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From bode...@apache.org
Subject svn commit: r1006212 [14/16] - in /websites/production/commons/content/proper/commons-compress: ./ apidocs/org/apache/commons/compress/compressors/lz4/ apidocs/org/apache/commons/compress/compressors/snappy/ apidocs/src-html/org/apache/commons/compress...
Date Sat, 04 Feb 2017 16:19:38 GMT
Modified: websites/production/commons/content/proper/commons-compress/xref/org/apache/commons/compress/compressors/lz4/FramedLZ4CompressorInputStream.html
==============================================================================
--- websites/production/commons/content/proper/commons-compress/xref/org/apache/commons/compress/compressors/lz4/FramedLZ4CompressorInputStream.html (original)
+++ websites/production/commons/content/proper/commons-compress/xref/org/apache/commons/compress/compressors/lz4/FramedLZ4CompressorInputStream.html Sat Feb  4 16:19:37 2017
@@ -28,263 +28,262 @@
 <a class="jxr_linenumber" name="L20" href="#L20">20</a>  
 <a class="jxr_linenumber" name="L21" href="#L21">21</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
 <a class="jxr_linenumber" name="L22" href="#L22">22</a>  <strong class="jxr_keyword">import</strong> java.io.InputStream;
-<a class="jxr_linenumber" name="L23" href="#L23">23</a>  <strong class="jxr_keyword">import</strong> java.io.PushbackInputStream;
-<a class="jxr_linenumber" name="L24" href="#L24">24</a>  <strong class="jxr_keyword">import</strong> java.util.Arrays;
-<a class="jxr_linenumber" name="L25" href="#L25">25</a>  
-<a class="jxr_linenumber" name="L26" href="#L26">26</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.compressors.CompressorInputStream;
-<a class="jxr_linenumber" name="L27" href="#L27">27</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.utils.BoundedInputStream;
-<a class="jxr_linenumber" name="L28" href="#L28">28</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.utils.ByteUtils;
-<a class="jxr_linenumber" name="L29" href="#L29">29</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.utils.IOUtils;
-<a class="jxr_linenumber" name="L30" href="#L30">30</a>  
-<a class="jxr_linenumber" name="L31" href="#L31">31</a>  <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="L32" href="#L32">32</a>  <em class="jxr_javadoccomment"> * CompressorInputStream for the LZ4 frame format.</em>
-<a class="jxr_linenumber" name="L33" href="#L33">33</a>  <em class="jxr_javadoccomment"> *</em>
-<a class="jxr_linenumber" name="L34" href="#L34">34</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;Based on the "spec" in the version "1.5.1 (31/03/2015)"&lt;/p&gt;</em>
-<a class="jxr_linenumber" name="L35" href="#L35">35</a>  <em class="jxr_javadoccomment"> *</em>
-<a class="jxr_linenumber" name="L36" href="#L36">36</a>  <em class="jxr_javadoccomment"> * @see &lt;a href="<a href="http://lz4.github.io/lz4/lz4_Frame_format.html" target="alexandria_uri">http://lz4.github.io/lz4/lz4_Frame_format.html</a>"&gt;LZ4 Frame Format Description&lt;/a&gt;</em>
-<a class="jxr_linenumber" name="L37" href="#L37">37</a>  <em class="jxr_javadoccomment"> * @since 1.14</em>
-<a class="jxr_linenumber" name="L38" href="#L38">38</a>  <em class="jxr_javadoccomment"> * @NotThreadSafe</em>
-<a class="jxr_linenumber" name="L39" href="#L39">39</a>  <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="L40" href="#L40">40</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/FramedLZ4CompressorInputStream.html">FramedLZ4CompressorInputStream</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html">CompressorInputStream</a> {
-<a class="jxr_linenumber" name="L41" href="#L41">41</a>      <em class="jxr_comment">/*</em>
-<a class="jxr_linenumber" name="L42" href="#L42">42</a>  <em class="jxr_comment">     * TODO before releasing 1.14:</em>
-<a class="jxr_linenumber" name="L43" href="#L43">43</a>  <em class="jxr_comment">     *</em>
-<a class="jxr_linenumber" name="L44" href="#L44">44</a>  <em class="jxr_comment">     * + xxhash32 checksum validation</em>
-<a class="jxr_linenumber" name="L45" href="#L45">45</a>  <em class="jxr_comment">     * + skippable frames</em>
-<a class="jxr_linenumber" name="L46" href="#L46">46</a>  <em class="jxr_comment">     * + decompressConcatenated</em>
-<a class="jxr_linenumber" name="L47" href="#L47">47</a>  <em class="jxr_comment">     * + block dependence</em>
-<a class="jxr_linenumber" name="L48" href="#L48">48</a>  <em class="jxr_comment">     */</em>
-<a class="jxr_linenumber" name="L49" href="#L49">49</a>  
-<a class="jxr_linenumber" name="L50" href="#L50">50</a>      <em class="jxr_comment">// used by FramedLZ4CompressorOutputStream as well</em>
-<a class="jxr_linenumber" name="L51" href="#L51">51</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte[] LZ4_SIGNATURE = <strong class="jxr_keyword">new</strong> byte[] { <em class="jxr_comment">//NOSONAR</em>
-<a class="jxr_linenumber" name="L52" href="#L52">52</a>          4, 0x22, 0x4d, 0x18
-<a class="jxr_linenumber" name="L53" href="#L53">53</a>      };
-<a class="jxr_linenumber" name="L54" href="#L54">54</a>  
-<a class="jxr_linenumber" name="L55" href="#L55">55</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> VERSION_MASK = 0xC0;
-<a class="jxr_linenumber" name="L56" href="#L56">56</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SUPPORTED_VERSION = 0x40;
-<a class="jxr_linenumber" name="L57" href="#L57">57</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCK_INDEPENDENCE_MASK = 0x20;
-<a class="jxr_linenumber" name="L58" href="#L58">58</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCK_CHECKSUM_MASK = 0x10;
-<a class="jxr_linenumber" name="L59" href="#L59">59</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> CONTENT_SIZE_MASK = 0x08;
-<a class="jxr_linenumber" name="L60" href="#L60">60</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> CONTENT_CHECKSUM_MASK = 0x04;
-<a class="jxr_linenumber" name="L61" href="#L61">61</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCK_MAX_SIZE_MASK = 0x70;
-<a class="jxr_linenumber" name="L62" href="#L62">62</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> UNCOMPRESSED_FLAG_MASK = 0x80000000;
-<a class="jxr_linenumber" name="L63" href="#L63">63</a>  
-<a class="jxr_linenumber" name="L64" href="#L64">64</a>      <em class="jxr_comment">// used in no-arg read method</em>
-<a class="jxr_linenumber" name="L65" href="#L65">65</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> byte[] oneByte = <strong class="jxr_keyword">new</strong> byte[1];
-<a class="jxr_linenumber" name="L66" href="#L66">66</a>  
-<a class="jxr_linenumber" name="L67" href="#L67">67</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ByteUtils.ByteSupplier supplier = <strong class="jxr_keyword">new</strong> ByteUtils.ByteSupplier() {
-<a class="jxr_linenumber" name="L68" href="#L68">68</a>          @Override
-<a class="jxr_linenumber" name="L69" href="#L69">69</a>          <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getAsByte() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L70" href="#L70">70</a>              <strong class="jxr_keyword">return</strong> readOneByte();
-<a class="jxr_linenumber" name="L71" href="#L71">71</a>          }
-<a class="jxr_linenumber" name="L72" href="#L72">72</a>      };
-<a class="jxr_linenumber" name="L73" href="#L73">73</a>  
-<a class="jxr_linenumber" name="L74" href="#L74">74</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> InputStream in;
-<a class="jxr_linenumber" name="L75" href="#L75">75</a>  
-<a class="jxr_linenumber" name="L76" href="#L76">76</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> expectBlockChecksum;
