http://git-wip-us.apache.org/repos/asf/hbase-site/blob/e5c3dcd1/apidocs/src-html/org/apache/hadoop/hbase/util/ByteBufferUtils.html ---------------------------------------------------------------------- diff --git a/apidocs/src-html/org/apache/hadoop/hbase/util/ByteBufferUtils.html b/apidocs/src-html/org/apache/hadoop/hbase/util/ByteBufferUtils.html index a0752a9..7a44701 100644 --- a/apidocs/src-html/org/apache/hadoop/hbase/util/ByteBufferUtils.html +++ b/apidocs/src-html/org/apache/hadoop/hbase/util/ByteBufferUtils.html @@ -55,872 +55,877 @@ <span class="sourceLineNo">047</span> public final static int NEXT_BIT_SHIFT = 7;<a name="line.47"></a> <span class="sourceLineNo">048</span> public final static int NEXT_BIT_MASK = 1 << 7;<a name="line.48"></a> <span class="sourceLineNo">049</span> private static final boolean UNSAFE_AVAIL = UnsafeAccess.isAvailable();<a name="line.49"></a> -<span class="sourceLineNo">050</span><a name="line.50"></a> -<span class="sourceLineNo">051</span> private ByteBufferUtils() {<a name="line.51"></a> -<span class="sourceLineNo">052</span> }<a name="line.52"></a> -<span class="sourceLineNo">053</span><a name="line.53"></a> -<span class="sourceLineNo">054</span> /**<a name="line.54"></a> -<span class="sourceLineNo">055</span> * Similar to {@link WritableUtils#writeVLong(java.io.DataOutput, long)},<a name="line.55"></a> -<span class="sourceLineNo">056</span> * but writes to a {@link ByteBuffer}.<a name="line.56"></a> -<span class="sourceLineNo">057</span> */<a name="line.57"></a> -<span class="sourceLineNo">058</span> public static void writeVLong(ByteBuffer out, long i) {<a name="line.58"></a> -<span class="sourceLineNo">059</span> if (i >= -112 && i <= 127) {<a name="line.59"></a> -<span class="sourceLineNo">060</span> out.put((byte) i);<a name="line.60"></a> -<span class="sourceLineNo">061</span> return;<a name="line.61"></a> -<span class="sourceLineNo">062</span> }<a name="line.62"></a> -<span class="sourceLineNo">063</span><a name="line.63"></a> -<span class="sourceLineNo">064</span> int len = -112;<a name="line.64"></a> -<span class="sourceLineNo">065</span> if (i < 0) {<a name="line.65"></a> -<span class="sourceLineNo">066</span> i ^= -1L; // take one's complement<a name="line.66"></a> -<span class="sourceLineNo">067</span> len = -120;<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> long tmp = i;<a name="line.70"></a> -<span class="sourceLineNo">071</span> while (tmp != 0) {<a name="line.71"></a> -<span class="sourceLineNo">072</span> tmp = tmp >> 8;<a name="line.72"></a> -<span class="sourceLineNo">073</span> len--;<a name="line.73"></a> -<span class="sourceLineNo">074</span> }<a name="line.74"></a> -<span class="sourceLineNo">075</span><a name="line.75"></a> -<span class="sourceLineNo">076</span> out.put((byte) len);<a name="line.76"></a> -<span class="sourceLineNo">077</span><a name="line.77"></a> -<span class="sourceLineNo">078</span> len = (len < -120) ? -(len + 120) : -(len + 112);<a name="line.78"></a> -<span class="sourceLineNo">079</span><a name="line.79"></a> -<span class="sourceLineNo">080</span> for (int idx = len; idx != 0; idx--) {<a name="line.80"></a> -<span class="sourceLineNo">081</span> int shiftbits = (idx - 1) * 8;<a name="line.81"></a> -<span class="sourceLineNo">082</span> long mask = 0xFFL << shiftbits;<a name="line.82"></a> -<span class="sourceLineNo">083</span> out.put((byte) ((i & mask) >> shiftbits));<a name="line.83"></a> -<span class="sourceLineNo">084</span> }<a name="line.84"></a> -<span class="sourceLineNo">085</span> }<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> * Similar to {@link WritableUtils#readVLong(DataInput)} but reads from a<a name="line.88"></a> -<span class="sourceLineNo">089</span> * {@link ByteBuffer}.<a name="line.89"></a> -<span class="sourceLineNo">090</span> */<a name="line.90"></a> -<span class="sourceLineNo">091</span> public static long readVLong(ByteBuffer in) {<a name="line.91"></a> -<span class="sourceLineNo">092</span> byte firstByte = in.get();<a name="line.92"></a> -<span class="sourceLineNo">093</span> int len = WritableUtils.decodeVIntSize(firstByte);<a name="line.93"></a> -<span class="sourceLineNo">094</span> if (len == 1) {<a name="line.94"></a> -<span class="sourceLineNo">095</span> return firstByte;<a name="line.95"></a> -<span class="sourceLineNo">096</span> }<a name="line.96"></a> -<span class="sourceLineNo">097</span> long i = 0;<a name="line.97"></a> -<span class="sourceLineNo">098</span> for (int idx = 0; idx < len-1; idx++) {<a name="line.98"></a> -<span class="sourceLineNo">099</span> byte b = in.get();<a name="line.99"></a> -<span class="sourceLineNo">100</span> i = i << 8;<a name="line.100"></a> -<span class="sourceLineNo">101</span> i = i | (b & 0xFF);<a name="line.101"></a> -<span class="sourceLineNo">102</span> }<a name="line.102"></a> -<span class="sourceLineNo">103</span> return (WritableUtils.isNegativeVInt(firstByte) ? (i ^ -1L) : i);<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">050</span> private static final boolean UNSAFE_UNALIGNED = UnsafeAccess.unaligned();<a name="line.50"></a> +<span class="sourceLineNo">051</span><a name="line.51"></a> +<span class="sourceLineNo">052</span> private ByteBufferUtils() {<a name="line.52"></a> +<span class="sourceLineNo">053</span> }<a name="line.53"></a> +<span class="sourceLineNo">054</span><a name="line.54"></a> +<span class="sourceLineNo">055</span> /**<a name="line.55"></a> +<span class="sourceLineNo">056</span> * Similar to {@link WritableUtils#writeVLong(java.io.DataOutput, long)},<a name="line.56"></a> +<span class="sourceLineNo">057</span> * but writes to a {@link ByteBuffer}.