345 lines
10 KiB
C++
345 lines
10 KiB
C++
/*
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=======================================================================================
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Name :SaveMngr.cpp
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Author :Vincent Lhullier Date :11/07/97
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Description :manage save of data before modification
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Create a copy of GameData tree with all file that would be modified. That will allow
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someone to recuperate previous version if save generate some problem in data.
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=======================================================================================
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Modification -> Author : Date :
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Description :
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=======================================================================================
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*/
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/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
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#include "stdafx.h"
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#include <io.h>
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#include <sys/stat.h>
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#include "SaveMngr.h"
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#include "IniData.h"
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/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
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/*
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=======================================================================================
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CONSTANTS
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=======================================================================================
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*/
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#define C_szGameDataDir "GameData"
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#define C_szOldGameDataDir "GameDat_"
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/*
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=======================================================================================
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GLOBALS
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=======================================================================================
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*/
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static char SAVE_g_szDirName[ _MAX_PATH ];
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/*
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=======================================================================================
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=======================================================================================
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FUNCTIONS
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=======================================================================================
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=======================================================================================
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*/
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/*
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=======================================================================================
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Directory Functions
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=======================================================================================
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*/
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/*
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----------------------------------------------------------------------------------------
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Don't call this function directly, it is used by SAVE_fn_bDeleteTree
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Description : delete recursively a directory
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Returns (BOOL ) true if success
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----------------------------------------------------------------------------------------
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*/
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BOOL fn_bDeleteTree( void )
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{
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WIN32_FIND_DATA stFindData;
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HANDLE hFind;
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char *p_szEndDirName;
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p_szEndDirName = SAVE_g_szDirName + strlen( SAVE_g_szDirName );
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strcpy( p_szEndDirName, "\\*.*" );
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if( (hFind = FindFirstFile(SAVE_g_szDirName, &stFindData )) == INVALID_HANDLE_VALUE)
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return TRUE;
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*p_szEndDirName = 0;
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do
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{
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*p_szEndDirName = '\\';
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strcpy( p_szEndDirName + 1, stFindData.cFileName );
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if ( stFindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
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{
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if ( *stFindData.cFileName != '.')
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{
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if ( !fn_bDeleteTree() )
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return FALSE;
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}
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}
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else
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{
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if (_access( SAVE_g_szDirName, 2) == -1 )
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_chmod( SAVE_g_szDirName, _S_IWRITE );
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if ( !DeleteFile( SAVE_g_szDirName ) )
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return FALSE;
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}
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*p_szEndDirName = 0;
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} while(FindNextFile( hFind, &stFindData ));
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FindClose( hFind );
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return RemoveDirectory( SAVE_g_szDirName );
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}
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/*
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----------------------------------------------------------------------------------------
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Description : delete completely a directory
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szDirName -> name of dir to delete
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Returns (BOOL ) true if success
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----------------------------------------------------------------------------------------
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*/
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BOOL SAVE_fn_bDeleteTree( char *szDirName )
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{
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strcpy( SAVE_g_szDirName, szDirName );
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return fn_bDeleteTree();
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}
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/*
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=======================================================================================
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Error functions
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=======================================================================================
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*/
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/*
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----------------------------------------------------------------------------------------
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Description : display an error message
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_szMessage -> message to display
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----------------------------------------------------------------------------------------
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*/
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void SAVE_fn_vErrorMessage( char *_szMessage )
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{
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char szError[1024];
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char *p_szError = szError;
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p_szError += sprintf( p_szError, "Error deleting all existing version of saved data\n" );
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p_szError += sprintf( p_szError, "Data in %s.XXX directory will not be correct\n" );
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p_szError += sprintf( p_szError, "---------------------------------------------------\n" );
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p_szError += sprintf( p_szError, "%s\n\n", _szMessage );
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AfxMessageBox( szError, MB_ICONSTOP | MB_OK );
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}
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/*
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=======================================================================================
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Version functions
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=======================================================================================
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*/
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/*
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----------------------------------------------------------------------------------------
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Description :
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_szSavedDirectoryName -> name of directory from which function extract version number
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Returns (long ) version number if it's a valid directory, -1 else
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----------------------------------------------------------------------------------------
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*/
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long SAVE_fn_lGetVersionNumberFromDirExt( char *_szSavedDirectoryName )
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{
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char *p_szExt;
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long lVersionNumber = -1;
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p_szExt = strchr( _szSavedDirectoryName, '.' );
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if (p_szExt != NULL)
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{
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if ( strlen( ++p_szExt ) == 3)
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{
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lVersionNumber = 0;
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while (*p_szExt != 0)
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{
