427 lines
11 KiB
C++
427 lines
11 KiB
C++
// * This file is part of the COLOBOT source code
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// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
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// *
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// * This program is free software: you can redistribute it and/or modify
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// * it under the terms of the GNU General Public License as published by
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// * the Free Software Foundation, either version 3 of the License, or
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// * (at your option) any later version.
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// *
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// * This program is distributed in the hope that it will be useful,
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// * but WITHOUT ANY WARRANTY; without even the implied warranty of
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// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// * GNU General Public License for more details.
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// *
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// * You should have received a copy of the GNU General Public License
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// * along with this program. If not, see http://www.gnu.org/licenses/.
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// definition of methods for class FILE
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// Static variables
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static CBotClass* m_pClassFILE;
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static CBotProgram* m_pFuncFile;
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static int m_CompteurFileOpen = 0;
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// Prepares a file name.
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void PrepareFilename(CBotString &filename) //DD!
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{
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int pos;
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pos = filename.ReverseFind('\\');
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if ( pos > 0 )
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{
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filename = filename.Mid(pos+1); // remove the records (files)??
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}
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pos = filename.ReverseFind('/');
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if ( pos > 0 )
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{
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filename = filename.Mid(pos+1); // also those with /
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}
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pos = filename.ReverseFind(':');
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if ( pos > 0 )
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{
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filename = filename.Mid(pos+1); // also removes the drive letter C:
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}
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filename = CBotString("files\\") + filename;
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}
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// constructor of the class
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// gets the filename as a parameter
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// execution
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bool rfconstruct (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult, int& Exception)
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{
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CBotString mode;
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// accepts no parameters
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if ( pVar == NULL ) return true;
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// must be a string
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if ( pVar->GetType() != CBotTypString ) { Exception = CBotErrBadString; return false; }
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CBotString filename = pVar->GetValString();
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PrepareFilename(filename); //DR
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// there may be a second parameter
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pVar = pVar->GetNext();
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if ( pVar != NULL )
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{
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// recovers the mode
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mode = pVar->GetValString();
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if ( mode != "r" && mode != "w" ) { Exception = CBotErrBadParam; return false; }
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// no third parameter, only two or one possible
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if ( pVar->GetNext() != NULL ) { Exception = CBotErrOverParam; return false; }
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}
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// save the file name
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pVar = pThis->GetItem("filename");
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pVar->SetValString(filename);
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if ( ! mode.IsEmpty() )
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{
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// open the called file
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FILE* pFile = fopen( filename, mode );
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if ( pFile == NULL ) { Exception = CBotErrFileOpen; return false; }
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m_CompteurFileOpen ++;
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// save the handle of file
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pVar = pThis->GetItem("handle");
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pVar->SetValInt((long)pFile);
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}
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return true;
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}
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// compilation
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CBotTypResult cfconstruct (CBotVar* pThis, CBotVar* &pVar)
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{
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// accepts no parameters
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if ( pVar == NULL ) return CBotTypResult( 0 );
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// must be a string
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if ( pVar->GetType() != CBotTypString )
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return CBotTypResult( CBotErrBadString );
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// there may be a second parameter
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pVar = pVar->GetNext();
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if ( pVar != NULL )
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{
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// must be a string
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if ( pVar->GetType() != CBotTypString )
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return CBotTypResult( CBotErrBadString );
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// no third parameter
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if ( pVar->GetNext() != NULL ) return CBotTypResult( CBotErrOverParam );
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}
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// le r<>sultat est de type void (constructeur)
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return CBotTypResult( 0 );
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}
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// destructor of the class
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// execution
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bool rfdestruct (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult, int& Exception)
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{
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// retrieves the element "handle"
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pVar = pThis->GetItem("handle");
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// not open? no problem
