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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 &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<CHandleFile> *ptr= (vector<CHandleFile>*)<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<CHandleFile>;
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 => 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>>=ptr->size())
00061 {
00062 ptr->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 &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 &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 &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 (&nOffsetFromBegining, <font class="keyword">sizeof</font>(uint32), 1, handle.File);
00110 fseek (handle.File, nOffsetFromBegining, SEEK_SET);
00111 uint32 nNbFile;
00112 fread (&nNbFile, <font class="keyword">sizeof</font>(uint32), 1, handle.File);
00113 <font class="keywordflow">for</font> (uint32 i = 0; i < nNbFile; ++i)
00114 {
00115 <font class="keywordtype">char</font> FileName[256];
00116 uint8 nStringSize;
00117 fread (&nStringSize, 1, 1, handle.File);
00118 fread (FileName, 1, nStringSize, handle.File);
00119 FileName[nStringSize] = 0;
00120 uint32 nFileSize;
00121 fread (&nFileSize, <font class="keyword">sizeof</font>(uint32), 1, handle.File);
00122 uint32 nFilePos;
00123 fread (&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&<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&<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 &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<string, BNP>::iterator it = <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (sBigFileName);
00158 BNP &rbnp = it->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 &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 &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 &sBigFileName, std::vector<std::string> &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 &rbnp = <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (lwrFileName)->second;
00192 map<string,BNPFile>::iterator it = rbnp.Files.begin();
00193 <font class="keywordflow">while</font> (it != rbnp.Files.end())
00194 {
00195 vAllFiles.push_back (it->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()->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 &sFileName, uint32 &rFileSize,
00211 uint32 &rBigFileOffset, <font class="keywordtype">bool</font> &rCacheFileOnOpen, <font class="keywordtype">bool</font> &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 < nPos; ++i)
00222 zeBigFileName += lwrFileName[i];
00223 ++i; <font class="comment">// Skip @</font>
00224 <font class="keywordflow">for</font> (; i < 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 &rbnp = <a class="code" href="classNLMISC_1_1CBigFile.html#o1">_BNPs</a>.find (zeBigFileName)->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 &rbnpfile = rbnp.Files.find (zeFileName)->second;
00241
00242 <font class="comment">// Get a ThreadSafe handle on the file</font>
00243 CHandleFile &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>
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