-<a class="jxr_linenumber" name="L77" href="#L77">77</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> expectContentSize;
-<a class="jxr_linenumber" name="L78" href="#L78">78</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> expectContentChecksum;
-<a class="jxr_linenumber" name="L79" href="#L79">79</a>  
-<a class="jxr_linenumber" name="L80" href="#L80">80</a>      <strong class="jxr_keyword">private</strong> InputStream currentBlock;
-<a class="jxr_linenumber" name="L81" href="#L81">81</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> endReached, inUncompressed;
-<a class="jxr_linenumber" name="L82" href="#L82">82</a>  
-<a class="jxr_linenumber" name="L83" href="#L83">83</a>      <em class="jxr_comment">// used for frame header checksum and content checksum, if present</em>
-<a class="jxr_linenumber" name="L84" href="#L84">84</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/XXHash32.html">XXHash32</a> contentHash = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/XXHash32.html">XXHash32</a>();
-<a class="jxr_linenumber" name="L85" href="#L85">85</a>  
-<a class="jxr_linenumber" name="L86" href="#L86">86</a>      <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="L87" href="#L87">87</a>  <em class="jxr_javadoccomment">     * Creates a new input stream that decompresses streams compressed</em>
-<a class="jxr_linenumber" name="L88" href="#L88">88</a>  <em class="jxr_javadoccomment">     * using the LZ4 frame format.</em>
-<a class="jxr_linenumber" name="L89" href="#L89">89</a>  <em class="jxr_javadoccomment">     * @param in  the InputStream from which to read the compressed data</em>
-<a class="jxr_linenumber" name="L90" href="#L90">90</a>  <em class="jxr_javadoccomment">     * @throws IOException if reading fails</em>
-<a class="jxr_linenumber" name="L91" href="#L91">91</a>  <em class="jxr_javadoccomment">     */</em>
-<a class="jxr_linenumber" name="L92" href="#L92">92</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/FramedLZ4CompressorInputStream.html">FramedLZ4CompressorInputStream</a>(InputStream in) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L93" href="#L93">93</a>          <strong class="jxr_keyword">this</strong>.in = in;
-<a class="jxr_linenumber" name="L94" href="#L94">94</a>          readSignature();
-<a class="jxr_linenumber" name="L95" href="#L95">95</a>          readFrameDescriptor();
-<a class="jxr_linenumber" name="L96" href="#L96">96</a>          nextBlock();
-<a class="jxr_linenumber" name="L97" href="#L97">97</a>      }
-<a class="jxr_linenumber" name="L98" href="#L98">98</a>  
-<a class="jxr_linenumber" name="L99" href="#L99">99</a>      <em class="jxr_javadoccomment">/** {@inheritDoc} */</em>
-<a class="jxr_linenumber" name="L100" href="#L100">100</a>     @Override
-<a class="jxr_linenumber" name="L101" href="#L101">101</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> read() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L102" href="#L102">102</a>         <strong class="jxr_keyword">return</strong> read(oneByte, 0, 1) == -1 ? -1 : oneByte[0] &amp; 0xFF;
-<a class="jxr_linenumber" name="L103" href="#L103">103</a>     }
-<a class="jxr_linenumber" name="L104" href="#L104">104</a> 
-<a class="jxr_linenumber" name="L105" href="#L105">105</a>     <em class="jxr_javadoccomment">/** {@inheritDoc} */</em>
-<a class="jxr_linenumber" name="L106" href="#L106">106</a>     @Override
-<a class="jxr_linenumber" name="L107" href="#L107">107</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L108" href="#L108">108</a>         <strong class="jxr_keyword">if</strong> (currentBlock != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="L109" href="#L109">109</a>             currentBlock.close();
-<a class="jxr_linenumber" name="L110" href="#L110">110</a>             currentBlock = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="L111" href="#L111">111</a>         }
-<a class="jxr_linenumber" name="L112" href="#L112">112</a>         in.close();
-<a class="jxr_linenumber" name="L113" href="#L113">113</a>     }
-<a class="jxr_linenumber" name="L114" href="#L114">114</a> 
-<a class="jxr_linenumber" name="L115" href="#L115">115</a>     <em class="jxr_javadoccomment">/** {@inheritDoc} */</em>
-<a class="jxr_linenumber" name="L116" href="#L116">116</a>     @Override
-<a class="jxr_linenumber" name="L117" href="#L117">117</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> read(<strong class="jxr_keyword">final</strong> byte[] b, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> len) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L118" href="#L118">118</a>         <strong class="jxr_keyword">if</strong> (endReached) {
-<a class="jxr_linenumber" name="L119" href="#L119">119</a>             <strong class="jxr_keyword">return</strong> -1;
-<a class="jxr_linenumber" name="L120" href="#L120">120</a>         }
-<a class="jxr_linenumber" name="L121" href="#L121">121</a>         <strong class="jxr_keyword">int</strong> r = readOnce(b, off, len);
-<a class="jxr_linenumber" name="L122" href="#L122">122</a>         <strong class="jxr_keyword">if</strong> (r == -1) {
-<a class="jxr_linenumber" name="L123" href="#L123">123</a>             nextBlock();
-<a class="jxr_linenumber" name="L124" href="#L124">124</a>             <strong class="jxr_keyword">if</strong> (!endReached) {
-<a class="jxr_linenumber" name="L125" href="#L125">125</a>                 r = readOnce(b, off, len);
-<a class="jxr_linenumber" name="L126" href="#L126">126</a>             }
-<a class="jxr_linenumber" name="L127" href="#L127">127</a>         }
-<a class="jxr_linenumber" name="L128" href="#L128">128</a>         <strong class="jxr_keyword">if</strong> (expectContentChecksum &amp;&amp; r != -1) {
-<a class="jxr_linenumber" name="L129" href="#L129">129</a>             contentHash.update(b, off, r);
-<a class="jxr_linenumber" name="L130" href="#L130">130</a>         }
-<a class="jxr_linenumber" name="L131" href="#L131">131</a>         <strong class="jxr_keyword">return</strong> r;
-<a class="jxr_linenumber" name="L132" href="#L132">132</a>     }
-<a class="jxr_linenumber" name="L133" href="#L133">133</a> 
-<a class="jxr_linenumber" name="L134" href="#L134">134</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> readSignature() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L135" href="#L135">135</a>         <strong class="jxr_keyword">final</strong> byte[] b = <strong class="jxr_keyword">new</strong> byte[4];
-<a class="jxr_linenumber" name="L136" href="#L136">136</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> read = IOUtils.readFully(in, b);
-<a class="jxr_linenumber" name="L137" href="#L137">137</a>         count(read);
-<a class="jxr_linenumber" name="L138" href="#L138">138</a>         <strong class="jxr_keyword">if</strong> (4 != read || !matches(b, 4)) {
-<a class="jxr_linenumber" name="L139" href="#L139">139</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Not a LZ4 frame stream"</span>);
-<a class="jxr_linenumber" name="L140" href="#L140">140</a>         }
-<a class="jxr_linenumber" name="L141" href="#L141">141</a>     }
-<a class="jxr_linenumber" name="L142" href="#L142">142</a> 
-<a class="jxr_linenumber" name="L143" href="#L143">143</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> readFrameDescriptor() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L144" href="#L144">144</a>         <strong class="jxr_keyword">int</strong> flags = readOneByte();
-<a class="jxr_linenumber" name="L145" href="#L145">145</a>         <strong class="jxr_keyword">if</strong> (flags == -1) {
