First Checked In.

base/public/nsFileSpecStreaming.h

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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+//    Functions for nsPersistentFileDescriptor that depend on streams, and so
+//    cannot be made independent of base.
+
+#include "nscore.h"
+#include "nsError.h"
+
+class nsPersistentFileDescriptor;
+class nsInputStream;
+class nsOutputStream;
+class nsIInputStream;
+class nsIOutputStream;
+class nsFileURL;
+class nsFileSpec;
+
+NS_BASE nsOutputStream& operator << (nsOutputStream& s, const nsFileURL& spec);
+NS_BASE nsresult ReadDescriptor(
+	nsIInputStream* aStream, nsPersistentFileDescriptor&);
+NS_BASE nsresult WriteDescriptor(
+	nsIOutputStream* aStream,
+	const nsPersistentFileDescriptor&);
+        // writes the data to a file
+NS_BASE nsInputStream& operator >> (
+    nsInputStream&,
+    nsPersistentFileDescriptor&);
+        // reads the data from a file
+NS_BASE nsOutputStream& operator << (
+    nsOutputStream&,
+    const nsPersistentFileDescriptor&);
+    	// writes the data to a file

base/src/nsFileSpecStreaming.cpp

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+#include "nsFileSpecStreaming.h"
+
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+#include "nsFileStream.h"
+#include "nsFileSpec.h"
+
+#define MAX_PERSISTENT_DATA_SIZE 1000
+
+//----------------------------------------------------------------------------------------
+nsOutputStream& operator << (nsOutputStream& s, const nsFileURL& url)
+//----------------------------------------------------------------------------------------
+{
+    return s << url.GetURLString();
+}
+
+//----------------------------------------------------------------------------------------
+nsresult ReadDescriptor(
+    nsIInputStream* aStream,
+    nsPersistentFileDescriptor& desc)
+//----------------------------------------------------------------------------------------
+{
+    nsInputStream inputStream(aStream);
+    inputStream >> desc;
+    return NS_OK;
+}
+
+//----------------------------------------------------------------------------------------
+nsresult WriteDescriptor(
+    nsIOutputStream* aStream,
+    const nsPersistentFileDescriptor& desc)
+//----------------------------------------------------------------------------------------
+{
+    nsOutputStream outputStream(aStream);
+    outputStream << desc;
+    return NS_OK;
+}
+
+//----------------------------------------------------------------------------------------
+nsInputStream& operator >> (nsInputStream& s, nsPersistentFileDescriptor& d)
+// reads the data from a file
+//----------------------------------------------------------------------------------------
+{
+    char bigBuffer[MAX_PERSISTENT_DATA_SIZE + 1];
+    // The first 8 bytes of the data should be a hex version of the data size to follow.
+    PRInt32 bytesRead = 8;
+    bytesRead = s.read(bigBuffer, bytesRead);
+    if (bytesRead != 8)
+        return s;
+    bigBuffer[8] = '\0';
+    sscanf(bigBuffer, "%x", (PRUint32*)&bytesRead);
+    if (bytesRead > MAX_PERSISTENT_DATA_SIZE)
+    {
+        // Try to tolerate encoded values with no length header
+        bytesRead = 8 + s.read(bigBuffer + 8, MAX_PERSISTENT_DATA_SIZE - 8);
+    }
+    else
+    {
+        // Now we know how many bytes to read, do it.
+        bytesRead = s.read(bigBuffer, bytesRead);
+    }
+    d.SetData(bigBuffer, bytesRead);
+    return s;
+}
+
+//----------------------------------------------------------------------------------------
+nsOutputStream& operator << (nsOutputStream& s, const nsPersistentFileDescriptor& d)
+// writes the data to a file
+//----------------------------------------------------------------------------------------
+{
+    char littleBuf[9];
+    PRInt32 dataSize;
+    nsSimpleCharString data;
+    d.GetData(data, dataSize);
+    // First write (in hex) the length of the data to follow.  Exactly 8 bytes
+    sprintf(littleBuf, "%0.8x", dataSize);
+    s << littleBuf;
+    // Now write the data itself
+    s << (const char*)data;
+    return s;
+}
+