<a name="line.57"></a> +<span class="sourceLineNo">058</span> */<a name="line.58"></a> +<span class="sourceLineNo">059</span> public static void writeVLong(ByteBuffer out, long i) {<a name="line.59"></a> +<span class="sourceLineNo">060</span> if (i >= -112 && i <= 127) {<a name="line.60"></a> +<span class="sourceLineNo">061</span> out.put((byte) i);<a name="line.61"></a> +<span class="sourceLineNo">062</span> return;<a name="line.62"></a> +<span class="sourceLineNo">063</span> }<a name="line.63"></a> +<span class="sourceLineNo">064</span><a name="line.64"></a> +<span class="sourceLineNo">065</span> int len = -112;<a name="line.65"></a> +<span class="sourceLineNo">066</span> if (i < 0) {<a name="line.66"></a> +<span class="sourceLineNo">067</span> i ^= -1L; // take one's complement<a name="line.67"></a> +<span class="sourceLineNo">068</span> len = -120;<a name="line.68"></a> +<span class="sourceLineNo">069</span> }<a name="line.69"></a> +<span class="sourceLineNo">070</span><a name="line.70"></a> +<span class="sourceLineNo">071</span> long tmp = i;<a name="line.71"></a> +<span class="sourceLineNo">072</span> while (tmp != 0) {<a name="line.72"></a> +<span class="sourceLineNo">073</span> tmp = tmp >> 8;<a name="line.73"></a> +<span class="sourceLineNo">074</span> len--;<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> out.put((byte) len);<a name="line.77"></a> +<span class="sourceLineNo">078</span><a name="line.78"></a> +<span class="sourceLineNo">079</span> len = (len < -120) ? -(len + 120) : -(len + 112);<a name="line.79"></a> +<span class="sourceLineNo">080</span><a name="line.80"></a> +<span class="sourceLineNo">081</span> for (int idx = len; idx != 0; idx--) {<a name="line.81"></a> +<span class="sourceLineNo">082</span> int shiftbits = (idx - 1) * 8;<a name="line.82"></a> +<span class="sourceLineNo">083</span> long mask = 0xFFL << shiftbits;<a name="line.83"></a> +<span class="sourceLineNo">084</span> out.put((byte) ((i & mask) >> shiftbits));<a name="line.84"></a> +<span class="sourceLineNo">085</span> }<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> /**<a name="line.88"></a> +<span class="sourceLineNo">089</span> * Similar to {@link WritableUtils#readVLong(DataInput)} but reads from a<a name="line.89"></a> +<span class="sourceLineNo">090</span> * {@link ByteBuffer}.<a name="line.90"></a> +<span class="sourceLineNo">091</span> */<a name="line.91"></a> +<span class="sourceLineNo">092</span> public static long readVLong(ByteBuffer in) {<a name="line.92"></a> +<span class="sourceLineNo">093</span> byte firstByte = in.get();<a name="line.93"></a> +<span class="sourceLineNo">094</span> int len = WritableUtils.decodeVIntSize(firstByte);<a name="line.94"></a> +<span class="sourceLineNo">095</span> if (len == 1) {<a name="line.95"></a> +<span class="sourceLineNo">096</span> return firstByte;<a name="line.96"></a> +<span class="sourceLineNo">097</span> }<a name="line.97"></a> +<span class="sourceLineNo">098</span> long i = 0;<a name="line.98"></a> +<span class="sourceLineNo">099</span> for (int idx = 0; idx < len-1; idx++) {<a name="line.99"></a> +<span class="sourceLineNo">100</span> byte b = in.get();<a name="line.100"></a> +<span class="sourceLineNo">101</span> i = i << 8;<a name="line.101"></a> +<span class="sourceLineNo">102</span> i = i | (b & 0xFF);<a name="line.102"></a> +<span class="sourceLineNo">103</span> }<a name="line.103"></a> +<span class="sourceLineNo">104</span> return (WritableUtils.isNegativeVInt(firstByte) ? 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name="line.118"></a> -<span class="sourceLineNo">119</span> int tmpvalue = value;<a name="line.119"></a> -<span class="sourceLineNo">120</span> do {<a name="line.120"></a> -<span class="sourceLineNo">121</span> byte b = (byte) (tmpvalue & VALUE_MASK);<a name="line.121"></a> -<span class="sourceLineNo">122</span> tmpvalue >>>= NEXT_BIT_SHIFT;<a name="line.122"></a> -<span class="sourceLineNo">123</span> if (tmpvalue != 0) {<a name="line.123"></a> -<span class="sourceLineNo">124</span> b |= (byte) NEXT_BIT_MASK;<a name="line.124"></a> -<span class="sourceLineNo">125</span> }<a name="line.125"></a> -<span class="sourceLineNo">126</span> out.write(b);<a name="line.126"></a> -<span class="sourceLineNo">127</span> i++;<a name="line.127"></a> -<span class="sourceLineNo">128</span> } while (tmpvalue != 0);<a name="line.128"></a> -<span class="sourceLineNo">129</span> return i;<a name="line.129"></a> -<span class="sourceLineNo">130</span> }<a name="line.130"></a> -<span class="sourceLineNo">131</span><a name="line.131"></a> -<span class="sourceLineNo">132</span> /**<a name="line.132"></a> -<span class="sourceLineNo">133</span> * Put in output stream 32 bit integer (Big Endian byte order).<a name="line.133"></a> -<span class="sourceLineNo">134</span> * @param out Where to put integer.<a name="line.134"></a> -<span class="sourceLineNo">135</span> * @param value Value of integer.<a name="line.135"></a> -<span class="sourceLineNo">136</span> * @throws IOException On stream error.