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if ( pVar->GetInit() != IS_DEF) return true;
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FILE* pFile= (FILE*)pVar->GetValInt();
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fclose(pFile);
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m_CompteurFileOpen --;
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pVar->SetInit(IS_NAN);
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return true;
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}
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// FILE :: open method
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// get the r / w mode as a parameter
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// execution
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bool rfopen (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult, int& Exception)
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{
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// there must be a parameter
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if ( pVar == NULL ) { Exception = CBotErrLowParam; return false; }
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// must be a string
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if ( pVar->GetType() != CBotTypString ) { Exception = CBotErrBadString; return false; }
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// there may be a second parameter
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if ( pVar->GetNext() != NULL )
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{
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// in this case the first parameter is the file name
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CBotString filename = pVar->GetValString();
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PrepareFilename(filename); //DR
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// saves the file name
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CBotVar* pVar2 = pThis->GetItem("filename");
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pVar2->SetValString(filename);
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// next parameter is the mode
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pVar = pVar -> GetNext();
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}
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CBotString mode = pVar->GetValString();
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if ( mode != "r" && mode != "w" ) { Exception = CBotErrBadParam; return false; }
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// No third parameter
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if ( pVar->GetNext() != NULL ) { Exception = CBotErrOverParam; return false; }
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// retrieves the element "handle"
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pVar = pThis->GetItem("handle");
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// which must not be initialized
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if ( pVar->GetInit() == IS_DEF) { Exception = CBotErrFileOpen; return false; }
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// contains filename
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pVar = pThis->GetItem("filename");
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CBotString filename = pVar->GetValString();
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PrepareFilename(filename); //DD! (if the name was assigned by h.filename = "...";
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// open requsted file
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FILE* pFile = fopen( filename, mode );
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if ( pFile == NULL ) //DR
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{
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pResult->SetValInt(false); //DR
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return true; //DR
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}
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m_CompteurFileOpen ++;
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// saves the handle of file
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pVar = pThis->GetItem("handle");
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pVar->SetValInt((long)pFile);
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pResult->SetValInt(true); //DR
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return true;
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}
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// compilation
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CBotTypResult cfopen (CBotVar* pThis, CBotVar* &pVar)
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{
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// there must be a parameter
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if ( pVar == NULL ) return CBotTypResult( CBotErrLowParam );
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// must be a string
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if ( pVar->GetType() != CBotTypString )
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return CBotTypResult( CBotErrBadString );
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// there may be a second parameter
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pVar = pVar->GetNext();
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if ( pVar != NULL )
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{
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// must be a string
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if ( pVar->GetType() != CBotTypString )
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return CBotTypResult( CBotErrBadString );
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// no third parameter
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if ( pVar->GetNext() != NULL ) return CBotTypResult( CBotErrOverParam );
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}
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// the result is of type bool
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return CBotTypResult(CBotTypBoolean); //DR
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}
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// FILE :: close method
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// execution
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bool rfclose (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult, int& Exception)
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{
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// it should not be any parameter
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if ( pVar != NULL ) return CBotErrOverParam;
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// retrieves the element "handle"
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pVar = pThis->GetItem("handle");
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if ( pVar->GetInit() != IS_DEF) { Exception = CBotErrNotOpen; return false; }
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FILE* pFile= (FILE*)pVar->GetValInt();
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fclose(pFile);
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m_CompteurFileOpen --;
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pVar->SetInit(IS_NAN);
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return true;
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}
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// compilation
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CBotTypResult cfclose (CBotVar* pThis, CBotVar* &pVar)
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{
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// it should not be any parameter
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if ( pVar != NULL ) return CBotTypResult( CBotErrOverParam );
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// function returns a result "void"
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return CBotTypResult( 0 );
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}
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// FILE :: writeln method
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// execution
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bool rfwrite (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult, int& Exception)
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{
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// there must be a parameter
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if ( pVar == NULL ) { Exception = CBotErrLowParam; return false; }
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// must be a string
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if ( pVar->GetType() != CBotTypString ) { Exception = CBotErrBadString; return false; }