-<a class="jxr_linenumber" name="L146" href="#L146">146</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading frame flags"</span>);
-<a class="jxr_linenumber" name="L147" href="#L147">147</a>         }
-<a class="jxr_linenumber" name="L148" href="#L148">148</a>         contentHash.update(flags);
-<a class="jxr_linenumber" name="L149" href="#L149">149</a>         <strong class="jxr_keyword">if</strong> ((flags &amp; VERSION_MASK) != SUPPORTED_VERSION) {
-<a class="jxr_linenumber" name="L150" href="#L150">150</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Unsupported version "</span> + (flags &gt;&gt; 6));
-<a class="jxr_linenumber" name="L151" href="#L151">151</a>         }
-<a class="jxr_linenumber" name="L152" href="#L152">152</a>         <strong class="jxr_keyword">if</strong> ((flags &amp; BLOCK_INDEPENDENCE_MASK) == 0) {
-<a class="jxr_linenumber" name="L153" href="#L153">153</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Block dependence is not supported"</span>);
-<a class="jxr_linenumber" name="L154" href="#L154">154</a>         }
-<a class="jxr_linenumber" name="L155" href="#L155">155</a>         expectBlockChecksum = (flags &amp; BLOCK_CHECKSUM_MASK) != 0;
-<a class="jxr_linenumber" name="L156" href="#L156">156</a>         expectContentSize = (flags &amp; CONTENT_SIZE_MASK) != 0;
-<a class="jxr_linenumber" name="L157" href="#L157">157</a>         expectContentChecksum = (flags &amp; CONTENT_CHECKSUM_MASK) != 0;
-<a class="jxr_linenumber" name="L158" href="#L158">158</a>         <strong class="jxr_keyword">int</strong> bdByte = readOneByte();
-<a class="jxr_linenumber" name="L159" href="#L159">159</a>         <strong class="jxr_keyword">if</strong> (bdByte == -1) { <em class="jxr_comment">// max size is irrelevant for this implementation</em>
-<a class="jxr_linenumber" name="L160" href="#L160">160</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading frame BD byte"</span>);
-<a class="jxr_linenumber" name="L161" href="#L161">161</a>         }
-<a class="jxr_linenumber" name="L162" href="#L162">162</a>         contentHash.update(bdByte);
-<a class="jxr_linenumber" name="L163" href="#L163">163</a>         <strong class="jxr_keyword">if</strong> (expectContentSize) { <em class="jxr_comment">// for now we don't care, contains the uncompressed size</em>
-<a class="jxr_linenumber" name="L164" href="#L164">164</a>             byte[] contentSize = <strong class="jxr_keyword">new</strong> byte[8];
-<a class="jxr_linenumber" name="L165" href="#L165">165</a>             <strong class="jxr_keyword">int</strong> skipped = (<strong class="jxr_keyword">int</strong>) IOUtils.readFully(in, contentSize);
-<a class="jxr_linenumber" name="L166" href="#L166">166</a>             count(skipped);
-<a class="jxr_linenumber" name="L167" href="#L167">167</a>             <strong class="jxr_keyword">if</strong> (8 != skipped) {
-<a class="jxr_linenumber" name="L168" href="#L168">168</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading content size"</span>);
-<a class="jxr_linenumber" name="L169" href="#L169">169</a>             }
-<a class="jxr_linenumber" name="L170" href="#L170">170</a>             contentHash.update(contentSize, 0, contentSize.length);
-<a class="jxr_linenumber" name="L171" href="#L171">171</a>         }
-<a class="jxr_linenumber" name="L172" href="#L172">172</a>         <strong class="jxr_keyword">int</strong> headerHash = readOneByte();
-<a class="jxr_linenumber" name="L173" href="#L173">173</a>         <strong class="jxr_keyword">if</strong> (headerHash == -1) { <em class="jxr_comment">// partial hash of header.</em>
-<a class="jxr_linenumber" name="L174" href="#L174">174</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading frame header checksum"</span>);
-<a class="jxr_linenumber" name="L175" href="#L175">175</a>         }
-<a class="jxr_linenumber" name="L176" href="#L176">176</a>         <strong class="jxr_keyword">int</strong> expectedHash = (<strong class="jxr_keyword">int</strong>) ((contentHash.getValue() &gt;&gt; 8) &amp; 0xff);
-<a class="jxr_linenumber" name="L177" href="#L177">177</a>         contentHash.reset();
-<a class="jxr_linenumber" name="L178" href="#L178">178</a>         <strong class="jxr_keyword">if</strong> (headerHash != expectedHash) {
-<a class="jxr_linenumber" name="L179" href="#L179">179</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"frame header checksum mismatch."</span>);
-<a class="jxr_linenumber" name="L180" href="#L180">180</a>         }
-<a class="jxr_linenumber" name="L181" href="#L181">181</a>     }
-<a class="jxr_linenumber" name="L182" href="#L182">182</a> 
-<a class="jxr_linenumber" name="L183" href="#L183">183</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> nextBlock() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L184" href="#L184">184</a>         maybeFinishCurrentBlock();
-<a class="jxr_linenumber" name="L185" href="#L185">185</a>         <strong class="jxr_keyword">long</strong> len = ByteUtils.fromLittleEndian(supplier, 4);
-<a class="jxr_linenumber" name="L186" href="#L186">186</a>         <strong class="jxr_keyword">boolean</strong> uncompressed = (len &amp; UNCOMPRESSED_FLAG_MASK) != 0;
-<a class="jxr_linenumber" name="L187" href="#L187">187</a>         <strong class="jxr_keyword">int</strong> realLen = (<strong class="jxr_keyword">int</strong>) (len &amp; (~UNCOMPRESSED_FLAG_MASK));
-<a class="jxr_linenumber" name="L188" href="#L188">188</a>         <strong class="jxr_keyword">if</strong> (realLen == 0) {
-<a class="jxr_linenumber" name="L189" href="#L189">189</a>             endReached = <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="L190" href="#L190">190</a>             verifyContentChecksum();
-<a class="jxr_linenumber" name="L191" href="#L191">191</a>             <strong class="jxr_keyword">return</strong>;
-<a class="jxr_linenumber" name="L192" href="#L192">192</a>         }
-<a class="jxr_linenumber" name="L193" href="#L193">193</a>         InputStream capped = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/commons/compress/utils/BoundedInputStream.html">BoundedInputStream</a>(in, realLen);
-<a class="jxr_linenumber" name="L194" href="#L194">194</a>         <strong class="jxr_keyword">if</strong> (uncompressed) {
-<a class="jxr_linenumber" name="L195" href="#L195">195</a>             inUncompressed = <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="L196" href="#L196">196</a>             currentBlock = capped;
-<a class="jxr_linenumber" name="L197" href="#L197">197</a>         } <strong class="jxr_keyword">else</strong> {
-<a class="jxr_linenumber" name="L198" href="#L198">198</a>             inUncompressed = false;
-<a class="jxr_linenumber" name="L199" href="#L199">199</a>             currentBlock = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream.html">BlockLZ4CompressorInputStream</a>(capped);
-<a class="jxr_linenumber" name="L200" href="#L200">200</a>         }
-<a class="jxr_linenumber" name="L201" href="#L201">201</a>     }
-<a class="jxr_linenumber" name="L202" href="#L202">202</a> 
-<a class="jxr_linenumber" name="L203" href="#L203">203</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> maybeFinishCurrentBlock() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L204" href="#L204">204</a>         <strong class="jxr_keyword">if</strong> (currentBlock != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="L205" href="#L205">205</a>             currentBlock.close();
-<a class="jxr_linenumber" name="L206" href="#L206">206</a>             currentBlock = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="L207" href="#L207">207</a>             <strong class="jxr_keyword">if</strong> (expectBlockChecksum) {