<a name="line.136"></a> -<span class="sourceLineNo">137</span> */<a name="line.137"></a> -<span class="sourceLineNo">138</span> public static void putInt(OutputStream out, final int value)<a name="line.138"></a> -<span class="sourceLineNo">139</span> throws IOException {<a name="line.139"></a> -<span class="sourceLineNo">140</span> // We have writeInt in ByteBufferOutputStream so that it can directly write<a name="line.140"></a> -<span class="sourceLineNo">141</span> // int to 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void moveBufferToStream(OutputStream out, ByteBuffer in,<a name="line.164"></a> -<span class="sourceLineNo">165</span> int length) throws IOException {<a name="line.165"></a> -<span class="sourceLineNo">166</span> copyBufferToStream(out, in, in.position(), length);<a name="line.166"></a> -<span class="sourceLineNo">167</span> skip(in, length);<a name="line.167"></a> -<span class="sourceLineNo">168</span> }<a name="line.168"></a> -<span class="sourceLineNo">169</span><a name="line.169"></a> -<span class="sourceLineNo">170</span> /**<a name="line.170"></a> -<span class="sourceLineNo">171</span> * Copy data from a buffer to an output stream. 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class="sourceLineNo">181</span> if (in.hasArray()) {<a name="line.181"></a> -<span class="sourceLineNo">182</span> out.write(in.array(), in.arrayOffset() + offset,<a name="line.182"></a> -<span class="sourceLineNo">183</span> length);<a name="line.183"></a> -<span class="sourceLineNo">184</span> } else {<a name="line.184"></a> -<span class="sourceLineNo">185</span> for (int i = 0; i < length; ++i) {<a name="line.185"></a> -<span class="sourceLineNo">186</span> out.write(toByte(in, offset + i));<a name="line.186"></a> -<span class="sourceLineNo">187</span> }<a name="line.187"></a> -<span class="sourceLineNo">188</span> }<a name="line.188"></a> -<span class="sourceLineNo">189</span> }<a name="line.189"></a> -<span class="sourceLineNo">190</span><a name="line.190"></a> -<span class="sourceLineNo">191</span> public static int putLong(OutputStream out, final long value,<a name="line.191"></a> -<span class="sourceLineNo">192</span> final int fitInBytes) throws IOException {<a name="line.192"></a> -<span class="sourceLineNo">193</span> long tmpValue = value;<a name="line.193"></a> -<span class="sourceLineNo">194</span> for (int i = 0; i < fitInBytes; ++i) {<a name="line.194"></a> -<span class="sourceLineNo">195</span> out.write((byte) (tmpValue & 0xff));<a name="line.195"></a> -<span class="sourceLineNo">196</span> tmpValue >>>= 8;<a name="line.196"></a> -<span class="sourceLineNo">197</span> }<a name="line.197"></a> -<span class="sourceLineNo">198</span> return fitInBytes;<a name="line.198"></a> -<span class="sourceLineNo">199</span> }<a name="line.199"></a> -<span class="sourceLineNo">200</span><a name="line.200"></a> -<span class="sourceLineNo">201</span> public static int putByte(ByteBuffer buffer, int offset, byte b) {<a name="line.201"></a> -<span class="sourceLineNo">202</span> if (UnsafeAccess.isAvailable()) {<a name="line.202"></a> -<span class="sourceLineNo">203</span> return UnsafeAccess.putByte(buffer, offset, b);<a name="line.203"></a> -<span 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name="line.119"></a> +<span class="sourceLineNo">120</span> int tmpvalue = value;<a name="line.120"></a> +<span class="sourceLineNo">121</span> do {<a name="line.121"></a> +<span class="sourceLineNo">122</span> byte b = (byte) (tmpvalue & VALUE_MASK);<a name="line.122"></a> +<span class="sourceLineNo">123</span> tmpvalue >>>= NEXT_BIT_SHIFT;<a name="line.123"></a> +<span class="sourceLineNo">124</span> if (tmpvalue != 0) {<a name="line.124"></a> +<span class="sourceLineNo">125</span> b |= (byte) NEXT_BIT_MASK;<a name="line.125"></a> +<span class="sourceLineNo">126</span> }<a name="line.126"></a> +<span class="sourceLineNo">127</span> out.write(b);<a name="line.127"></a> +<span class="sourceLineNo">128</span> i++;<a name="line.128"></a> +<span class="sourceLineNo">129</span> } while (tmpvalue != 0);<a name="line.129"></a> +<span class="sourceLineNo">130</span> return i;<a name="line.130"></a> +<span class="sourceLineNo">131</span> }<a name="line.131"></a> +<span class="sourceLineNo">132</span><a name="line.132"></a> +<span class="sourceLineNo">133</span> /**<a name="line.133"></a> +<span class="sourceLineNo">134</span> * Put in output stream 32 bit integer (Big Endian byte order).<a name="line.134"></a> +<span class="sourceLineNo">135</span> * @param out Where to put integer.<a name="line.135"></a> +<span class="sourceLineNo">136</span> * @param value Value of integer.<a name="line.136"></a> +<span class="sourceLineNo">137</span> * @throws IOException On stream error.<a name="line.137"></a> +<span class="sourceLineNo">138</span> */<a name="line.138"></a> +<span class="sourceLineNo">139</span> public static void putInt(OutputStream out, final int value)<a name="line.139"></a> +<span class="sourceLineNo">140</span> throws IOException {<a name="line.140"></a> +<span class="sourceLineNo">141</span> // We have writeInt in ByteBufferOutputStream so that it can directly write<a name="line.141"></a> +<span class="sourceLineNo">142</span> // int to 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void moveBufferToStream(OutputStream out, ByteBuffer in,<a name="line.165"></a> +<span class="sourceLineNo">166</span> int length) throws IOException {<a name="line.166"></a> +<span class="sourceLineNo">167</span> copyBufferToStream(out, in, in.position(), length);<a name="line.167"></a> +<span class="sourceLineNo">168</span> skip(in, length);<a name="line.168"></a> +<span class="sourceLineNo">169</span> }<a name="line.169"></a> +<span class="sourceLineNo">170</span><a name="line.170"></a> +<span class="sourceLineNo">171</span> /**<a name="line.171"></a> +<span class="sourceLineNo">172</span> * Copy data from a buffer to an output stream. 