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plistifier/lib/cfpropertylist/doc/classes/CFPropertyList/Binary.src/M000031.html
Jeena Paradies 2bba8c5fee first commit
2010-06-12 17:59:50 +02:00

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<title>read_binary_object (CFPropertyList::Binary)</title>
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<pre><span class="ruby-comment cmt"># File rbBinaryCFPropertyList.rb, line 297</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">read_binary_object</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>)
<span class="ruby-comment cmt"># first: read the marker byte</span>
<span class="ruby-identifier">buff</span> = <span class="ruby-identifier">fd</span>.<span class="ruby-identifier">read</span>(<span class="ruby-value">1</span>)
<span class="ruby-identifier">object_length</span> = <span class="ruby-identifier">buff</span>.<span class="ruby-identifier">unpack</span>(<span class="ruby-value str">&quot;C*&quot;</span>)
<span class="ruby-identifier">object_length</span> = <span class="ruby-identifier">object_length</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">&amp;</span> <span class="ruby-value">0x</span><span class="ruby-constant">F</span>
<span class="ruby-identifier">buff</span> = <span class="ruby-identifier">buff</span>.<span class="ruby-identifier">unpack</span>(<span class="ruby-value str">&quot;H*&quot;</span>)
<span class="ruby-identifier">object_type</span> = <span class="ruby-identifier">buff</span>[<span class="ruby-value">0</span>][<span class="ruby-value">0</span>].<span class="ruby-identifier">chr</span>
<span class="ruby-keyword kw">if</span>(<span class="ruby-identifier">object_type</span> <span class="ruby-operator">!=</span> <span class="ruby-value str">&quot;0&quot;</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-identifier">object_length</span> <span class="ruby-operator">==</span> <span class="ruby-value">15</span>) <span class="ruby-keyword kw">then</span>
<span class="ruby-identifier">object_length</span> = <span class="ruby-identifier">read_binary_object</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>)
<span class="ruby-identifier">object_length</span> = <span class="ruby-identifier">object_length</span>.<span class="ruby-identifier">value</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-keyword kw">nil</span>
<span class="ruby-keyword kw">case</span> <span class="ruby-identifier">object_type</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'0'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># null, false, true, fillbyte</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_null_type</span>(<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'1'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># integer</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_int</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'2'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># real</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_real</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'3'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># date</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_date</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'4'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># data</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_data</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'5'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># byte string, usually utf8 encoded</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_string</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'6'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># unicode string (utf16be)</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_unicode_string</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'a'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># array</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_array</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'d'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-comment cmt"># dictionary</span>
<span class="ruby-identifier">retval</span> = <span class="ruby-identifier">read_binary_dict</span>(<span class="ruby-identifier">fname</span>,<span class="ruby-identifier">fd</span>,<span class="ruby-identifier">object_length</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-identifier">retval</span>
<span class="ruby-keyword kw">end</span></pre>
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