-<a class="jxr_linenumber" name="L208" href="#L208">208</a>                 <strong class="jxr_keyword">int</strong> skipped = (<strong class="jxr_keyword">int</strong>) IOUtils.skip(in, 4);
-<a class="jxr_linenumber" name="L209" href="#L209">209</a>                 count(skipped);
-<a class="jxr_linenumber" name="L210" href="#L210">210</a>                 <strong class="jxr_keyword">if</strong> (4 != skipped) {
-<a class="jxr_linenumber" name="L211" href="#L211">211</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading block checksum"</span>);
-<a class="jxr_linenumber" name="L212" href="#L212">212</a>                 }
-<a class="jxr_linenumber" name="L213" href="#L213">213</a>             }
-<a class="jxr_linenumber" name="L214" href="#L214">214</a>         }
-<a class="jxr_linenumber" name="L215" href="#L215">215</a>     }
-<a class="jxr_linenumber" name="L216" href="#L216">216</a> 
-<a class="jxr_linenumber" name="L217" href="#L217">217</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> verifyContentChecksum() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L218" href="#L218">218</a>         <strong class="jxr_keyword">if</strong> (expectContentChecksum) {
-<a class="jxr_linenumber" name="L219" href="#L219">219</a>             byte[] checksum = <strong class="jxr_keyword">new</strong> byte[4];
-<a class="jxr_linenumber" name="L220" href="#L220">220</a>             <strong class="jxr_keyword">int</strong> read = IOUtils.readFully(in, checksum);
-<a class="jxr_linenumber" name="L221" href="#L221">221</a>             count(read);
-<a class="jxr_linenumber" name="L222" href="#L222">222</a>             <strong class="jxr_keyword">if</strong> (4 != read) {
-<a class="jxr_linenumber" name="L223" href="#L223">223</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading content checksum"</span>);
-<a class="jxr_linenumber" name="L224" href="#L224">224</a>             }
-<a class="jxr_linenumber" name="L225" href="#L225">225</a>             <strong class="jxr_keyword">long</strong> expectedHash = contentHash.getValue();
-<a class="jxr_linenumber" name="L226" href="#L226">226</a>             <strong class="jxr_keyword">if</strong> (expectedHash != ByteUtils.fromLittleEndian(checksum)) {
-<a class="jxr_linenumber" name="L227" href="#L227">227</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"content checksum mismatch."</span>);
-<a class="jxr_linenumber" name="L228" href="#L228">228</a>             }
-<a class="jxr_linenumber" name="L229" href="#L229">229</a>             contentHash.reset();
-<a class="jxr_linenumber" name="L230" href="#L230">230</a>         }
-<a class="jxr_linenumber" name="L231" href="#L231">231</a>     }
-<a class="jxr_linenumber" name="L232" href="#L232">232</a> 
-<a class="jxr_linenumber" name="L233" href="#L233">233</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> readOneByte() <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L234" href="#L234">234</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> b = in.read();
-<a class="jxr_linenumber" name="L235" href="#L235">235</a>         <strong class="jxr_keyword">if</strong> (b != -1) {
-<a class="jxr_linenumber" name="L236" href="#L236">236</a>             count(1);
-<a class="jxr_linenumber" name="L237" href="#L237">237</a>             <strong class="jxr_keyword">return</strong> b &amp; 0xFF;
-<a class="jxr_linenumber" name="L238" href="#L238">238</a>         }
-<a class="jxr_linenumber" name="L239" href="#L239">239</a>         <strong class="jxr_keyword">return</strong> -1;
-<a class="jxr_linenumber" name="L240" href="#L240">240</a>     }
-<a class="jxr_linenumber" name="L241" href="#L241">241</a> 
-<a class="jxr_linenumber" name="L242" href="#L242">242</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> readOnce(byte[] b, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="L243" href="#L243">243</a>         <strong class="jxr_keyword">if</strong> (inUncompressed) {
-<a class="jxr_linenumber" name="L244" href="#L244">244</a>             <strong class="jxr_keyword">int</strong> cnt = currentBlock.read(b, off, len);
-<a class="jxr_linenumber" name="L245" href="#L245">245</a>             count(cnt);
-<a class="jxr_linenumber" name="L246" href="#L246">246</a>             <strong class="jxr_keyword">return</strong> cnt;
-<a class="jxr_linenumber" name="L247" href="#L247">247</a>         } <strong class="jxr_keyword">else</strong> {
-<a class="jxr_linenumber" name="L248" href="#L248">248</a>             <a href="../../../../../../org/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream.html">BlockLZ4CompressorInputStream</a> l = (BlockLZ4CompressorInputStream) currentBlock;
-<a class="jxr_linenumber" name="L249" href="#L249">249</a>             <strong class="jxr_keyword">long</strong> before = l.getBytesRead();
-<a class="jxr_linenumber" name="L250" href="#L250">250</a>             <strong class="jxr_keyword">int</strong> cnt = currentBlock.read(b, off, len);
-<a class="jxr_linenumber" name="L251" href="#L251">251</a>             count(l.getBytesRead() - before);
-<a class="jxr_linenumber" name="L252" href="#L252">252</a>             <strong class="jxr_keyword">return</strong> cnt;
-<a class="jxr_linenumber" name="L253" href="#L253">253</a>         }
-<a class="jxr_linenumber" name="L254" href="#L254">254</a>     }
-<a class="jxr_linenumber" name="L255" href="#L255">255</a> 
-<a class="jxr_linenumber" name="L256" href="#L256">256</a>     <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="L257" href="#L257">257</a> <em class="jxr_javadoccomment">     * Checks if the signature matches what is expected for a .lz4 file.</em>
-<a class="jxr_linenumber" name="L258" href="#L258">258</a> <em class="jxr_javadoccomment">     *</em>
-<a class="jxr_linenumber" name="L259" href="#L259">259</a> <em class="jxr_javadoccomment">     * &lt;p&gt;.lz4 files start with a four byte signature.&lt;/p&gt;</em>
-<a class="jxr_linenumber" name="L260" href="#L260">260</a> <em class="jxr_javadoccomment">     *</em>
-<a class="jxr_linenumber" name="L261" href="#L261">261</a> <em class="jxr_javadoccomment">     * @param signature the bytes to check</em>
-<a class="jxr_linenumber" name="L262" href="#L262">262</a> <em class="jxr_javadoccomment">     * @param length    the number of bytes to check</em>
-<a class="jxr_linenumber" name="L263" href="#L263">263</a> <em class="jxr_javadoccomment">     * @return          true if this is a .sz stream, false otherwise</em>
-<a class="jxr_linenumber" name="L264" href="#L264">264</a> <em class="jxr_javadoccomment">     */</em>
-<a class="jxr_linenumber" name="L265" href="#L265">265</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> matches(<strong class="jxr_keyword">final</strong> byte[] signature, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> length) {
-<a class="jxr_linenumber" name="L266" href="#L266">266</a> 
-<a class="jxr_linenumber" name="L267" href="#L267">267</a>         <strong class="jxr_keyword">if</strong> (length &lt; LZ4_SIGNATURE.length) {
-<a class="jxr_linenumber" name="L268" href="#L268">268</a>             <strong class="jxr_keyword">return</strong> false;
-<a class="jxr_linenumber" name="L269" href="#L269">269</a>         }
-<a class="jxr_linenumber" name="L270" href="#L270">270</a> 
-<a class="jxr_linenumber" name="L271" href="#L271">271</a>         byte[] shortenedSig = signature;
-<a class="jxr_linenumber" name="L272" href="#L272">272</a>         <strong class="jxr_keyword">if</strong> (signature.length &gt; LZ4_SIGNATURE.length) {
