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Posted to commits@commons.apache.org by bo...@apache.org on 2013/03/14 18:11:35 UTC
svn commit: r854484 [10/43] - in
/websites/production/commons/content/proper/commons-compress: ./ apidocs/
apidocs/org/apache/commons/compress/archivers/
apidocs/org/apache/commons/compress/archivers/ar/
apidocs/org/apache/commons/compress/archivers/ar...
Modified: websites/production/commons/content/proper/commons-compress/apidocs/src-html/org/apache/commons/compress/archivers/zip/X7875_NewUnix.html
==============================================================================
--- websites/production/commons/content/proper/commons-compress/apidocs/src-html/org/apache/commons/compress/archivers/zip/X7875_NewUnix.html (original)
+++ websites/production/commons/content/proper/commons-compress/apidocs/src-html/org/apache/commons/compress/archivers/zip/X7875_NewUnix.html Thu Mar 14 17:10:39 2013
@@ -50,299 +50,300 @@
<span class="sourceLineNo">042</span> * GIDSize 1 byte Size of GID field<a name="line.42"></a>
<span class="sourceLineNo">043</span> * GID Variable GID for this entry (little endian)<a name="line.43"></a>
<span class="sourceLineNo">044</span> * </pre><a name="line.44"></a>
-<span class="sourceLineNo">045</span> */<a name="line.45"></a>
-<span class="sourceLineNo">046</span>public class X7875_NewUnix implements ZipExtraField, Cloneable, Serializable {<a name="line.46"></a>
-<span class="sourceLineNo">047</span> private static final ZipShort HEADER_ID = new ZipShort(0x7875);<a name="line.47"></a>
-<span class="sourceLineNo">048</span> private static final BigInteger ONE_THOUSAND = BigInteger.valueOf(1000);<a name="line.48"></a>
-<span class="sourceLineNo">049</span> private static final long serialVersionUID = 1L;<a name="line.49"></a>
-<span class="sourceLineNo">050</span><a name="line.50"></a>
-<span class="sourceLineNo">051</span> private int version = 1; // always '1' according to current info-zip spec.<a name="line.51"></a>
-<span class="sourceLineNo">052</span><a name="line.52"></a>
-<span class="sourceLineNo">053</span> // BigInteger helps us with little-endian / big-endian conversions.<a name="line.53"></a>
-<span class="sourceLineNo">054</span> // (thanks to BigInteger.toByteArray() and a reverse() method we created).<a name="line.54"></a>
-<span class="sourceLineNo">055</span> // Also, the spec theoretically allows UID/GID up to 255 bytes long!<a name="line.55"></a>
-<span class="sourceLineNo">056</span> //<a name="line.56"></a>
-<span class="sourceLineNo">057</span> // NOTE: equals() and hashCode() currently assume these can never be null.<a name="line.57"></a>
-<span class="sourceLineNo">058</span> private BigInteger uid;<a name="line.58"></a>
-<span class="sourceLineNo">059</span> private BigInteger gid;<a name="line.59"></a>
-<span class="sourceLineNo">060</span><a name="line.60"></a>
-<span class="sourceLineNo">061</span> /**<a name="line.61"></a>
-<span class="sourceLineNo">062</span> * Constructor for X7875_NewUnix.<a name="line.62"></a>
-<span class="sourceLineNo">063</span> */<a name="line.63"></a>
-<span class="sourceLineNo">064</span> public X7875_NewUnix() {<a name="line.64"></a>
-<span class="sourceLineNo">065</span> reset();<a name="line.65"></a>
-<span class="sourceLineNo">066</span> }<a name="line.66"></a>
-<span class="sourceLineNo">067</span><a name="line.67"></a>
-<span class="sourceLineNo">068</span> /**<a name="line.68"></a>
-<span class="sourceLineNo">069</span> * The Header-ID.<a name="line.69"></a>
-<span class="sourceLineNo">070</span> *<a name="line.70"></a>
-<span class="sourceLineNo">071</span> * @return the value for the header id for this extrafield<a name="line.71"></a>
-<span class="sourceLineNo">072</span> */<a name="line.72"></a>
-<span class="sourceLineNo">073</span> public ZipShort getHeaderId() {<a name="line.73"></a>
-<span class="sourceLineNo">074</span> return HEADER_ID;<a name="line.74"></a>
-<span class="sourceLineNo">075</span> }<a name="line.75"></a>
-<span class="sourceLineNo">076</span><a name="line.76"></a>
-<span class="sourceLineNo">077</span> /**<a name="line.77"></a>
-<span class="sourceLineNo">078</span> * Gets the UID as a long. UID is typically a 32 bit unsigned<a name="line.78"></a>
-<span class="sourceLineNo">079</span> * value on most UNIX systems, so we return a long to avoid<a name="line.79"></a>
-<span class="sourceLineNo">080</span> * integer overflow into the negatives in case values above<a name="line.80"></a>
-<span class="sourceLineNo">081</span> * and including 2^31 are being used.<a name="line.81"></a>
-<span class="sourceLineNo">082</span> *<a name="line.82"></a>
-<span class="sourceLineNo">083</span> * @return the UID value.<a name="line.83"></a>
-<span class="sourceLineNo">084</span> */<a name="line.84"></a>
-<span class="sourceLineNo">085</span> public long getUID() { return ZipUtil.bigToLong(uid); }<a name="line.85"></a>
-<span class="sourceLineNo">086</span><a name="line.86"></a>
-<span class="sourceLineNo">087</span> /**<a name="line.87"></a>
-<span class="sourceLineNo">088</span> * Gets the GID as a long. GID is typically a 32 bit unsigned<a name="line.88"></a>
-<span class="sourceLineNo">089</span> * value on most UNIX systems, so we return a long to avoid<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * integer overflow into the negatives in case values above<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * and including 2^31 are being used.<a name="line.91"></a>
-<span class="sourceLineNo">092</span> *<a name="line.92"></a>
-<span class="sourceLineNo">093</span> * @return the GID value.<a name="line.93"></a>
-<span class="sourceLineNo">094</span> */<a name="line.94"></a>
-<span class="sourceLineNo">095</span> public long getGID() { return ZipUtil.bigToLong(gid); }<a name="line.95"></a>
-<span class="sourceLineNo">096</span><a name="line.96"></a>
-<span class="sourceLineNo">097</span> /**<a name="line.97"></a>
-<span class="sourceLineNo">098</span> * Sets the UID.<a name="line.98"></a>
-<span class="sourceLineNo">099</span> *<a name="line.99"></a>
-<span class="sourceLineNo">100</span> * @param l UID value to set on this extra field.<a name="line.100"></a>
-<span class="sourceLineNo">101</span> */<a name="line.101"></a>
-<span class="sourceLineNo">102</span> public void setUID(long l) {<a name="line.102"></a>
-<span class="sourceLineNo">103</span> this.uid = ZipUtil.longToBig(l);<a name="line.103"></a>
-<span class="sourceLineNo">104</span> }<a name="line.104"></a>
-<span class="sourceLineNo">105</span><a name="line.105"></a>
-<span class="sourceLineNo">106</span> /**<a name="line.106"></a>
-<span class="sourceLineNo">107</span> * Sets the GID.<a name="line.107"></a>