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class="sourceLineNo">182</span> if (in.hasArray()) {<a name="line.182"></a> +<span class="sourceLineNo">183</span> out.write(in.array(), in.arrayOffset() + offset,<a name="line.183"></a> +<span class="sourceLineNo">184</span> length);<a name="line.184"></a> +<span class="sourceLineNo">185</span> } else {<a name="line.185"></a> +<span class="sourceLineNo">186</span> for (int i = 0; i < length; ++i) {<a name="line.186"></a> +<span class="sourceLineNo">187</span> out.write(toByte(in, offset + i));<a name="line.187"></a> +<span class="sourceLineNo">188</span> }<a name="line.188"></a> +<span class="sourceLineNo">189</span> }<a name="line.189"></a> +<span class="sourceLineNo">190</span> }<a name="line.190"></a> +<span class="sourceLineNo">191</span><a name="line.191"></a> +<span class="sourceLineNo">192</span> public static int putLong(OutputStream out, final long value,<a name="line.192"></a> +<span class="sourceLineNo">193</span> final int fitInBytes) throws IOException {<a name="line.193"></a> +<span class="sourceLineNo">194</span> long tmpValue = value;<a name="line.194"></a> +<span class="sourceLineNo">195</span> for (int i = 0; i < fitInBytes; ++i) {<a name="line.195"></a> +<span class="sourceLineNo">196</span> out.write((byte) (tmpValue & 0xff));<a name="line.196"></a> +<span class="sourceLineNo">197</span> tmpValue >>>= 8;<a name="line.197"></a> +<span class="sourceLineNo">198</span> }<a name="line.198"></a> +<span class="sourceLineNo">199</span> return fitInBytes;<a name="line.199"></a> +<span class="sourceLineNo">200</span> }<a name="line.200"></a> +<span class="sourceLineNo">201</span><a name="line.201"></a> +<span class="sourceLineNo">202</span> public static int putByte(ByteBuffer buffer, int offset, byte b) {<a name="line.202"></a> +<span class="sourceLineNo">203</span> if (UnsafeAccess.isAvailable()) {<a name="line.203"></a> +<span class="sourceLineNo">204</span> return UnsafeAccess.putByte(buffer, offset, b);<a name="line.204"></a> +<span 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name="line.216"></a> +<span class="sourceLineNo">217</span> if (value < 0) {<a name="line.217"></a> +<span class="sourceLineNo">218</span> return 8;<a name="line.218"></a> +<span class="sourceLineNo">219</span> }<a name="line.219"></a> +<span class="sourceLineNo">220</span><a name="line.220"></a> +<span class="sourceLineNo">221</span> if (value < (1l << 4 * 8)) {<a name="line.221"></a> +<span class="sourceLineNo">222</span> // no more than 4 bytes<a name="line.222"></a> +<span class="sourceLineNo">223</span> if (value < (1l << 2 * 8)) {<a name="line.223"></a> +<span class="sourceLineNo">224</span> if (value < (1l << 1 * 8)) {<a name="line.224"></a> +<span class="sourceLineNo">225</span> return 1;<a name="line.225"></a> +<span class="sourceLineNo">226</span> }<a name="line.226"></a> +<span class="sourceLineNo">227</span> return 2;<a name="line.227"></a> +<span class="sourceLineNo">228</span> }<a name="line.228"></a> +<span class="sourceLineNo">229</span> if (value < (1l << 3 * 8)) {<a name="line.229"></a> +<span class="sourceLineNo">230</span> return 3;<a name="line.230"></a> +<span class="sourceLineNo">231</span> }<a name="line.231"></a> +<span class="sourceLineNo">232</span> return 4;<a name="line.232"></a> +<span class="sourceLineNo">233</span> }<a name="line.233"></a> +<span class="sourceLineNo">234</span> // more than 4 bytes<a name="line.234"></a> +<span class="sourceLineNo">235</span> if (value < (1l << 6 * 8)) {<a name="line.235"></a> +<span class="sourceLineNo">236</span> if (value < (1l << 5 * 8)) {<a name="line.236"></a> +<span class="sourceLineNo">237</span> return 5;<a name="line.237"></a> +<span class="sourceLineNo">238</span> }<a name="line.238"></a> +<span class="sourceLineNo">239</span> return 6;<a name="line.239"></a> +<span class="sourceLineNo">240</span> }<a name="line.240"></a> +<span class="sourceLineNo">241</span> if (value < (1l << 7 * 8)) {<a name="line.241"></a> +<span class="sourceLineNo">242</span> return 7;<a name="line.242"></a> +<span 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class="sourceLineNo">255</span> }<a name="line.255"></a> +<span class="sourceLineNo">256</span><a name="line.256"></a> +<span class="sourceLineNo">257</span> if (value < (1 << 2 * 8)) {<a name="line.257"></a> +<span class="sourceLineNo">258</span> if (value < (1 << 1 * 8)) {<a name="line.258"></a> +<span class="sourceLineNo">259</span> return 1;<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<a name="line.260"></a> +<span class="sourceLineNo">261</span> return 2;<a name="line.261"></a> +<span class="sourceLineNo">262</span> }<a name="line.262"></a> +<span class="sourceLineNo">263</span> if (value <= (1 << 3 * 8)) {<a name="line.263"></a> +<span class="sourceLineNo">264</span> return 3;<a name="line.264"></a> +<span class="sourceLineNo">265</span> }<a name="line.265"></a> +<span class="sourceLineNo">266</span> return 4;<a name="line.266"></a> +<span class="sourceLineNo">267</span> }<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> * Read integer from stream coded in 7 bits and increment position.