The Tor Browser: xpcom/ds/nsStringEnumerator.cpp@6474c204b198 (annotated)

xpcom/ds/nsStringEnumerator.cpp@6474c204b198 (annotated)

xpcom/ds/nsStringEnumerator.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* 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 "nsStringEnumerator.h"
 #include "nsISimpleEnumerator.h"
 #include "nsSupportsPrimitives.h"
 #include "mozilla/Attributes.h"
 #include "nsTArray.h"
 //
 // nsStringEnumerator
 //
 class nsStringEnumerator MOZ_FINAL : public nsIStringEnumerator,
                                      public nsIUTF8StringEnumerator,
                                      public nsISimpleEnumerator
 {
 public:
     nsStringEnumerator(const nsTArray<nsString>* aArray, bool aOwnsArray) :
         mArray(aArray), mIndex(0), mOwnsArray(aOwnsArray), mIsUnicode(true)
     {}
     nsStringEnumerator(const nsTArray<nsCString>* aArray, bool aOwnsArray) :
         mCArray(aArray), mIndex(0), mOwnsArray(aOwnsArray), mIsUnicode(false)
     {}
     nsStringEnumerator(const nsTArray<nsString>* aArray, nsISupports* aOwner) :
         mArray(aArray), mIndex(0), mOwner(aOwner), mOwnsArray(false), mIsUnicode(true)
     {}
     nsStringEnumerator(const nsTArray<nsCString>* aArray, nsISupports* aOwner) :
         mCArray(aArray), mIndex(0), mOwner(aOwner), mOwnsArray(false), mIsUnicode(false)
     {}
     NS_DECL_ISUPPORTS
     NS_DECL_NSIUTF8STRINGENUMERATOR
     // have to declare nsIStringEnumerator manually, because of
     // overlapping method names
     NS_IMETHOD GetNext(nsAString& aResult);
     NS_DECL_NSISIMPLEENUMERATOR
 private:
     ~nsStringEnumerator() {
         if (mOwnsArray) {
             // const-casting is safe here, because the NS_New*
             // constructors make sure mOwnsArray is consistent with
             // the constness of the objects
             if (mIsUnicode)
                 delete const_cast<nsTArray<nsString>*>(mArray);
             else
                 delete const_cast<nsTArray<nsCString>*>(mCArray);
         }
     }
     union {
         const nsTArray<nsString>* mArray;
         const nsTArray<nsCString>* mCArray;
     };
     inline uint32_t Count() {
         return mIsUnicode ? mArray->Length() : mCArray->Length();
     }
     uint32_t mIndex;
     // the owner allows us to hold a strong reference to the object
     // that owns the array. Having a non-null value in mOwner implies
     // that mOwnsArray is false, because we rely on the real owner
     // to release the array
     nsCOMPtr<nsISupports> mOwner;
     bool mOwnsArray;
     bool mIsUnicode;
 };
 NS_IMPL_ISUPPORTS(nsStringEnumerator,
                   nsIStringEnumerator,
                   nsIUTF8StringEnumerator,
                   nsISimpleEnumerator)
 NS_IMETHODIMP
 nsStringEnumerator::HasMore(bool* aResult)
 {
     *aResult = mIndex < Count();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStringEnumerator::HasMoreElements(bool* aResult)
 {
     return HasMore(aResult);
 }
 NS_IMETHODIMP
 nsStringEnumerator::GetNext(nsISupports** aResult)
 {
     if (mIsUnicode) {
         nsSupportsStringImpl* stringImpl = new nsSupportsStringImpl();
         if (!stringImpl) return NS_ERROR_OUT_OF_MEMORY;
         stringImpl->SetData(mArray->ElementAt(mIndex++));
         *aResult = stringImpl;
     }
     else {
         nsSupportsCStringImpl* cstringImpl = new nsSupportsCStringImpl();
         if (!cstringImpl) return NS_ERROR_OUT_OF_MEMORY;
         cstringImpl->SetData(mCArray->ElementAt(mIndex++));
         *aResult = cstringImpl;
     }
     NS_ADDREF(*aResult);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStringEnumerator::GetNext(nsAString& aResult)
 {
     if (NS_WARN_IF(mIndex >= Count()))
         return NS_ERROR_UNEXPECTED;
     if (mIsUnicode)
         aResult = mArray->ElementAt(mIndex++);
     else
         CopyUTF8toUTF16(mCArray->ElementAt(mIndex++), aResult);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStringEnumerator::GetNext(nsACString& aResult)
 {
     if (NS_WARN_IF(mIndex >= Count()))
         return NS_ERROR_UNEXPECTED;
     if (mIsUnicode)
         CopyUTF16toUTF8(mArray->ElementAt(mIndex++), aResult);
     else
         aResult = mCArray->ElementAt(mIndex++);
     return NS_OK;
 }
 template<class T>
 static inline nsresult
 StringEnumeratorTail(T** aResult)
 {
     if (!*aResult)
         return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(*aResult);
     return NS_OK;
 }
 //
 // constructors
 //
 nsresult
 NS_NewStringEnumerator(nsIStringEnumerator** aResult,
                        const nsTArray<nsString>* aArray, nsISupports* aOwner)
 {
     if (NS_WARN_IF(!aResult) || NS_WARN_IF(!aArray))
         return NS_ERROR_INVALID_ARG;
     *aResult = new nsStringEnumerator(aArray, aOwner);
     return StringEnumeratorTail(aResult);
 }
 nsresult
 NS_NewUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
                            const nsTArray<nsCString>* aArray, nsISupports* aOwner)
 {
     if (NS_WARN_IF(!aResult) || NS_WARN_IF(!aArray))
         return NS_ERROR_INVALID_ARG;
     *aResult = new nsStringEnumerator(aArray, aOwner);
     return StringEnumeratorTail(aResult);
 }
 nsresult
 NS_NewAdoptingStringEnumerator(nsIStringEnumerator** aResult,
                                nsTArray<nsString>* aArray)
 {
     if (NS_WARN_IF(!aResult) || NS_WARN_IF(!aArray))
         return NS_ERROR_INVALID_ARG;
     *aResult = new nsStringEnumerator(aArray, true);
     return StringEnumeratorTail(aResult);
 }
 nsresult
 NS_NewAdoptingUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
                                    nsTArray<nsCString>* aArray)
 {
     if (NS_WARN_IF(!aResult) || NS_WARN_IF(!aArray))
         return NS_ERROR_INVALID_ARG;
     *aResult = new nsStringEnumerator(aArray, true);
     return StringEnumeratorTail(aResult);
 }
 // const ones internally just forward to the non-const equivalents
 nsresult
 NS_NewStringEnumerator(nsIStringEnumerator** aResult,
                        const nsTArray<nsString>* aArray)
 {
     if (NS_WARN_IF(!aResult) || NS_WARN_IF(!aArray))
         return NS_ERROR_INVALID_ARG;
     *aResult = new nsStringEnumerator(aArray, false);
     return StringEnumeratorTail(aResult);
 }
 nsresult
 NS_NewUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
                            const nsTArray<nsCString>* aArray)
 {
     if (NS_WARN_IF(!aResult) || NS_WARN_IF(!aArray))
         return NS_ERROR_INVALID_ARG;
     *aResult = new nsStringEnumerator(aArray, false);
     return StringEnumeratorTail(aResult);
 }

The Tor Browser / annotate

xpcom/ds/nsStringEnumerator.cpp@6474c204b198 (annotated)

xpcom/ds/nsStringEnumerator.cpp