Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 224 insertions, 0 deletions

diff --git a/src/libs/xpcom18a4/xpcom/io/nsInputStreamTee.cpp b/src/libs/xpcom18a4/xpcom/io/nsInputStreamTee.cpp
new file mode 100644
index 00000000..b0651ad1
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/io/nsInputStreamTee.cpp
@@ -0,0 +1,224 @@
+/* -*- Mode: C++; tab-width: 2; 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 mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com> (original author)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of 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 "nsIInputStreamTee.h"
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+#include "nsCOMPtr.h"
+
+class nsInputStreamTee : public nsIInputStreamTee
+{
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSIINPUTSTREAM
+    NS_DECL_NSIINPUTSTREAMTEE
+
+    nsInputStreamTee();
+
+private:
+    ~nsInputStreamTee() {}
+
+    nsresult TeeSegment(const char *buf, PRUint32 count);
+
+    static NS_METHOD WriteSegmentFun(nsIInputStream *, void *, const char *,
+                                     PRUint32, PRUint32, PRUint32 *);
+
+private:
+    nsCOMPtr<nsIInputStream>  mSource;
+    nsCOMPtr<nsIOutputStream> mSink;
+    nsWriteSegmentFun         mWriter;  // for implementing ReadSegments
+    void                     *mClosure; // for implementing ReadSegments
+};
+
+nsInputStreamTee::nsInputStreamTee()
+{
+}
+
+nsresult
+nsInputStreamTee::TeeSegment(const char *buf, PRUint32 count)
+{
+    if (!mSink)
+        return NS_OK; // nothing to do
+    nsresult rv;
+    PRUint32 bytesWritten = 0;
+    while (count) {
+        rv = mSink->Write(buf + bytesWritten, count, &bytesWritten);
+        if (NS_FAILED(rv)) {
+            // ok, this is not a fatal error... just drop our reference to mSink
+            // and continue on as if nothing happened.
+            NS_WARNING("Write failed (non-fatal)");
+            // catch possible misuse of the input stream tee
+            NS_ASSERTION(rv != NS_BASE_STREAM_WOULD_BLOCK, "sink must be a blocking stream");
+            mSink = 0;
+            break;
+        }
+        NS_ASSERTION(bytesWritten <= count, "wrote too much");
+        count -= bytesWritten;
+    }
+    return NS_OK;
+}
+
+NS_METHOD
+nsInputStreamTee::WriteSegmentFun(nsIInputStream *in, void *closure, const char *fromSegment,
+                                  PRUint32 offset, PRUint32 count, PRUint32 *writeCount)
+{
+    nsInputStreamTee *tee = NS_REINTERPRET_CAST(nsInputStreamTee *, closure);
+
+    nsresult rv = tee->mWriter(in, tee->mClosure, fromSegment, offset, count, writeCount);
+    if (NS_FAILED(rv) || (*writeCount == 0)) {
+        NS_ASSERTION((NS_FAILED(rv) ? (*writeCount == 0) : PR_TRUE),
+                "writer returned an error with non-zero writeCount");
+        return rv;
+    }
+
+    return tee->TeeSegment(fromSegment, *writeCount);
+}
+
+NS_IMPL_ISUPPORTS2(nsInputStreamTee,
+                   nsIInputStreamTee,
+                   nsIInputStream)
+
+NS_IMETHODIMP
+nsInputStreamTee::Close()
+{
+    NS_ENSURE_TRUE(mSource, NS_ERROR_NOT_INITIALIZED);
+    nsresult rv = mSource->Close();
+    mSource = 0;
+    mSink = 0;
+    return rv;
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::Available(PRUint32 *avail)
+{
+    NS_ENSURE_TRUE(mSource, NS_ERROR_NOT_INITIALIZED);
+    return mSource->Available(avail);
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::Read(char *buf, PRUint32 count, PRUint32 *bytesRead)
+{
+    NS_ENSURE_TRUE(mSource, NS_ERROR_NOT_INITIALIZED);
+
+    nsresult rv = mSource->Read(buf, count, bytesRead);
+    if (NS_FAILED(rv) || (*bytesRead == 0))
+        return rv;
+
+    return TeeSegment(buf, *bytesRead);
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::ReadSegments(nsWriteSegmentFun writer, 
+                               void *closure,
+                               PRUint32 count,
+                               PRUint32 *bytesRead)
+{
+    NS_ENSURE_TRUE(mSource, NS_ERROR_NOT_INITIALIZED);
+
+    mWriter = writer;
+    mClosure = closure;
+
+    return mSource->ReadSegments(WriteSegmentFun, this, count, bytesRead);
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::IsNonBlocking(PRBool *result)
+{
+    NS_ENSURE_TRUE(mSource, NS_ERROR_NOT_INITIALIZED);
+    return mSource->IsNonBlocking(result);
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::SetSource(nsIInputStream *source)
+{
+    mSource = source;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::GetSource(nsIInputStream **source)
+{
+    NS_IF_ADDREF(*source = mSource);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::SetSink(nsIOutputStream *sink)
+{
+#ifdef DEBUG
+    if (sink) {
+        PRBool nonBlocking;
+        nsresult rv = sink->IsNonBlocking(&nonBlocking);
+        if (NS_FAILED(rv) || nonBlocking)
+            NS_ERROR("sink should be a blocking stream");
+    }
+#endif
+    mSink = sink;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsInputStreamTee::GetSink(nsIOutputStream **sink)
+{
+    NS_IF_ADDREF(*sink = mSink);
+    return NS_OK;
+}
+
+// factory method
+
+NS_COM nsresult 
+NS_NewInputStreamTee(nsIInputStream **result,
+                     nsIInputStream *source,
+                     nsIOutputStream *sink)
+{
+    nsresult rv;
+    
+    nsCOMPtr<nsIInputStreamTee> tee;
+    NS_NEWXPCOM(tee, nsInputStreamTee);
+    if (!tee)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    rv = tee->SetSource(source);
+    if (NS_FAILED(rv)) return rv;
+
+    rv = tee->SetSink(sink);
+    if (NS_FAILED(rv)) return rv;
+
+    NS_ADDREF(*result = tee);
+    return rv;
+}