com.runehive.fs.util.CompressionUtil Class Reference

A static-utility class containing containing extension or helper methods for compressor-deccompressor's. More...

Static Public Member Functions
static byte[]	gunzip (byte[] data) throws IOException
	Uncompresses a byte array of g-zipped data.
static byte[]	unbzip2 (byte[] data) throws IOException
	Uncompresses a byte array of b-zipped data.
static byte[]	unbzip2Headerless (byte[] data, int offset, int length) throws IOException
	Uncompresses a byte array of b-zipped data that does not contain a header.

Private Member Functions
	CompressionUtil ()
	Suppresses the default-public constructor preventing this class from being instantiated by other classes.

Detailed Description

A static-utility class containing containing extension or helper methods for compressor-deccompressor's.

Author

Ryley Kimmel ryley.nosp@m..kim.nosp@m.mel@l.nosp@m.ive..nosp@m.com

Definition at line 17 of file CompressionUtil.java.

Constructor & Destructor Documentation

CompressionUtil()

com.runehive.fs.util.CompressionUtil.CompressionUtil ( )

private

Suppresses the default-public constructor preventing this class from being instantiated by other classes.

Exceptions

UnsupportedOperationException

If this class is instantiated within itself.

Definition at line 71 of file CompressionUtil.java.

                              {
        throw new UnsupportedOperationException("static-utility classes may not be instantiated.");
    }

Member Function Documentation

gunzip()

byte[] com.runehive.fs.util.CompressionUtil.gunzip ( byte[] data ) throws IOException

static

Uncompresses a byte array of g-zipped data.

Parameters

data	The compressed, g-zipped data.

Returns

The uncompressed data.

Exceptions

IOException

If some I/O exception occurs.

Definition at line 25 of file CompressionUtil.java.

                                                                {
        return toByteArray(new GZIPInputStream(new ByteArrayInputStream(data)));
    }

Referenced by com.runehive.fs.cache.decoder.RegionDecoder.load().

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unbzip2()

byte[] com.runehive.fs.util.CompressionUtil.unbzip2 ( byte[] data ) throws IOException

static

Uncompresses a byte array of b-zipped data.

Parameters

data	The compressed, b-zipped data.

Returns

The uncompressed data.

Exceptions

IOException

If some I/O exception occurs.

Definition at line 61 of file CompressionUtil.java.

                                                                 {
        return toByteArray(new CBZip2InputStream(new ByteArrayInputStream(data)));
    }

Referenced by unbzip2Headerless().

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unbzip2Headerless()

byte[] com.runehive.fs.util.CompressionUtil.unbzip2Headerless ( byte[] data, int offset, int length ) throws IOException

static

Uncompresses a byte array of b-zipped data that does not contain a header.

A b-zip header block consists of 2 bytes, they are replaced with 'h' and '1' as that is what our file system compresses the header as.

Parameters

data	The compressed, b-zipped data.
offset	The offset position of the data.
length	The length of the data.

Returns

The uncompressed data.

Exceptions

IOException

If some I/O exception occurs.

Definition at line 44 of file CompressionUtil.java.

                                                                                                   {
        /* Strip the header from the data. */
        byte[] bzip2 = new byte[length + 2];
        bzip2[0] = 'h';
        bzip2[1] = '1';
        System.arraycopy(data, offset, bzip2, 2, length);
 
        /* Uncompress the headerless data */
        return unbzip2(bzip2);
    }

References unbzip2().

Referenced by com.runehive.fs.cache.archive.Archive.decode().

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The documentation for this class was generated from the following file:

• java/com/runehive/fs/util/CompressionUtil.java