← Back to branch summary

~ubuntu-branches/ubuntu/utopic/gpsprune/utopic

« back to all changes in this revision

Viewing changes to tim/prune/load/ByteScooper.java

  • Committer: Bazaar Package Importer
  • Author(s): David Paleino
  • Date: 2011-10-20 21:54:34 UTC
  • mfrom: (1.1.5 upstream)
  • Revision ID: james.westby@ubuntu.com-20111020215434-fqphir79ryum5mea
Tags: 13.1-1
http://bugs.debian.org/598983
http://bugs.debian.org/639502
* New upstream version
  + now defaults looking in ~ for the configuration (Closes: #598983)
  + added OpenSeaMap to background images (Closes: #639502)
* Upstream author renamed it gpsprune, fix various files
* Fix Main-Class in debian/manifest

Show diffs side-by-side

added added

removed removed

Lines of Context:
tim/prune/load/ByteScooper.java
 
1
package tim.prune.load;
 
2
 
 
3
import java.io.IOException;
 
4
import java.io.InputStream;
 
5
 
 
6
/**
 
7
 * Class to scoop bytes from an input stream into an array.
 
8
 * The size of the array doesn't have to be known in advance.
 
9
 * This is used for getting images and sound files out of zip
 
10
 * files or from remote URLs.
 
11
 */
 
12
public class ByteScooper
 
13
{
 
14
        /** Bucket size in bytes */
 
15
        private static final int BUCKET_SIZE = 5000;
 
16
        /** Amount by which barrel size is increased on demand */
 
17
        private static final int BARREL_SIZE_INCREMENT = 100000;
 
18
 
 
19
        /**
 
20
         * Scoop bytes from the given input stream and return the result
 
21
         * @param inIs input stream to scoop bytes from
 
22
         * @return byte array
 
23
         */
 
24
        public static byte[] scoop(InputStream inIs) throws IOException
 
25
        {
 
26
                byte[] _barrel = new byte[BARREL_SIZE_INCREMENT];
 
27
                byte[] _bucket = new byte[BUCKET_SIZE];
 
28
                int numBytesInBarrel = 0;
 
29
                // read from stream into the bucket
 
30
                int numBytesRead = inIs.read(_bucket);
 
31
                while (numBytesRead >= 0)
 
32
                {
 
33
                        // expand barrel if necessary
 
34
                        if ((numBytesInBarrel + numBytesRead) > _barrel.length)
 
35
                        {
 
36
                                byte[] newBarrel = new byte[_barrel.length + BARREL_SIZE_INCREMENT];
 
37
                                System.arraycopy(_barrel, 0, newBarrel, 0, numBytesInBarrel);
 
38
                                _barrel = newBarrel;
 
39
                        }
 
40
                        // copy from bucket into barrel
 
41
                        System.arraycopy(_bucket, 0, _barrel, numBytesInBarrel, numBytesRead);
 
42
                        numBytesInBarrel += numBytesRead;
 
43
                        // read next lot from stream into the bucket
 
44
                        numBytesRead = inIs.read(_bucket);
 
45
                }
 
46
                // Now we know how many bytes there are, so crop to size
 
47
                if (numBytesInBarrel == 0) return null;
 
48
                byte[] result = new byte[numBytesInBarrel];
 
49
                System.arraycopy(_barrel, 0, result, 0, numBytesInBarrel);
 
50
                return result;
 
51
        }
 
52
}