::NO_NULL;
}
}
if (right == TruthValue::IS_NULL) {
if (left == TruthValue::YES_NULL) {
return TruthValue::IS_NULL;
} else {
return TruthValue::NO_NULL;
}
}
if (left == TruthValue::YES_NULL && right == TruthValue::YES_NULL) {
return TruthValue::YES_NULL;
}
return TruthValue::YES_NO_NULL;
}
TruthValue operator!(TruthValue val) {
switch (val) {
case TruthValue::NO:
return TruthValue::YES;
case TruthValue::YES:
return TruthValue::NO;
case TruthValue::IS_NULL:
case TruthValue::YES_NO:
case TruthValue::YES_NO_NULL:
return val;
case TruthValue::NO_NULL:
return TruthValue::YES_NULL;
case TruthValue::YES_NULL:
return TruthValue::NO_NULL;
default:
throw std::invalid_argument("Unknown TruthValue");
}
}
bool isNeeded(TruthValue val) {
switch (val) {
case TruthValue::NO:
case TruthValue::IS_NULL:
case TruthValue::NO_NULL:
return false;
case TruthValue::YES:
case TruthValue::YES_NO:
case TruthValue::YES_NULL:
case TruthValue::YES_NO_NULL:
default:
return true;
}
}
} // namespace orc
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