-<span class="sourceLineNo">108</span> *<a name="line.108"></a>
-<span class="sourceLineNo">109</span> * @param l GID value to set on this extra field.<a name="line.109"></a>
-<span class="sourceLineNo">110</span> */<a name="line.110"></a>
-<span class="sourceLineNo">111</span> public void setGID(long l) {<a name="line.111"></a>
-<span class="sourceLineNo">112</span> this.gid = ZipUtil.longToBig(l);<a name="line.112"></a>
-<span class="sourceLineNo">113</span> }<a name="line.113"></a>
-<span class="sourceLineNo">114</span><a name="line.114"></a>
-<span class="sourceLineNo">115</span> /**<a name="line.115"></a>
-<span class="sourceLineNo">116</span> * Length of the extra field in the local file data - without<a name="line.116"></a>
-<span class="sourceLineNo">117</span> * Header-ID or length specifier.<a name="line.117"></a>
-<span class="sourceLineNo">118</span> *<a name="line.118"></a>
-<span class="sourceLineNo">119</span> * @return a <code>ZipShort</code> for the length of the data of this extra field<a name="line.119"></a>
-<span class="sourceLineNo">120</span> */<a name="line.120"></a>
-<span class="sourceLineNo">121</span> public ZipShort getLocalFileDataLength() {<a name="line.121"></a>
-<span class="sourceLineNo">122</span> int uidSize = trimLeadingZeroesForceMinLength(uid.toByteArray()).length;<a name="line.122"></a>
-<span class="sourceLineNo">123</span> int gidSize = trimLeadingZeroesForceMinLength(gid.toByteArray()).length;<a name="line.123"></a>
-<span class="sourceLineNo">124</span><a name="line.124"></a>
-<span class="sourceLineNo">125</span> // The 3 comes from: version=1 + uidsize=1 + gidsize=1<a name="line.125"></a>
-<span class="sourceLineNo">126</span> return new ZipShort(3 + uidSize + gidSize);<a name="line.126"></a>
-<span class="sourceLineNo">127</span> }<a name="line.127"></a>
-<span class="sourceLineNo">128</span><a name="line.128"></a>
-<span class="sourceLineNo">129</span> /**<a name="line.129"></a>
-<span class="sourceLineNo">130</span> * Length of the extra field in the central directory data - without<a name="line.130"></a>
-<span class="sourceLineNo">131</span> * Header-ID or length specifier.<a name="line.131"></a>
-<span class="sourceLineNo">132</span> *<a name="line.132"></a>
-<span class="sourceLineNo">133</span> * @return a <code>ZipShort</code> for the length of the data of this extra field<a name="line.133"></a>
-<span class="sourceLineNo">134</span> */<a name="line.134"></a>
-<span class="sourceLineNo">135</span> public ZipShort getCentralDirectoryLength() {<a name="line.135"></a>
-<span class="sourceLineNo">136</span> return getLocalFileDataLength(); // No different than local version.<a name="line.136"></a>
-<span class="sourceLineNo">137</span> }<a name="line.137"></a>
-<span class="sourceLineNo">138</span><a name="line.138"></a>
-<span class="sourceLineNo">139</span> /**<a name="line.139"></a>
-<span class="sourceLineNo">140</span> * The actual data to put into local file data - without Header-ID<a name="line.140"></a>
-<span class="sourceLineNo">141</span> * or length specifier.<a name="line.141"></a>
-<span class="sourceLineNo">142</span> *<a name="line.142"></a>
-<span class="sourceLineNo">143</span> * @return get the data<a name="line.143"></a>
-<span class="sourceLineNo">144</span> */<a name="line.144"></a>
-<span class="sourceLineNo">145</span> public byte[] getLocalFileDataData() {<a name="line.145"></a>
-<span class="sourceLineNo">146</span> byte[] uidBytes = uid.toByteArray();<a name="line.146"></a>
-<span class="sourceLineNo">147</span> byte[] gidBytes = gid.toByteArray();<a name="line.147"></a>
-<span class="sourceLineNo">148</span><a name="line.148"></a>
-<span class="sourceLineNo">149</span> // BigInteger might prepend a leading-zero to force a positive representation<a name="line.149"></a>
-<span class="sourceLineNo">150</span> // (e.g., so that the sign-bit is set to zero). We need to remove that<a name="line.150"></a>
-<span class="sourceLineNo">151</span> // before sending the number over the wire.<a name="line.151"></a>
-<span class="sourceLineNo">152</span> uidBytes = trimLeadingZeroesForceMinLength(uidBytes);<a name="line.152"></a>
-<span class="sourceLineNo">153</span> gidBytes = trimLeadingZeroesForceMinLength(gidBytes);<a name="line.153"></a>
-<span class="sourceLineNo">154</span><a name="line.154"></a>
-<span class="sourceLineNo">155</span> // Couldn't bring myself to just call getLocalFileDataLength() when we've<a name="line.155"></a>
-<span class="sourceLineNo">156</span> // already got the arrays right here. Yeah, yeah, I know, premature<a name="line.156"></a>
-<span class="sourceLineNo">157</span> // optimization is the root of all...<a name="line.157"></a>
-<span class="sourceLineNo">158</span> //<a name="line.158"></a>
-<span class="sourceLineNo">159</span> // The 3 comes from: version=1 + uidsize=1 + gidsize=1<a name="line.159"></a>
-<span class="sourceLineNo">160</span> byte[] data = new byte[3 + uidBytes.length + gidBytes.length];<a name="line.160"></a>
-<span class="sourceLineNo">161</span><a name="line.161"></a>
-<span class="sourceLineNo">162</span> // reverse() switches byte array from big-endian to little-endian.<a name="line.162"></a>
-<span class="sourceLineNo">163</span> reverse(uidBytes);<a name="line.163"></a>
-<span class="sourceLineNo">164</span> reverse(gidBytes);<a name="line.164"></a>
-<span class="sourceLineNo">165</span><a name="line.165"></a>
-<span class="sourceLineNo">166</span> int pos = 0;<a name="line.166"></a>
-<span class="sourceLineNo">167</span> data[pos++] = unsignedIntToSignedByte(version);<a name="line.167"></a>
-<span class="sourceLineNo">168</span> data[pos++] = unsignedIntToSignedByte(uidBytes.length);<a name="line.168"></a>
-<span class="sourceLineNo">169</span> System.arraycopy(uidBytes, 0, data, pos, uidBytes.length);<a name="line.169"></a>
-<span class="sourceLineNo">170</span> pos += uidBytes.length;<a name="line.170"></a>
-<span class="sourceLineNo">171</span> data[pos++] = unsignedIntToSignedByte(gidBytes.length);<a name="line.171"></a>
-<span class="sourceLineNo">172</span> System.arraycopy(gidBytes, 0, data, pos, gidBytes.length);<a name="line.172"></a>
-<span class="sourceLineNo">173</span> return data;<a name="line.173"></a>
-<span class="sourceLineNo">174</span> }<a name="line.174"></a>
-<span class="sourceLineNo">175</span><a name="line.175"></a>
-<span class="sourceLineNo">176</span> /**<a name="line.176"></a>
-<span class="sourceLineNo">177</span> * The actual data to put into central directory data - without Header-ID<a name="line.177"></a>
-<span class="sourceLineNo">178</span> * or length specifier.<a name="line.178"></a>
-<span class="sourceLineNo">179</span> *<a name="line.179"></a>
