org.apache.tools.tar
Class TarUtils
java.lang.Object
org.apache.tools.tar.TarUtils
public class TarUtils
extends java.lang.Object
This class provides static utility methods to work with byte streams.
static long | computeCheckSum(byte[] buf) - Compute the checksum of a tar entry header.
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static int | getCheckSumOctalBytes(long value, byte[] buf, int offset, int length) - Parse the checksum octal integer from a header buffer.
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static int | getLongOctalBytes(long value, byte[] buf, int offset, int length) - Parse an octal long integer from a header buffer.
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static int | getNameBytes(StringBuffer name, byte[] buf, int offset, int length) - Determine the number of bytes in an entry name.
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static int | getOctalBytes(long value, byte[] buf, int offset, int length) - Parse an octal integer from a header buffer.
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static StringBuffer | parseName(byte[] header, int offset, int length) - Parse an entry name from a header buffer.
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static long | parseOctal(byte[] header, int offset, int length) - Parse an octal string from a header buffer.
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computeCheckSum
public static long computeCheckSum(byte[] buf)
Compute the checksum of a tar entry header.
buf
- The tar entry's header buffer.
getCheckSumOctalBytes
public static int getCheckSumOctalBytes(long value,
byte[] buf,
int offset,
int length)
Parse the checksum octal integer from a header buffer.
value
- The header valueoffset
- The offset into the buffer from which to parse.length
- The number of header bytes to parse.
- The integer value of the entry's checksum.
getLongOctalBytes
public static int getLongOctalBytes(long value,
byte[] buf,
int offset,
int length)
Parse an octal long integer from a header buffer.
value
- The header valueoffset
- The offset into the buffer from which to parse.length
- The number of header bytes to parse.
- The long value of the octal bytes.
getNameBytes
public static int getNameBytes(StringBuffer name,
byte[] buf,
int offset,
int length)
Determine the number of bytes in an entry name.
name
- The header name from which to parse.offset
- The offset into the buffer from which to parse.length
- The number of header bytes to parse.
- The number of bytes in a header's entry name.
getOctalBytes
public static int getOctalBytes(long value,
byte[] buf,
int offset,
int length)
Parse an octal integer from a header buffer.
value
- The header valueoffset
- The offset into the buffer from which to parse.length
- The number of header bytes to parse.
- The integer value of the octal bytes.
parseName
public static StringBuffer parseName(byte[] header,
int offset,
int length)
Parse an entry name from a header buffer.
header
- The header buffer from which to parse.offset
- The offset into the buffer from which to parse.length
- The number of header bytes to parse.
parseOctal
public static long parseOctal(byte[] header,
int offset,
int length)
Parse an octal string from a header buffer. This is used for the
file permission mode value.
header
- The header buffer from which to parse.offset
- The offset into the buffer from which to parse.length
- The number of header bytes to parse.
- The long value of the octal string.
Copyright B) 2000-2006 Apache Software Foundation. All Rights Reserved.