sbHashtableUtils.h

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 * This file may be licensed under the terms of of the
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#ifndef SBHASHTABLEUTILS_H_
#define SBHASHTABLEUTILS_H_

#include <nsIMutableArray.h>
#include <nsDataHashtable.h>
#include <nsTArray.h>

template <class T>
PLDHashOperator HashCopierEnumerator(typename T::KeyType aKey,
                                     typename T::DataType aData,
                                     void* userArg)
{
  NS_ASSERTION(userArg, "ArrayBuilder passed a null arg");
  typename T::Hashtable * table = reinterpret_cast<typename T::Hashtable*>(userArg);

  PRBool added = table->Put(aKey, aData);
  NS_ENSURE_TRUE(added, PL_DHASH_STOP);

  return PL_DHASH_NEXT;
}

template <class T>
nsresult sbCopyHashtable(typename T::Hashtable const & aSource,
                         typename T::Hashtable & aDest)
{
  aSource.EnumerateRead(&HashCopierEnumerator<T>,
                        &aDest);

  return NS_OK;
}

template <class E>
PLDHashOperator THashCOMPtrCopierToIArrayEnumerator(E* aKey,
                                                    void* userArg)
{
  NS_ASSERTION(userArg, "ArrayBuilder passed a null arg");
  nsIMutableArray* array =
    reinterpret_cast<nsIMutableArray*>(userArg);

  nsresult rv = array->AppendElement(aKey->GetKey(), PR_FALSE);
  NS_ENSURE_SUCCESS(rv, PL_DHASH_STOP);

  return PL_DHASH_NEXT;
}

template <class T>
nsresult sbCopyHashtableToArray(class nsTHashtable<T> & aSource,
                                nsIMutableArray* aDest)
{
  NS_ENSURE_ARG_POINTER(aDest);

  aSource.EnumerateEntries(&THashCOMPtrCopierToIArrayEnumerator<T>,
                           aDest);

  return NS_OK;
}

#endif /* SBHASHTABLEUTILS_H_ */