how to validate path 1

[gacaccia]

hi all,

trying to make a simple c++ console application. it takes a path specified by a user and updates some configuration files with the new info. how do i validate the path? i know how to validate the existance of a file, but not a folder.

thanks,

glenn

 

[MKuiper]

#include <windows.h>

DWORD dwAttributes = GetFileAttributes ( &quot;C:\\Is\\This\\A\\Directory&quot; );
if ( dwAttributes == 0xffffffff )
   { // GetFileAttributes failed
     // call GetLastError ( ) to find out why
   } else
   { if ( dwAttributes & FILE_ATTRIBUTE_DIRECTORY )
        { // It is a directory
        } else
        { // it is not a directory
        } }

Marcel

 

[gacaccia]

one problem i just noticed with the above mentioned solution, it doens't work if the path is to the root of a drive. how would i validate a path in this case?

thanks,

glenn

 

[MKuiper]

glenn,

I have no problem with the code above. Perhaps it is os-dependent (i use xp pro)? Problem might be with some older os a trailing backslash is required for the root and not for subdirs. Try using "X:\\" instead of "X:".

If that doesn't help, test for a root yourself. Change the code like this:


BOOL fIsRootValid ( char *Name )
{
if ( Name == NULL )
{ return FALSE; }
if ( strlen ( Name ) < 2 || strlen ( Name ) > 3 )
{ return FALSE; }
char Root[4];
strcpy ( Root, Name );
if ( strlen ( Root ) == 2 )
{ strcat ( Root, &quot;\\&quot; ); }
UINT uType = GetDriveType ( Root );
switch ( uType )
{ case DRIVE_UNKNOWN :
case DRIVE_NO_ROOT_DIR :
return FALSE;
case DRIVE_REMOVABLE :
case DRIVE_FIXED :
case DRIVE_REMOTE :
case DRIVE_CDROM :
case DRIVE_RAMDISK :
return TRUE;
default :
return FALSE; }
return FALSE; }


BOOL fIsDirValid ( char *Dirname )
{
if ( Dirname == NULL )
{ return FALSE; }
if ( strlen ( Dirname ) == 2 &&
*( Dirname + 1 ) == ':' )
{ return fIsRootValid ( Dirname ); }
if ( strlen ( Dirname ) == 3 &&
*( Dirname + 1 ) == ':' &&
*( Dirname + 2 ) == '\\' )
{ return fIsRootValid ( Dirname ); }
DWORD dwAttributes = GetFileAttributes ( Dirname );
if ( dwAttributes == 0xffffffff )
{ return FALSE; }
if ( dwAttributes & FILE_ATTRIBUTE_DIRECTORY )
{ return TRUE; }
return FALSE; }





Marcel

 

[gacaccia]

oops, my mistake in using your previous code. you're right, it does work. thanks again and for the additional examples.

glenn