-<a class="jxr_linenumber" name="L273" href="#L273">273</a>             shortenedSig = <strong class="jxr_keyword">new</strong> byte[LZ4_SIGNATURE.length];
-<a class="jxr_linenumber" name="L274" href="#L274">274</a>             System.arraycopy(signature, 0, shortenedSig, 0, LZ4_SIGNATURE.length);
-<a class="jxr_linenumber" name="L275" href="#L275">275</a>         }
-<a class="jxr_linenumber" name="L276" href="#L276">276</a> 
-<a class="jxr_linenumber" name="L277" href="#L277">277</a>         <strong class="jxr_keyword">return</strong> Arrays.equals(shortenedSig, LZ4_SIGNATURE);
-<a class="jxr_linenumber" name="L278" href="#L278">278</a>     }
-<a class="jxr_linenumber" name="L279" href="#L279">279</a> }
+<a class="jxr_linenumber" name="L23" href="#L23">23</a>  <strong class="jxr_keyword">import</strong> java.util.Arrays;
+<a class="jxr_linenumber" name="L24" href="#L24">24</a>  
+<a class="jxr_linenumber" name="L25" href="#L25">25</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.compressors.CompressorInputStream;
+<a class="jxr_linenumber" name="L26" href="#L26">26</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.utils.BoundedInputStream;
+<a class="jxr_linenumber" name="L27" href="#L27">27</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.utils.ByteUtils;
+<a class="jxr_linenumber" name="L28" href="#L28">28</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.compress.utils.IOUtils;
+<a class="jxr_linenumber" name="L29" href="#L29">29</a>  
+<a class="jxr_linenumber" name="L30" href="#L30">30</a>  <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="L31" href="#L31">31</a>  <em class="jxr_javadoccomment"> * CompressorInputStream for the LZ4 frame format.</em>
+<a class="jxr_linenumber" name="L32" href="#L32">32</a>  <em class="jxr_javadoccomment"> *</em>
+<a class="jxr_linenumber" name="L33" href="#L33">33</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;Based on the "spec" in the version "1.5.1 (31/03/2015)"&lt;/p&gt;</em>
+<a class="jxr_linenumber" name="L34" href="#L34">34</a>  <em class="jxr_javadoccomment"> *</em>
+<a class="jxr_linenumber" name="L35" href="#L35">35</a>  <em class="jxr_javadoccomment"> * @see &lt;a href="<a href="http://lz4.github.io/lz4/lz4_Frame_format.html" target="alexandria_uri">http://lz4.github.io/lz4/lz4_Frame_format.html</a>"&gt;LZ4 Frame Format Description&lt;/a&gt;</em>
+<a class="jxr_linenumber" name="L36" href="#L36">36</a>  <em class="jxr_javadoccomment"> * @since 1.14</em>
+<a class="jxr_linenumber" name="L37" href="#L37">37</a>  <em class="jxr_javadoccomment"> * @NotThreadSafe</em>
+<a class="jxr_linenumber" name="L38" href="#L38">38</a>  <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="L39" href="#L39">39</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/FramedLZ4CompressorInputStream.html">FramedLZ4CompressorInputStream</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html">CompressorInputStream</a> {
+<a class="jxr_linenumber" name="L40" href="#L40">40</a>      <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="L41" href="#L41">41</a>  <em class="jxr_comment">     * TODO before releasing 1.14:</em>
+<a class="jxr_linenumber" name="L42" href="#L42">42</a>  <em class="jxr_comment">     *</em>
+<a class="jxr_linenumber" name="L43" href="#L43">43</a>  <em class="jxr_comment">     * + xxhash32 checksum validation</em>
+<a class="jxr_linenumber" name="L44" href="#L44">44</a>  <em class="jxr_comment">     * + skippable frames</em>
+<a class="jxr_linenumber" name="L45" href="#L45">45</a>  <em class="jxr_comment">     * + decompressConcatenated</em>
+<a class="jxr_linenumber" name="L46" href="#L46">46</a>  <em class="jxr_comment">     * + block dependence</em>
+<a class="jxr_linenumber" name="L47" href="#L47">47</a>  <em class="jxr_comment">     */</em>
+<a class="jxr_linenumber" name="L48" href="#L48">48</a>  
+<a class="jxr_linenumber" name="L49" href="#L49">49</a>      <em class="jxr_comment">// used by FramedLZ4CompressorOutputStream as well</em>
+<a class="jxr_linenumber" name="L50" href="#L50">50</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte[] LZ4_SIGNATURE = <strong class="jxr_keyword">new</strong> byte[] { <em class="jxr_comment">//NOSONAR</em>
+<a class="jxr_linenumber" name="L51" href="#L51">51</a>          4, 0x22, 0x4d, 0x18
+<a class="jxr_linenumber" name="L52" href="#L52">52</a>      };
+<a class="jxr_linenumber" name="L53" href="#L53">53</a>  
+<a class="jxr_linenumber" name="L54" href="#L54">54</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> VERSION_MASK = 0xC0;
+<a class="jxr_linenumber" name="L55" href="#L55">55</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SUPPORTED_VERSION = 0x40;
+<a class="jxr_linenumber" name="L56" href="#L56">56</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCK_INDEPENDENCE_MASK = 0x20;
+<a class="jxr_linenumber" name="L57" href="#L57">57</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCK_CHECKSUM_MASK = 0x10;
+<a class="jxr_linenumber" name="L58" href="#L58">58</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> CONTENT_SIZE_MASK = 0x08;
+<a class="jxr_linenumber" name="L59" href="#L59">59</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> CONTENT_CHECKSUM_MASK = 0x04;
+<a class="jxr_linenumber" name="L60" href="#L60">60</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BLOCK_MAX_SIZE_MASK = 0x70;
+<a class="jxr_linenumber" name="L61" href="#L61">61</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> UNCOMPRESSED_FLAG_MASK = 0x80000000;
+<a class="jxr_linenumber" name="L62" href="#L62">62</a>  
+<a class="jxr_linenumber" name="L63" href="#L63">63</a>      <em class="jxr_comment">// used in no-arg read method</em>
+<a class="jxr_linenumber" name="L64" href="#L64">64</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> byte[] oneByte = <strong class="jxr_keyword">new</strong> byte[1];
+<a class="jxr_linenumber" name="L65" href="#L65">65</a>  
+<a class="jxr_linenumber" name="L66" href="#L66">66</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ByteUtils.ByteSupplier supplier = <strong class="jxr_keyword">new</strong> ByteUtils.ByteSupplier() {
+<a class="jxr_linenumber" name="L67" href="#L67">67</a>          @Override
+<a class="jxr_linenumber" name="L68" href="#L68">68</a>          <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getAsByte() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L69" href="#L69">69</a>              <strong class="jxr_keyword">return</strong> readOneByte();
+<a class="jxr_linenumber" name="L70" href="#L70">70</a>          }
+<a class="jxr_linenumber" name="L71" href="#L71">71</a>      };
+<a class="jxr_linenumber" name="L72" href="#L72">72</a>  
+<a class="jxr_linenumber" name="L73" href="#L73">73</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> InputStream in;
+<a class="jxr_linenumber" name="L74" href="#L74">74</a>  
+<a class="jxr_linenumber" name="L75" href="#L75">75</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> expectBlockChecksum;
+<a class="jxr_linenumber" name="L76" href="#L76">76</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> expectContentSize;
+<a class="jxr_linenumber" name="L77" href="#L77">77</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> expectContentChecksum;
+<a class="jxr_linenumber" name="L78" href="#L78">78</a>  
+<a class="jxr_linenumber" name="L79" href="#L79">79</a>      <strong class="jxr_keyword">private</strong> InputStream currentBlock;
+<a class="jxr_linenumber" name="L80" href="#L80">80</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> endReached, inUncompressed;
+<a class="jxr_linenumber" name="L81" href="#L81">81</a>  
