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Wednesday the 23rd of May 2012 @ 11:29pm

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LibN2L N2L Home Older News Downloads Documentation (n2l5) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Documentation (libN2L-4) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Bugtracker Project Page Report a Bug Bug List Related Things Life 2130 Devel Game Journal

LibN2L-4 Library Code Reference Classes Compounds Files Members Method Index Full Reference cVfsFile.cpp Go to the documentation of this file. /************************************************************************ Nova-2 Library (libN2L, or simply n2l) Game development C++ Library Copyright (C) 2003 Aaron Cameron This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA A copy of the GNU Lesser General Public License has been provided with this library in the file 'COPYING'. Contact information for the author of this library has been provided with this library in the file 'AUTHOR'. ************************************************************************/ #include "cVfsFile.h" #include "vfsUtilities.h" #include "cVfsOpenException.h" #include "cVfsReadException.h" #include "cVfsWriteException.h" #include "cVfsNoPermissionException.h" #include "SDL.h" #include <vector> #include <stdio.h> using namespace std; namespace n2l { const tUint cVfsFile::FirstLineMaxLength( 8096 ); /* ************************************************************ */ cVfsFile::cVfsFile( const tFsNodeName & iName ) : mFsNodeName(iName), mStat(iName), mBufferCached(false), mBufferFirstLineCached(false), mSizeCached(false) { if (!mStat.isFile()) throw cVfsOpenException("cVfsFile::cVfsFile", "Not a file node", iName); // File names are always the last part of the vfs name vector<tVfsNodeName> temp = splitVfsPathBlocks(convertFsLiteralNameToVfs(iName)); if (temp.empty()) // Whoah... that shouldn't happen throw cVfsOpenException("cVfsFile::cVfsFile", "No leaf node?", iName); mVfsNodeName = temp[temp.size()-1]; } /* ************************************************************ */ cVfsFile::~cVfsFile() { } /* ************************************************************ */ const tVfsNodeName & cVfsFile::name() const { return mVfsNodeName; } /* ************************************************************ */ const tUint cVfsFile::permissions() const { return mStat.permissions(); } /* ************************************************************ */ const tBool cVfsFile::isSymLink() const { return mStat.isSymLink(); } /* ************************************************************ */ const tFsNodeName cVfsFile::readLink() const { return mStat.readLink(); } /* ************************************************************ */ const tVfsFileBuffer & cVfsFile::buffer() const { if (!mBufferCached) readBuffer(); return mBuffer; } /* ************************************************************ */ void cVfsFile::buffer( const tVfsFileBuffer &iBuffer ) const { if (!mStat.writeable()) throw cVfsNoPermissionException( "cVfsFile::buffer", "No write permission to node", mVfsNodeName ); mBuffer = iBuffer; mBufferCached = true; mBufferFirstLineCached = false; mBufferFirstLine.clear(); mSizeCached = false; // Write the buffer writeBufferToDisk(); } /* ************************************************************ */ void cVfsFile::getBuffer( tVfsFileBuffer & oBuffer ) const { if (mBufferCached) oBuffer = mBuffer; else getFsNodeDump( mFsNodeName,oBuffer ); } /* ************************************************************ */ const tVfsFileBuffer & cVfsFile::firstLine() const { if (!mBufferFirstLineCached) readFirstLine(); return mBufferFirstLine; } /* ************************************************************ */ SDL_RWops * cVfsFile::getRWops() const { const tVfsFileBuffer & TheBuffer = buffer(); return SDL_RWFromMem( (void*)(TheBuffer.data()), TheBuffer.size() ); } /* ************************************************************ */ const tUint cVfsFile::size() const { if (!mSizeCached) { mFileSize = getFsNodeSize(mFsNodeName); mSizeCached = true; } return mFileSize; } /* ************************************************************ */ void cVfsFile::readBuffer() const { mBuffer.clear(); try { getFsNodeDump(mFsNodeName,mBuffer); mBufferCached = true; } catch (cException & iException) { // We're going to rethrow a more appropriate exception instead throw cVfsReadException("cVfsFile::readBuffer", "Couldn\'t read the file buffer", mFsNodeName); } } /* ************************************************************ */ void cVfsFile::writeBufferToDisk() const { try { FILE *fp = fopen( mFsNodeName.c_str(), "wb" ); if (0==fp) throw cVfsReadException( "cVfsFile::writeBufferToDisk", "Open failed", mFsNodeName ); if (mBuffer.empty()) { fclose(fp); return; } if (1!=fwrite( (void*)(mBuffer.data()), mBuffer.size(), 1, fp )) throw cVfsWriteException( "cVfsFile::writeBufferToDisk", "Write failed, shortfall", mFsNodeName ); fclose(fp); } catch (cVfsReadException &iE) { iE.rethrow(); } catch (cVfsWriteException &iE) { iE.rethrow(); } catch ( ... ) { // We're going to rethrow a more appropriate exception instead throw cVfsWriteException("cVfsFile::writeBufferToDisk", "Couldn\'t write the file buffer.", mFsNodeName); } } /* ************************************************************ */ void cVfsFile::readFirstLine() const { static char smFirstLineBuffer[ FirstLineMaxLength ]; mBufferFirstLine.clear(); FILE * fp = fopen( mFsNodeName.c_str(), "r" ); if (0==fp) throw cVfsReadException("cVfsFile::readFirstLine","Open failed",mFsNodeName); fgets( smFirstLineBuffer, FirstLineMaxLength, fp ); const tUint Len = strlen(smFirstLineBuffer); if (Len>0) smFirstLineBuffer[Len-1] = '\0'; mBufferFirstLine = smFirstLineBuffer; mBufferFirstLineCached = true; } /* ************************************************************ */ const tBool cVfsFile::supportsFsName() const { return true; } /* ************************************************************ */ const tFsNodeName cVfsFile::fsName() const { return mFsNodeName; } /* ************************************************************ */ void cVfsFile::clearCache() const { mBufferCached = false; mBuffer = ""; mBufferFirstLineCached = false; mBufferFirstLine = ""; mSizeCached = false; } /* ************************************************************ */ void cVfsFile::clear() { mFsNodeName.clear(); mVfsNodeName.clear(); mBuffer.clear(); } } // namespace

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