-<span class="sourceLineNo">180</span> * @return get the data<a name="line.180"></a>
-<span class="sourceLineNo">181</span> */<a name="line.181"></a>
-<span class="sourceLineNo">182</span> public byte[] getCentralDirectoryData() {<a name="line.182"></a>
-<span class="sourceLineNo">183</span> return getLocalFileDataData();<a name="line.183"></a>
-<span class="sourceLineNo">184</span> }<a name="line.184"></a>
-<span class="sourceLineNo">185</span><a name="line.185"></a>
-<span class="sourceLineNo">186</span> /**<a name="line.186"></a>
-<span class="sourceLineNo">187</span> * Populate data from this array as if it was in local file data.<a name="line.187"></a>
-<span class="sourceLineNo">188</span> *<a name="line.188"></a>
-<span class="sourceLineNo">189</span> * @param data an array of bytes<a name="line.189"></a>
-<span class="sourceLineNo">190</span> * @param offset the start offset<a name="line.190"></a>
-<span class="sourceLineNo">191</span> * @param length the number of bytes in the array from offset<a name="line.191"></a>
-<span class="sourceLineNo">192</span> * @throws java.util.zip.ZipException on error<a name="line.192"></a>
-<span class="sourceLineNo">193</span> */<a name="line.193"></a>
-<span class="sourceLineNo">194</span> public void parseFromLocalFileData(<a name="line.194"></a>
-<span class="sourceLineNo">195</span> byte[] data, int offset, int length<a name="line.195"></a>
-<span class="sourceLineNo">196</span> ) throws ZipException {<a name="line.196"></a>
-<span class="sourceLineNo">197</span> reset();<a name="line.197"></a>
-<span class="sourceLineNo">198</span> this.version = signedByteToUnsignedInt(data[offset++]);<a name="line.198"></a>
-<span class="sourceLineNo">199</span> int uidSize = signedByteToUnsignedInt(data[offset++]);<a name="line.199"></a>
-<span class="sourceLineNo">200</span> byte[] uidBytes = new byte[uidSize];<a name="line.200"></a>
-<span class="sourceLineNo">201</span> System.arraycopy(data, offset, uidBytes, 0, uidSize);<a name="line.201"></a>
-<span class="sourceLineNo">202</span> offset += uidSize;<a name="line.202"></a>
-<span class="sourceLineNo">203</span> this.uid = new BigInteger(1, reverse(uidBytes)); // sign-bit forced positive<a name="line.203"></a>
-<span class="sourceLineNo">204</span><a name="line.204"></a>
-<span class="sourceLineNo">205</span> int gidSize = signedByteToUnsignedInt(data[offset++]);<a name="line.205"></a>
-<span class="sourceLineNo">206</span> byte[] gidBytes = new byte[gidSize];<a name="line.206"></a>
-<span class="sourceLineNo">207</span> System.arraycopy(data, offset, gidBytes, 0, gidSize);<a name="line.207"></a>
-<span class="sourceLineNo">208</span> this.gid = new BigInteger(1, reverse(gidBytes)); // sign-bit forced positive<a name="line.208"></a>
-<span class="sourceLineNo">209</span> }<a name="line.209"></a>
-<span class="sourceLineNo">210</span><a name="line.210"></a>
-<span class="sourceLineNo">211</span> /**<a name="line.211"></a>
-<span class="sourceLineNo">212</span> * Doesn't do anything special since this class always uses the<a name="line.212"></a>
-<span class="sourceLineNo">213</span> * same data in central directory and local file data.<a name="line.213"></a>
-<span class="sourceLineNo">214</span> */<a name="line.214"></a>
-<span class="sourceLineNo">215</span> public void parseFromCentralDirectoryData(<a name="line.215"></a>
-<span class="sourceLineNo">216</span> byte[] buffer, int offset, int length<a name="line.216"></a>
-<span class="sourceLineNo">217</span> ) throws ZipException {<a name="line.217"></a>
-<span class="sourceLineNo">218</span> reset();<a name="line.218"></a>
-<span class="sourceLineNo">219</span> parseFromLocalFileData(buffer, offset, length);<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span><a name="line.221"></a>
-<span class="sourceLineNo">222</span> /**<a name="line.222"></a>
-<span class="sourceLineNo">223</span> * Reset state back to newly constructed state. Helps us make sure<a name="line.223"></a>
-<span class="sourceLineNo">224</span> * parse() calls always generate clean results.<a name="line.224"></a>
-<span class="sourceLineNo">225</span> */<a name="line.225"></a>
-<span class="sourceLineNo">226</span> private void reset() {<a name="line.226"></a>
-<span class="sourceLineNo">227</span> // Typical UID/GID of the first non-root user created on a unix system.<a name="line.227"></a>
-<span class="sourceLineNo">228</span> uid = ONE_THOUSAND;<a name="line.228"></a>
-<span class="sourceLineNo">229</span> gid = ONE_THOUSAND;<a name="line.229"></a>
-<span class="sourceLineNo">230</span> }<a name="line.230"></a>
-<span class="sourceLineNo">231</span><a name="line.231"></a>
-<span class="sourceLineNo">232</span> /**<a name="line.232"></a>
-<span class="sourceLineNo">233</span> * Returns a String representation of this class useful for<a name="line.233"></a>
-<span class="sourceLineNo">234</span> * debugging purposes.<a name="line.234"></a>
-<span class="sourceLineNo">235</span> *<a name="line.235"></a>
-<span class="sourceLineNo">236</span> * @return A String representation of this class useful for<a name="line.236"></a>
-<span class="sourceLineNo">237</span> * debugging purposes.<a name="line.237"></a>
-<span class="sourceLineNo">238</span> */<a name="line.238"></a>
-<span class="sourceLineNo">239</span> @Override<a name="line.239"></a>
-<span class="sourceLineNo">240</span> public String toString() {<a name="line.240"></a>
-<span class="sourceLineNo">241</span> return "0x7875 Zip Extra Field: UID=" + uid + " GID=" + gid;<a name="line.241"></a>
-<span class="sourceLineNo">242</span> }<a name="line.242"></a>
-<span class="sourceLineNo">243</span><a name="line.243"></a>
-<span class="sourceLineNo">244</span> @Override<a name="line.244"></a>
-<span class="sourceLineNo">245</span> public Object clone() throws CloneNotSupportedException {<a name="line.245"></a>
-<span class="sourceLineNo">246</span> return super.clone();<a name="line.246"></a>
-<span class="sourceLineNo">247</span> }<a name="line.247"></a>
-<span class="sourceLineNo">248</span><a name="line.248"></a>
-<span class="sourceLineNo">249</span> @Override<a name="line.249"></a>
-<span class="sourceLineNo">250</span> public boolean equals(Object o) {<a name="line.250"></a>
-<span class="sourceLineNo">251</span> if (o instanceof X7875_NewUnix) {<a name="line.251"></a>
-<span class="sourceLineNo">252</span> X7875_NewUnix xf = (X7875_NewUnix) o;<a name="line.252"></a>
-<span class="sourceLineNo">253</span> // We assume uid and gid can never be null.<a name="line.253"></a>
-<span class="sourceLineNo">254</span> return version == xf.version && uid.equals(xf.uid) && gid.equals(xf.gid);<a name="line.254"></a>
-<span class="sourceLineNo">255</span> }<a name="line.255"></a>
