From 0ea5fc66924303d1bf73ba283a383e2aadee02f2 Mon Sep 17 00:00:00 2001
From: neodarz <neodarz@neodarz.net>
Date: Sat, 11 Aug 2018 20:21:34 +0200
Subject: Initial commit

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+<hr><h1>big_file.cpp</h1><a href="big__file_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
+00007 <font class="comment">/* Copyright, 2000, 2002 Nevrax Ltd.</font>
+00008 <font class="comment"> *</font>
+00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
+00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
+00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
+00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
+00013 <font class="comment"> * any later version.</font>
+00014 <font class="comment"></font>
+00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
+00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
+00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
+00018 <font class="comment"> * General Public License for more details.</font>
+00019 <font class="comment"></font>
+00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
+00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
+00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
+00023 <font class="comment"> * MA 02111-1307, USA.</font>
+00024 <font class="comment"> */</font>
+00025 
+00026 <font class="preprocessor">#include "<a class="code" href="stdmisc_8h.html">stdmisc.h</a>"</font>
+00027 
+00028 <font class="preprocessor">#include "<a class="code" href="big__file_8h.html">nel/misc/big_file.h</a>"</font>
+00029 <font class="preprocessor">#include "<a class="code" href="path_8h.html">nel/misc/path.h</a>"</font>
+00030 
+00031 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
+00032 
+00033 <font class="keyword">namespace </font>NLMISC {
+00034 
+<a name="l00035"></a><a class="code" href="classNLMISC_1_1CBigFile.html#r0">00035</a> CBigFile *CBigFile::_Singleton = NULL;
+00036 
+00037 
+00038 <font class="comment">// ***************************************************************************</font>
+<a name="l00039"></a><a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#a0">00039</a> CBigFile::CThreadFileArray::CThreadFileArray()
+00040 {
+00041         <a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#o1">_CurrentId</a>= 0;
+00042 }
+00043 <font class="comment">// ***************************************************************************</font>
+<a name="l00044"></a><a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#a1">00044</a> uint32                                          CBigFile::CThreadFileArray::allocate()
+00045 {
+00046         <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#o1">_CurrentId</a>++;
+00047 }
+00048 <font class="comment">// ***************************************************************************</font>
+<a name="l00049"></a><a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#a2">00049</a> CBigFile::CHandleFile           &amp;CBigFile::CThreadFileArray::get(uint32 <a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>)
+00050 {
+00051         <font class="comment">// If the thread struct ptr is NULL, must allocate it.</font>
+00052         vector&lt;CHandleFile&gt;             *ptr= (vector&lt;CHandleFile&gt;*)<a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#o0">_TDS</a>.getPointer();
+00053         <font class="keywordflow">if</font>(ptr==NULL)
+00054         {
+00055                 ptr= <font class="keyword">new</font> vector&lt;CHandleFile&gt;;
+00056                 <a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#o0">_TDS</a>.setPointer(ptr);
+00057         }
+00058 
+00059         <font class="comment">// if the vector is not allocated, allocate it (empty entries filled with NULL =&gt; not opened FILE* in this thread)</font>
+00060         <font class="keywordflow">if</font>(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>&gt;=ptr-&gt;size())
+00061         {
+00062                 ptr-&gt;resize(<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>+1);
+00063         }
+00064 
+00065         <font class="keywordflow">return</font> (*ptr)[<a class="code" href="driver__opengl__extension__def_8h.html#a358">index</a>];
+00066 }
+00067 
+00068 
+00069 <font class="comment">// ***************************************************************************</font>
+<a name="l00070"></a><a class="code" href="classNLMISC_1_1CBigFile.html#c0">00070</a> CBigFile::CBigFile ()
+00071 {
+00072 }
+00073 
+00074 <font class="comment">// ***************************************************************************</font>
