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-rw-r--r--src/libs/xpcom18a4/xpcom/ds/nsStringEnumerator.cpp261
1 files changed, 261 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/ds/nsStringEnumerator.cpp b/src/libs/xpcom18a4/xpcom/ds/nsStringEnumerator.cpp
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+++ b/src/libs/xpcom18a4/xpcom/ds/nsStringEnumerator.cpp
@@ -0,0 +1,261 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is String Enumerator.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Alec Flett <alecf@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+
+#include "nsStringEnumerator.h"
+#include "prtypes.h"
+#include "nsCRT.h"
+#include "nsString.h"
+#include "nsReadableUtils.h"
+#include "nsISimpleEnumerator.h"
+#include "nsSupportsPrimitives.h"
+
+//
+// nsStringEnumerator
+//
+
+class nsStringEnumerator : public nsIStringEnumerator,
+ public nsIUTF8StringEnumerator,
+ public nsISimpleEnumerator
+{
+public:
+ nsStringEnumerator(const nsStringArray* aArray, PRBool aOwnsArray) :
+ mArray(aArray), mIndex(0), mOwnsArray(aOwnsArray), mIsUnicode(PR_TRUE)
+ {}
+
+ nsStringEnumerator(const nsCStringArray* aArray, PRBool aOwnsArray) :
+ mCArray(aArray), mIndex(0), mOwnsArray(aOwnsArray), mIsUnicode(PR_FALSE)
+ {}
+
+ nsStringEnumerator(const nsStringArray* aArray, nsISupports* aOwner) :
+ mArray(aArray), mIndex(0), mOwner(aOwner), mOwnsArray(PR_FALSE), mIsUnicode(PR_TRUE)
+ {}
+
+ nsStringEnumerator(const nsCStringArray* aArray, nsISupports* aOwner) :
+ mCArray(aArray), mIndex(0), mOwner(aOwner), mOwnsArray(PR_FALSE), mIsUnicode(PR_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 NS_CONST_CAST(nsStringArray*,mArray);
+ else
+ delete NS_CONST_CAST(nsCStringArray*,mCArray);
+ }
+ }
+
+ union {
+ const nsStringArray* mArray;
+ const nsCStringArray* mCArray;
+ };
+
+ inline PRUint32 Count() {
+ return mIsUnicode ? mArray->Count() : mCArray->Count();
+ }
+
+ PRUint32 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 PR_FALSE, because we rely on the real owner
+ // to release the array
+ nsCOMPtr<nsISupports> mOwner;
+ PRPackedBool mOwnsArray;
+ PRPackedBool mIsUnicode;
+};
+
+NS_IMPL_ISUPPORTS3(nsStringEnumerator,
+ nsIStringEnumerator,
+ nsIUTF8StringEnumerator,
+ nsISimpleEnumerator)
+
+NS_IMETHODIMP
+nsStringEnumerator::HasMore(PRBool* aResult)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+ *aResult = mIndex < Count();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsStringEnumerator::HasMoreElements(PRBool* 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->StringAt(mIndex++));
+ *aResult = stringImpl;
+ }
+ else {
+ nsSupportsCStringImpl* cstringImpl = new nsSupportsCStringImpl();
+ if (!cstringImpl) return NS_ERROR_OUT_OF_MEMORY;
+
+ cstringImpl->SetData(*mCArray->CStringAt(mIndex++));
+ *aResult = cstringImpl;
+ }
+ NS_ADDREF(*aResult);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsStringEnumerator::GetNext(nsAString& aResult)
+{
+ NS_ENSURE_TRUE(mIndex < Count(), NS_ERROR_UNEXPECTED);
+
+ if (mIsUnicode)
+ aResult = *mArray->StringAt(mIndex++);
+ else
+ CopyUTF8toUTF16(*mCArray->CStringAt(mIndex++), aResult);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsStringEnumerator::GetNext(nsACString& aResult)
+{
+ NS_ENSURE_TRUE(mIndex < Count(), NS_ERROR_UNEXPECTED);
+
+ if (mIsUnicode)
+ CopyUTF16toUTF8(*mArray->StringAt(mIndex++), aResult);
+ else
+ aResult = *mCArray->CStringAt(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
+//
+
+NS_COM nsresult
+NS_NewStringEnumerator(nsIStringEnumerator** aResult,
+ const nsStringArray* aArray, nsISupports* aOwner)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+ NS_ENSURE_ARG_POINTER(aArray);
+
+ *aResult = new nsStringEnumerator(aArray, aOwner);
+ return StringEnumeratorTail(aResult);
+}
+
+
+NS_COM nsresult
+NS_NewUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
+ const nsCStringArray* aArray, nsISupports* aOwner)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+ NS_ENSURE_ARG_POINTER(aArray);
+
+ *aResult = new nsStringEnumerator(aArray, aOwner);
+ return StringEnumeratorTail(aResult);
+}
+
+NS_COM nsresult
+NS_NewAdoptingStringEnumerator(nsIStringEnumerator** aResult,
+ nsStringArray* aArray)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+ NS_ENSURE_ARG_POINTER(aArray);
+
+ *aResult = new nsStringEnumerator(aArray, PR_TRUE);
+ return StringEnumeratorTail(aResult);
+}
+
+NS_COM nsresult
+NS_NewAdoptingUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
+ nsCStringArray* aArray)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+ NS_ENSURE_ARG_POINTER(aArray);
+
+ *aResult = new nsStringEnumerator(aArray, PR_TRUE);
+ return StringEnumeratorTail(aResult);
+}
+
+// const ones internally just forward to the non-const equivalents
+NS_COM nsresult
+NS_NewStringEnumerator(nsIStringEnumerator** aResult,
+ const nsStringArray* aArray)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+ NS_ENSURE_ARG_POINTER(aArray);
+
+ *aResult = new nsStringEnumerator(aArray, PR_FALSE);
+ return StringEnumeratorTail(aResult);
+}
+
+NS_COM nsresult
+NS_NewUTF8StringEnumerator(nsIUTF8StringEnumerator** aResult,
+ const nsCStringArray* aArray)
+{
+ NS_ENSURE_ARG_POINTER(aResult);
+ NS_ENSURE_ARG_POINTER(aArray);
+
+ *aResult = new nsStringEnumerator(aArray, PR_FALSE);
+ return StringEnumeratorTail(aResult);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 11:19:17 +0000