+<a class="jxr_linenumber" name="L82" href="#L82">82</a>      <em class="jxr_comment">// used for frame header checksum and content checksum, if present</em>
+<a class="jxr_linenumber" name="L83" href="#L83">83</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/XXHash32.html">XXHash32</a> contentHash = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/XXHash32.html">XXHash32</a>();
+<a class="jxr_linenumber" name="L84" href="#L84">84</a>  
+<a class="jxr_linenumber" name="L85" href="#L85">85</a>      <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="L86" href="#L86">86</a>  <em class="jxr_javadoccomment">     * Creates a new input stream that decompresses streams compressed</em>
+<a class="jxr_linenumber" name="L87" href="#L87">87</a>  <em class="jxr_javadoccomment">     * using the LZ4 frame format.</em>
+<a class="jxr_linenumber" name="L88" href="#L88">88</a>  <em class="jxr_javadoccomment">     * @param in  the InputStream from which to read the compressed data</em>
+<a class="jxr_linenumber" name="L89" href="#L89">89</a>  <em class="jxr_javadoccomment">     * @throws IOException if reading fails</em>
+<a class="jxr_linenumber" name="L90" href="#L90">90</a>  <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="L91" href="#L91">91</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/FramedLZ4CompressorInputStream.html">FramedLZ4CompressorInputStream</a>(InputStream in) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L92" href="#L92">92</a>          <strong class="jxr_keyword">this</strong>.in = in;
+<a class="jxr_linenumber" name="L93" href="#L93">93</a>          readSignature();
+<a class="jxr_linenumber" name="L94" href="#L94">94</a>          readFrameDescriptor();
+<a class="jxr_linenumber" name="L95" href="#L95">95</a>          nextBlock();
+<a class="jxr_linenumber" name="L96" href="#L96">96</a>      }
+<a class="jxr_linenumber" name="L97" href="#L97">97</a>  
+<a class="jxr_linenumber" name="L98" href="#L98">98</a>      <em class="jxr_javadoccomment">/** {@inheritDoc} */</em>
+<a class="jxr_linenumber" name="L99" href="#L99">99</a>      @Override
+<a class="jxr_linenumber" name="L100" href="#L100">100</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> read() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L101" href="#L101">101</a>         <strong class="jxr_keyword">return</strong> read(oneByte, 0, 1) == -1 ? -1 : oneByte[0] &amp; 0xFF;
+<a class="jxr_linenumber" name="L102" href="#L102">102</a>     }
+<a class="jxr_linenumber" name="L103" href="#L103">103</a> 
+<a class="jxr_linenumber" name="L104" href="#L104">104</a>     <em class="jxr_javadoccomment">/** {@inheritDoc} */</em>
+<a class="jxr_linenumber" name="L105" href="#L105">105</a>     @Override
+<a class="jxr_linenumber" name="L106" href="#L106">106</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L107" href="#L107">107</a>         <strong class="jxr_keyword">if</strong> (currentBlock != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="L108" href="#L108">108</a>             currentBlock.close();
+<a class="jxr_linenumber" name="L109" href="#L109">109</a>             currentBlock = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="L110" href="#L110">110</a>         }
+<a class="jxr_linenumber" name="L111" href="#L111">111</a>         in.close();
+<a class="jxr_linenumber" name="L112" href="#L112">112</a>     }
+<a class="jxr_linenumber" name="L113" href="#L113">113</a> 
+<a class="jxr_linenumber" name="L114" href="#L114">114</a>     <em class="jxr_javadoccomment">/** {@inheritDoc} */</em>
+<a class="jxr_linenumber" name="L115" href="#L115">115</a>     @Override
+<a class="jxr_linenumber" name="L116" href="#L116">116</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> read(<strong class="jxr_keyword">final</strong> byte[] b, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> len) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L117" href="#L117">117</a>         <strong class="jxr_keyword">if</strong> (endReached) {
+<a class="jxr_linenumber" name="L118" href="#L118">118</a>             <strong class="jxr_keyword">return</strong> -1;
+<a class="jxr_linenumber" name="L119" href="#L119">119</a>         }
+<a class="jxr_linenumber" name="L120" href="#L120">120</a>         <strong class="jxr_keyword">int</strong> r = readOnce(b, off, len);
+<a class="jxr_linenumber" name="L121" href="#L121">121</a>         <strong class="jxr_keyword">if</strong> (r == -1) {
+<a class="jxr_linenumber" name="L122" href="#L122">122</a>             nextBlock();
+<a class="jxr_linenumber" name="L123" href="#L123">123</a>             <strong class="jxr_keyword">if</strong> (!endReached) {
+<a class="jxr_linenumber" name="L124" href="#L124">124</a>                 r = readOnce(b, off, len);
+<a class="jxr_linenumber" name="L125" href="#L125">125</a>             }
+<a class="jxr_linenumber" name="L126" href="#L126">126</a>         }
+<a class="jxr_linenumber" name="L127" href="#L127">127</a>         <strong class="jxr_keyword">if</strong> (expectContentChecksum &amp;&amp; r != -1) {
+<a class="jxr_linenumber" name="L128" href="#L128">128</a>             contentHash.update(b, off, r);
+<a class="jxr_linenumber" name="L129" href="#L129">129</a>         }
+<a class="jxr_linenumber" name="L130" href="#L130">130</a>         <strong class="jxr_keyword">return</strong> r;
+<a class="jxr_linenumber" name="L131" href="#L131">131</a>     }
+<a class="jxr_linenumber" name="L132" href="#L132">132</a> 
+<a class="jxr_linenumber" name="L133" href="#L133">133</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> readSignature() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L134" href="#L134">134</a>         <strong class="jxr_keyword">final</strong> byte[] b = <strong class="jxr_keyword">new</strong> byte[4];
+<a class="jxr_linenumber" name="L135" href="#L135">135</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> read = IOUtils.readFully(in, b);
+<a class="jxr_linenumber" name="L136" href="#L136">136</a>         count(read);
+<a class="jxr_linenumber" name="L137" href="#L137">137</a>         <strong class="jxr_keyword">if</strong> (4 != read || !matches(b, 4)) {
+<a class="jxr_linenumber" name="L138" href="#L138">138</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Not a LZ4 frame stream"</span>);
+<a class="jxr_linenumber" name="L139" href="#L139">139</a>         }
+<a class="jxr_linenumber" name="L140" href="#L140">140</a>     }
+<a class="jxr_linenumber" name="L141" href="#L141">141</a> 
+<a class="jxr_linenumber" name="L142" href="#L142">142</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> readFrameDescriptor() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L143" href="#L143">143</a>         <strong class="jxr_keyword">int</strong> flags = readOneByte();
+<a class="jxr_linenumber" name="L144" href="#L144">144</a>         <strong class="jxr_keyword">if</strong> (flags == -1) {
+<a class="jxr_linenumber" name="L145" href="#L145">145</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading frame flags"</span>);
+<a class="jxr_linenumber" name="L146" href="#L146">146</a>         }
+<a class="jxr_linenumber" name="L147" href="#L147">147</a>         contentHash.update(flags);
+<a class="jxr_linenumber" name="L148" href="#L148">148</a>         <strong class="jxr_keyword">if</strong> ((flags &amp; VERSION_MASK) != SUPPORTED_VERSION) {
+<a class="jxr_linenumber" name="L149" href="#L149">149</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Unsupported version "</span> + (flags &gt;&gt; 6));
+<a class="jxr_linenumber" name="L150" href="#L150">150</a>         }