+<a name="l00075"></a><a class="code" href="classNLMISC_1_1CBigFile.html#d0">00075</a> CBigFile &amp;CBigFile::getInstance ()
+00076 {
+00077         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CBigFile.html#r0">_Singleton</a> == NULL)
+00078         {
+00079                 <a class="code" href="classNLMISC_1_1CBigFile.html#r0">_Singleton</a> = <font class="keyword">new</font> <a class="code" href="classNLMISC_1_1CBigFile.html#c0">CBigFile</a>();
+00080         }
+00081         <font class="keywordflow">return</font> *<a class="code" href="classNLMISC_1_1CBigFile.html#r0">_Singleton</a>;
+00082 }
+00083 
+00084 <font class="comment">// ***************************************************************************</font>
+<a name="l00085"></a><a class="code" href="classNLMISC_1_1CBigFile.html#a0">00085</a> <font class="keywordtype">bool</font> CBigFile::add (<font class="keyword">const</font> std::string &amp;sBigFileName, uint32 nOptions)
+00086 {
+00087         BNP bnpTmp;
+00088 
+00089         bnpTmp.BigFileName= sBigFileName;
+00090 
+00091         <font class="comment">// Is already the same bigfile name ?</font>
+00092         string bigfilenamealone = CFile::getFilename (sBigFileName);
+00093         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find(bigfilenamealone) != <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.end())
+00094                 <font class="keywordflow">return</font> <font class="keyword">false</font>;
+00095 
+00096         <font class="comment">// Allocate a new ThreadSafe FileId for this bnp.</font>
+00097         bnpTmp.ThreadFileId= <a class="code" href="classNLMISC_1_1CBigFile.html#o0">_ThreadFileArray</a>.<a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#a1">allocate</a>();
+00098 
+00099         <font class="comment">// Get a ThreadSafe handle on the file</font>
+00100         CHandleFile             &amp;handle= <a class="code" href="classNLMISC_1_1CBigFile.html#o0">_ThreadFileArray</a>.<a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#a2">get</a>(bnpTmp.ThreadFileId);
+00101         <font class="comment">// Open the big file.</font>
+00102         handle.File = fopen (sBigFileName.c_str(), <font class="stringliteral">"rb"</font>);
+00103         <font class="keywordflow">if</font> (handle.File == NULL)
+00104                 <font class="keywordflow">return</font> <font class="keyword">false</font>;
+00105         fseek (handle.File, 0, SEEK_END);
+00106         uint32 nFileSize = ftell (handle.File);
+00107         fseek (handle.File, nFileSize-4, SEEK_SET);
+00108         uint32 nOffsetFromBegining;
+00109         fread (&amp;nOffsetFromBegining, <font class="keyword">sizeof</font>(uint32), 1, handle.File);
+00110         fseek (handle.File, nOffsetFromBegining, SEEK_SET);
+00111         uint32 nNbFile;
+00112         fread (&amp;nNbFile, <font class="keyword">sizeof</font>(uint32), 1, handle.File);
+00113         <font class="keywordflow">for</font> (uint32 i = 0; i &lt; nNbFile; ++i)
+00114         {
+00115                 <font class="keywordtype">char</font> FileName[256];
+00116                 uint8 nStringSize;
+00117                 fread (&amp;nStringSize, 1, 1, handle.File);
+00118                 fread (FileName, 1, nStringSize, handle.File);
+00119                 FileName[nStringSize] = 0;
+00120                 uint32 nFileSize;
+00121                 fread (&amp;nFileSize, <font class="keyword">sizeof</font>(uint32), 1, handle.File);
+00122                 uint32 nFilePos;
+00123                 fread (&amp;nFilePos, <font class="keyword">sizeof</font>(uint32), 1, handle.File);
+00124                 BNPFile bnpfTmp;
+00125                 bnpfTmp.Pos = nFilePos;
+00126                 bnpfTmp.Size = nFileSize;
+00127                 bnpTmp.Files.insert (make_pair(<a class="code" href="namespaceNLMISC.html#a229">strlwr</a>(string(FileName)), bnpfTmp));
+00128         }
+00129         fseek (handle.File, 0, SEEK_SET);
+00130 
+00131         <font class="keywordflow">if</font> (nOptions&amp;<a class="code" href="namespaceNLMISC.html#a1">BF_CACHE_FILE_ON_OPEN</a>)
+00132                 bnpTmp.CacheFileOnOpen = <font class="keyword">true</font>;
+00133         <font class="keywordflow">else</font>
+00134                 bnpTmp.CacheFileOnOpen = <font class="keyword">false</font>;
+00135 
+00136         <font class="keywordflow">if</font> (!(nOptions&amp;<a class="code" href="namespaceNLMISC.html#a0">BF_ALWAYS_OPENED</a>))