-<span class="sourceLineNo">256</span> return false;<a name="line.256"></a>
-<span class="sourceLineNo">257</span> }<a name="line.257"></a>
-<span class="sourceLineNo">258</span><a name="line.258"></a>
-<span class="sourceLineNo">259</span> @Override<a name="line.259"></a>
-<span class="sourceLineNo">260</span> public int hashCode() {<a name="line.260"></a>
-<span class="sourceLineNo">261</span> int hc = (-1234567 * version);<a name="line.261"></a>
-<span class="sourceLineNo">262</span> // Since most UID's and GID's are below 65,536, this is (hopefully!)<a name="line.262"></a>
-<span class="sourceLineNo">263</span> // a nice way to make sure typical UID and GID values impact the hash<a name="line.263"></a>
-<span class="sourceLineNo">264</span> // as much as possible.<a name="line.264"></a>
-<span class="sourceLineNo">265</span> hc ^= Integer.rotateLeft(uid.hashCode(), 16);<a name="line.265"></a>
-<span class="sourceLineNo">266</span> hc ^= gid.hashCode();<a name="line.266"></a>
-<span class="sourceLineNo">267</span> return hc;<a name="line.267"></a>
-<span class="sourceLineNo">268</span> }<a name="line.268"></a>
-<span class="sourceLineNo">269</span><a name="line.269"></a>
-<span class="sourceLineNo">270</span> /**<a name="line.270"></a>
-<span class="sourceLineNo">271</span> * Not really for external usage, but marked "package" visibility<a name="line.271"></a>
-<span class="sourceLineNo">272</span> * to help us JUnit it. Trims a byte array of leading zeroes while<a name="line.272"></a>
-<span class="sourceLineNo">273</span> * also enforcing a minimum length, and thus it really trims AND pads<a name="line.273"></a>
-<span class="sourceLineNo">274</span> * at the same time.<a name="line.274"></a>
-<span class="sourceLineNo">275</span> *<a name="line.275"></a>
-<span class="sourceLineNo">276</span> * @param array byte[] array to trim & pad.<a name="line.276"></a>
-<span class="sourceLineNo">277</span> * @return trimmed & padded byte[] array.<a name="line.277"></a>
-<span class="sourceLineNo">278</span> */<a name="line.278"></a>
-<span class="sourceLineNo">279</span> static byte[] trimLeadingZeroesForceMinLength(byte[] array) {<a name="line.279"></a>
-<span class="sourceLineNo">280</span> if (array == null) {<a name="line.280"></a>
-<span class="sourceLineNo">281</span> return array;<a name="line.281"></a>
-<span class="sourceLineNo">282</span> }<a name="line.282"></a>
-<span class="sourceLineNo">283</span><a name="line.283"></a>
-<span class="sourceLineNo">284</span> int pos = 0;<a name="line.284"></a>
-<span class="sourceLineNo">285</span> for (byte b : array) {<a name="line.285"></a>
-<span class="sourceLineNo">286</span> if (b == 0) {<a name="line.286"></a>
-<span class="sourceLineNo">287</span> pos++;<a name="line.287"></a>
-<span class="sourceLineNo">288</span> } else {<a name="line.288"></a>
-<span class="sourceLineNo">289</span> break;<a name="line.289"></a>
-<span class="sourceLineNo">290</span> }<a name="line.290"></a>
-<span class="sourceLineNo">291</span> }<a name="line.291"></a>
-<span class="sourceLineNo">292</span><a name="line.292"></a>
-<span class="sourceLineNo">293</span> /*<a name="line.293"></a>
-<span class="sourceLineNo">294</span><a name="line.294"></a>
-<span class="sourceLineNo">295</span> I agonized over my choice of MIN_LENGTH=1. Here's the situation:<a name="line.295"></a>
-<span class="sourceLineNo">296</span> InfoZip (the tool I am using to test interop) always sets these<a name="line.296"></a>
-<span class="sourceLineNo">297</span> to length=4. And so a UID of 0 (typically root) for example is<a name="line.297"></a>
-<span class="sourceLineNo">298</span> encoded as {4,0,0,0,0} (len=4, 32 bits of zero), when it could just<a name="line.298"></a>
-<span class="sourceLineNo">299</span> as easily be encoded as {1,0} (len=1, 8 bits of zero) according to<a name="line.299"></a>
-<span class="sourceLineNo">300</span> the spec.<a name="line.300"></a>
-<span class="sourceLineNo">301</span><a name="line.301"></a>
-<span class="sourceLineNo">302</span> In the end I decided on MIN_LENGTH=1 for four reasons:<a name="line.302"></a>
-<span class="sourceLineNo">303</span><a name="line.303"></a>
-<span class="sourceLineNo">304</span> 1.) We are adhering to the spec as far as I can tell, and so<a name="line.304"></a>
-<span class="sourceLineNo">305</span> a consumer that cannot parse this is broken.<a name="line.305"></a>
-<span class="sourceLineNo">306</span><a name="line.306"></a>
-<span class="sourceLineNo">307</span> 2.) Fundamentally, zip files are about shrinking things, so<a name="line.307"></a>
-<span class="sourceLineNo">308</span> let's save a few bytes per entry while we can.<a name="line.308"></a>
-<span class="sourceLineNo">309</span><a name="line.309"></a>
-<span class="sourceLineNo">310</span> 3.) Of all the people creating zip files using commons-<a name="line.310"></a>
-<span class="sourceLineNo">311</span> compress, how many care about UNIX UID/GID attributes<a name="line.311"></a>
-<span class="sourceLineNo">312</span> of the files they store? (e.g., I am probably thinking<a name="line.312"></a>
-<span class="sourceLineNo">313</span> way too hard about this and no one cares!)<a name="line.313"></a>
-<span class="sourceLineNo">314</span><a name="line.314"></a>
-<span class="sourceLineNo">315</span> 4.) InfoZip's tool, even though it carefully stores every UID/GID<a name="line.315"></a>
-<span class="sourceLineNo">316</span> for every file zipped on a unix machine (by default) currently<a name="line.316"></a>
-<span class="sourceLineNo">317</span> appears unable to ever restore UID/GID.<a name="line.317"></a>
-<span class="sourceLineNo">318</span> unzip -X has no effect on my machine, even when run as root!!!!<a name="line.318"></a>
-<span class="sourceLineNo">319</span><a name="line.319"></a>
-<span class="sourceLineNo">320</span> And thus it is decided: MIN_LENGTH=1.<a name="line.320"></a>
-<span class="sourceLineNo">321</span><a name="line.321"></a>
-<span class="sourceLineNo">322</span> If anyone runs into interop problems from this, feel free to set<a name="line.322"></a>
-<span class="sourceLineNo">323</span> it to MIN_LENGTH=4 at some future time, and then we will behave<a name="line.323"></a>
-<span class="sourceLineNo">324</span> exactly like InfoZip (requires changes to unit tests, though).<a name="line.324"></a>
-<span class="sourceLineNo">325</span><a name="line.325"></a>
-<span class="sourceLineNo">326</span> And I am sorry that the time you spent reading this comment is now<a name="line.326"></a>
-<span class="sourceLineNo">327</span> gone and you can never have it back.<a name="line.327"></a>
-<span class="sourceLineNo">328</span><a name="line.328"></a>
-<span class="sourceLineNo">329</span> */<a name="line.329"></a>
