<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.14"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libopenraw: lib/io/memstream.cpp Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">libopenraw </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.14 --> <script type="text/javascript" src="menudata.js"></script> <script type="text/javascript" src="menu.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(function() { initMenu('',false,false,'search.php','Search'); }); /* @license-end */</script> <div id="main-nav"></div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="dir_97aefd0d527b934f1d99a682da8fe6a9.html">lib</a></li><li class="navelem"><a class="el" href="dir_5d0aa56803c8250a5d891761f6bfc5c7.html">io</a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="headertitle"> <div class="title">memstream.cpp</div> </div> </div><!--header--> <div class="contents"> <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * libopenraw - memstream.cpp</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Copyright (C) 2007-2017 Hubert Figuière</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This library is free software: you can redistribute it and/or</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public License</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * as published by the Free Software Foundation, either version 3 of</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * the License, or (at your option) any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * Lesser General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * License along with this library. If not, see</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> */</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <string.h></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <stdio.h></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <libopenraw/consts.h></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <libopenraw/debug.h></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "memstream.hpp"</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "trace.hpp"</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">using namespace </span><a class="code" href="namespaceDebug.html">Debug</a>;</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">namespace </span><a class="code" href="namespaceOpenRaw.html">OpenRaw</a> {</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span>IO {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> MemStream::MemStream(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> s)</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  : Stream(<span class="stringliteral">""</span>),</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  m_ptr(ptr),</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  m_size(s),</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  m_current(nullptr)</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> {</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> }</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="classOpenRaw_1_1IO_1_1MemStream.html#acc5ac0d3fd506431478471f651a83a08"> 44</a></span> or_error MemStream::open()</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> {</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  m_current = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *)m_ptr;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">return</span> OR_ERROR_NONE;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> }</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="classOpenRaw_1_1IO_1_1MemStream.html#a5667c4bef1c37b4e5e2bf07452e98d84"> 51</a></span> <span class="keywordtype">int</span> MemStream::close()</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> {</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  m_current = NULL;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> }</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="classOpenRaw_1_1IO_1_1MemStream.html#affa7a0eab12a648e64436338cbd832cc"> 57</a></span> <span class="keywordtype">int</span> MemStream::seek(off_t offset, <span class="keywordtype">int</span> whence)</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> {</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordtype">int</span> newpos = 0;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// LOGDBG1("MemStream::seek %ld bytes - whence = %d", offset, whence);</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// TODO check bounds</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (m_current == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// TODO set error code</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">switch</span>(whence)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">case</span> SEEK_SET:</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  m_current = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)m_ptr + offset;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  newpos = offset;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">case</span> SEEK_END:</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  m_current = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)m_ptr + m_size + offset;</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  newpos = m_size + offset;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">case</span> SEEK_CUR:</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  m_current += offset;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  newpos = (m_current - (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)m_ptr);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  }</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> newpos;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="classOpenRaw_1_1IO_1_1MemStream.html#a8a65a64a0c93949230c8c15974d37fc4"> 88</a></span> <span class="keywordtype">int</span> MemStream::read(<span class="keywordtype">void</span> *buf, <span class="keywordtype">size_t</span> count)</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">if</span>((m_current == <span class="keyword">nullptr</span>) || (m_ptr == <span class="keyword">nullptr</span>)) {</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  LOGDBG1(<span class="stringliteral">"MemStream::failed\n"</span>);</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> * end = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)m_ptr + m_size;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">if</span>((off_t)count > (end - m_current)) {</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  count = end - m_current;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="comment">// TODO set EOF</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  }</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  memcpy(buf, m_current, count);</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  m_current += count;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> count;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> off_t MemStream::filesize()</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> m_size;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> }</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> }</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> }</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">/*</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> Local Variables:</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> mode:c++</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> c-file-style:"stroustrup"</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> c-file-offsets:((innamespace . 0))</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> tab-width:2</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> c-basic-offset:2</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> indent-tabs-mode:nil</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> fill-column:80</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> End:</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment">*/</span></div><div class="ttc" id="namespaceOpenRaw_html"><div class="ttname"><a href="namespaceOpenRaw.html">OpenRaw</a></div><div class="ttdoc">CIFF is the container for CRW files. It is an attempt from Canon to make this a standard. I guess it failed. </div><div class="ttdef"><b>Definition:</b> <a href="arwfile_8cpp_source.html#l00030">arwfile.cpp:30</a></div></div> <div class="ttc" id="namespaceDebug_html"><div class="ttname"><a href="namespaceDebug.html">Debug</a></div><div class="ttdef"><b>Definition:</b> <a href="trace_8cpp_source.html#l00030">trace.cpp:30</a></div></div> </div><!-- fragment --></div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.14 </small></address> </body> </html>