Quelle nsCOMArray.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsCOMArray.h"

#include "mozilla/MemoryReporting.h"
#include "mozilla/OperatorNewExtensions.h"

#include "nsCOMPtr.h"

// This specialization is private to nsCOMArray.
// It exists solely to automatically zero-out newly created array elements.
template <>
class nsTArrayElementTraits<nsISupports*> {
  typedef nsISupports* E;

public:
  // Zero out the value
  static inline void Construct(E* aE) {
    new (mozilla::KnownNotNull, static_cast<void*>(aE)) E();
  }
  // Invoke the copy-constructor in place.
  template <class A>
  static inline void Construct(E* aE, const A& aArg) {
    new (mozilla::KnownNotNull, static_cast<void*>(aE)) E(aArg);
  }
  // Construct in place.
  template <class... Args>
  static inline void Emplace(E* aE, Args&&... aArgs) {
    new (mozilla::KnownNotNull, static_cast<void*>(aE))
        E(std::forward<Args>(aArgs)...);
  }
  // Invoke the destructor in place.
  static inline void Destruct(E* aE) { aE->~E(); }
};

static void ReleaseObjects(nsTArray<nsISupports*>& aArray);

// implementations of non-trivial methods in nsCOMArray_base

nsCOMArray_base::nsCOMArray_base(const nsCOMArray_base& aOther) {
  // make sure we do only one allocation
  mArray.SetCapacity(aOther.Count());
  AppendObjects(aOther);
}

nsCOMArray_base::~nsCOMArray_base() { Clear(); }

int32_t nsCOMArray_base::IndexOf(nsISupports* aObject,
                                 uint32_t aStartIndex) const {
  return mArray.IndexOf(aObject, aStartIndex);
}

int32_t nsCOMArray_base::IndexOfObject(nsISupports* aObject) const {
  nsCOMPtr<nsISupports> supports = do_QueryInterface(aObject);
  if (NS_WARN_IF(!supports)) {
    return -1;
  }

  uint32_t i, count;
  int32_t retval = -1;
  count = mArray.Length();
  for (i = 0; i < count; ++i) {
    nsCOMPtr<nsISupports> arrayItem = do_QueryInterface(mArray[i]);
    if (arrayItem == supports) {
      retval = i;
      break;
    }
  }
  return retval;
}

bool nsCOMArray_base::EnumerateForwards(nsBaseArrayEnumFunc aFunc,
                                        void* aData) const {
  for (uint32_t index = 0; index < mArray.Length(); ++index) {
    if (!(*aFunc)(mArray[index], aData)) {
      return false;
    }
  }

  return true;
}

bool nsCOMArray_base::EnumerateBackwards(nsBaseArrayEnumFunc aFunc,
                                         void* aData) const {
  for (uint32_t index = mArray.Length(); index--;) {
    if (!(*aFunc)(mArray[index], aData)) {
      return false;
    }
  }

  return true;
}

bool nsCOMArray_base::InsertObjectAt(nsISupports* aObject, int32_t aIndex) {
  if ((uint32_t)aIndex > mArray.Length()) {
    return false;
  }

  mArray.InsertElementAt(aIndex, aObject);

  NS_IF_ADDREF(aObject);
  return true;
}

void nsCOMArray_base::InsertElementAt(uint32_t aIndex, nsISupports* aElement) {
  mArray.InsertElementAt(aIndex, aElement);
  NS_IF_ADDREF(aElement);
}

void nsCOMArray_base::InsertElementAt(uint32_t aIndex,
                                      already_AddRefed<nsISupports> aElement) {
  mArray.InsertElementAt(aIndex, aElement.take());
}

bool nsCOMArray_base::InsertObjectsAt(const nsCOMArray_base& aObjects,
                                      int32_t aIndex) {
  if ((uint32_t)aIndex > mArray.Length()) {
    return false;
  }

  mArray.InsertElementsAt(aIndex, aObjects.mArray);