-<span class="sourceLineNo">330</span> final int MIN_LENGTH = 1;<a name="line.330"></a>
-<span class="sourceLineNo">331</span><a name="line.331"></a>
-<span class="sourceLineNo">332</span> byte[] trimmedArray = new byte[Math.max(MIN_LENGTH, array.length - pos)];<a name="line.332"></a>
-<span class="sourceLineNo">333</span> int startPos = trimmedArray.length - (array.length - pos);<a name="line.333"></a>
-<span class="sourceLineNo">334</span> System.arraycopy(array, pos, trimmedArray, startPos, trimmedArray.length - startPos);<a name="line.334"></a>
-<span class="sourceLineNo">335</span> return trimmedArray;<a name="line.335"></a>
-<span class="sourceLineNo">336</span> }<a name="line.336"></a>
-<span class="sourceLineNo">337</span>}<a name="line.337"></a>
+<span class="sourceLineNo">045</span> * @since 1.5<a name="line.45"></a>
+<span class="sourceLineNo">046</span> */<a name="line.46"></a>
+<span class="sourceLineNo">047</span>public class X7875_NewUnix implements ZipExtraField, Cloneable, Serializable {<a name="line.47"></a>
+<span class="sourceLineNo">048</span> private static final ZipShort HEADER_ID = new ZipShort(0x7875);<a name="line.48"></a>
+<span class="sourceLineNo">049</span> private static final BigInteger ONE_THOUSAND = BigInteger.valueOf(1000);<a name="line.49"></a>
+<span class="sourceLineNo">050</span> private static final long serialVersionUID = 1L;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span> private int version = 1; // always '1' according to current info-zip spec.<a name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span> // BigInteger helps us with little-endian / big-endian conversions.<a name="line.54"></a>
+<span class="sourceLineNo">055</span> // (thanks to BigInteger.toByteArray() and a reverse() method we created).<a name="line.55"></a>
+<span class="sourceLineNo">056</span> // Also, the spec theoretically allows UID/GID up to 255 bytes long!<a name="line.56"></a>
+<span class="sourceLineNo">057</span> //<a name="line.57"></a>
+<span class="sourceLineNo">058</span> // NOTE: equals() and hashCode() currently assume these can never be null.<a name="line.58"></a>
+<span class="sourceLineNo">059</span> private BigInteger uid;<a name="line.59"></a>
+<span class="sourceLineNo">060</span> private BigInteger gid;<a name="line.60"></a>
+<span class="sourceLineNo">061</span><a name="line.61"></a>
+<span class="sourceLineNo">062</span> /**<a name="line.62"></a>
+<span class="sourceLineNo">063</span> * Constructor for X7875_NewUnix.<a name="line.63"></a>
+<span class="sourceLineNo">064</span> */<a name="line.64"></a>
+<span class="sourceLineNo">065</span> public X7875_NewUnix() {<a name="line.65"></a>
+<span class="sourceLineNo">066</span> reset();<a name="line.66"></a>
+<span class="sourceLineNo">067</span> }<a name="line.67"></a>
+<span class="sourceLineNo">068</span><a name="line.68"></a>
+<span class="sourceLineNo">069</span> /**<a name="line.69"></a>
+<span class="sourceLineNo">070</span> * The Header-ID.<a name="line.70"></a>
+<span class="sourceLineNo">071</span> *<a name="line.71"></a>
+<span class="sourceLineNo">072</span> * @return the value for the header id for this extrafield<a name="line.72"></a>
+<span class="sourceLineNo">073</span> */<a name="line.73"></a>
+<span class="sourceLineNo">074</span> public ZipShort getHeaderId() {<a name="line.74"></a>
+<span class="sourceLineNo">075</span> return HEADER_ID;<a name="line.75"></a>
+<span class="sourceLineNo">076</span> }<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> /**<a name="line.78"></a>
+<span class="sourceLineNo">079</span> * Gets the UID as a long. UID is typically a 32 bit unsigned<a name="line.79"></a>
+<span class="sourceLineNo">080</span> * value on most UNIX systems, so we return a long to avoid<a name="line.80"></a>
+<span class="sourceLineNo">081</span> * integer overflow into the negatives in case values above<a name="line.81"></a>
+<span class="sourceLineNo">082</span> * and including 2^31 are being used.<a name="line.82"></a>
+<span class="sourceLineNo">083</span> *<a name="line.83"></a>
+<span class="sourceLineNo">084</span> * @return the UID value.<a name="line.84"></a>
+<span class="sourceLineNo">085</span> */<a name="line.85"></a>
+<span class="sourceLineNo">086</span> public long getUID() { return ZipUtil.bigToLong(uid); }<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span> /**<a name="line.88"></a>
+<span class="sourceLineNo">089</span> * Gets the GID as a long. GID is typically a 32 bit unsigned<a name="line.89"></a>
+<span class="sourceLineNo">090</span> * value on most UNIX systems, so we return a long to avoid<a name="line.90"></a>
+<span class="sourceLineNo">091</span> * integer overflow into the negatives in case values above<a name="line.91"></a>
+<span class="sourceLineNo">092</span> * and including 2^31 are being used.<a name="line.92"></a>
+<span class="sourceLineNo">093</span> *<a name="line.93"></a>
+<span class="sourceLineNo">094</span> * @return the GID value.<a name="line.94"></a>
+<span class="sourceLineNo">095</span> */<a name="line.95"></a>
+<span class="sourceLineNo">096</span> public long getGID() { return ZipUtil.bigToLong(gid); }<a name="line.96"></a>
+<span class="sourceLineNo">097</span><a name="line.97"></a>
+<span class="sourceLineNo">098</span> /**<a name="line.98"></a>
+<span class="sourceLineNo">099</span> * Sets the UID.<a name="line.99"></a>
+<span class="sourceLineNo">100</span> *<a name="line.100"></a>
+<span class="sourceLineNo">101</span> * @param l UID value to set on this extra field.<a name="line.101"></a>
+<span class="sourceLineNo">102</span> */<a name="line.102"></a>
+<span class="sourceLineNo">103</span> public void setUID(long l) {<a name="line.103"></a>
+<span class="sourceLineNo">104</span> this.uid = ZipUtil.longToBig(l);<a name="line.104"></a>
+<span class="sourceLineNo">105</span> }<a name="line.105"></a>
+<span class="sourceLineNo">106</span><a name="line.106"></a>
+<span class="sourceLineNo">107</span> /**<a name="line.107"></a>
+<span class="sourceLineNo">108</span> * Sets the GID.<a name="line.108"></a>
+<span class="sourceLineNo">109</span> *<a name="line.109"></a>
+<span class="sourceLineNo">110</span> * @param l GID value to set on this extra field.<a name="line.110"></a>
+<span class="sourceLineNo">111</span> */<a name="line.111"></a>
+<span class="sourceLineNo">112</span> public void setGID(long l) {<a name="line.112"></a>
+<span class="sourceLineNo">113</span> this.gid = ZipUtil.longToBig(l);<a name="line.113"></a>
+<span class="sourceLineNo">114</span> }<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span> /**<a name="line.116"></a>
+<span class="sourceLineNo">117</span> * Length of the extra field in the local file data - without<a name="line.117"></a>