<a name="line.270"></a> +<span class="sourceLineNo">271</span> * @return the integer that has been read<a name="line.271"></a> +<span class="sourceLineNo">272</span> * @throws IOException<a name="line.272"></a> +<span class="sourceLineNo">273</span> */<a name="line.273"></a> +<span class="sourceLineNo">274</span> public static int readCompressedInt(InputStream input)<a name="line.274"></a> +<span class="sourceLineNo">275</span> throws IOException {<a name="line.275"></a> +<span class="sourceLineNo">276</span> int result = 0;<a name="line.276"></a> +<span class="sourceLineNo">277</span> int i = 0;<a name="line.277"></a> +<span class="sourceLineNo">278</span> byte b;<a name="line.278"></a> +<span class="sourceLineNo">279</span> do {<a name="line.279"></a> +<span class="sourceLineNo">280</span> b = (byte) input.read();<a name="line.280"></a> +<span class="sourceLineNo">281</span> result += (b & VALUE_MASK) << (NEXT_BIT_SHIFT * i);<a name="line.281"></a> +<span class="sourceLineNo">282</span> i++;<a name="line.282"></a> +<span class="sourceLineNo">283</span> if (i > Bytes.SIZEOF_INT + 1) {<a name="line.283"></a> +<span class="sourceLineNo">284</span> throw new IllegalStateException(<a name="line.284"></a> +<span class="sourceLineNo">285</span> "Corrupted compressed int (too long: " + (i + 1) + " bytes)");<a name="line.285"></a> +<span class="sourceLineNo">286</span> }<a name="line.286"></a> +<span class="sourceLineNo">287</span> } while (0 != (b & NEXT_BIT_MASK));<a name="line.287"></a> +<span class="sourceLineNo">288</span> return result;<a name="line.288"></a> +<span class="sourceLineNo">289</span> }<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> * Read integer from buffer coded in 7 bits and increment position.<a name="line.292"></a> +<span class="sourceLineNo">293</span> * @return Read integer.<a name="line.293"></a> +<span class="sourceLineNo">294</span> */<a name="line.294"></a> +<span class="sourceLineNo">295</span> public static int readCompressedInt(ByteBuffer buffer) {<a name="line.295"></a> +<span class="sourceLineNo">296</span> byte b = buffer.get();<a name="line.296"></a> +<span class="sourceLineNo">297</span> if ((b & NEXT_BIT_MASK) != 0) {<a name="line.297"></a> +<span class="sourceLineNo">298</span> return (b & VALUE_MASK) + (readCompressedInt(buffer) << NEXT_BIT_SHIFT);<a name="line.298"></a> +<span class="sourceLineNo">299</span> }<a name="line.299"></a> +<span class="sourceLineNo">300</span> return b & VALUE_MASK;<a name="line.300"></a> +<span class="sourceLineNo">301</span> }<a name="line.301"></a> +<span class="sourceLineNo">302</span><a name="line.302"></a> +<span class="sourceLineNo">303</span> /**<a name="line.303"></a> +<span class="sourceLineNo">304</span> * Read long which was written to fitInBytes bytes and increment position.<a name="line.304"></a> +<span class="sourceLineNo">305</span> * @param fitInBytes In how many bytes given long is stored.<a name="line.305"></a> +<span class="sourceLineNo">306</span> * @return The value of parsed long.<a name="line.306"></a> +<span class="sourceLineNo">307</span> * @throws IOException<a name="line.307"></a> +<span class="sourceLineNo">308</span> */<a name="line.308"></a> +<span class="sourceLineNo">309</span> public static long readLong(InputStream in, final int fitInBytes)<a name="line.309"></a> +<span class="sourceLineNo">310</span> throws IOException {<a name="line.310"></a> +<span class="sourceLineNo">311</span> long tmpLong = 0;<a name="line.311"></a> +<span class="sourceLineNo">312</span> for (int i = 0; i < fitInBytes; ++i) {<a name="line.312"></a> +<span class="sourceLineNo">313</span> tmpLong |= (in.read() & 0xffl) << (8 * i);<a name="line.313"></a> +<span class="sourceLineNo">314</span> }<a name="line.314"></a> +<span class="sourceLineNo">315</span> return tmpLong;<a name="line.315"></a> +<span class="sourceLineNo">316</span> }<a name="line.316"></a> +<span class="sourceLineNo">317</span><a name="line.317"></a> +<span class="sourceLineNo">318</span> /**<a name="line.318"></a> +<span class="sourceLineNo">319</span> * Read long which was written to fitInBytes bytes and increment position.<a name="line.319"></a> +<span class="sourceLineNo">320</span> * @param fitInBytes In how many bytes given long is stored.<a name="line.320"></a> +<span class="sourceLineNo">321</span> * @return The value of parsed long.<a name="line.321"></a> +<span class="sourceLineNo">322</span> */<a name="line.322"></a> +<span class="sourceLineNo">323</span> public static long readLong(ByteBuffer in, final int fitInBytes) {<a name="line.323"></a> +<span class="sourceLineNo">324</span> long tmpLength = 0;<a name="line.324"></a> +<span class="sourceLineNo">325</span> for (int i = 0; i < fitInBytes; ++i) {<a name="line.325"></a> +<span class="sourceLineNo">326</span> tmpLength |= (in.get() & 0xffl) << (8l * i);<a name="line.326"></a> +<span class="sourceLineNo">327</span> }<a name="line.327"></a> +<span class="sourceLineNo">328</span> return tmpLength;<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> /**<a name="line.331"></a> +<span class="sourceLineNo">332</span> * Copy the given number of bytes from the given stream and put it at the<a name="line.332"></a> +<span class="sourceLineNo">333</span> * current position of the given buffer, updating the position in the buffer.<a name="line.333"></a> +<span class="sourceLineNo">334</span> * @param out the buffer to write data to<a name="line.334"></a> +<span class="sourceLineNo">335</span> * @param in the stream to read data from<a name="line.335"></a> +<span class="sourceLineNo">336</span> * @param length the number of bytes to read/write<a name="line.336"></a> +<span class="sourceLineNo">337</span> */<a name="line.337"></a> +<span class="sourceLineNo">338</span> public static void copyFromStreamToBuffer(ByteBuffer out,<a name="line.338"></a> +<span class="sourceLineNo">339</span> DataInputStream in, int length) throws IOException {<a name="line.339"></a> +<span class="sourceLineNo">340</span> if (out.hasArray()) {<a name="line.340"></a> +<span class="sourceLineNo">341</span> in.readFully(out.array(), out.position() + out.arrayOffset(),<a name="line.341"></a> +<span