cloudstack-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From borisroman <...@git.apache.org>
Subject [GitHub] cloudstack pull request: CLOUDSTACK-8819: Added QCOW2 virtual size...
Date Thu, 10 Sep 2015 14:46:40 GMT
Github user borisroman commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/795#discussion_r39168298
  
    --- Diff: utils/src/main/java/com/cloud/utils/storage/QCOW2Utils.java ---
    @@ -0,0 +1,60 @@
    +//
    +// Licensed to the Apache Software Foundation (ASF) under one
    +// or more contributor license agreements.  See the NOTICE file
    +// distributed with this work for additional information
    +// regarding copyright ownership.  The ASF licenses this file
    +// to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
    +//
    +// Unless required by applicable law or agreed to in writing,
    +// software distributed under the License is distributed on an
    +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    +// KIND, either express or implied.  See the License for the
    +// specific language governing permissions and limitations
    +// under the License.
    +//
    +
    +package com.cloud.utils.storage;
    +
    +import java.io.IOException;
    +import java.io.InputStream;
    +
    +import com.cloud.utils.NumbersUtil;
    +
    +public final class QCOW2Utils {
    +    private static final int VIRTUALSIZE_HEADER_LOCATION = 24;
    +    private static final int VIRTUALSIZE_HEADER_LENGTH = 8;
    +
    +    /**
    +     * Private constructor ->  This utility class cannot be instantiated.
    +     */
    +    private QCOW2Utils() {}
    +
    +    /**
    +     * @return the header location of the virtual size field.
    +     */
    +    public static int getVirtualSizeHeaderLocation() {
    +        return VIRTUALSIZE_HEADER_LOCATION;
    +    }
    +
    +    /**
    +     * @param inputStream The QCOW2 object in stream format.
    +     * @return The virtual size of the QCOW2 object.
    +     */
    +    public static long getVirtualSize(InputStream inputStream) throws IOException {
    +        byte[] b = new byte[8];
    +
    +        if (inputStream.skip(VIRTUALSIZE_HEADER_LOCATION) != VIRTUALSIZE_HEADER_LOCATION)
{
    +            throw new IOException("Unable to skip to the virtual size header");
    +        }
    +
    +        if (inputStream.read(b) != 8) {
    --- End diff --
    
    True that.


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.
---

Mime
View raw message