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  22 <h1>Sylph/IO/InputStream.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
  23 <a name="l00002"></a>00002 <span class="comment"> * LibSylph Class Library</span>
  24 <a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2009 Frank "SeySayux" Erens &lt;seysayux@gmail.com&gt;</span>
  25 <a name="l00004"></a>00004 <span class="comment"> *</span>
  26 <a name="l00005"></a>00005 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
  27 <a name="l00006"></a>00006 <span class="comment"> * modify it under the terms of the LibSylph Pulbic License as published</span>
  28 <a name="l00007"></a>00007 <span class="comment"> * by the LibSylph Developers; either version 1.0 of the License, or</span>
  29 <a name="l00008"></a>00008 <span class="comment"> * (at your option) any later version.</span>
  30 <a name="l00009"></a>00009 <span class="comment"> *</span>
  31 <a name="l00010"></a>00010 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
  32 <a name="l00011"></a>00011 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
  33 <a name="l00012"></a>00012 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the LibSylph</span>
  34 <a name="l00013"></a>00013 <span class="comment"> * Public License for more details.</span>
  35 <a name="l00014"></a>00014 <span class="comment"> *</span>
  36 <a name="l00015"></a>00015 <span class="comment"> * You should have received a copy of the LibSylph Public License</span>
  37 <a name="l00016"></a>00016 <span class="comment"> * along with this Library, if not, contact the LibSylph Developers.</span>
  38 <a name="l00017"></a>00017 <span class="comment"> * </span>
  39 <a name="l00018"></a>00018 <span class="comment"> * Created on 27 april 2009, 17:39</span>
  40 <a name="l00019"></a>00019 <span class="comment"> */</span>
  41 <a name="l00020"></a>00020
  42 <a name="l00021"></a>00021 <span class="preprocessor">#ifndef INPUTSTREAM_H_</span>
  43 <a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define INPUTSTREAM_H_</span>
  44 <a name="l00023"></a>00023 <span class="preprocessor"></span>
  45 <a name="l00024"></a>00024
  46 <a name="l00025"></a>00025 <span class="preprocessor">#include "../Core/Object.h"</span>
  47 <a name="l00026"></a>00026 <span class="preprocessor">#include "../Core/Primitives.h"</span>
  48 <a name="l00027"></a>00027 <span class="preprocessor">#include "../Core/Array.h"</span>
  49 <a name="l00028"></a>00028 <span class="preprocessor">#include "../Core/String.h"</span>
  50 <a name="l00029"></a>00029
  51 <a name="l00030"></a>00030 SYLPH_BEGIN_NAMESPACE
  52 <a name="l00031"></a>00031 SYLPH_PUBLIC
  53 <a name="l00032"></a>00032
  54 <a name="l00033"></a>00033 <span class="keyword">class </span>InputStream : <span class="keyword">public</span> <span class="keyword">virtual</span> Object {
  55 <a name="l00034"></a>00034 <span class="keyword">public</span>:
  56 <a name="l00035"></a>00035     InputStream() : closed(false) {}
  57 <a name="l00036"></a>00036     <span class="keyword">virtual</span> ~InputStream() {}
  58 <a name="l00037"></a>00037
  59 <a name="l00038"></a>00038     <span class="keyword">virtual</span> fsize_t available() <span class="keyword">const</span> = 0;
  60 <a name="l00039"></a>00039     <span class="keyword">virtual</span> <span class="keywordtype">void</span> close() { closed = <span class="keyword">true</span>; }
  61 <a name="l00040"></a>00040     <span class="keyword">virtual</span> <span class="keywordtype">void</span> read(byte&amp; b) {
  62 <a name="l00041"></a>00041         operator&gt;&gt;(b);
  63 <a name="l00042"></a>00042     }
  64 <a name="l00043"></a>00043     <span class="keyword">virtual</span> fssize_t read(Array&lt;byte&gt;&amp; b, off_t offset = 0, <span class="keywordtype">size_t</span> len = 0) {
  65 <a name="l00044"></a>00044         <span class="keywordflow">if</span>(!len) len = b.length;
  66 <a name="l00045"></a>00045         <span class="keywordflow">if</span>(offset + len &gt; b.length) sthrow(ArrayException, <span class="stringliteral">"Index out of bounds"</span>);
  67 <a name="l00046"></a>00046         <span class="keywordflow">if</span>(eof()) <span class="keywordflow">return</span> -1;
  68 <a name="l00047"></a>00047         fssize_t actuallyRead = 0;
  69 <a name="l00048"></a>00048         <span class="keywordflow">for</span>(idx_t i = offset; i &lt; len; i++) {
  70 <a name="l00049"></a>00049             <span class="keywordflow">if</span>(eof()) <span class="keywordflow">break</span>;
  71 <a name="l00050"></a>00050             operator&gt;&gt;(b[i]);
  72 <a name="l00051"></a>00051             actuallyRead++;
  73 <a name="l00052"></a>00052         }
  74 <a name="l00053"></a>00053         <span class="keywordflow">return</span> actuallyRead;
  75 <a name="l00054"></a>00054     }
  76 <a name="l00055"></a>00055     <span class="keyword">virtual</span> <span class="keywordtype">bool</span> eof() <span class="keyword">const</span> = 0;
  77 <a name="l00056"></a>00056     <span class="keyword">virtual</span> <span class="keywordtype">bool</span> markSupported()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <span class="keyword">false</span>; }
  78 <a name="l00057"></a>00057     <span class="keyword">virtual</span> <span class="keywordtype">void</span> mark(fsize_t) = 0;
  79 <a name="l00058"></a>00058     <span class="keyword">virtual</span> fsize_t skip(fsize_t) = 0;
  80 <a name="l00059"></a>00059     <span class="keyword">virtual</span> <span class="keywordtype">void</span> reset() = 0;
  81 <a name="l00060"></a>00060
  82 <a name="l00061"></a>00061     <span class="keyword">virtual</span> InputStream&amp; operator&gt;&gt;(byte&amp;) = 0;
  83 <a name="l00062"></a>00062     <span class="keyword">virtual</span> InputStream&amp; operator&gt;&gt;(Array&lt;byte&gt;&amp; b) {
  84 <a name="l00063"></a>00063         read(b);
  85 <a name="l00064"></a>00064         <span class="keywordflow">return</span> *<span class="keyword">this</span>;
  86 <a name="l00065"></a>00065     }
  87 <a name="l00066"></a>00066     <span class="keywordtype">bool</span> toBool()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> eof() &amp;&amp; !closed; }
  88 <a name="l00067"></a>00067 <span class="keyword">protected</span>:
  89 <a name="l00068"></a>00068     <span class="keywordtype">bool</span> closed;
  90 <a name="l00069"></a>00069 };
  91 <a name="l00070"></a>00070 SYLPH_END_NAMESPACE
  92 <a name="l00071"></a>00071
  93 <a name="l00072"></a>00072 <span class="preprocessor">#endif  </span><span class="comment">/* INPUTSTREAM_H_ */</span>
  94 </pre></div></div>
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