+<span class="sourceLineNo">118</span> * Header-ID or length specifier.<a name="line.118"></a>
+<span class="sourceLineNo">119</span> *<a name="line.119"></a>
+<span class="sourceLineNo">120</span> * @return a <code>ZipShort</code> for the length of the data of this extra field<a name="line.120"></a>
+<span class="sourceLineNo">121</span> */<a name="line.121"></a>
+<span class="sourceLineNo">122</span> public ZipShort getLocalFileDataLength() {<a name="line.122"></a>
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+<span class="sourceLineNo">124</span> int gidSize = trimLeadingZeroesForceMinLength(gid.toByteArray()).length;<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span> // The 3 comes from: version=1 + uidsize=1 + gidsize=1<a name="line.126"></a>
+<span class="sourceLineNo">127</span> return new ZipShort(3 + uidSize + gidSize);<a name="line.127"></a>
+<span class="sourceLineNo">128</span> }<a name="line.128"></a>
+<span class="sourceLineNo">129</span><a name="line.129"></a>
+<span class="sourceLineNo">130</span> /**<a name="line.130"></a>
+<span class="sourceLineNo">131</span> * Length of the extra field in the central directory data - without<a name="line.131"></a>
+<span class="sourceLineNo">132</span> * Header-ID or length specifier.<a name="line.132"></a>
+<span class="sourceLineNo">133</span> *<a name="line.133"></a>
+<span class="sourceLineNo">134</span> * @return a <code>ZipShort</code> for the length of the data of this extra field<a name="line.134"></a>
+<span class="sourceLineNo">135</span> */<a name="line.135"></a>
+<span class="sourceLineNo">136</span> public ZipShort getCentralDirectoryLength() {<a name="line.136"></a>
+<span class="sourceLineNo">137</span> return getLocalFileDataLength(); // No different than local version.<a name="line.137"></a>
+<span class="sourceLineNo">138</span> }<a name="line.138"></a>
+<span class="sourceLineNo">139</span><a name="line.139"></a>
+<span class="sourceLineNo">140</span> /**<a name="line.140"></a>
+<span class="sourceLineNo">141</span> * The actual data to put into local file data - without Header-ID<a name="line.141"></a>
+<span class="sourceLineNo">142</span> * or length specifier.<a name="line.142"></a>
+<span class="sourceLineNo">143</span> *<a name="line.143"></a>
+<span class="sourceLineNo">144</span> * @return get the data<a name="line.144"></a>
+<span class="sourceLineNo">145</span> */<a name="line.145"></a>
+<span class="sourceLineNo">146</span> public byte[] getLocalFileDataData() {<a name="line.146"></a>
+<span class="sourceLineNo">147</span> byte[] uidBytes = uid.toByteArray();<a name="line.147"></a>
+<span class="sourceLineNo">148</span> byte[] gidBytes = gid.toByteArray();<a name="line.148"></a>
+<span class="sourceLineNo">149</span><a name="line.149"></a>
+<span class="sourceLineNo">150</span> // BigInteger might prepend a leading-zero to force a positive representation<a name="line.150"></a>
+<span class="sourceLineNo">151</span> // (e.g., so that the sign-bit is set to zero). We need to remove that<a name="line.151"></a>
+<span class="sourceLineNo">152</span> // before sending the number over the wire.<a name="line.152"></a>
+<span class="sourceLineNo">153</span> uidBytes = trimLeadingZeroesForceMinLength(uidBytes);<a name="line.153"></a>
+<span class="sourceLineNo">154</span> gidBytes = trimLeadingZeroesForceMinLength(gidBytes);<a name="line.154"></a>
+<span class="sourceLineNo">155</span><a name="line.155"></a>
+<span class="sourceLineNo">156</span> // Couldn't bring myself to just call getLocalFileDataLength() when we've<a name="line.156"></a>
+<span class="sourceLineNo">157</span> // already got the arrays right here. Yeah, yeah, I know, premature<a name="line.157"></a>
+<span class="sourceLineNo">158</span> // optimization is the root of all...<a name="line.158"></a>
+<span class="sourceLineNo">159</span> //<a name="line.159"></a>
+<span class="sourceLineNo">160</span> // The 3 comes from: version=1 + uidsize=1 + gidsize=1<a name="line.160"></a>
+<span class="sourceLineNo">161</span> byte[] data = new byte[3 + uidBytes.length + gidBytes.length];<a name="line.161"></a>
+<span class="sourceLineNo">162</span><a name="line.162"></a>
+<span class="sourceLineNo">163</span> // reverse() switches byte array from big-endian to little-endian.<a name="line.163"></a>
+<span class="sourceLineNo">164</span> reverse(uidBytes);<a name="line.164"></a>
+<span class="sourceLineNo">165</span> reverse(gidBytes);<a name="line.165"></a>
+<span class="sourceLineNo">166</span><a name="line.166"></a>
+<span class="sourceLineNo">167</span> int pos = 0;<a name="line.167"></a>
+<span class="sourceLineNo">168</span> data[pos++] = unsignedIntToSignedByte(version);<a name="line.168"></a>
+<span class="sourceLineNo">169</span> data[pos++] = unsignedIntToSignedByte(uidBytes.length);<a name="line.169"></a>
+<span class="sourceLineNo">170</span> System.arraycopy(uidBytes, 0, data, pos, uidBytes.length);<a name="line.170"></a>
+<span class="sourceLineNo">171</span> pos += uidBytes.length;<a name="line.171"></a>
+<span class="sourceLineNo">172</span> data[pos++] = unsignedIntToSignedByte(gidBytes.length);<a name="line.172"></a>
+<span class="sourceLineNo">173</span> System.arraycopy(gidBytes, 0, data, pos, gidBytes.length);<a name="line.173"></a>
+<span class="sourceLineNo">174</span> return data;<a name="line.174"></a>
+<span class="sourceLineNo">175</span> }<a name="line.175"></a>
+<span class="sourceLineNo">176</span><a name="line.176"></a>
+<span class="sourceLineNo">177</span> /**<a name="line.177"></a>
+<span class="sourceLineNo">178</span> * The actual data to put into central directory data - without Header-ID<a name="line.178"></a>
+<span class="sourceLineNo">179</span> * or length specifier.<a name="line.179"></a>
+<span class="sourceLineNo">180</span> *<a name="line.180"></a>
+<span class="sourceLineNo">181</span> * @return get the data<a name="line.181"></a>
+<span class="sourceLineNo">182</span> */<a name="line.182"></a>
+<span class="sourceLineNo">183</span> public byte[] getCentralDirectoryData() {<a name="line.183"></a>
+<span class="sourceLineNo">184</span> return getLocalFileDataData();<a name="line.184"></a>
+<span class="sourceLineNo">185</span> }<a name="line.185"></a>
+<span class="sourceLineNo">186</span><a name="line.186"></a>
+<span class="sourceLineNo">187</span> /**<a name="line.187"></a>
+<span class="sourceLineNo">188</span> * Populate data from this array as if it was in local file data.<a name="line.188"></a>
+<span class="sourceLineNo">189</span> *<a name="line.189"></a>
+<span class="sourceLineNo">190</span> * @param data an array of bytes<a name="line.190"></a>