class="sourceLineNo">342</span> length);<a name="line.342"></a> +<span class="sourceLineNo">343</span> skip(out, length);<a name="line.343"></a> +<span class="sourceLineNo">344</span> } else {<a name="line.344"></a> +<span class="sourceLineNo">345</span> for (int i = 0; i < length; ++i) {<a name="line.345"></a> +<span class="sourceLineNo">346</span> out.put(in.readByte());<a name="line.346"></a> +<span class="sourceLineNo">347</span> }<a name="line.347"></a> +<span class="sourceLineNo">348</span> }<a name="line.348"></a> +<span class="sourceLineNo">349</span> }<a name="line.349"></a> +<span class="sourceLineNo">350</span><a name="line.350"></a> +<span class="sourceLineNo">351</span> /**<a name="line.351"></a> +<span class="sourceLineNo">352</span> * Copy from the InputStream to a new heap ByteBuffer until the InputStream is exhausted.<a name="line.352"></a> +<span class="sourceLineNo">353</span> */<a name="line.353"></a> +<span class="sourceLineNo">354</span> public static ByteBuffer drainInputStreamToBuffer(InputStream is) throws IOException {<a name="line.354"></a> +<span class="sourceLineNo">355</span> ByteArrayOutputStream baos = new ByteArrayOutputStream(4096);<a name="line.355"></a> +<span class="sourceLineNo">356</span> IOUtils.copyBytes(is, baos, 4096, true);<a name="line.356"></a> +<span class="sourceLineNo">357</span> ByteBuffer buffer = ByteBuffer.wrap(baos.toByteArray());<a name="line.357"></a> +<span class="sourceLineNo">358</span> buffer.rewind();<a name="line.358"></a> +<span class="sourceLineNo">359</span> return buffer;<a name="line.359"></a> +<span class="sourceLineNo">360</span> }<a name="line.360"></a> +<span class="sourceLineNo">361</span><a name="line.361"></a> +<span class="sourceLineNo">362</span> /**<a name="line.362"></a> +<span class="sourceLineNo">363</span> * Copy one buffer's whole data to another. Write starts at the current position of 'out' buffer.<a name="line.363"></a> +<span class="sourceLineNo">364</span> * Note : This will advance the position marker of {@code out} but not change the position maker<a name="line.364"></a> +<span class="sourceLineNo">365</span> * for {@code in}. The position and limit of the {@code in} buffer to be set properly by caller.<a name="line.365"></a> +<span class="sourceLineNo">366</span> * @param in source buffer<a name="line.366"></a> +<span class="sourceLineNo">367</span> * @param out destination buffer<a name="line.367"></a> +<span class="sourceLineNo">368</span> */<a name="line.368"></a> +<span class="sourceLineNo">369</span> public static void copyFromBufferToBuffer(ByteBuffer in, ByteBuffer out) {<a name="line.369"></a> +<span class="sourceLineNo">370</span> if (UnsafeAccess.isAvailable()) {<a name="line.370"></a> +<span class="sourceLineNo">371</span> int length = in.remaining();<a name="line.371"></a> +<span class="sourceLineNo">372</span> UnsafeAccess.copy(in, in.position(), out, out.position(), length);<a name="line.372"></a> +<span class="sourceLineNo">373</span> out.position(out.position() + length);<a name="line.373"></a> +<span class="sourceLineNo">374</span> } else {<a name="line.374"></a> +<span class="sourceLineNo">375</span> out.put(in);<a name="line.375"></a> +<span class="sourceLineNo">376</span> }<a name="line.376"></a> +<span class="sourceLineNo">377</span> }<a name="line.377"></a> +<span class="sourceLineNo">378</span><a name="line.378"></a> +<span class="sourceLineNo">379</span> /**<a name="line.379"></a> +<span class="sourceLineNo">380</span> * Copy from one buffer to another from given offset. This will be absolute positional copying and<a name="line.380"></a> +<span class="sourceLineNo">381</span> * won't affect the position of any of the buffers.<a name="line.381"></a> +<span class="sourceLineNo">382</span> * @param in<a name="line.382"></a> +<span class="sourceLineNo">383</span> * @param out<a name="line.383"></a> +<span class="sourceLineNo">384</span> * @param sourceOffset<a name="line.384"></a> +<span class="sourceLineNo">385</span> * @param destinationOffset<a name="line.385"></a> +<span class="sourceLineNo">386</span> * @param length<a name="line.386"></a> +<span class="sourceLineNo">387</span> */<a name="line.387"></a> +<span class="sourceLineNo">388</span> public static int copyFromBufferToBuffer(ByteBuffer in, ByteBuffer out, int sourceOffset,<a name="line.388"></a> +<span class="sourceLineNo">389</span> int destinationOffset, int length) {<a name="line.389"></a> +<span class="sourceLineNo">390</span> if (in.hasArray() && out.hasArray()) {<a name="line.390"></a> 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out.put(inDup);<a name="line.400"></a> +<span class="sourceLineNo">401</span> out.position(outOldPos);<a name="line.401"></a> +<span class="sourceLineNo">402</span> }<a name="line.402"></a> +<span class="sourceLineNo">403</span> return destinationOffset + length;<a name="line.403"></a> +<span class="sourceLineNo">404</span> }<a name="line.404"></a> +<span class="sourceLineNo">405</span><a name="line.405"></a> +<span class="sourceLineNo">406</span> /**<a name="line.406"></a> +<span class="sourceLineNo">407</span> * Copy from one buffer to another from given offset.