RetroZilla/xpcom/tests/TestStorageStream.cpp

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2015-10-21 05:03:22 +02:00
/* ***** 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.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by IBM Corporation are Copyright (C) 2004
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* 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 <stdlib.h>
#include "nsIStorageStream.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "nsCOMPtr.h"
int main()
{
char kData[4096];
memset(kData, 0, sizeof(kData));
nsresult rv;
nsCOMPtr<nsIStorageStream> stor;
rv = NS_NewStorageStream(4096, PR_UINT32_MAX, getter_AddRefs(stor));
if (NS_FAILED(rv))
return -1;
nsCOMPtr<nsIOutputStream> out;
rv = stor->GetOutputStream(0, getter_AddRefs(out));
if (NS_FAILED(rv))
return -1;
PRUint32 n;
rv = out->Write(kData, sizeof(kData), &n);
if (NS_FAILED(rv))
return -1;
rv = out->Write(kData, sizeof(kData), &n);
if (NS_FAILED(rv))
return -1;
rv = out->Close();
if (NS_FAILED(rv))
return -1;
out = nsnull;
nsCOMPtr<nsIInputStream> in;
rv = stor->NewInputStream(0, getter_AddRefs(in));
if (NS_FAILED(rv))
return -1;
char buf[4096];
// consume contents of input stream
do {
rv = in->Read(buf, sizeof(buf), &n);
if (NS_FAILED(rv))
return -1;
} while (n != 0);
rv = in->Close();
if (NS_FAILED(rv))
return -1;
in = nsnull;
// now, write 3 more full 4k segments + 11 bytes, starting at 8192
// total written equals 20491 bytes
rv = stor->GetOutputStream(8192, getter_AddRefs(out));
if (NS_FAILED(rv))
return -1;
rv = out->Write(kData, sizeof(kData), &n);
if (NS_FAILED(rv))
return -1;
rv = out->Write(kData, sizeof(kData), &n);
if (NS_FAILED(rv))
return -1;
rv = out->Write(kData, sizeof(kData), &n);
if (NS_FAILED(rv))
return -1;
rv = out->Write(kData, 11, &n);
if (NS_FAILED(rv))
return -1;
rv = out->Close();
if (NS_FAILED(rv))
return -1;
out = nsnull;
// now, read all
rv = stor->NewInputStream(0, getter_AddRefs(in));
if (NS_FAILED(rv))
return -1;
// consume contents of input stream
do {
rv = in->Read(buf, sizeof(buf), &n);
if (NS_FAILED(rv))
return -1;
} while (n != 0);
rv = in->Close();
if (NS_FAILED(rv))
return -1;
in = nsnull;
return 0;
}