xpcom/io/nsFileSpecStreaming.cpp

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+#include "nsFileSpecStreaming.h"
+
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+#include "nsFileStream.h"
+#include "nsFileSpec.h"
+
+#define MAX_PERSISTENT_DATA_SIZE 1000
+
+//----------------------------------------------------------------------------------------
+nsOutputStream& operator << (nsOutputStream& s, const nsFileURL& url)
+//----------------------------------------------------------------------------------------
+{
+    return s << url.GetURLString();
+}
+
+//----------------------------------------------------------------------------------------
+nsresult ReadDescriptor(
+    nsIInputStream* aStream,
+    nsPersistentFileDescriptor& desc)
+//----------------------------------------------------------------------------------------
+{
+    nsInputStream inputStream(aStream);
+    inputStream >> desc;
+    return NS_OK;
+}
+
+//----------------------------------------------------------------------------------------
+nsresult WriteDescriptor(
+    nsIOutputStream* aStream,
+    const nsPersistentFileDescriptor& desc)
+//----------------------------------------------------------------------------------------
+{
+    nsOutputStream outputStream(aStream);
+    outputStream << desc;
+    return NS_OK;
+}
+
+//----------------------------------------------------------------------------------------
+nsInputStream& operator >> (nsInputStream& s, nsPersistentFileDescriptor& d)
+// reads the data from a file
+//----------------------------------------------------------------------------------------
+{
+    char bigBuffer[MAX_PERSISTENT_DATA_SIZE + 1];
+    // The first 8 bytes of the data should be a hex version of the data size to follow.
+    PRInt32 bytesRead = 8;
+    bytesRead = s.read(bigBuffer, bytesRead);
+    if (bytesRead != 8)
+        return s;
+    bigBuffer[8] = '\0';
+    sscanf(bigBuffer, "%x", (PRUint32*)&bytesRead);
+    if (bytesRead > MAX_PERSISTENT_DATA_SIZE)
+    {
+        // Try to tolerate encoded values with no length header
+        bytesRead = 8 + s.read(bigBuffer + 8, MAX_PERSISTENT_DATA_SIZE - 8);
+    }
+    else
+    {
+        // Now we know how many bytes to read, do it.
+        bytesRead = s.read(bigBuffer, bytesRead);
+    }
+    d.SetData(bigBuffer, bytesRead);
+    return s;
+}
+
+//----------------------------------------------------------------------------------------
+nsOutputStream& operator << (nsOutputStream& s, const nsPersistentFileDescriptor& d)
+// writes the data to a file
+//----------------------------------------------------------------------------------------
+{
+    char littleBuf[9];
+    PRInt32 dataSize;
+    nsSimpleCharString data;
+    d.GetData(data, dataSize);
+    // First write (in hex) the length of the data to follow.  Exactly 8 bytes
+    sprintf(littleBuf, "%0.8x", dataSize);
+    s << littleBuf;
+    // Now write the data itself
+    s << (const char*)data;
+    return s;
+}
+

xpcom/io/nsFileSpecStreaming.h

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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+//    Functions for nsPersistentFileDescriptor that depend on streams, and so
+//    cannot be made independent of base.
+
+#include "nscore.h"
+#include "nsError.h"
+
+class nsPersistentFileDescriptor;
+class nsInputStream;
+class nsOutputStream;
+class nsIInputStream;
+class nsIOutputStream;
+class nsFileURL;
+class nsFileSpec;
+
+NS_BASE nsOutputStream& operator << (nsOutputStream& s, const nsFileURL& spec);
+NS_BASE nsresult ReadDescriptor(
+	nsIInputStream* aStream, nsPersistentFileDescriptor&);
+NS_BASE nsresult WriteDescriptor(
+	nsIOutputStream* aStream,
+	const nsPersistentFileDescriptor&);
+        // writes the data to a file
+NS_BASE nsInputStream& operator >> (
+    nsInputStream&,
+    nsPersistentFileDescriptor&);
+        // reads the data from a file
+NS_BASE nsOutputStream& operator << (
+    nsOutputStream&,
+    const nsPersistentFileDescriptor&);
+    	// writes the data to a file