<a name="line.407"></a> +<span class="sourceLineNo">408</span> * <p><a name="line.408"></a> +<span class="sourceLineNo">409</span> * Note : This will advance the position marker of {@code out} but not change the position maker<a name="line.409"></a> +<span class="sourceLineNo">410</span> * for {@code in}<a name="line.410"></a> +<span class="sourceLineNo">411</span> * @param in source buffer<a name="line.411"></a> +<span class="sourceLineNo">412</span> * @param out destination buffer<a name="line.412"></a> +<span class="sourceLineNo">413</span> * @param sourceOffset offset in the source buffer<a name="line.413"></a> +<span class="sourceLineNo">414</span> * @param length how many bytes to copy<a name="line.414"></a> +<span class="sourceLineNo">415</span> */<a name="line.415"></a> +<span class="sourceLineNo">416</span> public static void copyFromBufferToBuffer(ByteBuffer in,<a name="line.416"></a> +<span class="sourceLineNo">417</span> ByteBuffer out, int sourceOffset, int length) {<a name="line.417"></a> +<span class="sourceLineNo">418</span> if (in.hasArray() && out.hasArray()) {<a name="line.418"></a> +<span class="sourceLineNo">419</span> System.arraycopy(in.array(), sourceOffset + in.arrayOffset(), out.array(), out.position()<a name="line.419"></a> +<span class="sourceLineNo">420</span> + out.arrayOffset(), length);<a name="line.420"></a> +<span class="sourceLineNo">421</span> skip(out, length);<a name="line.421"></a> +<span class="sourceLineNo">422</span> } else if (UNSAFE_AVAIL) {<a name="line.422"></a> +<span class="sourceLineNo">423</span> UnsafeAccess.copy(in, sourceOffset, out, out.position(), length);<a name="line.423"></a> +<span class="sourceLineNo">424</span> skip(out, length);<a name="line.424"></a> +<span class="sourceLineNo">425</span> } else {<a name="line.425"></a> +<span class="sourceLineNo">426</span> ByteBuffer inDup = in.duplicate();<a name="line.426"></a> +<span class="sourceLineNo">427</span> inDup.position(sourceOffset).limit(sourceOffset + length);<a name="line.427"></a> +<span class="sourceLineNo">428</span> out.put(inDup);<a name="line.428"></a> +<span class="sourceLineNo">429</span> }<a name="line.429"></a> +<span class="sourceLineNo">430</span> }<a name="line.430"></a> +<span class="sourceLineNo">431</span><a name="line.431"></a> +<span class="sourceLineNo">432</span> /**<a name="line.432"></a> +<span class="sourceLineNo">433</span> * Find length of common prefix of two parts in the buffer<a name="line.433"></a> +<span class="sourceLineNo">434</span> * @param buffer Where parts are located.<a name="line.434"></a> +<span class="sourceLineNo">435</span> * @param offsetLeft Offset of the first part.<a name="line.435"></a> +<span class="sourceLineNo">436</span> * @param offsetRight Offset of the second part.<a name="line.436"></a> +<span class="sourceLineNo">437</span> * @param limit Maximal length of common prefix.<a name="line.437"></a> +<span class="sourceLineNo">438</span> * @return Length of prefix.<a name="line.438"></a> +<span class="sourceLineNo">439</span> */<a name="line.439"></a> +<span class="sourceLineNo">440</span> public static int findCommonPrefix(ByteBuffer buffer, int offsetLeft,<a name="line.440"></a> +<span class="sourceLineNo">441</span> int offsetRight, int limit) {<a name="line.441"></a> +<span class="sourceLineNo">442</span> int prefix = 0;<a name="line.442"></a> +<span class="sourceLineNo">443</span><a name="line.443"></a> +<span class="sourceLineNo">444</span> for (; prefix < limit; ++prefix) {<a name="line.444"></a> +<span class="sourceLineNo">445</span> if (buffer.get(offsetLeft + prefix) != buffer.get(offsetRight + prefix)) {<a name="line.445"></a> +<span class="sourceLineNo">446</span> break;<a name="line.446"></a> +<span class="sourceLineNo">447</span> }<a name="line.447"></a> +<span class="sourceLineNo">448</span> }<a name="line.448"></a> +<span class="sourceLineNo">449</span><a name="line.449"></a> +<span class="sourceLineNo">450</span> return prefix;<a name="line.450"></a> +<span class="sourceLineNo">451</span> }<a name="line.451"></a> +<span class="sourceLineNo">452</span><a name="line.452"></a> +<span class="sourceLineNo">453</span> /**<a name="line.453"></a> +<span class="sourceLineNo">454</span> * Find length of common prefix in two arrays.<a name="line.454"></a> +<span class="sourceLineNo">455</span> * @param left Array to be compared.<a name="line.455"></a> +<span class="sourceLineNo">456</span> * @param leftOffset Offset in left array.<a name="line.456"></a> +<span class="sourceLineNo">457</span> * @param leftLength Length of left array.<a name="line.457"></a> +<span class="sourceLineNo">458</span> * @param right Array to be compared.<a name="line.458"></a> +<span class="sourceLineNo">459</span> * @param rightOffset Offset in right array.<a name="line.459"></a> +<span class="sourceLineNo">460</span> * @param rightLength Length of right array.<a name="line.460"></a> +<span class="sourceLineNo">461</span> */<a name="line.461"></a> +<span class="sourceLineNo">462</span> public static int findCommonPrefix(<a name="line.462"></a> +<span class="sourceLineNo">463</span> byte[] left, int leftOffset, int leftLength,<a name="line.463"></a> +<span class="sourceLineNo">464</span> byte[] right, int rightOffset, int rightLength) {<a name="line.464"></a> +<span class="sourceLineNo">465</span> int length = Math.min(leftLength, rightLength);<a name="line.465"></a> +<span class="sourceLineNo">466</span> int result = 0;<a name="line.466"></a> +<span class="sourceLineNo">467</span><a name="line.467"></a> +<span class="sourceLineNo">468</span> while (result < length &&<a name="line.468"></a> +<span class="sourceLineNo">469</span> left[leftOffset + result] == right[rightOffset + result]) {<a name="line.469"></a> +<span class="sourceLineNo">470</span> result++;<a name="line.470"></a> +<span class="sourceLineNo">471</span> }<a name="line.471"></a> +<span class="sourceLineNo">472</span><a name="line.472"></a> +<span class="sourceLineNo">473</span> return result;<a name="line.473"></a> +<span class="sourceLineNo">474</span> }<a name="line.474"></a> +<span class="sourceLineNo">475</span><a name="line.475"></a> +<span class="sourceLineNo">476</span> /**<a name="line.476"></a> +<span class="sourceLineNo">477</span> * Find length of common prefix in two arrays.