EgtGeneral/FileUtils.cpp

//----------------------------------------------------------------------------
//  EgalTech 2013-2020
//----------------------------------------------------------------------------
// File : FileUtils.cpp       Data : 14.02.20        Versione : 2.2b1
// Contenuto : Funzioni di utilità sui file.
//
//
//
// Modifiche : 11.12.13 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "\EgtDev\Include\EGnFileUtils.h"
#include "\EgtDev\Include\EGnStringUtils.h"
#include "\EgtDev\Include\EgtStringConverter.h"
#include <io.h>

using namespace std ;


//----------------------------------------------------------------------------
bool
ExistsFile( const string& sFile)
{
  // leggo gli attributi del file
   DWORD dwAttr = ::GetFileAttributesW( stringtoW( sFile)) ;
   
  // se non esiste
   if ( dwAttr == INVALID_FILE_ATTRIBUTES  ||
        dwAttr == INVALID_FILE_SIZE)
      return false ;

  // se è un direttorio
   if ( dwAttr & FILE_ATTRIBUTE_DIRECTORY)
      return false ;

   return true ;
}

//-----------------------------------------------------------------------------
bool
CopyFileEgt( const string& sFile, const string& sNewFile)
{
  // copio file
   if ( ::CopyFileW( stringtoW( sFile), stringtoW( sNewFile), false) == 0)
      return false ;
  // recupero data ultima scrittura file sorgente
   HANDLE hFile = CreateFileW( stringtoW( sFile), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL) ;
   if ( hFile == INVALID_HANDLE_VALUE)
      return true ;
   FILETIME ftWrite ;  
   bool bOk = ( GetFileTime( hFile, NULL, NULL, &ftWrite) != FALSE) ;
   CloseHandle( hFile) ;
   if ( ! bOk)
      return true ;
  // scrivo data ultima scrittura file destinazione
   HANDLE hNewFile = CreateFileW( stringtoW( sNewFile), GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL) ;
   if ( hNewFile == INVALID_HANDLE_VALUE)
      return true ;
   bool bNewOk = ( SetFileTime( hNewFile, NULL, NULL, &ftWrite) != FALSE) ;
   CloseHandle( hNewFile) ;
   return true ;
}

//-----------------------------------------------------------------------------
bool
RenameFile( const string& sFile, const string& sNewFile)
{
   return ( ::MoveFileW( stringtoW( sFile), stringtoW( sNewFile)) != 0) ;
}

//-----------------------------------------------------------------------------
bool
EraseFile( const string& sFile)
{
   return ( ::DeleteFileW( stringtoW( sFile)) != 0) ;
}

//-----------------------------------------------------------------------------
static bool
GetFileLastWriteTime( const string& sFile, FILETIME& ftWrite)
{
   HANDLE hFile = CreateFileW( stringtoW( sFile), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL) ;
   if ( hFile == INVALID_HANDLE_VALUE)
      return false ;
   bool bOk = ( GetFileTime( hFile, NULL, NULL, &ftWrite) != FALSE) ;
   CloseHandle( hFile) ;
   return bOk ;
}

//-----------------------------------------------------------------------------
bool
CompareFilesLastWriteTime( const string& sFile1, const string& sFile2, int& nRes)
{
   FILETIME ftWrite1 ;  
   if ( ! GetFileLastWriteTime( sFile1, ftWrite1))
      return false ;
   FILETIME ftWrite2 ;  
   if ( ! GetFileLastWriteTime( sFile2, ftWrite2))
      return false ;
   nRes = CompareFileTime( &ftWrite1, &ftWrite2) ;
   return true ;
}

//-----------------------------------------------------------------------------
string
GetFileExtension( const string& sFile)
{
  // separo l'estensione dal resto
   string sFileTitle ;
   string sFileExt ;
   SplitLast( sFile, ".", sFileTitle, sFileExt) ;
   if ( sFileExt.find_first_of( "/\\") != string::npos) {
      sFileTitle = sFile ;
      sFileExt = "" ;
   }
   return sFileExt ;
}

//-----------------------------------------------------------------------------
string
ChangeFileExtension( const string& sFile, const string& sNewExt)
{
  // separo l'estensione dal resto
   string sFileTitle ;
   string sFileExt ;
   SplitLast( sFile, ".", sFileTitle, sFileExt) ;
   if ( sFileExt.find_first_of( "/\\") != string::npos) {
      sFileTitle = sFile ;
      sFileExt = "" ;
   }
  // genero il nome con la nuova estensione
   if ( sNewExt[0] == '.')
      return ( sFileTitle + sNewExt) ;
   else
      return ( sFileTitle + "." + sNewExt) ;
}

