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TarUtils (Apache Ant API)
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org.apache.tools.tar
 
Class TarUtils</H2>
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java.lang.Object
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<DT><PRE>public class TarUtils<DT>extends java.lang.Object</DL>
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This class provides static utility methods to work with byte streams.

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<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#TarUtils()">TarUtils</A>()</CODE>

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<CODE>static&nbsp;long</CODE></TD>
<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#computeCheckSum(byte[])">computeCheckSum</A>(byte[]&nbsp;buf)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compute the checksum of a tar entry header.</TD>
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<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#getCheckSumOctalBytes(long, byte[], int, int)">getCheckSumOctalBytes</A>(long&nbsp;value,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parse the checksum octal integer from a header buffer.</TD>
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<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#getLongOctalBytes(long, byte[], int, int)">getLongOctalBytes</A>(long&nbsp;value,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parse an octal long integer from a header buffer.</TD>
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<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#getNameBytes(java.lang.StringBuffer, byte[], int, int)">getNameBytes</A>(java.lang.StringBuffer&nbsp;name,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Determine the number of bytes in an entry name.</TD>
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<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#getOctalBytes(long, byte[], int, int)">getOctalBytes</A>(long&nbsp;value,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parse an octal integer from a header buffer.</TD>
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<CODE>static&nbsp;java.lang.StringBuffer</CODE></TD>
<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#parseName(byte[], int, int)">parseName</A>(byte[]&nbsp;header,
 int&nbsp;offset,
 int&nbsp;length)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parse an entry name from a header buffer.</TD>
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<CODE>static&nbsp;long</CODE></TD>
<TD><CODE><A HREF="../../../../org/apache/tools/tar/TarUtils.html#parseOctal(byte[], int, int)">parseOctal</A>(byte[]&nbsp;header,
 int&nbsp;offset,
 int&nbsp;length)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parse an octal string from a header buffer.</TD>
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<A NAME="TarUtils()"></A><H3>
TarUtils</H3>
<PRE>
public TarUtils()</PRE>
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<A NAME="parseOctal(byte[], int, int)"></A><H3>
parseOctal</H3>
<PRE>
public static long parseOctal(byte[]&nbsp;header,
 int&nbsp;offset,
 int&nbsp;length)</PRE>
<DL>
<DD>Parse an octal string from a header buffer. This is used for the
 file permission mode value.

<DD><DL>
<DT>Parameters:<DD><CODE>header</CODE> - The header buffer from which to parse.<DD><CODE>offset</CODE> - The offset into the buffer from which to parse.<DD><CODE>length</CODE> - The number of header bytes to parse.
<DT>Returns:<DD>The long value of the octal string.</DL>
</DD>
</DL>
<HR>

<A NAME="parseName(byte[], int, int)"></A><H3>
parseName</H3>
<PRE>
public static java.lang.StringBuffer parseName(byte[]&nbsp;header,
 int&nbsp;offset,
 int&nbsp;length)</PRE>
<DL>
<DD>Parse an entry name from a header buffer.

<DD><DL>
<DT>Parameters:<DD><CODE>header</CODE> - The header buffer from which to parse.<DD><CODE>offset</CODE> - The offset into the buffer from which to parse.<DD><CODE>length</CODE> - The number of header bytes to parse.
<DT>Returns:<DD>The header's entry name.</DL>
</DD>
</DL>
<HR>

<A NAME="getNameBytes(java.lang.StringBuffer, byte[], int, int)"></A><H3>
getNameBytes</H3>
<PRE>
public static int getNameBytes(java.lang.StringBuffer&nbsp;name,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</PRE>
<DL>
<DD>Determine the number of bytes in an entry name.

<DD><DL>
<DT>Parameters:<DD><CODE>name</CODE> - The header name from which to parse.<DD><CODE>buf</CODE> - The buffer from which to parse.<DD><CODE>offset</CODE> - The offset into the buffer from which to parse.<DD><CODE>length</CODE> - The number of header bytes to parse.
<DT>Returns:<DD>The number of bytes in a header's entry name.</DL>
</DD>
</DL>
<HR>

<A NAME="getOctalBytes(long, byte[], int, int)"></A><H3>
getOctalBytes</H3>
<PRE>
public static int getOctalBytes(long&nbsp;value,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</PRE>
<DL>
<DD>Parse an octal integer from a header buffer.

<DD><DL>
<DT>Parameters:<DD><CODE>value</CODE> - The header value<DD><CODE>buf</CODE> - The buffer from which to parse.<DD><CODE>offset</CODE> - The offset into the buffer from which to parse.<DD><CODE>length</CODE> - The number of header bytes to parse.
<DT>Returns:<DD>The integer value of the octal bytes.</DL>
</DD>
</DL>
<HR>

<A NAME="getLongOctalBytes(long, byte[], int, int)"></A><H3>
getLongOctalBytes</H3>
<PRE>
public static int getLongOctalBytes(long&nbsp;value,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</PRE>
<DL>
<DD>Parse an octal long integer from a header buffer.

<DD><DL>
<DT>Parameters:<DD><CODE>value</CODE> - The header value<DD><CODE>buf</CODE> - The buffer from which to parse.<DD><CODE>offset</CODE> - The offset into the buffer from which to parse.<DD><CODE>length</CODE> - The number of header bytes to parse.
<DT>Returns:<DD>The long value of the octal bytes.</DL>
</DD>
</DL>
<HR>

<A NAME="getCheckSumOctalBytes(long, byte[], int, int)"></A><H3>
getCheckSumOctalBytes</H3>
<PRE>
public static int getCheckSumOctalBytes(long&nbsp;value,
 byte[]&nbsp;buf,
 int&nbsp;offset,
 int&nbsp;length)</PRE>
<DL>
<DD>Parse the checksum octal integer from a header buffer.

<DD><DL>
<DT>Parameters:<DD><CODE>value</CODE> - The header value<DD><CODE>buf</CODE> - The buffer from which to parse.<DD><CODE>offset</CODE> - The offset into the buffer from which to parse.<DD><CODE>length</CODE> - The number of header bytes to parse.
<DT>Returns:<DD>The integer value of the entry's checksum.</DL>
</DD>
</DL>
<HR>

<A NAME="computeCheckSum(byte[])"></A><H3>
computeCheckSum</H3>
<PRE>
public static long computeCheckSum(byte[]&nbsp;buf)</PRE>
<DL>
<DD>Compute the checksum of a tar entry header.

<DD><DL>
<DT>Parameters:<DD><CODE>buf</CODE> - The tar entry's header buffer.
<DT>Returns:<DD>The computed checksum.</DL>
</DD>
</DL>

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