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if ( !isdigit (*p_szExt) )
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return -1;
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lVersionNumber = lVersionNumber * 10 + (*p_szExt++ - '0');
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}
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}
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}
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return lVersionNumber;
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}
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/*
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----------------------------------------------------------------------------------------
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Description : return name of directory used to store data for a given version
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lVersion -> version number
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szVersionDirName -> to put dir name (assumed to be long enough )
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----------------------------------------------------------------------------------------
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*/
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void SAVE_fn_vGetVersionDirName( long _lVersion, char *_szVersionDirName, BOOL _bOld )
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{
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sprintf( _szVersionDirName, "%s\\..\\%s.%03d", g_stIniData.szLocalPath, _bOld ? C_szOldGameDataDir : C_szGameDataDir, _lVersion );
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}
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/*
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----------------------------------------------------------------------------------------
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Description : delete a version directory
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_lVersion -> number of version
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Returns (BOOL ) true if success
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----------------------------------------------------------------------------------------
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*/
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BOOL SAVE_fn_bDeleteVersion( long _lVersion, BOOL _bOld )
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{
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char szVersionName[ _MAX_PATH ];
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SAVE_fn_vGetVersionDirName( _lVersion, szVersionName, _bOld);
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if (!SAVE_fn_bDeleteTree( szVersionName ))
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{
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char szMessage[100];
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sprintf( szMessage, "Can't delete old %s version directory", szVersionName );
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SAVE_fn_vErrorMessage( szMessage );
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return FALSE;
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}
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return TRUE;
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}
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/*
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----------------------------------------------------------------------------------------
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Description : analyse the current version that are on disk
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a_cVersion -> array of 1000 char that will be filled
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each case is a flag that indicate if a version number is used or not
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return (long) number of used version
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----------------------------------------------------------------------------------------
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*/
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long SAVE_fn_lGetUsedVersion( char *a_cVersion, BOOL _bOld )
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{
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WIN32_FIND_DATA stFindData;
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HANDLE hFind;
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char szFilter[ _MAX_PATH ];
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long lNumberOfVersions = 0;
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long lVersion;
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/*
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* set all version as unused
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*/
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memset ( a_cVersion , 0, 1000 );
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sprintf( szFilter, "%s\\..\\%s.*", g_stIniData.szLocalPath, _bOld ? C_szOldGameDataDir : C_szGameDataDir );
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if( (hFind = FindFirstFile(szFilter, &stFindData )) == INVALID_HANDLE_VALUE)
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return 0;
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do
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{
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if ( stFindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
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{
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lVersion = SAVE_fn_lGetVersionNumberFromDirExt( stFindData.cFileName );
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if (lVersion != -1)
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{
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a_cVersion[ lVersion ] = 1;
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lNumberOfVersions++ ;
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}
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}
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} while(FindNextFile( hFind, &stFindData ));
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FindClose( hFind );
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return lNumberOfVersions;
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}
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/*
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----------------------------------------------------------------------------------------
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Description : rename a version
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_lOldVersion -> old version number
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_lNewVersion -> new version number
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Returns (BOOL )
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----------------------------------------------------------------------------------------
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*/
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BOOL SAVE_fn_bRenameVersionToOldVersion( long _lVersion )
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{
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char szOldVersion[ _MAX_PATH ];
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char szVersion[ _MAX_PATH ];
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SAVE_fn_vGetVersionDirName( _lVersion, szVersion, FALSE );
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SAVE_fn_vGetVersionDirName( _lVersion, szOldVersion, TRUE );
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if ( !MoveFile( szVersion, szOldVersion) )
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{
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char szMessage[100];
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sprintf( szMessage, "Can't rename %s version to old version %s ", szVersion, szOldVersion );
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SAVE_fn_vErrorMessage( szMessage );
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return FALSE;
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}
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return TRUE;
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}
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/*
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=======================================================================================
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principal function
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=======================================================================================
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*/
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/*
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----------------------------------------------------------------------------------------
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Description : delete all old versions and rename recent version
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----------------------------------------------------------------------------------------
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*/
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BOOL SAVE_fn_bDeleteAllVersions( void )
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{
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char a_cVersion[1000];
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long lNumberOfVersions;
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long lVersion;
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long lVersionIndex;
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/*
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* get old used versions
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*/
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lNumberOfVersions = SAVE_fn_lGetUsedVersion( a_cVersion, TRUE );
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/*
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* remove all old versions
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*/
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for (lVersion = 0, lVersionIndex = 0; lVersion < lNumberOfVersions; lVersionIndex ++)
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{
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if (a_cVersion[ lVersionIndex ])
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{
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lVersion ++;
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if (!SAVE_fn_bDeleteVersion( lVersionIndex, TRUE ))
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return FALSE;
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}
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}
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/*
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* get used versions
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*/
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lNumberOfVersions = SAVE_fn_lGetUsedVersion( a_cVersion, FALSE );
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if (lNumberOfVersions == 0)
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return TRUE;
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/*
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* check for hole in version number
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*/
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for (lVersion = 0, lVersionIndex = 0; lVersion < lNumberOfVersions; lVersionIndex ++)
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{
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if (a_cVersion[ lVersionIndex ])
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{
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lVersion ++;
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if (!SAVE_fn_bRenameVersionToOldVersion( lVersionIndex ))
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return FALSE;
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}
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}
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return TRUE;
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}
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