+<span class="sourceLineNo">191</span> * @param offset the start offset<a name="line.191"></a>
+<span class="sourceLineNo">192</span> * @param length the number of bytes in the array from offset<a name="line.192"></a>
+<span class="sourceLineNo">193</span> * @throws java.util.zip.ZipException on error<a name="line.193"></a>
+<span class="sourceLineNo">194</span> */<a name="line.194"></a>
+<span class="sourceLineNo">195</span> public void parseFromLocalFileData(<a name="line.195"></a>
+<span class="sourceLineNo">196</span> byte[] data, int offset, int length<a name="line.196"></a>
+<span class="sourceLineNo">197</span> ) throws ZipException {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> reset();<a name="line.198"></a>
+<span class="sourceLineNo">199</span> this.version = signedByteToUnsignedInt(data[offset++]);<a name="line.199"></a>
+<span class="sourceLineNo">200</span> int uidSize = signedByteToUnsignedInt(data[offset++]);<a name="line.200"></a>
+<span class="sourceLineNo">201</span> byte[] uidBytes = new byte[uidSize];<a name="line.201"></a>
+<span class="sourceLineNo">202</span> System.arraycopy(data, offset, uidBytes, 0, uidSize);<a name="line.202"></a>
+<span class="sourceLineNo">203</span> offset += uidSize;<a name="line.203"></a>
+<span class="sourceLineNo">204</span> this.uid = new BigInteger(1, reverse(uidBytes)); // sign-bit forced positive<a name="line.204"></a>
+<span class="sourceLineNo">205</span><a name="line.205"></a>
+<span class="sourceLineNo">206</span> int gidSize = signedByteToUnsignedInt(data[offset++]);<a name="line.206"></a>
+<span class="sourceLineNo">207</span> byte[] gidBytes = new byte[gidSize];<a name="line.207"></a>
+<span class="sourceLineNo">208</span> System.arraycopy(data, offset, gidBytes, 0, gidSize);<a name="line.208"></a>
+<span class="sourceLineNo">209</span> this.gid = new BigInteger(1, reverse(gidBytes)); // sign-bit forced positive<a name="line.209"></a>
+<span class="sourceLineNo">210</span> }<a name="line.210"></a>
+<span class="sourceLineNo">211</span><a name="line.211"></a>
+<span class="sourceLineNo">212</span> /**<a name="line.212"></a>
+<span class="sourceLineNo">213</span> * Doesn't do anything special since this class always uses the<a name="line.213"></a>
+<span class="sourceLineNo">214</span> * same data in central directory and local file data.<a name="line.214"></a>
+<span class="sourceLineNo">215</span> */<a name="line.215"></a>
+<span class="sourceLineNo">216</span> public void parseFromCentralDirectoryData(<a name="line.216"></a>
+<span class="sourceLineNo">217</span> byte[] buffer, int offset, int length<a name="line.217"></a>
+<span class="sourceLineNo">218</span> ) throws ZipException {<a name="line.218"></a>
+<span class="sourceLineNo">219</span> reset();<a name="line.219"></a>
+<span class="sourceLineNo">220</span> parseFromLocalFileData(buffer, offset, length);<a name="line.220"></a>
+<span class="sourceLineNo">221</span> }<a name="line.221"></a>
+<span class="sourceLineNo">222</span><a name="line.222"></a>
+<span class="sourceLineNo">223</span> /**<a name="line.223"></a>
+<span class="sourceLineNo">224</span> * Reset state back to newly constructed state. Helps us make sure<a name="line.224"></a>
+<span class="sourceLineNo">225</span> * parse() calls always generate clean results.<a name="line.225"></a>
+<span class="sourceLineNo">226</span> */<a name="line.226"></a>
+<span class="sourceLineNo">227</span> private void reset() {<a name="line.227"></a>
+<span class="sourceLineNo">228</span> // Typical UID/GID of the first non-root user created on a unix system.<a name="line.228"></a>
+<span class="sourceLineNo">229</span> uid = ONE_THOUSAND;<a name="line.229"></a>
+<span class="sourceLineNo">230</span> gid = ONE_THOUSAND;<a name="line.230"></a>
+<span class="sourceLineNo">231</span> }<a name="line.231"></a>
+<span class="sourceLineNo">232</span><a name="line.232"></a>
+<span class="sourceLineNo">233</span> /**<a name="line.233"></a>
+<span class="sourceLineNo">234</span> * Returns a String representation of this class useful for<a name="line.234"></a>
+<span class="sourceLineNo">235</span> * debugging purposes.<a name="line.235"></a>
+<span class="sourceLineNo">236</span> *<a name="line.236"></a>
+<span class="sourceLineNo">237</span> * @return A String representation of this class useful for<a name="line.237"></a>
+<span class="sourceLineNo">238</span> * debugging purposes.<a name="line.238"></a>
+<span class="sourceLineNo">239</span> */<a name="line.239"></a>
+<span class="sourceLineNo">240</span> @Override<a name="line.240"></a>
+<span class="sourceLineNo">241</span> public String toString() {<a name="line.241"></a>
+<span class="sourceLineNo">242</span> return "0x7875 Zip Extra Field: UID=" + uid + " GID=" + gid;<a name="line.242"></a>
+<span class="sourceLineNo">243</span> }<a name="line.243"></a>
+<span class="sourceLineNo">244</span><a name="line.244"></a>
+<span class="sourceLineNo">245</span> @Override<a name="line.245"></a>
+<span class="sourceLineNo">246</span> public Object clone() throws CloneNotSupportedException {<a name="line.246"></a>
+<span class="sourceLineNo">247</span> return super.clone();<a name="line.247"></a>
+<span class="sourceLineNo">248</span> }<a name="line.248"></a>
+<span class="sourceLineNo">249</span><a name="line.249"></a>
+<span class="sourceLineNo">250</span> @Override<a name="line.250"></a>
+<span class="sourceLineNo">251</span> public boolean equals(Object o) {<a name="line.251"></a>
+<span class="sourceLineNo">252</span> if (o instanceof X7875_NewUnix) {<a name="line.252"></a>
+<span class="sourceLineNo">253</span> X7875_NewUnix xf = (X7875_NewUnix) o;<a name="line.253"></a>
+<span class="sourceLineNo">254</span> // We assume uid and gid can never be null.<a name="line.254"></a>
+<span class="sourceLineNo">255</span> return version == xf.version && uid.equals(xf.uid) && gid.equals(xf.gid);<a name="line.255"></a>
+<span class="sourceLineNo">256</span> }<a name="line.256"></a>
+<span class="sourceLineNo">257</span> return false;<a name="line.257"></a>
+<span class="sourceLineNo">258</span> }<a name="line.258"></a>
+<span class="sourceLineNo">259</span><a name="line.259"></a>
+<span class="sourceLineNo">260</span> @Override<a name="line.260"></a>
+<span class="sourceLineNo">261</span> public int hashCode() {<a name="line.261"></a>
+<span class="sourceLineNo">262</span> int hc = (-1234567 * version);<a name="line.262"></a>
+<span class="sourceLineNo">263</span> // Since most UID's and GID's are below 65,536, this is (hopefully!)<a name="line.263"></a>
+<span class="sourceLineNo">264</span> // a nice way to make sure typical UID and GID values impact the hash<a name="line.264"></a>
+<span class="sourceLineNo">265</span> // as much as possible.<a name="line.265"></a>