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CBotString param = pVar->GetValString();
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//retrieves the element "handle"
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pVar = pThis->GetItem("handle");
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if ( pVar->GetInit() != IS_DEF) { Exception = CBotErrNotOpen; return false; }
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FILE* pFile= (FILE*)pVar->GetValInt();
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int res = fputs(param+CBotString("\n"), pFile);
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// on error throws an exception
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if ( res < 0 ) { Exception = CBotErrWrite; return false; }
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return true;
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}
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// compilation
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CBotTypResult cfwrite (CBotVar* pThis, CBotVar* &pVar)
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{
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// there must be a parameter
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if ( pVar == NULL ) return CBotTypResult( CBotErrLowParam );
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// must be a string
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if ( pVar->GetType() != CBotTypString ) return CBotTypResult( CBotErrBadString );
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// no other parameter
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if ( pVar->GetNext() != NULL ) return CBotTypResult( CBotErrOverParam );
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// function returns "void" result
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return CBotTypResult( 0 );
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}
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// FILE :: readln method
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// execution
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bool rfread (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult, int& Exception)
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{
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// there shouldn't be any parameter
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if ( pVar != NULL ) { Exception = CBotErrOverParam; return false; }
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//retrieves the element "handle"
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pVar = pThis->GetItem("handle");
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if ( pVar->GetInit() != IS_DEF) { Exception = CBotErrNotOpen; return false; }
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FILE* pFile= (FILE*)pVar->GetValInt();
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char chaine[2000];
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int i;
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for ( i = 0 ; i < 2000 ; i++ ) chaine[i] = 0;
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fgets(chaine, 1999, pFile);
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for ( i = 0 ; i < 2000 ; i++ ) if (chaine[i] == '\n') chaine[i] = 0;
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// on error throws an exception
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if ( ferror(pFile) ) { Exception = CBotErrRead; return false; }
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pResult->SetValString( chaine );
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return true;
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}
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// compilation
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CBotTypResult cfread (CBotVar* pThis, CBotVar* &pVar)
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{
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// there shouldn't be any parameter
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if ( pVar != NULL ) return CBotTypResult( CBotErrOverParam );
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// function return "string" result
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return CBotTypResult( CBotTypString );
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}
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// FILE :: readln method
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// execution
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bool rfeof (CBotVar* pThis, CBotVar* pVar, CBotVar* pResult, int& Exception)
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{
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// there shouldn't be any parameter
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if ( pVar != NULL ) { Exception = CBotErrOverParam; return false; }
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// retrieves the element "handle"
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pVar = pThis->GetItem("handle");
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if ( pVar->GetInit() != IS_DEF) { Exception = CBotErrNotOpen; return false; }
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FILE* pFile= (FILE*)pVar->GetValInt();
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pResult->SetValInt( feof( pFile ) );
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return true;
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}
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// compilation
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CBotTypResult cfeof (CBotVar* pThis, CBotVar* &pVar)
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{
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// there shouldn't be any parameter
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if ( pVar != NULL ) return CBotTypResult( CBotErrOverParam );
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// function return boolean result
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return CBotTypResult( CBotTypBoolean );
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}
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void InitClassFILE()
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{
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// creates a class for file management
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// the usage is as follows:
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// file canal( "NomFichier.txt" )
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// canal.open( "r" ); // open reading
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// s = canal.readln( ); // reads a line
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// canal.close(); // closes the file
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// create class FILE
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m_pClassFILE = new CBotClass("file", NULL);
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// add the component ".filename"
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m_pClassFILE->AddItem("filename", CBotTypString);
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// add the component ".handle"
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m_pClassFILE->AddItem("handle", CBotTypInt, PR_PRIVATE);
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// define a constructor and destructor
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m_pClassFILE->AddFunction("file", rfconstruct, cfconstruct );
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m_pClassFILE->AddFunction("~file", rfdestruct, NULL );
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// defined associated methods
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m_pClassFILE->AddFunction("open", rfopen, cfopen );
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m_pClassFILE->AddFunction("close", rfclose, cfclose );
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m_pClassFILE->AddFunction("writeln", rfwrite, cfwrite );
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m_pClassFILE->AddFunction("readln", rfread, cfread );
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m_pClassFILE->AddFunction("eof", rfeof, cfeof );
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m_pFuncFile = new CBotProgram( );
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CBotStringArray ListFonctions;
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m_pFuncFile->Compile( "public file openfile(string name, string mode) {return new file(name, mode);}", ListFonctions);
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m_pFuncFile->SetIdent(-2); // restoreState as a special identifier for this function
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}
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