  // need to addref all these
  uint32_t count = aObjects.Length();
  for (uint32_t i = 0; i < count; ++i) {
    NS_IF_ADDREF(aObjects[i]);
  }

  return true;
}

void nsCOMArray_base::InsertElementsAt(uint32_t aIndex,
                                       const nsCOMArray_base& aElements) {
  mArray.InsertElementsAt(aIndex, aElements.mArray);

  // need to addref all these
  uint32_t count = aElements.Length();
  for (uint32_t i = 0; i < count; ++i) {
    NS_IF_ADDREF(aElements[i]);
  }
}

void nsCOMArray_base::InsertElementsAt(uint32_t aIndex,
                                       nsISupports* const* aElements,
                                       uint32_t aCount) {
  mArray.InsertElementsAt(aIndex, aElements, aCount);

  // need to addref all these
  for (uint32_t i = 0; i < aCount; ++i) {
    NS_IF_ADDREF(aElements[i]);
  }
}

void nsCOMArray_base::ReplaceObjectAt(nsISupports* aObject, int32_t aIndex) {
  mArray.EnsureLengthAtLeast(aIndex + 1);
  nsISupports* oldObject = mArray[aIndex];
  // Make sure to addref first, in case aObject == oldObject
  NS_IF_ADDREF(mArray[aIndex] = aObject);
  NS_IF_RELEASE(oldObject);
}

bool nsCOMArray_base::RemoveObject(nsISupports* aObject) {
  bool result = mArray.RemoveElement(aObject);
  if (result) {
    NS_IF_RELEASE(aObject);
  }
  return result;
}

bool nsCOMArray_base::RemoveObjectAt(int32_t aIndex) {
  if (uint32_t(aIndex) < mArray.Length()) {
    nsISupports* element = mArray[aIndex];

    mArray.RemoveElementAt(aIndex);
    NS_IF_RELEASE(element);
    return true;
  }

  return false;
}

void nsCOMArray_base::RemoveElementAt(uint32_t aIndex) {
  nsISupports* element = mArray[aIndex];
  mArray.RemoveElementAt(aIndex);
  NS_IF_RELEASE(element);
}

bool nsCOMArray_base::RemoveObjectsAt(int32_t aIndex, int32_t aCount) {
  if (uint32_t(aIndex) + uint32_t(aCount) <= mArray.Length()) {
    nsTArray<nsISupports*> elementsToDestroy(aCount);
    elementsToDestroy.AppendElements(mArray.Elements() + aIndex, aCount);
    mArray.RemoveElementsAt(aIndex, aCount);
    ReleaseObjects(elementsToDestroy);
    return true;
  }

  return false;
}

void nsCOMArray_base::RemoveElementsAt(uint32_t aIndex, uint32_t aCount) {
  nsTArray<nsISupports*> elementsToDestroy(aCount);
  elementsToDestroy.AppendElements(mArray.Elements() + aIndex, aCount);
  mArray.RemoveElementsAt(aIndex, aCount);
  ReleaseObjects(elementsToDestroy);
}

// useful for destructors
void ReleaseObjects(nsTArray<nsISupports*>& aArray) {
  for (uint32_t i = 0; i < aArray.Length(); ++i) {
    NS_IF_RELEASE(aArray[i]);
  }
}

void nsCOMArray_base::Clear() {
  nsTArray<nsISupports*> objects = std::move(mArray);
  ReleaseObjects(objects);
}

bool nsCOMArray_base::SetCount(int32_t aNewCount) {
  NS_ASSERTION(aNewCount >= 0, "SetCount(negative index)");
  if (aNewCount < 0) {
    return false;
  }

  int32_t count = mArray.Length();
  if (count > aNewCount) {
    RemoveObjectsAt(aNewCount, mArray.Length() - aNewCount);
  }
  mArray.SetLength(aNewCount);
  return true;
}

quality88%

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.