<a name="line.477"></a> +<span class="sourceLineNo">478</span> * @param left ByteBuffer to be compared.<a name="line.478"></a> +<span class="sourceLineNo">479</span> * @param leftOffset Offset in left ByteBuffer.<a name="line.479"></a> +<span class="sourceLineNo">480</span> * @param leftLength Length of left ByteBuffer.<a name="line.480"></a> +<span class="sourceLineNo">481</span> * @param right ByteBuffer to be compared.<a name="line.481"></a> +<span class="sourceLineNo">482</span> * @param rightOffset Offset in right ByteBuffer.<a name="line.482"></a> +<span class="sourceLineNo">483</span> * @param rightLength Length of right ByteBuffer.<a name="line.483"></a> +<span class="sourceLineNo">484</span> */<a name="line.484"></a> +<span class="sourceLineNo">485</span> public static int findCommonPrefix(ByteBuffer left, int leftOffset, int leftLength,<a name="line.485"></a> +<span class="sourceLineNo">486</span> ByteBuffer right, int rightOffset, int rightLength) {<a name="line.486"></a> +<span class="sourceLineNo">487</span> int length = Math.min(leftLength, rightLength);<a name="line.487"></a> +<span class="sourceLineNo">488</span> int result = 0;<a name="line.488"></a> +<span class="sourceLineNo">489</span><a name="line.489"></a> +<span class="sourceLineNo">490</span> while (result < length && ByteBufferUtils.toByte(left, leftOffset + result) == ByteBufferUtils<a name="line.490"></a> +<span class="sourceLineNo">491</span> .toByte(right, rightOffset + result)) {<a name="line.491"></a> +<span class="sourceLineNo">492</span> result++;<a name="line.492"></a> +<span class="sourceLineNo">493</span> }<a name="line.493"></a> +<span class="sourceLineNo">494</span><a name="line.494"></a> +<span class="sourceLineNo">495</span> return result;<a name="line.495"></a> +<span class="sourceLineNo">496</span> }<a name="line.496"></a> +<span class="sourceLineNo">497</span><a name="line.497"></a> +<span class="sourceLineNo">498</span> /**<a name="line.498"></a> +<span class="sourceLineNo">499</span> * Check whether two parts in the same buffer are equal.<a name="line.499"></a> +<span class="sourceLineNo">500</span> * @param buffer In which buffer there are parts<a name="line.500"></a> +<span class="sourceLineNo">501</span> * @param offsetLeft Beginning of first part.<a name="line.501"></a> +<span class="sourceLineNo">502</span> * @param lengthLeft Length of the first part.<a name="line.502"></a> +<span class="sourceLineNo">503</span> * @param offsetRight Beginning of the second part.<a name="line.503"></a> +<span class="sourceLineNo">504</span> * @param lengthRight Length of the second part.<a name="line.504"></a> +<span class="sourceLineNo">505</span> * @return True if equal<a name="line.505"></a> +<span class="sourceLineNo">506</span> */<a name="line.506"></a> +<span class="sourceLineNo">507</span> public static boolean arePartsEqual(ByteBuffer buffer,<a name="line.507"></a> +<span class="sourceLineNo">508</span> int offsetLeft, int lengthLeft,<a name="line.508"></a> +<span class="sourceLineNo">509</span> int offsetRight, int lengthRight) {<a name="line.509"></a> +<span class="sourceLineNo">510</span> if (lengthLeft != lengthRight) {<a name="line.510"></a> +<span class="sourceLineNo">511</span> return false;<a name="line.511"></a> +<span class="sourceLineNo">512</span> }<a name="line.512"></a> +<span class="sourceLineNo">513</span><a name="line.513"></a> +<span class="sourceLineNo">514</span> if (buffer.hasArray()) {<a name="line.514"></a> +<span class="sourceLineNo">515</span> return 0 == Bytes.compareTo(<a name="line.515"></a> +<span class="sourceLineNo">516</span> buffer.array(), buffer.arrayOffset() + offsetLeft, lengthLeft,<a name="line.516"></a> +<span class="sourceLineNo">517</span> buffer.array(), buffer.arrayOffset() + offsetRight, lengthRight);<a name="line.517"></a> +<span class="sourceLineNo">518</span> }<a name="line.518"></a> +<span class="sourceLineNo">519</span><a name="line.519"></a> +<span class="sourceLineNo">520</span> for (int i = 0; i < lengthRight; ++i) {<a name="line.520"></a> +<span class="sourceLineNo">521</span> if (buffer.get(offsetLeft + i) != buffer.get(offsetRight + i)) {<a name="line.521"></a> +<span class="sourceLineNo">522</span> return false;<a name="line.522"></a> +<span class="sourceLineNo">523</span> }<a name="line.523"></a> +<span class="sourceLineNo">524</span> }<a name="line.524"></a> +<span class="sourceLineNo">525</span> return true;<a name="line.525"></a> +<span class="sourceLineNo">526</span> }<a name="line.526"></a> +<span class="sourceLineNo">527</span><a name="line.527"></a> +<span class="sourceLineNo">528</span> /**<a name="line.528"></a> +<span class="sourceLineNo">529</span> * Increment position in buffer.<a name="line.529"></a> +<span class="sourceLineNo">530</span> * @param buffer In this buffer.<a name="line.530"></a> +<span class="sourceLineNo">531</span> * @param length By that many bytes.<a name="line.531"></a> +<span class="sourceLineNo">532</span> */<a name="line.532"></a> +<span class="sourceLineNo">533</span> public static void skip(ByteBuffer buffer, int length) {<a name="line.533"></a> +<span class="sourceLineNo">534</span> buffer.position(buffer.position() + length);<a name="line.534"></a> <span class="sourceLineNo">535</span> }<a name="line.535">
<TRUNCATED>
