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classad_merge.cpp

/***************************************************************
 *
 * Copyright (C) 1990-2007, Condor Team, Computer Sciences Department,
 * University of Wisconsin-Madison, WI.
 * 
 * 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 "condor_common.h"
#include "condor_classad.h"
#include "classad_merge.h"

void MergeClassAds(ClassAd *merge_into, ClassAd *merge_from, 
                           bool merge_conflicts)
{

      if (!merge_into || !merge_from) {
            return;
      }

      merge_from->ResetName();
      merge_from->ResetExpr();

      while (1) {
            const char     *name;
            ExprTree       *expression;

            name       = merge_from->NextNameOriginal();
            expression = merge_from->NextExpr();

            if (name == NULL || expression == NULL) {
                  break;
            } else {
                  if (merge_conflicts || !merge_into->Lookup(name)) {
                        ExprTree  *copy_expression;

                        copy_expression = expression->DeepCopy();
                        merge_into->Insert(copy_expression);
                  }
            }
      }

      return;
}

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