+<a class="jxr_linenumber" name="L151" href="#L151">151</a>         <strong class="jxr_keyword">if</strong> ((flags &amp; BLOCK_INDEPENDENCE_MASK) == 0) {
+<a class="jxr_linenumber" name="L152" href="#L152">152</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Block dependence is not supported"</span>);
+<a class="jxr_linenumber" name="L153" href="#L153">153</a>         }
+<a class="jxr_linenumber" name="L154" href="#L154">154</a>         expectBlockChecksum = (flags &amp; BLOCK_CHECKSUM_MASK) != 0;
+<a class="jxr_linenumber" name="L155" href="#L155">155</a>         expectContentSize = (flags &amp; CONTENT_SIZE_MASK) != 0;
+<a class="jxr_linenumber" name="L156" href="#L156">156</a>         expectContentChecksum = (flags &amp; CONTENT_CHECKSUM_MASK) != 0;
+<a class="jxr_linenumber" name="L157" href="#L157">157</a>         <strong class="jxr_keyword">int</strong> bdByte = readOneByte();
+<a class="jxr_linenumber" name="L158" href="#L158">158</a>         <strong class="jxr_keyword">if</strong> (bdByte == -1) { <em class="jxr_comment">// max size is irrelevant for this implementation</em>
+<a class="jxr_linenumber" name="L159" href="#L159">159</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading frame BD byte"</span>);
+<a class="jxr_linenumber" name="L160" href="#L160">160</a>         }
+<a class="jxr_linenumber" name="L161" href="#L161">161</a>         contentHash.update(bdByte);
+<a class="jxr_linenumber" name="L162" href="#L162">162</a>         <strong class="jxr_keyword">if</strong> (expectContentSize) { <em class="jxr_comment">// for now we don't care, contains the uncompressed size</em>
+<a class="jxr_linenumber" name="L163" href="#L163">163</a>             byte[] contentSize = <strong class="jxr_keyword">new</strong> byte[8];
+<a class="jxr_linenumber" name="L164" href="#L164">164</a>             <strong class="jxr_keyword">int</strong> skipped = (<strong class="jxr_keyword">int</strong>) IOUtils.readFully(in, contentSize);
+<a class="jxr_linenumber" name="L165" href="#L165">165</a>             count(skipped);
+<a class="jxr_linenumber" name="L166" href="#L166">166</a>             <strong class="jxr_keyword">if</strong> (8 != skipped) {
+<a class="jxr_linenumber" name="L167" href="#L167">167</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading content size"</span>);
+<a class="jxr_linenumber" name="L168" href="#L168">168</a>             }
+<a class="jxr_linenumber" name="L169" href="#L169">169</a>             contentHash.update(contentSize, 0, contentSize.length);
+<a class="jxr_linenumber" name="L170" href="#L170">170</a>         }
+<a class="jxr_linenumber" name="L171" href="#L171">171</a>         <strong class="jxr_keyword">int</strong> headerHash = readOneByte();
+<a class="jxr_linenumber" name="L172" href="#L172">172</a>         <strong class="jxr_keyword">if</strong> (headerHash == -1) { <em class="jxr_comment">// partial hash of header.</em>
+<a class="jxr_linenumber" name="L173" href="#L173">173</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading frame header checksum"</span>);
+<a class="jxr_linenumber" name="L174" href="#L174">174</a>         }
+<a class="jxr_linenumber" name="L175" href="#L175">175</a>         <strong class="jxr_keyword">int</strong> expectedHash = (<strong class="jxr_keyword">int</strong>) ((contentHash.getValue() &gt;&gt; 8) &amp; 0xff);
+<a class="jxr_linenumber" name="L176" href="#L176">176</a>         contentHash.reset();
+<a class="jxr_linenumber" name="L177" href="#L177">177</a>         <strong class="jxr_keyword">if</strong> (headerHash != expectedHash) {
+<a class="jxr_linenumber" name="L178" href="#L178">178</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"frame header checksum mismatch."</span>);
+<a class="jxr_linenumber" name="L179" href="#L179">179</a>         }
+<a class="jxr_linenumber" name="L180" href="#L180">180</a>     }
+<a class="jxr_linenumber" name="L181" href="#L181">181</a> 
+<a class="jxr_linenumber" name="L182" href="#L182">182</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> nextBlock() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L183" href="#L183">183</a>         maybeFinishCurrentBlock();
+<a class="jxr_linenumber" name="L184" href="#L184">184</a>         <strong class="jxr_keyword">long</strong> len = ByteUtils.fromLittleEndian(supplier, 4);
+<a class="jxr_linenumber" name="L185" href="#L185">185</a>         <strong class="jxr_keyword">boolean</strong> uncompressed = (len &amp; UNCOMPRESSED_FLAG_MASK) != 0;
+<a class="jxr_linenumber" name="L186" href="#L186">186</a>         <strong class="jxr_keyword">int</strong> realLen = (<strong class="jxr_keyword">int</strong>) (len &amp; (~UNCOMPRESSED_FLAG_MASK));
+<a class="jxr_linenumber" name="L187" href="#L187">187</a>         <strong class="jxr_keyword">if</strong> (realLen == 0) {
+<a class="jxr_linenumber" name="L188" href="#L188">188</a>             endReached = <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="L189" href="#L189">189</a>             verifyContentChecksum();
+<a class="jxr_linenumber" name="L190" href="#L190">190</a>             <strong class="jxr_keyword">return</strong>;
+<a class="jxr_linenumber" name="L191" href="#L191">191</a>         }
+<a class="jxr_linenumber" name="L192" href="#L192">192</a>         InputStream capped = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/commons/compress/utils/BoundedInputStream.html">BoundedInputStream</a>(in, realLen);
+<a class="jxr_linenumber" name="L193" href="#L193">193</a>         <strong class="jxr_keyword">if</strong> (uncompressed) {
+<a class="jxr_linenumber" name="L194" href="#L194">194</a>             inUncompressed = <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="L195" href="#L195">195</a>             currentBlock = capped;
+<a class="jxr_linenumber" name="L196" href="#L196">196</a>         } <strong class="jxr_keyword">else</strong> {
+<a class="jxr_linenumber" name="L197" href="#L197">197</a>             inUncompressed = false;
+<a class="jxr_linenumber" name="L198" href="#L198">198</a>             currentBlock = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream.html">BlockLZ4CompressorInputStream</a>(capped);
+<a class="jxr_linenumber" name="L199" href="#L199">199</a>         }
+<a class="jxr_linenumber" name="L200" href="#L200">200</a>     }
+<a class="jxr_linenumber" name="L201" href="#L201">201</a> 
+<a class="jxr_linenumber" name="L202" href="#L202">202</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> maybeFinishCurrentBlock() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L203" href="#L203">203</a>         <strong class="jxr_keyword">if</strong> (currentBlock != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="L204" href="#L204">204</a>             currentBlock.close();
+<a class="jxr_linenumber" name="L205" href="#L205">205</a>             currentBlock = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="L206" href="#L206">206</a>             <strong class="jxr_keyword">if</strong> (expectBlockChecksum) {
+<a class="jxr_linenumber" name="L207" href="#L207">207</a>                 <strong class="jxr_keyword">int</strong> skipped = (<strong class="jxr_keyword">int</strong>) IOUtils.skip(in, 4);
+<a class="jxr_linenumber" name="L208" href="#L208">208</a>                 count(skipped);
+<a class="jxr_linenumber" name="L209" href="#L209">209</a>                 <strong class="jxr_keyword">if</strong> (4 != skipped) {
+<a class="jxr_linenumber" name="L210" href="#L210">210</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading block checksum"</span>);
+<a class="jxr_linenumber" name="L211" href="#L211">211</a>                 }
