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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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