//-----------------------------------------------------------------------------
bool
FileExtensionMatches( const string& sFile, const string& sExt)
{
  // separo l'estensione dal resto
   string sFileTitle ;
   string sFileExt ;
   SplitLast( sFile, ".", sFileTitle, sFileExt) ;
   if ( sFileExt.find_first_of( "/\\") != string::npos) {
      sFileTitle = sFile ;
      sFileExt = "" ;
   }
  // confronto
   return ( EqualNoCase( sFileExt, sExt)) ;
}

//-----------------------------------------------------------------------------
bool
FindFirstFileEgt( const string& sFileSpec, string& sFileName)
{
   wstring      sFileSpecW ;
   wstring      sFileW ;
   _wfinddata_t c_file ;
   intptr_t     hFile ;


   sFileSpecW = stringtoW( sFileSpec) ;
   
  // cerco il primo file che soddisfa le specifiche
   if ( ( hFile = _wfindfirst( sFileSpecW.c_str(), &c_file)) != -1L) {
      do {
         if ( c_file.attrib != _A_SUBDIR) {
            sFileName = LPSTR( WtoA( c_file.name)) ; 
            _findclose( hFile) ;
            errno = 0 ;
            return true ;
         }
      } while( _wfindnext( hFile, &c_file) == 0) ;
      _findclose( hFile) ;
      errno = 0 ;
   }

   return false ;
}

//----------------------------------------------------------------------------
string
GetFileName( const string& sPath)
{
  // cerco l'ultimo separatore
   size_t iPos = sPath.find_last_of( "/\\") ;
  // se non c'è, è solo il nome di un file 
   if ( iPos == string::npos)
      return sPath ;
  // ritorno la parte finale
   return sPath.substr( iPos+1) ;
}

//----------------------------------------------------------------------------
string
GetFileTitleEgt( const string& sPath)
{
  // cerco l'ultimo separatore
   size_t iPos = sPath.find_last_of( "/\\") ;
  // recupero il nome
   string sName = (( iPos == string::npos) ? sPath : sPath.substr( iPos + 1)) ;
  // tolgo l'eventuale estensione
   size_t iPos2 = sName.find_last_of( ".") ;
   return (( iPos2 == string::npos) ? sName : sName.substr( 0, iPos2)) ;
}

//----------------------------------------------------------------------------
string
GetDirectory( const string& sPath)
{
  // cerco l'ultimo separatore
   size_t iPos = sPath.find_last_of( "/\\") ;
  // se non c'è, è solo il nome di un file 
   if ( iPos == string::npos)
      return "" ;
  // ritorno la parte iniziale
   return sPath.substr( 0, iPos) ;
}

//----------------------------------------------------------------------------
bool
ExistsDirectory( const string& sDir)
{
  // leggo gli attributi del direttorio
   DWORD dwAttr = ::GetFileAttributesW( stringtoW( sDir)) ;
  // se non esiste
   if ( dwAttr == INVALID_FILE_ATTRIBUTES)
      return false ;
  // se è un direttorio
   return ( (dwAttr & FILE_ATTRIBUTE_DIRECTORY) != 0) ;
}

//-----------------------------------------------------------------------------
bool
CreateDirectoryEgt( const string& sDir)
{
   wstring sDirW = stringtoW( sDir) ;
   return ( ::CreateDirectoryW( sDirW.c_str(), NULL) != FALSE) ;
}

//-----------------------------------------------------------------------------
bool
EmptyDirectory( const string& sDir)
{
   wstring sDirW = stringtoW( sDir) ;
   wstring sFileW = sDirW + L"\\*.*" ;
   
  // ciclo su tutti i file del direttorio
   _wfinddata_t c_file ;
   intptr_t     hFile ;
   if ( ( hFile = _wfindfirst( sFileW.c_str(), &c_file)) != -1L) {
      do {
         if ( c_file.attrib != _A_SUBDIR) {
            sFileW = sDirW + L"\\" + c_file.name ; 
            ::DeleteFileW( sFileW.c_str()) ;
         }
      } while( _wfindnext( hFile, &c_file) == 0) ;
      _findclose( hFile) ;
      errno = 0 ;
   }

   return true ;
}

//-----------------------------------------------------------------------------
bool
EraseDirectory( const string& sDir)
{
   wstring sDirW = stringtoW( sDir) ;
   return( ::RemoveDirectoryW( sDirW.c_str()) != FALSE) ;
}