+<a class="jxr_linenumber" name="L212" href="#L212">212</a>             }
+<a class="jxr_linenumber" name="L213" href="#L213">213</a>         }
+<a class="jxr_linenumber" name="L214" href="#L214">214</a>     }
+<a class="jxr_linenumber" name="L215" href="#L215">215</a> 
+<a class="jxr_linenumber" name="L216" href="#L216">216</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> verifyContentChecksum() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L217" href="#L217">217</a>         <strong class="jxr_keyword">if</strong> (expectContentChecksum) {
+<a class="jxr_linenumber" name="L218" href="#L218">218</a>             byte[] checksum = <strong class="jxr_keyword">new</strong> byte[4];
+<a class="jxr_linenumber" name="L219" href="#L219">219</a>             <strong class="jxr_keyword">int</strong> read = IOUtils.readFully(in, checksum);
+<a class="jxr_linenumber" name="L220" href="#L220">220</a>             count(read);
+<a class="jxr_linenumber" name="L221" href="#L221">221</a>             <strong class="jxr_keyword">if</strong> (4 != read) {
+<a class="jxr_linenumber" name="L222" href="#L222">222</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Premature end of stream while reading content checksum"</span>);
+<a class="jxr_linenumber" name="L223" href="#L223">223</a>             }
+<a class="jxr_linenumber" name="L224" href="#L224">224</a>             <strong class="jxr_keyword">long</strong> expectedHash = contentHash.getValue();
+<a class="jxr_linenumber" name="L225" href="#L225">225</a>             <strong class="jxr_keyword">if</strong> (expectedHash != ByteUtils.fromLittleEndian(checksum)) {
+<a class="jxr_linenumber" name="L226" href="#L226">226</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"content checksum mismatch."</span>);
+<a class="jxr_linenumber" name="L227" href="#L227">227</a>             }
+<a class="jxr_linenumber" name="L228" href="#L228">228</a>             contentHash.reset();
+<a class="jxr_linenumber" name="L229" href="#L229">229</a>         }
+<a class="jxr_linenumber" name="L230" href="#L230">230</a>     }
+<a class="jxr_linenumber" name="L231" href="#L231">231</a> 
+<a class="jxr_linenumber" name="L232" href="#L232">232</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> readOneByte() <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L233" href="#L233">233</a>         <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> b = in.read();
+<a class="jxr_linenumber" name="L234" href="#L234">234</a>         <strong class="jxr_keyword">if</strong> (b != -1) {
+<a class="jxr_linenumber" name="L235" href="#L235">235</a>             count(1);
+<a class="jxr_linenumber" name="L236" href="#L236">236</a>             <strong class="jxr_keyword">return</strong> b &amp; 0xFF;
+<a class="jxr_linenumber" name="L237" href="#L237">237</a>         }
+<a class="jxr_linenumber" name="L238" href="#L238">238</a>         <strong class="jxr_keyword">return</strong> -1;
+<a class="jxr_linenumber" name="L239" href="#L239">239</a>     }
+<a class="jxr_linenumber" name="L240" href="#L240">240</a> 
+<a class="jxr_linenumber" name="L241" href="#L241">241</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> readOnce(byte[] b, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="L242" href="#L242">242</a>         <strong class="jxr_keyword">if</strong> (inUncompressed) {
+<a class="jxr_linenumber" name="L243" href="#L243">243</a>             <strong class="jxr_keyword">int</strong> cnt = currentBlock.read(b, off, len);
+<a class="jxr_linenumber" name="L244" href="#L244">244</a>             count(cnt);
+<a class="jxr_linenumber" name="L245" href="#L245">245</a>             <strong class="jxr_keyword">return</strong> cnt;
+<a class="jxr_linenumber" name="L246" href="#L246">246</a>         } <strong class="jxr_keyword">else</strong> {
+<a class="jxr_linenumber" name="L247" href="#L247">247</a>             <a href="../../../../../../org/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream.html">BlockLZ4CompressorInputStream</a> l = (BlockLZ4CompressorInputStream) currentBlock;
+<a class="jxr_linenumber" name="L248" href="#L248">248</a>             <strong class="jxr_keyword">long</strong> before = l.getBytesRead();
+<a class="jxr_linenumber" name="L249" href="#L249">249</a>             <strong class="jxr_keyword">int</strong> cnt = currentBlock.read(b, off, len);
+<a class="jxr_linenumber" name="L250" href="#L250">250</a>             count(l.getBytesRead() - before);
+<a class="jxr_linenumber" name="L251" href="#L251">251</a>             <strong class="jxr_keyword">return</strong> cnt;
+<a class="jxr_linenumber" name="L252" href="#L252">252</a>         }
+<a class="jxr_linenumber" name="L253" href="#L253">253</a>     }
+<a class="jxr_linenumber" name="L254" href="#L254">254</a> 
+<a class="jxr_linenumber" name="L255" href="#L255">255</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="L256" href="#L256">256</a> <em class="jxr_javadoccomment">     * Checks if the signature matches what is expected for a .lz4 file.</em>
+<a class="jxr_linenumber" name="L257" href="#L257">257</a> <em class="jxr_javadoccomment">     *</em>
+<a class="jxr_linenumber" name="L258" href="#L258">258</a> <em class="jxr_javadoccomment">     * &lt;p&gt;.lz4 files start with a four byte signature.&lt;/p&gt;</em>
+<a class="jxr_linenumber" name="L259" href="#L259">259</a> <em class="jxr_javadoccomment">     *</em>
+<a class="jxr_linenumber" name="L260" href="#L260">260</a> <em class="jxr_javadoccomment">     * @param signature the bytes to check</em>
+<a class="jxr_linenumber" name="L261" href="#L261">261</a> <em class="jxr_javadoccomment">     * @param length    the number of bytes to check</em>
+<a class="jxr_linenumber" name="L262" href="#L262">262</a> <em class="jxr_javadoccomment">     * @return          true if this is a .sz stream, false otherwise</em>
+<a class="jxr_linenumber" name="L263" href="#L263">263</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="L264" href="#L264">264</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> matches(<strong class="jxr_keyword">final</strong> byte[] signature, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> length) {
+<a class="jxr_linenumber" name="L265" href="#L265">265</a> 
+<a class="jxr_linenumber" name="L266" href="#L266">266</a>         <strong class="jxr_keyword">if</strong> (length &lt; LZ4_SIGNATURE.length) {
+<a class="jxr_linenumber" name="L267" href="#L267">267</a>             <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="L268" href="#L268">268</a>         }
+<a class="jxr_linenumber" name="L269" href="#L269">269</a> 
+<a class="jxr_linenumber" name="L270" href="#L270">270</a>         byte[] shortenedSig = signature;
+<a class="jxr_linenumber" name="L271" href="#L271">271</a>         <strong class="jxr_keyword">if</strong> (signature.length &gt; LZ4_SIGNATURE.length) {
+<a class="jxr_linenumber" name="L272" href="#L272">272</a>             shortenedSig = <strong class="jxr_keyword">new</strong> byte[LZ4_SIGNATURE.length];
+<a class="jxr_linenumber" name="L273" href="#L273">273</a>             System.arraycopy(signature, 0, shortenedSig, 0, LZ4_SIGNATURE.length);
+<a class="jxr_linenumber" name="L274" href="#L274">274</a>         }
+<a class="jxr_linenumber" name="L275" href="#L275">275</a> 
+<a class="jxr_linenumber" name="L276" href="#L276">276</a>         <strong class="jxr_keyword">return</strong> Arrays.equals(shortenedSig, LZ4_SIGNATURE);
+<a class="jxr_linenumber" name="L277" href="#L277">277</a>     }
+<a class="jxr_linenumber" name="L278" href="#L278">278</a> }
 </pre>
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