+<span class="sourceLineNo">266</span> hc ^= Integer.rotateLeft(uid.hashCode(), 16);<a name="line.266"></a>
+<span class="sourceLineNo">267</span> hc ^= gid.hashCode();<a name="line.267"></a>
+<span class="sourceLineNo">268</span> return hc;<a name="line.268"></a>
+<span class="sourceLineNo">269</span> }<a name="line.269"></a>
+<span class="sourceLineNo">270</span><a name="line.270"></a>
+<span class="sourceLineNo">271</span> /**<a name="line.271"></a>
+<span class="sourceLineNo">272</span> * Not really for external usage, but marked "package" visibility<a name="line.272"></a>
+<span class="sourceLineNo">273</span> * to help us JUnit it. Trims a byte array of leading zeroes while<a name="line.273"></a>
+<span class="sourceLineNo">274</span> * also enforcing a minimum length, and thus it really trims AND pads<a name="line.274"></a>
+<span class="sourceLineNo">275</span> * at the same time.<a name="line.275"></a>
+<span class="sourceLineNo">276</span> *<a name="line.276"></a>
+<span class="sourceLineNo">277</span> * @param array byte[] array to trim & pad.<a name="line.277"></a>
+<span class="sourceLineNo">278</span> * @return trimmed & padded byte[] array.<a name="line.278"></a>
+<span class="sourceLineNo">279</span> */<a name="line.279"></a>
+<span class="sourceLineNo">280</span> static byte[] trimLeadingZeroesForceMinLength(byte[] array) {<a name="line.280"></a>
+<span class="sourceLineNo">281</span> if (array == null) {<a name="line.281"></a>
+<span class="sourceLineNo">282</span> return array;<a name="line.282"></a>
+<span class="sourceLineNo">283</span> }<a name="line.283"></a>
+<span class="sourceLineNo">284</span><a name="line.284"></a>
+<span class="sourceLineNo">285</span> int pos = 0;<a name="line.285"></a>
+<span class="sourceLineNo">286</span> for (byte b : array) {<a name="line.286"></a>
+<span class="sourceLineNo">287</span> if (b == 0) {<a name="line.287"></a>
+<span class="sourceLineNo">288</span> pos++;<a name="line.288"></a>
+<span class="sourceLineNo">289</span> } else {<a name="line.289"></a>
+<span class="sourceLineNo">290</span> break;<a name="line.290"></a>
+<span class="sourceLineNo">291</span> }<a name="line.291"></a>
+<span class="sourceLineNo">292</span> }<a name="line.292"></a>
+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span> /*<a name="line.294"></a>
+<span class="sourceLineNo">295</span><a name="line.295"></a>
+<span class="sourceLineNo">296</span> I agonized over my choice of MIN_LENGTH=1. Here's the situation:<a name="line.296"></a>
+<span class="sourceLineNo">297</span> InfoZip (the tool I am using to test interop) always sets these<a name="line.297"></a>
+<span class="sourceLineNo">298</span> to length=4. And so a UID of 0 (typically root) for example is<a name="line.298"></a>
+<span class="sourceLineNo">299</span> encoded as {4,0,0,0,0} (len=4, 32 bits of zero), when it could just<a name="line.299"></a>
+<span class="sourceLineNo">300</span> as easily be encoded as {1,0} (len=1, 8 bits of zero) according to<a name="line.300"></a>
+<span class="sourceLineNo">301</span> the spec.<a name="line.301"></a>
+<span class="sourceLineNo">302</span><a name="line.302"></a>
+<span class="sourceLineNo">303</span> In the end I decided on MIN_LENGTH=1 for four reasons:<a name="line.303"></a>
+<span class="sourceLineNo">304</span><a name="line.304"></a>
+<span class="sourceLineNo">305</span> 1.) We are adhering to the spec as far as I can tell, and so<a name="line.305"></a>
+<span class="sourceLineNo">306</span> a consumer that cannot parse this is broken.<a name="line.306"></a>
+<span class="sourceLineNo">307</span><a name="line.307"></a>
+<span class="sourceLineNo">308</span> 2.) Fundamentally, zip files are about shrinking things, so<a name="line.308"></a>
+<span class="sourceLineNo">309</span> let's save a few bytes per entry while we can.<a name="line.309"></a>
+<span class="sourceLineNo">310</span><a name="line.310"></a>
+<span class="sourceLineNo">311</span> 3.) Of all the people creating zip files using commons-<a name="line.311"></a>
+<span class="sourceLineNo">312</span> compress, how many care about UNIX UID/GID attributes<a name="line.312"></a>
+<span class="sourceLineNo">313</span> of the files they store? (e.g., I am probably thinking<a name="line.313"></a>
+<span class="sourceLineNo">314</span> way too hard about this and no one cares!)<a name="line.314"></a>
+<span class="sourceLineNo">315</span><a name="line.315"></a>
+<span class="sourceLineNo">316</span> 4.) InfoZip's tool, even though it carefully stores every UID/GID<a name="line.316"></a>
+<span class="sourceLineNo">317</span> for every file zipped on a unix machine (by default) currently<a name="line.317"></a>
+<span class="sourceLineNo">318</span> appears unable to ever restore UID/GID.<a name="line.318"></a>
+<span class="sourceLineNo">319</span> unzip -X has no effect on my machine, even when run as root!!!!<a name="line.319"></a>
+<span class="sourceLineNo">320</span><a name="line.320"></a>
+<span class="sourceLineNo">321</span> And thus it is decided: MIN_LENGTH=1.<a name="line.321"></a>
+<span class="sourceLineNo">322</span><a name="line.322"></a>
+<span class="sourceLineNo">323</span> If anyone runs into interop problems from this, feel free to set<a name="line.323"></a>
+<span class="sourceLineNo">324</span> it to MIN_LENGTH=4 at some future time, and then we will behave<a name="line.324"></a>
+<span class="sourceLineNo">325</span> exactly like InfoZip (requires changes to unit tests, though).<a name="line.325"></a>
+<span class="sourceLineNo">326</span><a name="line.326"></a>
+<span class="sourceLineNo">327</span> And I am sorry that the time you spent reading this comment is now<a name="line.327"></a>
+<span class="sourceLineNo">328</span> gone and you can never have it back.<a name="line.328"></a>
+<span class="sourceLineNo">329</span><a name="line.329"></a>
+<span class="sourceLineNo">330</span> */<a name="line.330"></a>
+<span class="sourceLineNo">331</span> final int MIN_LENGTH = 1;<a name="line.331"></a>
+<span class="sourceLineNo">332</span><a name="line.332"></a>
+<span class="sourceLineNo">333</span> byte[] trimmedArray = new byte[Math.max(MIN_LENGTH, array.length - pos)];<a name="line.333"></a>
+<span class="sourceLineNo">334</span> int startPos = trimmedArray.length - (array.length - pos);<a name="line.334"></a>
+<span class="sourceLineNo">335</span> System.arraycopy(array, pos, trimmedArray, startPos, trimmedArray.length - startPos);<a name="line.335"></a>
+<span class="sourceLineNo">336</span> return trimmedArray;<a name="line.336"></a>
+<span class="sourceLineNo">337</span> }<a name="line.337"></a>
+<span class="sourceLineNo">338</span>}<a name="line.338"></a>