+00137         {
+00138                 fclose (handle.File);
+00139                 handle.File = NULL;
+00140                 bnpTmp.AlwaysOpened = <font class="keyword">false</font>;
+00141         }
+00142         <font class="keywordflow">else</font>
+00143         {
+00144                 bnpTmp.AlwaysOpened = <font class="keyword">true</font>;
+00145         }
+00146 
+00147         <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.insert (make_pair(<a class="code" href="namespaceNLMISC.html#a229">strlwr</a>(bigfilenamealone), bnpTmp));
+00148 
+00149         <font class="keywordflow">return</font> <font class="keyword">true</font>;
+00150 }
+00151 
+00152 <font class="comment">// ***************************************************************************</font>
+<a name="l00153"></a><a class="code" href="classNLMISC_1_1CBigFile.html#a1">00153</a> <font class="keywordtype">void</font> CBigFile::remove (<font class="keyword">const</font> std::string &amp;sBigFileName)
+00154 {
+00155         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (sBigFileName) != <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.end())
+00156         {
+00157                 map&lt;string, BNP&gt;::iterator it = <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (sBigFileName);
+00158                 BNP &amp;rbnp = it-&gt;second;
+00159                 <font class="comment">/* \todo yoyo: THERE is a MAJOR drawback here: Only the FILE * of the current (surely main) thread</font>
+00160 <font class="comment">                        is closed. other FILE* in other threads are still opened. This is not a big issue (system close the FILE* </font>
+00161 <font class="comment">                        at the end of the process) and this is important so AsyncLoading of a currentTask can end up correclty </font>
+00162 <font class="comment">                        (without an intermediate fclose()).</font>
+00163 <font class="comment">                */</font>
+00164                 <font class="comment">// Get a ThreadSafe handle on the file</font>
+00165                 CHandleFile             &amp;handle= <a class="code" href="classNLMISC_1_1CBigFile.html#o0">_ThreadFileArray</a>.<a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#a2">get</a>(rbnp.ThreadFileId);
+00166                 <font class="comment">// close it if needed</font>
+00167                 <font class="keywordflow">if</font> (handle.File != NULL)
+00168                 {
+00169                         fclose (handle.File);
+00170                         handle.File= NULL;
+00171                 }
+00172                 <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.erase (it);
+00173         }
+00174 }
+00175 
+00176 <font class="comment">// ***************************************************************************</font>
+<a name="l00177"></a><a class="code" href="classNLMISC_1_1CBigFile.html#a2">00177</a> <font class="keywordtype">bool</font> CBigFile::isBigFileAdded(<font class="keyword">const</font> std::string &amp;sBigFileName)
+00178 {
+00179         <font class="comment">// Is already the same bigfile name ?</font>
+00180         string bigfilenamealone = CFile::getFilename (sBigFileName);
+00181         <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find(bigfilenamealone) != <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.end();
+00182 }
+00183 
+00184 <font class="comment">// ***************************************************************************</font>
+<a name="l00185"></a><a class="code" href="classNLMISC_1_1CBigFile.html#a3">00185</a> <font class="keywordtype">void</font> CBigFile::list (<font class="keyword">const</font> std::string &amp;sBigFileName, std::vector&lt;std::string&gt; &amp;vAllFiles)
+00186 {
+00187         string lwrFileName = <a class="code" href="namespaceNLMISC.html#a229">strlwr</a> (sBigFileName);
+00188         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (lwrFileName) == <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.end())
+00189                 <font class="keywordflow">return</font>;
+00190         vAllFiles.clear ();
+00191         BNP &amp;rbnp = <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (lwrFileName)-&gt;second;
+00192         map&lt;string,BNPFile&gt;::iterator it = rbnp.Files.begin();
+00193         <font class="keywordflow">while</font> (it != rbnp.Files.end())
+00194         {
+00195                 vAllFiles.push_back (it-&gt;first); <font class="comment">// Add the name of the file to the return vector</font>
+00196                 ++it;
+00197         }
+00198 }
+00199 
+00200 <font class="comment">// ***************************************************************************</font>
+<a name="l00201"></a><a class="code" href="classNLMISC_1_1CBigFile.html#a4">00201</a> <font class="keywordtype">void</font> CBigFile::removeAll ()
+00202 {
+00203         <font class="keywordflow">while</font> (<a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.begin() != <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.end())
+00204         {
+00205                 <a class="code" href="classNLMISC_1_1CBigFile.html#a1">remove</a> (<a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.begin()-&gt;first);
+00206         }
+00207 }
+00208 
+00209 <font class="comment">// ***************************************************************************</font>
+<a name="l00210"></a><a class="code" href="classNLMISC_1_1CBigFile.html#a5">00210</a> FILE* CBigFile::getFile (<font class="keyword">const</font> std::string &amp;sFileName, uint32 &amp;rFileSize, 
+00211                                                  uint32 &amp;rBigFileOffset, <font class="keywordtype">bool</font> &amp;rCacheFileOnOpen, <font class="keywordtype">bool</font> &amp;rAlwaysOpened)
+00212 {
+00213         string zeFileName, zeBigFileName, lwrFileName = <a class="code" href="namespaceNLMISC.html#a229">strlwr</a> (sFileName);
+00214         uint32 i, nPos = sFileName.find (<font class="charliteral">'@'</font>);
+00215         <font class="keywordflow">if</font> (nPos == string::npos)
+00216         {
+00217                 <a class="code" href="debug_8h.html#a2">nlwarning</a> (<font class="stringliteral">"Couldn't load '%s'"</font>, sFileName.c_str());
+00218                 <font class="keywordflow">return</font> NULL;
+00219         }
+00220 
+00221         <font class="keywordflow">for</font> (i = 0; i &lt; nPos; ++i)
+00222                 zeBigFileName += lwrFileName[i];
+00223         ++i; <font class="comment">// Skip @</font>
+00224         <font class="keywordflow">for</font> (; i &lt; lwrFileName.size(); ++i)
+00225                 zeFileName += lwrFileName[i];
+00226 
+00227         <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (zeBigFileName) == <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.end())
+00228         {
+00229                 <a class="code" href="debug_8h.html#a2">nlwarning</a> (<font class="stringliteral">"Couldn't load '%s'"</font>, sFileName.c_str());
+00230                 <font class="keywordflow">return</font> NULL;
+00231         }
+00232 
+00233         BNP &amp;rbnp = <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (zeBigFileName)-&gt;second;
+00234         if (rbnp.Files.find (zeFileName) == rbnp.Files.end())
+00235         {
+00236                 <a class="code" href="debug_8h.html#a2">nlwarning</a> (<font class="stringliteral">"Couldn't load '%s'"</font>, sFileName.c_str());
+00237                 <font class="keywordflow">return</font> NULL;
+00238         }
+00239 
+00240         BNPFile &amp;rbnpfile = rbnp.Files.find (zeFileName)-&gt;second;
+00241 
+00242         <font class="comment">// Get a ThreadSafe handle on the file</font>
+00243         CHandleFile             &amp;handle= <a class="code" href="classNLMISC_1_1CBigFile.html#o0">_ThreadFileArray</a>.<a class="code" href="classNLMISC_1_1CBigFile_1_1CThreadFileArray.html#a2">get</a>(rbnp.ThreadFileId);
+00244         <font class="comment">/* If not opened, open it now. There is 2 reason for it to be not opened: </font>
+00245 <font class="comment">                rbnp.AlwaysOpened==false, or it is a new thread which use it for the first time.</font>
+00246 <font class="comment">        */</font>
+00247         <font class="keywordflow">if</font>(handle.File== NULL)
+00248         {
+00249                 handle.File = fopen (rbnp.BigFileName.c_str(), <font class="stringliteral">"rb"</font>);
+00250                 <font class="keywordflow">if</font> (handle.File == NULL)
+00251                         <font class="keywordflow">return</font> NULL;
+00252         }
+00253 
+00254         rCacheFileOnOpen = rbnp.CacheFileOnOpen;
+00255         rAlwaysOpened = rbnp.AlwaysOpened;
+00256         rBigFileOffset = rbnpfile.Pos;
+00257         rFileSize = rbnpfile.Size;
+00258         <font class="keywordflow">return</font> handle.File;
+00259 }
+00260 
+00261 } <font class="comment">// namespace NLMISC</font>
+</pre></div>
+
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